"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.MysqlQueryRunner = void 0;
const error_1 = require("../../error");
const QueryFailedError_1 = require("../../error/QueryFailedError");
const QueryRunnerAlreadyReleasedError_1 = require("../../error/QueryRunnerAlreadyReleasedError");
const TransactionNotStartedError_1 = require("../../error/TransactionNotStartedError");
const BaseQueryRunner_1 = require("../../query-runner/BaseQueryRunner");
const QueryResult_1 = require("../../query-runner/QueryResult");
const Table_1 = require("../../schema-builder/table/Table");
const TableColumn_1 = require("../../schema-builder/table/TableColumn");
const TableForeignKey_1 = require("../../schema-builder/table/TableForeignKey");
const TableIndex_1 = require("../../schema-builder/table/TableIndex");
const TableUnique_1 = require("../../schema-builder/table/TableUnique");
const View_1 = require("../../schema-builder/view/View");
const Broadcaster_1 = require("../../subscriber/Broadcaster");
const BroadcasterResult_1 = require("../../subscriber/BroadcasterResult");
const InstanceChecker_1 = require("../../util/InstanceChecker");
const OrmUtils_1 = require("../../util/OrmUtils");
const VersionUtils_1 = require("../../util/VersionUtils");
const DriverUtils_1 = require("../DriverUtils");
const Query_1 = require("../Query");
const MetadataTableType_1 = require("../types/MetadataTableType");
/**
 * Runs queries on a single mysql database connection.
 */
class MysqlQueryRunner extends BaseQueryRunner_1.BaseQueryRunner {
    // -------------------------------------------------------------------------
    // Constructor
    // -------------------------------------------------------------------------
    constructor(driver, mode) {
        super();
        this.driver = driver;
        this.connection = driver.connection;
        this.broadcaster = new Broadcaster_1.Broadcaster(this);
        this.mode = mode;
    }
    // -------------------------------------------------------------------------
    // Public Methods
    // -------------------------------------------------------------------------
    /**
     * Creates/uses database connection from the connection pool to perform further operations.
     * Returns obtained database connection.
     */
    connect() {
        if (this.databaseConnection)
            return Promise.resolve(this.databaseConnection);
        if (this.databaseConnectionPromise)
            return this.databaseConnectionPromise;
        if (this.mode === "slave" && this.driver.isReplicated) {
            this.databaseConnectionPromise = this.driver
                .obtainSlaveConnection()
                .then((connection) => {
                this.databaseConnection = connection;
                return this.databaseConnection;
            });
        }
        else {
            // master
            this.databaseConnectionPromise = this.driver
                .obtainMasterConnection()
                .then((connection) => {
                this.databaseConnection = connection;
                return this.databaseConnection;
            });
        }
        return this.databaseConnectionPromise;
    }
    /**
     * Releases used database connection.
     * You cannot use query runner methods once its released.
     */
    release() {
        this.isReleased = true;
        if (this.databaseConnection)
            this.databaseConnection.release();
        return Promise.resolve();
    }
    /**
     * Starts transaction on the current connection.
     */
    async startTransaction(isolationLevel) {
        this.isTransactionActive = true;
        try {
            await this.broadcaster.broadcast("BeforeTransactionStart");
        }
        catch (err) {
            this.isTransactionActive = false;
            throw err;
        }
        if (this.transactionDepth === 0) {
            if (isolationLevel) {
                await this.query("SET TRANSACTION ISOLATION LEVEL " + isolationLevel);
            }
            await this.query("START TRANSACTION");
        }
        else {
            await this.query(`SAVEPOINT typeorm_${this.transactionDepth}`);
        }
        this.transactionDepth += 1;
        await this.broadcaster.broadcast("AfterTransactionStart");
    }
    /**
     * Commits transaction.
     * Error will be thrown if transaction was not started.
     */
    async commitTransaction() {
        if (!this.isTransactionActive)
            throw new TransactionNotStartedError_1.TransactionNotStartedError();
        await this.broadcaster.broadcast("BeforeTransactionCommit");
        if (this.transactionDepth > 1) {
            await this.query(`RELEASE SAVEPOINT typeorm_${this.transactionDepth - 1}`);
        }
        else {
            await this.query("COMMIT");
            this.isTransactionActive = false;
        }
        this.transactionDepth -= 1;
        await this.broadcaster.broadcast("AfterTransactionCommit");
    }
    /**
     * Rollbacks transaction.
     * Error will be thrown if transaction was not started.
     */
    async rollbackTransaction() {
        if (!this.isTransactionActive)
            throw new TransactionNotStartedError_1.TransactionNotStartedError();
        await this.broadcaster.broadcast("BeforeTransactionRollback");
        if (this.transactionDepth > 1) {
            await this.query(`ROLLBACK TO SAVEPOINT typeorm_${this.transactionDepth - 1}`);
        }
        else {
            await this.query("ROLLBACK");
            this.isTransactionActive = false;
        }
        this.transactionDepth -= 1;
        await this.broadcaster.broadcast("AfterTransactionRollback");
    }
    /**
     * Executes a raw SQL query.
     */
    async query(query, parameters, useStructuredResult = false) {
        if (this.isReleased)
            throw new QueryRunnerAlreadyReleasedError_1.QueryRunnerAlreadyReleasedError();
        const databaseConnection = await this.connect();
        this.driver.connection.logger.logQuery(query, parameters, this);
        await this.broadcaster.broadcast("BeforeQuery", query, parameters);
        const broadcasterResult = new BroadcasterResult_1.BroadcasterResult();
        const queryStartTime = Date.now();
        return new Promise(async (ok, fail) => {
            try {
                const enableQueryTimeout = this.driver.options.enableQueryTimeout;
                const maxQueryExecutionTime = this.driver.options.maxQueryExecutionTime;
                const queryPayload = enableQueryTimeout && maxQueryExecutionTime
                    ? { sql: query, timeout: maxQueryExecutionTime }
                    : query;
                databaseConnection.query(queryPayload, parameters, (err, raw) => {
                    // log slow queries if maxQueryExecution time is set
                    const maxQueryExecutionTime = this.driver.options.maxQueryExecutionTime;
                    const queryEndTime = Date.now();
                    const queryExecutionTime = queryEndTime - queryStartTime;
                    if (maxQueryExecutionTime &&
                        queryExecutionTime > maxQueryExecutionTime)
                        this.driver.connection.logger.logQuerySlow(queryExecutionTime, query, parameters, this);
                    if (err) {
                        this.driver.connection.logger.logQueryError(err, query, parameters, this);
                        this.broadcaster.broadcastAfterQueryEvent(broadcasterResult, query, parameters, false, undefined, undefined, err);
                        return fail(new QueryFailedError_1.QueryFailedError(query, parameters, err));
                    }
                    this.broadcaster.broadcastAfterQueryEvent(broadcasterResult, query, parameters, true, queryExecutionTime, raw, undefined);
                    const result = new QueryResult_1.QueryResult();
                    result.raw = raw;
                    try {
                        result.records = Array.from(raw);
                    }
                    catch {
                        // Do nothing.
                    }
                    if (raw?.hasOwnProperty("affectedRows")) {
                        result.affected = raw.affectedRows;
                    }
                    if (useStructuredResult) {
                        ok(result);
                    }
                    else {
                        ok(result.raw);
                    }
                });
            }
            catch (err) {
                fail(err);
            }
            finally {
                await broadcasterResult.wait();
            }
        });
    }
    /**
     * Returns raw data stream.
     */
    stream(query, parameters, onEnd, onError) {
        if (this.isReleased)
            throw new QueryRunnerAlreadyReleasedError_1.QueryRunnerAlreadyReleasedError();
        return new Promise(async (ok, fail) => {
            try {
                const databaseConnection = await this.connect();
                this.driver.connection.logger.logQuery(query, parameters, this);
                const databaseQuery = databaseConnection.query(query, parameters);
                if (onEnd)
                    databaseQuery.on("end", onEnd);
                if (onError)
                    databaseQuery.on("error", onError);
                ok(databaseQuery.stream());
            }
            catch (err) {
                fail(err);
            }
        });
    }
    /**
     * Returns all available database names including system databases.
     */
    async getDatabases() {
        return Promise.resolve([]);
    }
    /**
     * Returns all available schema names including system schemas.
     * If database parameter specified, returns schemas of that database.
     */
    async getSchemas(database) {
        throw new error_1.TypeORMError(`MySql driver does not support table schemas`);
    }
    /**
     * Checks if database with the given name exist.
     */
    async hasDatabase(database) {
        const result = await this.query(`SELECT * FROM \`INFORMATION_SCHEMA\`.\`SCHEMATA\` WHERE \`SCHEMA_NAME\` = '${database}'`);
        return result.length ? true : false;
    }
    /**
     * Loads currently using database
     */
    async getCurrentDatabase() {
        const query = await this.query(`SELECT DATABASE() AS \`db_name\``);
        return query[0]["db_name"];
    }
    /**
     * Checks if schema with the given name exist.
     */
    async hasSchema(schema) {
        throw new error_1.TypeORMError(`MySql driver does not support table schemas`);
    }
    /**
     * Loads currently using database schema
     */
    async getCurrentSchema() {
        const query = await this.query(`SELECT SCHEMA() AS \`schema_name\``);
        return query[0]["schema_name"];
    }
    /**
     * Checks if table with the given name exist in the database.
     */
    async hasTable(tableOrName) {
        const parsedTableName = this.driver.parseTableName(tableOrName);
        const sql = `SELECT * FROM \`INFORMATION_SCHEMA\`.\`COLUMNS\` WHERE \`TABLE_SCHEMA\` = '${parsedTableName.database}' AND \`TABLE_NAME\` = '${parsedTableName.tableName}'`;
        const result = await this.query(sql);
        return result.length ? true : false;
    }
    /**
     * Checks if column with the given name exist in the given table.
     */
    async hasColumn(tableOrName, column) {
        const parsedTableName = this.driver.parseTableName(tableOrName);
        const columnName = InstanceChecker_1.InstanceChecker.isTableColumn(column)
            ? column.name
            : column;
        const sql = `SELECT * FROM \`INFORMATION_SCHEMA\`.\`COLUMNS\` WHERE \`TABLE_SCHEMA\` = '${parsedTableName.database}' AND \`TABLE_NAME\` = '${parsedTableName.tableName}' AND \`COLUMN_NAME\` = '${columnName}'`;
        const result = await this.query(sql);
        return result.length ? true : false;
    }
    /**
     * Creates a new database.
     */
    async createDatabase(database, ifNotExist) {
        const up = ifNotExist
            ? `CREATE DATABASE IF NOT EXISTS \`${database}\``
            : `CREATE DATABASE \`${database}\``;
        const down = `DROP DATABASE \`${database}\``;
        await this.executeQueries(new Query_1.Query(up), new Query_1.Query(down));
    }
    /**
     * Drops database.
     */
    async dropDatabase(database, ifExist) {
        const up = ifExist
            ? `DROP DATABASE IF EXISTS \`${database}\``
            : `DROP DATABASE \`${database}\``;
        const down = `CREATE DATABASE \`${database}\``;
        await this.executeQueries(new Query_1.Query(up), new Query_1.Query(down));
    }
    /**
     * Creates a new table schema.
     */
    async createSchema(schemaPath, ifNotExist) {
        throw new error_1.TypeORMError(`Schema create queries are not supported by MySql driver.`);
    }
    /**
     * Drops table schema.
     */
    async dropSchema(schemaPath, ifExist) {
        throw new error_1.TypeORMError(`Schema drop queries are not supported by MySql driver.`);
    }
    /**
     * Creates a new table.
     */
    async createTable(table, ifNotExist = false, createForeignKeys = true) {
        if (ifNotExist) {
            const isTableExist = await this.hasTable(table);
            if (isTableExist)
                return Promise.resolve();
        }
        const upQueries = [];
        const downQueries = [];
        upQueries.push(this.createTableSql(table, createForeignKeys));
        downQueries.push(this.dropTableSql(table));
        // we must first drop indices, than drop foreign keys, because drop queries runs in reversed order
        // and foreign keys will be dropped first as indices. This order is very important, because we can't drop index
        // if it related to the foreign key.
        // createTable does not need separate method to create indices, because it create indices in the same query with table creation.
        table.indices.forEach((index) => downQueries.push(this.dropIndexSql(table, index)));
        // if createForeignKeys is true, we must drop created foreign keys in down query.
        // createTable does not need separate method to create foreign keys, because it create fk's in the same query with table creation.
        if (createForeignKeys)
            table.foreignKeys.forEach((foreignKey) => downQueries.push(this.dropForeignKeySql(table, foreignKey)));
        // if table has column with generated type, we must add the expression to the metadata table
        const generatedColumns = table.columns.filter((column) => column.generatedType && column.asExpression);
        for (const column of generatedColumns) {
            const currentDatabase = await this.getCurrentDatabase();
            const insertQuery = this.insertTypeormMetadataSql({
                schema: currentDatabase,
                table: table.name,
                type: MetadataTableType_1.MetadataTableType.GENERATED_COLUMN,
                name: column.name,
                value: column.asExpression,
            });
            const deleteQuery = this.deleteTypeormMetadataSql({
                schema: currentDatabase,
                table: table.name,
                type: MetadataTableType_1.MetadataTableType.GENERATED_COLUMN,
                name: column.name,
            });
            upQueries.push(insertQuery);
            downQueries.push(deleteQuery);
        }
        return this.executeQueries(upQueries, downQueries);
    }
    /**
     * Drop the table.
     */
    async dropTable(target, ifExist, dropForeignKeys = true) {
        // It needs because if table does not exist and dropForeignKeys or dropIndices is true, we don't need
        // to perform drop queries for foreign keys and indices.
        if (ifExist) {
            const isTableExist = await this.hasTable(target);
            if (!isTableExist)
                return Promise.resolve();
        }
        // if dropTable called with dropForeignKeys = true, we must create foreign keys in down query.
        const createForeignKeys = dropForeignKeys;
        const tablePath = this.getTablePath(target);
        const table = await this.getCachedTable(tablePath);
        const upQueries = [];
        const downQueries = [];
        if (dropForeignKeys)
            table.foreignKeys.forEach((foreignKey) => upQueries.push(this.dropForeignKeySql(table, foreignKey)));
        table.indices.forEach((index) => upQueries.push(this.dropIndexSql(table, index)));
        upQueries.push(this.dropTableSql(table));
        downQueries.push(this.createTableSql(table, createForeignKeys));
        // if table had columns with generated type, we must remove the expression from the metadata table
        const generatedColumns = table.columns.filter((column) => column.generatedType && column.asExpression);
        for (const column of generatedColumns) {
            const currentDatabase = await this.getCurrentDatabase();
            const deleteQuery = this.deleteTypeormMetadataSql({
                schema: currentDatabase,
                table: table.name,
                type: MetadataTableType_1.MetadataTableType.GENERATED_COLUMN,
                name: column.name,
            });
            const insertQuery = this.insertTypeormMetadataSql({
                schema: currentDatabase,
                table: table.name,
                type: MetadataTableType_1.MetadataTableType.GENERATED_COLUMN,
                name: column.name,
                value: column.asExpression,
            });
            upQueries.push(deleteQuery);
            downQueries.push(insertQuery);
        }
        await this.executeQueries(upQueries, downQueries);
    }
    /**
     * Creates a new view.
     */
    async createView(view, syncWithMetadata = false) {
        const upQueries = [];
        const downQueries = [];
        upQueries.push(this.createViewSql(view));
        if (syncWithMetadata)
            upQueries.push(await this.insertViewDefinitionSql(view));
        downQueries.push(this.dropViewSql(view));
        if (syncWithMetadata)
            downQueries.push(await this.deleteViewDefinitionSql(view));
        await this.executeQueries(upQueries, downQueries);
    }
    /**
     * Drops the view.
     */
    async dropView(target) {
        const viewName = InstanceChecker_1.InstanceChecker.isView(target) ? target.name : target;
        const view = await this.getCachedView(viewName);
        const upQueries = [];
        const downQueries = [];
        upQueries.push(await this.deleteViewDefinitionSql(view));
        upQueries.push(this.dropViewSql(view));
        downQueries.push(await this.insertViewDefinitionSql(view));
        downQueries.push(this.createViewSql(view));
        await this.executeQueries(upQueries, downQueries);
    }
    /**
     * Renames a table.
     */
    async renameTable(oldTableOrName, newTableName) {
        const upQueries = [];
        const downQueries = [];
        const oldTable = InstanceChecker_1.InstanceChecker.isTable(oldTableOrName)
            ? oldTableOrName
            : await this.getCachedTable(oldTableOrName);
        const newTable = oldTable.clone();
        const { database } = this.driver.parseTableName(oldTable);
        newTable.name = database ? `${database}.${newTableName}` : newTableName;
        // rename table
        upQueries.push(new Query_1.Query(`RENAME TABLE ${this.escapePath(oldTable)} TO ${this.escapePath(newTable)}`));
        downQueries.push(new Query_1.Query(`RENAME TABLE ${this.escapePath(newTable)} TO ${this.escapePath(oldTable)}`));
        // rename index constraints
        newTable.indices.forEach((index) => {
            const oldIndexName = this.connection.namingStrategy.indexName(oldTable, index.columnNames);
            // Skip renaming if Index has user defined constraint name
            if (index.name !== oldIndexName)
                return;
            // build new constraint name
            const columnNames = index.columnNames
                .map((column) => `\`${column}\``)
                .join(", ");
            const newIndexName = this.connection.namingStrategy.indexName(newTable, index.columnNames, index.where);
            // build queries
            let indexType = "";
            if (index.isUnique)
                indexType += "UNIQUE ";
            if (index.isSpatial)
                indexType += "SPATIAL ";
            if (index.isFulltext)
                indexType += "FULLTEXT ";
            const indexParser = index.isFulltext && index.parser
                ? ` WITH PARSER ${index.parser}`
                : "";
            upQueries.push(new Query_1.Query(`ALTER TABLE ${this.escapePath(newTable)} DROP INDEX \`${index.name}\`, ADD ${indexType}INDEX \`${newIndexName}\` (${columnNames})${indexParser}`));
            downQueries.push(new Query_1.Query(`ALTER TABLE ${this.escapePath(newTable)} DROP INDEX \`${newIndexName}\`, ADD ${indexType}INDEX \`${index.name}\` (${columnNames})${indexParser}`));
            // replace constraint name
            index.name = newIndexName;
        });
        // rename foreign key constraint
        newTable.foreignKeys.forEach((foreignKey) => {
            const oldForeignKeyName = this.connection.namingStrategy.foreignKeyName(oldTable, foreignKey.columnNames, this.getTablePath(foreignKey), foreignKey.referencedColumnNames);
            // Skip renaming if foreign key has user defined constraint name
            if (foreignKey.name !== oldForeignKeyName)
                return;
            // build new constraint name
            const columnNames = foreignKey.columnNames
                .map((column) => `\`${column}\``)
                .join(", ");
            const referencedColumnNames = foreignKey.referencedColumnNames
                .map((column) => `\`${column}\``)
                .join(",");
            const newForeignKeyName = this.connection.namingStrategy.foreignKeyName(newTable, foreignKey.columnNames, this.getTablePath(foreignKey), foreignKey.referencedColumnNames);
            // build queries
            let up = `ALTER TABLE ${this.escapePath(newTable)} DROP FOREIGN KEY \`${foreignKey.name}\`, ADD CONSTRAINT \`${newForeignKeyName}\` FOREIGN KEY (${columnNames}) ` +
                `REFERENCES ${this.escapePath(this.getTablePath(foreignKey))}(${referencedColumnNames})`;
            if (foreignKey.onDelete)
                up += ` ON DELETE ${foreignKey.onDelete}`;
            if (foreignKey.onUpdate)
                up += ` ON UPDATE ${foreignKey.onUpdate}`;
            let down = `ALTER TABLE ${this.escapePath(newTable)} DROP FOREIGN KEY \`${newForeignKeyName}\`, ADD CONSTRAINT \`${foreignKey.name}\` FOREIGN KEY (${columnNames}) ` +
                `REFERENCES ${this.escapePath(this.getTablePath(foreignKey))}(${referencedColumnNames})`;
            if (foreignKey.onDelete)
                down += ` ON DELETE ${foreignKey.onDelete}`;
            if (foreignKey.onUpdate)
                down += ` ON UPDATE ${foreignKey.onUpdate}`;
            upQueries.push(new Query_1.Query(up));
            downQueries.push(new Query_1.Query(down));
            // replace constraint name
            foreignKey.name = newForeignKeyName;
        });
        await this.executeQueries(upQueries, downQueries);
        // rename old table and replace it in cached tabled;
        oldTable.name = newTable.name;
        this.replaceCachedTable(oldTable, newTable);
    }
    /**
     * Change table comment.
     */
    async changeTableComment(tableOrName, newComment) {
        const upQueries = [];
        const downQueries = [];
        const table = InstanceChecker_1.InstanceChecker.isTable(tableOrName)
            ? tableOrName
            : await this.getCachedTable(tableOrName);
        newComment = this.escapeComment(newComment);
        const comment = this.escapeComment(table.comment);
        if (newComment === comment) {
            return;
        }
        const newTable = table.clone();
        upQueries.push(new Query_1.Query(`ALTER TABLE ${this.escapePath(newTable)} COMMENT ${newComment}`));
        downQueries.push(new Query_1.Query(`ALTER TABLE ${this.escapePath(table)} COMMENT ${comment}`));
        await this.executeQueries(upQueries, downQueries);
        // change table comment and replace it in cached tabled;
        table.comment = newTable.comment;
        this.replaceCachedTable(table, newTable);
    }
    /**
     * Creates a new column from the column in the table.
     */
    async addColumn(tableOrName, column) {
        const table = InstanceChecker_1.InstanceChecker.isTable(tableOrName)
            ? tableOrName
            : await this.getCachedTable(tableOrName);
        const clonedTable = table.clone();
        const upQueries = [];
        const downQueries = [];
        const skipColumnLevelPrimary = clonedTable.primaryColumns.length > 0;
        upQueries.push(new Query_1.Query(`ALTER TABLE ${this.escapePath(table)} ADD ${this.buildCreateColumnSql(column, skipColumnLevelPrimary, false)}`));
        downQueries.push(new Query_1.Query(`ALTER TABLE ${this.escapePath(table)} DROP COLUMN \`${column.name}\``));
        // create or update primary key constraint
        if (column.isPrimary && skipColumnLevelPrimary) {
            // if we already have generated column, we must temporary drop AUTO_INCREMENT property.
            const generatedColumn = clonedTable.columns.find((column) => column.isGenerated &&
                column.generationStrategy === "increment");
            if (generatedColumn) {
                const nonGeneratedColumn = generatedColumn.clone();
                nonGeneratedColumn.isGenerated = false;
                nonGeneratedColumn.generationStrategy = undefined;
                upQueries.push(new Query_1.Query(`ALTER TABLE ${this.escapePath(table)} CHANGE \`${column.name}\` ${this.buildCreateColumnSql(nonGeneratedColumn, true)}`));
                downQueries.push(new Query_1.Query(`ALTER TABLE ${this.escapePath(table)} CHANGE \`${nonGeneratedColumn.name}\` ${this.buildCreateColumnSql(column, true)}`));
            }
            const primaryColumns = clonedTable.primaryColumns;
            let columnNames = primaryColumns
                .map((column) => `\`${column.name}\``)
                .join(", ");
            upQueries.push(new Query_1.Query(`ALTER TABLE ${this.escapePath(table)} DROP PRIMARY KEY`));
            downQueries.push(new Query_1.Query(`ALTER TABLE ${this.escapePath(table)} ADD PRIMARY KEY (${columnNames})`));
            primaryColumns.push(column);
            columnNames = primaryColumns
                .map((column) => `\`${column.name}\``)
                .join(", ");
            upQueries.push(new Query_1.Query(`ALTER TABLE ${this.escapePath(table)} ADD PRIMARY KEY (${columnNames})`));
            downQueries.push(new Query_1.Query(`ALTER TABLE ${this.escapePath(table)} DROP PRIMARY KEY`));
            // if we previously dropped AUTO_INCREMENT property, we must bring it back
            if (generatedColumn) {
                const nonGeneratedColumn = generatedColumn.clone();
                nonGeneratedColumn.isGenerated = false;
                nonGeneratedColumn.generationStrategy = undefined;
                upQueries.push(new Query_1.Query(`ALTER TABLE ${this.escapePath(table)} CHANGE \`${nonGeneratedColumn.name}\` ${this.buildCreateColumnSql(column, true)}`));
                downQueries.push(new Query_1.Query(`ALTER TABLE ${this.escapePath(table)} CHANGE \`${column.name}\` ${this.buildCreateColumnSql(nonGeneratedColumn, true)}`));
            }
        }
        if (column.generatedType && column.asExpression) {
            const currentDatabase = await this.getCurrentDatabase();
            const insertQuery = this.insertTypeormMetadataSql({
                schema: currentDatabase,
                table: table.name,
                type: MetadataTableType_1.MetadataTableType.GENERATED_COLUMN,
                name: column.name,
                value: column.asExpression,
            });
            const deleteQuery = this.deleteTypeormMetadataSql({
                schema: currentDatabase,
                table: table.name,
                type: MetadataTableType_1.MetadataTableType.GENERATED_COLUMN,
                name: column.name,
            });
            upQueries.push(insertQuery);
            downQueries.push(deleteQuery);
        }
        // create column index
        const columnIndex = clonedTable.indices.find((index) => index.columnNames.length === 1 &&
            index.columnNames[0] === column.name);
        if (columnIndex) {
            upQueries.push(this.createIndexSql(table, columnIndex));
            downQueries.push(this.dropIndexSql(table, columnIndex));
        }
        else if (column.isUnique) {
            const uniqueIndex = new TableIndex_1.TableIndex({
                name: this.connection.namingStrategy.indexName(table, [
                    column.name,
                ]),
                columnNames: [column.name],
                isUnique: true,
            });
            clonedTable.indices.push(uniqueIndex);
            clonedTable.uniques.push(new TableUnique_1.TableUnique({
                name: uniqueIndex.name,
                columnNames: uniqueIndex.columnNames,
            }));
            upQueries.push(new Query_1.Query(`ALTER TABLE ${this.escapePath(table)} ADD UNIQUE INDEX \`${uniqueIndex.name}\` (\`${column.name}\`)`));
            downQueries.push(new Query_1.Query(`ALTER TABLE ${this.escapePath(table)} DROP INDEX \`${uniqueIndex.name}\``));
        }
        await this.executeQueries(upQueries, downQueries);
        clonedTable.addColumn(column);
        this.replaceCachedTable(table, clonedTable);
    }
    /**
     * Creates a new columns from the column in the table.
     */
    async addColumns(tableOrName, columns) {
        for (const column of columns) {
            await this.addColumn(tableOrName, column);
        }
    }
    /**
     * Renames column in the given table.
     */
    async renameColumn(tableOrName, oldTableColumnOrName, newTableColumnOrName) {
        const table = InstanceChecker_1.InstanceChecker.isTable(tableOrName)
            ? tableOrName
            : await this.getCachedTable(tableOrName);
        const oldColumn = InstanceChecker_1.InstanceChecker.isTableColumn(oldTableColumnOrName)
            ? oldTableColumnOrName
            : table.columns.find((c) => c.name === oldTableColumnOrName);
        if (!oldColumn)
            throw new error_1.TypeORMError(`Column "${oldTableColumnOrName}" was not found in the "${table.name}" table.`);
        let newColumn = undefined;
        if (InstanceChecker_1.InstanceChecker.isTableColumn(newTableColumnOrName)) {
            newColumn = newTableColumnOrName;
        }
        else {
            newColumn = oldColumn.clone();
            newColumn.name = newTableColumnOrName;
        }
        await this.changeColumn(table, oldColumn, newColumn);
    }
    /**
     * Changes a column in the table.
     */
    async changeColumn(tableOrName, oldColumnOrName, newColumn) {
        const table = InstanceChecker_1.InstanceChecker.isTable(tableOrName)
            ? tableOrName
            : await this.getCachedTable(tableOrName);
        let clonedTable = table.clone();
        const upQueries = [];
        const downQueries = [];
        const oldColumn = InstanceChecker_1.InstanceChecker.isTableColumn(oldColumnOrName)
            ? oldColumnOrName
            : table.columns.find((column) => column.name === oldColumnOrName);
        if (!oldColumn)
            throw new error_1.TypeORMError(`Column "${oldColumnOrName}" was not found in the "${table.name}" table.`);
        if ((newColumn.isGenerated !== oldColumn.isGenerated &&
            newColumn.generationStrategy !== "uuid") ||
            oldColumn.type !== newColumn.type ||
            oldColumn.length !== newColumn.length ||
            (oldColumn.generatedType &&
                newColumn.generatedType &&
                oldColumn.generatedType !== newColumn.generatedType) ||
            (!oldColumn.generatedType &&
                newColumn.generatedType === "VIRTUAL") ||
            (oldColumn.generatedType === "VIRTUAL" && !newColumn.generatedType)) {
            await this.dropColumn(table, oldColumn);
            await this.addColumn(table, newColumn);
            // update cloned table
            clonedTable = table.clone();
        }
        else {
            if (newColumn.name !== oldColumn.name) {
                // We don't change any column properties, just rename it.
                upQueries.push(new Query_1.Query(`ALTER TABLE ${this.escapePath(table)} CHANGE \`${oldColumn.name}\` \`${newColumn.name}\` ${this.buildCreateColumnSql(oldColumn, true, true)}`));
                downQueries.push(new Query_1.Query(`ALTER TABLE ${this.escapePath(table)} CHANGE \`${newColumn.name}\` \`${oldColumn.name}\` ${this.buildCreateColumnSql(oldColumn, true, true)}`));
                // rename index constraints
                clonedTable.findColumnIndices(oldColumn).forEach((index) => {
                    const oldUniqueName = this.connection.namingStrategy.indexName(clonedTable, index.columnNames);
                    // Skip renaming if Index has user defined constraint name
                    if (index.name !== oldUniqueName)
                        return;
                    // build new constraint name
                    index.columnNames.splice(index.columnNames.indexOf(oldColumn.name), 1);
                    index.columnNames.push(newColumn.name);
                    const columnNames = index.columnNames
                        .map((column) => `\`${column}\``)
                        .join(", ");
                    const newIndexName = this.connection.namingStrategy.indexName(clonedTable, index.columnNames, index.where);
                    // build queries
                    let indexType = "";
                    if (index.isUnique)
                        indexType += "UNIQUE ";
                    if (index.isSpatial)
                        indexType += "SPATIAL ";
                    if (index.isFulltext)
                        indexType += "FULLTEXT ";
                    const indexParser = index.isFulltext && index.parser
                        ? ` WITH PARSER ${index.parser}`
                        : "";
                    upQueries.push(new Query_1.Query(`ALTER TABLE ${this.escapePath(table)} DROP INDEX \`${index.name}\`, ADD ${indexType}INDEX \`${newIndexName}\` (${columnNames})${indexParser}`));
                    downQueries.push(new Query_1.Query(`ALTER TABLE ${this.escapePath(table)} DROP INDEX \`${newIndexName}\`, ADD ${indexType}INDEX \`${index.name}\` (${columnNames})${indexParser}`));
                    // replace constraint name
                    index.name = newIndexName;
                });
                // rename foreign key constraints
                clonedTable
                    .findColumnForeignKeys(oldColumn)
                    .forEach((foreignKey) => {
                    const foreignKeyName = this.connection.namingStrategy.foreignKeyName(clonedTable, foreignKey.columnNames, this.getTablePath(foreignKey), foreignKey.referencedColumnNames);
                    // Skip renaming if foreign key has user defined constraint name
                    if (foreignKey.name !== foreignKeyName)
                        return;
                    // build new constraint name
                    foreignKey.columnNames.splice(foreignKey.columnNames.indexOf(oldColumn.name), 1);
                    foreignKey.columnNames.push(newColumn.name);
                    const columnNames = foreignKey.columnNames
                        .map((column) => `\`${column}\``)
                        .join(", ");
                    const referencedColumnNames = foreignKey.referencedColumnNames
                        .map((column) => `\`${column}\``)
                        .join(",");
                    const newForeignKeyName = this.connection.namingStrategy.foreignKeyName(clonedTable, foreignKey.columnNames, this.getTablePath(foreignKey), foreignKey.referencedColumnNames);
                    // build queries
                    let up = `ALTER TABLE ${this.escapePath(table)} DROP FOREIGN KEY \`${foreignKey.name}\`, ADD CONSTRAINT \`${newForeignKeyName}\` FOREIGN KEY (${columnNames}) ` +
                        `REFERENCES ${this.escapePath(this.getTablePath(foreignKey))}(${referencedColumnNames})`;
                    if (foreignKey.onDelete)
                        up += ` ON DELETE ${foreignKey.onDelete}`;
                    if (foreignKey.onUpdate)
                        up += ` ON UPDATE ${foreignKey.onUpdate}`;
                    let down = `ALTER TABLE ${this.escapePath(table)} DROP FOREIGN KEY \`${newForeignKeyName}\`, ADD CONSTRAINT \`${foreignKey.name}\` FOREIGN KEY (${columnNames}) ` +
                        `REFERENCES ${this.escapePath(this.getTablePath(foreignKey))}(${referencedColumnNames})`;
                    if (foreignKey.onDelete)
                        down += ` ON DELETE ${foreignKey.onDelete}`;
                    if (foreignKey.onUpdate)
                        down += ` ON UPDATE ${foreignKey.onUpdate}`;
                    upQueries.push(new Query_1.Query(up));
                    downQueries.push(new Query_1.Query(down));
                    // replace constraint name
                    foreignKey.name = newForeignKeyName;
                });
                // rename old column in the Table object
                const oldTableColumn = clonedTable.columns.find((column) => column.name === oldColumn.name);
                clonedTable.columns[clonedTable.columns.indexOf(oldTableColumn)].name = newColumn.name;
                oldColumn.name = newColumn.name;
            }
            if (this.isColumnChanged(oldColumn, newColumn, true, true)) {
                upQueries.push(new Query_1.Query(`ALTER TABLE ${this.escapePath(table)} CHANGE \`${oldColumn.name}\` ${this.buildCreateColumnSql(newColumn, true)}`));
                downQueries.push(new Query_1.Query(`ALTER TABLE ${this.escapePath(table)} CHANGE \`${newColumn.name}\` ${this.buildCreateColumnSql(oldColumn, true)}`));
                if (oldColumn.generatedType && !newColumn.generatedType) {
                    // if column changed from generated to non-generated, delete record from typeorm metadata
                    const currentDatabase = await this.getCurrentDatabase();
                    const deleteQuery = this.deleteTypeormMetadataSql({
                        schema: currentDatabase,
                        table: table.name,
                        type: MetadataTableType_1.MetadataTableType.GENERATED_COLUMN,
                        name: oldColumn.name,
                    });
                    const insertQuery = this.insertTypeormMetadataSql({
                        schema: currentDatabase,
                        table: table.name,
                        type: MetadataTableType_1.MetadataTableType.GENERATED_COLUMN,
                        name: oldColumn.name,
                        value: oldColumn.asExpression,
                    });
                    upQueries.push(deleteQuery);
                    downQueries.push(insertQuery);
                }
                else if (!oldColumn.generatedType &&
                    newColumn.generatedType) {
                    // if column changed from non-generated to generated, insert record into typeorm metadata
                    const currentDatabase = await this.getCurrentDatabase();
                    const insertQuery = this.insertTypeormMetadataSql({
                        schema: currentDatabase,
                        table: table.name,
                        type: MetadataTableType_1.MetadataTableType.GENERATED_COLUMN,
                        name: newColumn.name,
                        value: newColumn.asExpression,
                    });
                    const deleteQuery = this.deleteTypeormMetadataSql({
                        schema: currentDatabase,
                        table: table.name,
                        type: MetadataTableType_1.MetadataTableType.GENERATED_COLUMN,
                        name: newColumn.name,
                    });
                    upQueries.push(insertQuery);
                    downQueries.push(deleteQuery);
                }
                else if (oldColumn.asExpression !== newColumn.asExpression) {
                    // if only expression changed, just update it in typeorm_metadata table
                    const currentDatabase = await this.getCurrentDatabase();
                    const updateQuery = this.connection
                        .createQueryBuilder()
                        .update(this.getTypeormMetadataTableName())
                        .set({ value: newColumn.asExpression })
                        .where("`type` = :type", {
                        type: MetadataTableType_1.MetadataTableType.GENERATED_COLUMN,
                    })
                        .andWhere("`name` = :name", { name: oldColumn.name })
                        .andWhere("`schema` = :schema", {
                        schema: currentDatabase,
                    })
                        .andWhere("`table` = :table", { table: table.name })
                        .getQueryAndParameters();
                    const revertUpdateQuery = this.connection
                        .createQueryBuilder()
                        .update(this.getTypeormMetadataTableName())
                        .set({ value: oldColumn.asExpression })
                        .where("`type` = :type", {
                        type: MetadataTableType_1.MetadataTableType.GENERATED_COLUMN,
                    })
                        .andWhere("`name` = :name", { name: newColumn.name })
                        .andWhere("`schema` = :schema", {
                        schema: currentDatabase,
                    })
                        .andWhere("`table` = :table", { table: table.name })
                        .getQueryAndParameters();
                    upQueries.push(new Query_1.Query(updateQuery[0], updateQuery[1]));
                    downQueries.push(new Query_1.Query(revertUpdateQuery[0], revertUpdateQuery[1]));
                }
            }
            if (newColumn.isPrimary !== oldColumn.isPrimary) {
                // if table have generated column, we must drop AUTO_INCREMENT before changing primary constraints.
                const generatedColumn = clonedTable.columns.find((column) => column.isGenerated &&
                    column.generationStrategy === "increment");
                if (generatedColumn) {
                    const nonGeneratedColumn = generatedColumn.clone();
                    nonGeneratedColumn.isGenerated = false;
                    nonGeneratedColumn.generationStrategy = undefined;
                    upQueries.push(new Query_1.Query(`ALTER TABLE ${this.escapePath(table)} CHANGE \`${generatedColumn.name}\` ${this.buildCreateColumnSql(nonGeneratedColumn, true)}`));
                    downQueries.push(new Query_1.Query(`ALTER TABLE ${this.escapePath(table)} CHANGE \`${nonGeneratedColumn.name}\` ${this.buildCreateColumnSql(generatedColumn, true)}`));
                }
                const primaryColumns = clonedTable.primaryColumns;
                // if primary column state changed, we must always drop existed constraint.
                if (primaryColumns.length > 0) {
                    const columnNames = primaryColumns
                        .map((column) => `\`${column.name}\``)
                        .join(", ");
                    upQueries.push(new Query_1.Query(`ALTER TABLE ${this.escapePath(table)} DROP PRIMARY KEY`));
                    downQueries.push(new Query_1.Query(`ALTER TABLE ${this.escapePath(table)} ADD PRIMARY KEY (${columnNames})`));
                }
                if (newColumn.isPrimary === true) {
                    primaryColumns.push(newColumn);
                    // update column in table
                    const column = clonedTable.columns.find((column) => column.name === newColumn.name);
                    column.isPrimary = true;
                    const columnNames = primaryColumns
                        .map((column) => `\`${column.name}\``)
                        .join(", ");
                    upQueries.push(new Query_1.Query(`ALTER TABLE ${this.escapePath(table)} ADD PRIMARY KEY (${columnNames})`));
                    downQueries.push(new Query_1.Query(`ALTER TABLE ${this.escapePath(table)} DROP PRIMARY KEY`));
                }
                else {
                    const primaryColumn = primaryColumns.find((c) => c.name === newColumn.name);
                    primaryColumns.splice(primaryColumns.indexOf(primaryColumn), 1);
                    // update column in table
                    const column = clonedTable.columns.find((column) => column.name === newColumn.name);
                    column.isPrimary = false;
                    // if we have another primary keys, we must recreate constraint.
                    if (primaryColumns.length > 0) {
                        const columnNames = primaryColumns
                            .map((column) => `\`${column.name}\``)
                            .join(", ");
                        upQueries.push(new Query_1.Query(`ALTER TABLE ${this.escapePath(table)} ADD PRIMARY KEY (${columnNames})`));
                        downQueries.push(new Query_1.Query(`ALTER TABLE ${this.escapePath(table)} DROP PRIMARY KEY`));
                    }
                }
                // if we have generated column, and we dropped AUTO_INCREMENT property before, we must bring it back
                if (generatedColumn) {
                    const nonGeneratedColumn = generatedColumn.clone();
                    nonGeneratedColumn.isGenerated = false;
                    nonGeneratedColumn.generationStrategy = undefined;
                    upQueries.push(new Query_1.Query(`ALTER TABLE ${this.escapePath(table)} CHANGE \`${nonGeneratedColumn.name}\` ${this.buildCreateColumnSql(generatedColumn, true)}`));
                    downQueries.push(new Query_1.Query(`ALTER TABLE ${this.escapePath(table)} CHANGE \`${generatedColumn.name}\` ${this.buildCreateColumnSql(nonGeneratedColumn, true)}`));
                }
            }
            if (newColumn.isUnique !== oldColumn.isUnique) {
                if (newColumn.isUnique === true) {
                    const uniqueIndex = new TableIndex_1.TableIndex({
                        name: this.connection.namingStrategy.indexName(table, [
                            newColumn.name,
                        ]),
                        columnNames: [newColumn.name],
                        isUnique: true,
                    });
                    clonedTable.indices.push(uniqueIndex);
                    clonedTable.uniques.push(new TableUnique_1.TableUnique({
                        name: uniqueIndex.name,
                        columnNames: uniqueIndex.columnNames,
                    }));
                    upQueries.push(new Query_1.Query(`ALTER TABLE ${this.escapePath(table)} ADD UNIQUE INDEX \`${uniqueIndex.name}\` (\`${newColumn.name}\`)`));
                    downQueries.push(new Query_1.Query(`ALTER TABLE ${this.escapePath(table)} DROP INDEX \`${uniqueIndex.name}\``));
                }
                else {
                    const uniqueIndex = clonedTable.indices.find((index) => {
                        return (index.columnNames.length === 1 &&
                            index.isUnique === true &&
                            !!index.columnNames.find((columnName) => columnName === newColumn.name));
                    });
                    clonedTable.indices.splice(clonedTable.indices.indexOf(uniqueIndex), 1);
                    const tableUnique = clonedTable.uniques.find((unique) => unique.name === uniqueIndex.name);
                    clonedTable.uniques.splice(clonedTable.uniques.indexOf(tableUnique), 1);
                    upQueries.push(new Query_1.Query(`ALTER TABLE ${this.escapePath(table)} DROP INDEX \`${uniqueIndex.name}\``));
                    downQueries.push(new Query_1.Query(`ALTER TABLE ${this.escapePath(table)} ADD UNIQUE INDEX \`${uniqueIndex.name}\` (\`${newColumn.name}\`)`));
                }
            }
        }
        await this.executeQueries(upQueries, downQueries);
        this.replaceCachedTable(table, clonedTable);
    }
    /**
     * Changes a column in the table.
     */
    async changeColumns(tableOrName, changedColumns) {
        for (const { oldColumn, newColumn } of changedColumns) {
            await this.changeColumn(tableOrName, oldColumn, newColumn);
        }
    }
    /**
     * Drops column in the table.
     */
    async dropColumn(tableOrName, columnOrName) {
        const table = InstanceChecker_1.InstanceChecker.isTable(tableOrName)
            ? tableOrName
            : await this.getCachedTable(tableOrName);
        const column = InstanceChecker_1.InstanceChecker.isTableColumn(columnOrName)
            ? columnOrName
            : table.findColumnByName(columnOrName);
        if (!column)
            throw new error_1.TypeORMError(`Column "${columnOrName}" was not found in table "${table.name}"`);
        const clonedTable = table.clone();
        const upQueries = [];
        const downQueries = [];
        // drop primary key constraint
        if (column.isPrimary) {
            // if table have generated column, we must drop AUTO_INCREMENT before changing primary constraints.
            const generatedColumn = clonedTable.columns.find((column) => column.isGenerated &&
                column.generationStrategy === "increment");
            if (generatedColumn) {
                const nonGeneratedColumn = generatedColumn.clone();
                nonGeneratedColumn.isGenerated = false;
                nonGeneratedColumn.generationStrategy = undefined;
                upQueries.push(new Query_1.Query(`ALTER TABLE ${this.escapePath(table)} CHANGE \`${generatedColumn.name}\` ${this.buildCreateColumnSql(nonGeneratedColumn, true)}`));
                downQueries.push(new Query_1.Query(`ALTER TABLE ${this.escapePath(table)} CHANGE \`${nonGeneratedColumn.name}\` ${this.buildCreateColumnSql(generatedColumn, true)}`));
            }
            // dropping primary key constraint
            const columnNames = clonedTable.primaryColumns
                .map((primaryColumn) => `\`${primaryColumn.name}\``)
                .join(", ");
            upQueries.push(new Query_1.Query(`ALTER TABLE ${this.escapePath(clonedTable)} DROP PRIMARY KEY`));
            downQueries.push(new Query_1.Query(`ALTER TABLE ${this.escapePath(clonedTable)} ADD PRIMARY KEY (${columnNames})`));
            // update column in table
            const tableColumn = clonedTable.findColumnByName(column.name);
            tableColumn.isPrimary = false;
            // if primary key have multiple columns, we must recreate it without dropped column
            if (clonedTable.primaryColumns.length > 0) {
                const columnNames = clonedTable.primaryColumns
                    .map((primaryColumn) => `\`${primaryColumn.name}\``)
                    .join(", ");
                upQueries.push(new Query_1.Query(`ALTER TABLE ${this.escapePath(clonedTable)} ADD PRIMARY KEY (${columnNames})`));
                downQueries.push(new Query_1.Query(`ALTER TABLE ${this.escapePath(clonedTable)} DROP PRIMARY KEY`));
            }
            // if we have generated column, and we dropped AUTO_INCREMENT property before, and this column is not current dropping column, we must bring it back
            if (generatedColumn && generatedColumn.name !== column.name) {
                const nonGeneratedColumn = generatedColumn.clone();
                nonGeneratedColumn.isGenerated = false;
                nonGeneratedColumn.generationStrategy = undefined;
                upQueries.push(new Query_1.Query(`ALTER TABLE ${this.escapePath(table)} CHANGE \`${nonGeneratedColumn.name}\` ${this.buildCreateColumnSql(generatedColumn, true)}`));
                downQueries.push(new Query_1.Query(`ALTER TABLE ${this.escapePath(table)} CHANGE \`${generatedColumn.name}\` ${this.buildCreateColumnSql(nonGeneratedColumn, true)}`));
            }
        }
        // drop column index
        const columnIndex = clonedTable.indices.find((index) => index.columnNames.length === 1 &&
            index.columnNames[0] === column.name);
        if (columnIndex) {
            clonedTable.indices.splice(clonedTable.indices.indexOf(columnIndex), 1);
            upQueries.push(this.dropIndexSql(table, columnIndex));
            downQueries.push(this.createIndexSql(table, columnIndex));
        }
        else if (column.isUnique) {
            // we splice constraints both from table uniques and indices.
            const uniqueName = this.connection.namingStrategy.uniqueConstraintName(table, [
                column.name,
            ]);
            const foundUnique = clonedTable.uniques.find((unique) => unique.name === uniqueName);
            if (foundUnique)
                clonedTable.uniques.splice(clonedTable.uniques.indexOf(foundUnique), 1);
            const indexName = this.connection.namingStrategy.indexName(table, [
                column.name,
            ]);
            const foundIndex = clonedTable.indices.find((index) => index.name === indexName);
            if (foundIndex)
                clonedTable.indices.splice(clonedTable.indices.indexOf(foundIndex), 1);
            upQueries.push(new Query_1.Query(`ALTER TABLE ${this.escapePath(table)} DROP INDEX \`${indexName}\``));
            downQueries.push(new Query_1.Query(`ALTER TABLE ${this.escapePath(table)} ADD UNIQUE INDEX \`${indexName}\` (\`${column.name}\`)`));
        }
        upQueries.push(new Query_1.Query(`ALTER TABLE ${this.escapePath(table)} DROP COLUMN \`${column.name}\``));
        downQueries.push(new Query_1.Query(`ALTER TABLE ${this.escapePath(table)} ADD ${this.buildCreateColumnSql(column, true)}`));
        if (column.generatedType && column.asExpression) {
            const currentDatabase = await this.getCurrentDatabase();
            const deleteQuery = this.deleteTypeormMetadataSql({
                schema: currentDatabase,
                table: table.name,
                type: MetadataTableType_1.MetadataTableType.GENERATED_COLUMN,
                name: column.name,
            });
            const insertQuery = this.insertTypeormMetadataSql({
                schema: currentDatabase,
                table: table.name,
                type: MetadataTableType_1.MetadataTableType.GENERATED_COLUMN,
                name: column.name,
                value: column.asExpression,
            });
            upQueries.push(deleteQuery);
            downQueries.push(insertQuery);
        }
        await this.executeQueries(upQueries, downQueries);
        clonedTable.removeColumn(column);
        this.replaceCachedTable(table, clonedTable);
    }
    /**
     * Drops the columns in the table.
     */
    async dropColumns(tableOrName, columns) {
        for (const column of [...columns]) {
            await this.dropColumn(tableOrName, column);
        }
    }
    /**
     * Creates a new primary key.
     */
    async createPrimaryKey(tableOrName, columnNames) {
        const table = InstanceChecker_1.InstanceChecker.isTable(tableOrName)
            ? tableOrName
            : await this.getCachedTable(tableOrName);
        const clonedTable = table.clone();
        const up = this.createPrimaryKeySql(table, columnNames);
        const down = this.dropPrimaryKeySql(table);
        await this.executeQueries(up, down);
        clonedTable.columns.forEach((column) => {
            if (columnNames.find((columnName) => columnName === column.name))
                column.isPrimary = true;
        });
        this.replaceCachedTable(table, clonedTable);
    }
    /**
     * Updates composite primary keys.
     */
    async updatePrimaryKeys(tableOrName, columns) {
        const table = InstanceChecker_1.InstanceChecker.isTable(tableOrName)
            ? tableOrName
            : await this.getCachedTable(tableOrName);
        const clonedTable = table.clone();
        const columnNames = columns.map((column) => column.name);
        const upQueries = [];
        const downQueries = [];
        // if table have generated column, we must drop AUTO_INCREMENT before changing primary constraints.
        const generatedColumn = clonedTable.columns.find((column) => column.isGenerated && column.generationStrategy === "increment");
        if (generatedColumn) {
            const nonGeneratedColumn = generatedColumn.clone();
            nonGeneratedColumn.isGenerated = false;
            nonGeneratedColumn.generationStrategy = undefined;
            upQueries.push(new Query_1.Query(`ALTER TABLE ${this.escapePath(table)} CHANGE \`${generatedColumn.name}\` ${this.buildCreateColumnSql(nonGeneratedColumn, true)}`));
            downQueries.push(new Query_1.Query(`ALTER TABLE ${this.escapePath(table)} CHANGE \`${nonGeneratedColumn.name}\` ${this.buildCreateColumnSql(generatedColumn, true)}`));
        }
        // if table already have primary columns, we must drop them.
        const primaryColumns = clonedTable.primaryColumns;
        if (primaryColumns.length > 0) {
            const columnNames = primaryColumns
                .map((column) => `\`${column.name}\``)
                .join(", ");
            upQueries.push(new Query_1.Query(`ALTER TABLE ${this.escapePath(table)} DROP PRIMARY KEY`));
            downQueries.push(new Query_1.Query(`ALTER TABLE ${this.escapePath(table)} ADD PRIMARY KEY (${columnNames})`));
        }
        // update columns in table.
        clonedTable.columns
            .filter((column) => columnNames.indexOf(column.name) !== -1)
            .forEach((column) => (column.isPrimary = true));
        const columnNamesString = columnNames
            .map((columnName) => `\`${columnName}\``)
            .join(", ");
        upQueries.push(new Query_1.Query(`ALTER TABLE ${this.escapePath(table)} ADD PRIMARY KEY (${columnNamesString})`));
        downQueries.push(new Query_1.Query(`ALTER TABLE ${this.escapePath(table)} DROP PRIMARY KEY`));
        // if we already have generated column or column is changed to generated, and we dropped AUTO_INCREMENT property before, we must bring it back
        const newOrExistGeneratedColumn = generatedColumn
            ? generatedColumn
            : columns.find((column) => column.isGenerated &&
                column.generationStrategy === "increment");
        if (newOrExistGeneratedColumn) {
            const nonGeneratedColumn = newOrExistGeneratedColumn.clone();
            nonGeneratedColumn.isGenerated = false;
            nonGeneratedColumn.generationStrategy = undefined;
            upQueries.push(new Query_1.Query(`ALTER TABLE ${this.escapePath(table)} CHANGE \`${nonGeneratedColumn.name}\` ${this.buildCreateColumnSql(newOrExistGeneratedColumn, true)}`));
            downQueries.push(new Query_1.Query(`ALTER TABLE ${this.escapePath(table)} CHANGE \`${newOrExistGeneratedColumn.name}\` ${this.buildCreateColumnSql(nonGeneratedColumn, true)}`));
            // if column changed to generated, we must update it in table
            const changedGeneratedColumn = clonedTable.columns.find((column) => column.name === newOrExistGeneratedColumn.name);
            changedGeneratedColumn.isGenerated = true;
            changedGeneratedColumn.generationStrategy = "increment";
        }
        await this.executeQueries(upQueries, downQueries);
        this.replaceCachedTable(table, clonedTable);
    }
    /**
     * Drops a primary key.
     */
    async dropPrimaryKey(tableOrName) {
        const table = InstanceChecker_1.InstanceChecker.isTable(tableOrName)
            ? tableOrName
            : await this.getCachedTable(tableOrName);
        const up = this.dropPrimaryKeySql(table);
        const down = this.createPrimaryKeySql(table, table.primaryColumns.map((column) => column.name));
        await this.executeQueries(up, down);
        table.primaryColumns.forEach((column) => {
            column.isPrimary = false;
        });
    }
    /**
     * Creates a new unique constraint.
     */
    async createUniqueConstraint(tableOrName, uniqueConstraint) {
        throw new error_1.TypeORMError(`MySql does not support unique constraints. Use unique index instead.`);
    }
    /**
     * Creates a new unique constraints.
     */
    async createUniqueConstraints(tableOrName, uniqueConstraints) {
        throw new error_1.TypeORMError(`MySql does not support unique constraints. Use unique index instead.`);
    }
    /**
     * Drops a unique constraint.
     */
    async dropUniqueConstraint(tableOrName, uniqueOrName) {
        throw new error_1.TypeORMError(`MySql does not support unique constraints. Use unique index instead.`);
    }
    /**
     * Drops a unique constraints.
     */
    async dropUniqueConstraints(tableOrName, uniqueConstraints) {
        throw new error_1.TypeORMError(`MySql does not support unique constraints. Use unique index instead.`);
    }
    /**
     * Creates a new check constraint.
     */
    async createCheckConstraint(tableOrName, checkConstraint) {
        throw new error_1.TypeORMError(`MySql does not support check constraints.`);
    }
    /**
     * Creates a new check constraints.
     */
    async createCheckConstraints(tableOrName, checkConstraints) {
        throw new error_1.TypeORMError(`MySql does not support check constraints.`);
    }
    /**
     * Drops check constraint.
     */
    async dropCheckConstraint(tableOrName, checkOrName) {
        throw new error_1.TypeORMError(`MySql does not support check constraints.`);
    }
    /**
     * Drops check constraints.
     */
    async dropCheckConstraints(tableOrName, checkConstraints) {
        throw new error_1.TypeORMError(`MySql does not support check constraints.`);
    }
    /**
     * Creates a new exclusion constraint.
     */
    async createExclusionConstraint(tableOrName, exclusionConstraint) {
        throw new error_1.TypeORMError(`MySql does not support exclusion constraints.`);
    }
    /**
     * Creates a new exclusion constraints.
     */
    async createExclusionConstraints(tableOrName, exclusionConstraints) {
        throw new error_1.TypeORMError(`MySql does not support exclusion constraints.`);
    }
    /**
     * Drops exclusion constraint.
     */
    async dropExclusionConstraint(tableOrName, exclusionOrName) {
        throw new error_1.TypeORMError(`MySql does not support exclusion constraints.`);
    }
    /**
     * Drops exclusion constraints.
     */
    async dropExclusionConstraints(tableOrName, exclusionConstraints) {
        throw new error_1.TypeORMError(`MySql does not support exclusion constraints.`);
    }
    /**
     * Creates a new foreign key.
     */
    async createForeignKey(tableOrName, foreignKey) {
        const table = InstanceChecker_1.InstanceChecker.isTable(tableOrName)
            ? tableOrName
            : await this.getCachedTable(tableOrName);
        // new FK may be passed without name. In this case we generate FK name manually.
        if (!foreignKey.name)
            foreignKey.name = this.connection.namingStrategy.foreignKeyName(table, foreignKey.columnNames, this.getTablePath(foreignKey), foreignKey.referencedColumnNames);
        const up = this.createForeignKeySql(table, foreignKey);
        const down = this.dropForeignKeySql(table, foreignKey);
        await this.executeQueries(up, down);
        table.addForeignKey(foreignKey);
    }
    /**
     * Creates a new foreign keys.
     */
    async createForeignKeys(tableOrName, foreignKeys) {
        const promises = foreignKeys.map((foreignKey) => this.createForeignKey(tableOrName, foreignKey));
        await Promise.all(promises);
    }
    /**
     * Drops a foreign key.
     */
    async dropForeignKey(tableOrName, foreignKeyOrName) {
        const table = InstanceChecker_1.InstanceChecker.isTable(tableOrName)
            ? tableOrName
            : await this.getCachedTable(tableOrName);
        const foreignKey = InstanceChecker_1.InstanceChecker.isTableForeignKey(foreignKeyOrName)
            ? foreignKeyOrName
            : table.foreignKeys.find((fk) => fk.name === foreignKeyOrName);
        if (!foreignKey)
            throw new error_1.TypeORMError(`Supplied foreign key was not found in table ${table.name}`);
        const up = this.dropForeignKeySql(table, foreignKey);
        const down = this.createForeignKeySql(table, foreignKey);
        await this.executeQueries(up, down);
        table.removeForeignKey(foreignKey);
    }
    /**
     * Drops a foreign keys from the table.
     */
    async dropForeignKeys(tableOrName, foreignKeys) {
        const promises = foreignKeys.map((foreignKey) => this.dropForeignKey(tableOrName, foreignKey));
        await Promise.all(promises);
    }
    /**
     * Creates a new index.
     */
    async createIndex(tableOrName, index) {
        const table = InstanceChecker_1.InstanceChecker.isTable(tableOrName)
            ? tableOrName
            : await this.getCachedTable(tableOrName);
        // new index may be passed without name. In this case we generate index name manually.
        if (!index.name)
            index.name = this.generateIndexName(table, index);
        const up = this.createIndexSql(table, index);
        const down = this.dropIndexSql(table, index);
        await this.executeQueries(up, down);
        table.addIndex(index, true);
    }
    /**
     * Creates a new indices
     */
    async createIndices(tableOrName, indices) {
        const promises = indices.map((index) => this.createIndex(tableOrName, index));
        await Promise.all(promises);
    }
    /**
     * Drops an index.
     */
    async dropIndex(tableOrName, indexOrName) {
        const table = InstanceChecker_1.InstanceChecker.isTable(tableOrName)
            ? tableOrName
            : await this.getCachedTable(tableOrName);
        const index = InstanceChecker_1.InstanceChecker.isTableIndex(indexOrName)
            ? indexOrName
            : table.indices.find((i) => i.name === indexOrName);
        if (!index)
            throw new error_1.TypeORMError(`Supplied index ${indexOrName} was not found in table ${table.name}`);
        // old index may be passed without name. In this case we generate index name manually.
        if (!index.name)
            index.name = this.generateIndexName(table, index);
        const up = this.dropIndexSql(table, index);
        const down = this.createIndexSql(table, index);
        await this.executeQueries(up, down);
        table.removeIndex(index, true);
    }
    /**
     * Drops an indices from the table.
     */
    async dropIndices(tableOrName, indices) {
        const promises = indices.map((index) => this.dropIndex(tableOrName, index));
        await Promise.all(promises);
    }
    /**
     * Clears all table contents.
     * Note: this operation uses SQL's TRUNCATE query which cannot be reverted in transactions.
     */
    async clearTable(tableOrName) {
        await this.query(`TRUNCATE TABLE ${this.escapePath(tableOrName)}`);
    }
    /**
     * Removes all tables from the currently connected database.
     * Be careful using this method and avoid using it in production or migrations
     * (because it can clear all your database).
     */
    async clearDatabase(database) {
        const dbName = database ? database : this.driver.database;
        if (dbName) {
            const isDatabaseExist = await this.hasDatabase(dbName);
            if (!isDatabaseExist)
                return Promise.resolve();
        }
        else {
            throw new error_1.TypeORMError(`Can not clear database. No database is specified`);
        }
        const isAnotherTransactionActive = this.isTransactionActive;
        if (!isAnotherTransactionActive)
            await this.startTransaction();
        try {
            const selectViewDropsQuery = `SELECT concat('DROP VIEW IF EXISTS \`', table_schema, '\`.\`', table_name, '\`') AS \`query\` FROM \`INFORMATION_SCHEMA\`.\`VIEWS\` WHERE \`TABLE_SCHEMA\` = '${dbName}'`;
            const dropViewQueries = await this.query(selectViewDropsQuery);
            await Promise.all(dropViewQueries.map((q) => this.query(q["query"])));
            const disableForeignKeysCheckQuery = `SET FOREIGN_KEY_CHECKS = 0;`;
            const dropTablesQuery = `SELECT concat('DROP TABLE IF EXISTS \`', table_schema, '\`.\`', table_name, '\`') AS \`query\` FROM \`INFORMATION_SCHEMA\`.\`TABLES\` WHERE \`TABLE_SCHEMA\` = '${dbName}'`;
            const enableForeignKeysCheckQuery = `SET FOREIGN_KEY_CHECKS = 1;`;
            await this.query(disableForeignKeysCheckQuery);
            const dropQueries = await this.query(dropTablesQuery);
            await Promise.all(dropQueries.map((query) => this.query(query["query"])));
            await this.query(enableForeignKeysCheckQuery);
            if (!isAnotherTransactionActive)
                await this.commitTransaction();
        }
        catch (error) {
            try {
                // we throw original error even if rollback thrown an error
                if (!isAnotherTransactionActive)
                    await this.rollbackTransaction();
            }
            catch (rollbackError) { }
            throw error;
        }
    }
    // -------------------------------------------------------------------------
    // Protected Methods
    // -------------------------------------------------------------------------
    async loadViews(viewNames) {
        const hasTable = await this.hasTable(this.getTypeormMetadataTableName());
        if (!hasTable) {
            return [];
        }
        if (!viewNames) {
            viewNames = [];
        }
        const currentDatabase = await this.getCurrentDatabase();
        const viewsCondition = viewNames
            .map((tableName) => {
            let { database, tableName: name } = this.driver.parseTableName(tableName);
            if (!database) {
                database = currentDatabase;
            }
            return `(\`t\`.\`schema\` = '${database}' AND \`t\`.\`name\` = '${name}')`;
        })
            .join(" OR ");
        const query = `SELECT \`t\`.*, \`v\`.\`check_option\` FROM ${this.escapePath(this.getTypeormMetadataTableName())} \`t\` ` +
            `INNER JOIN \`information_schema\`.\`views\` \`v\` ON \`v\`.\`table_schema\` = \`t\`.\`schema\` AND \`v\`.\`table_name\` = \`t\`.\`name\` WHERE \`t\`.\`type\` = '${MetadataTableType_1.MetadataTableType.VIEW}' ${viewsCondition ? `AND (${viewsCondition})` : ""}`;
        const dbViews = await this.query(query);
        return dbViews.map((dbView) => {
            const view = new View_1.View();
            const db = dbView["schema"] === currentDatabase
                ? undefined
                : dbView["schema"];
            view.database = dbView["schema"];
            view.name = this.driver.buildTableName(dbView["name"], undefined, db);
            view.expression = dbView["value"];
            return view;
        });
    }
    /**
     * Loads all tables (with given names) from the database and creates a Table from them.
     */
    async loadTables(tableNames) {
        if (tableNames && tableNames.length === 0) {
            return [];
        }
        const currentDatabase = await this.getCurrentDatabase();
        // The following SQL brought to you by:
        //   A terrible understanding of https://dev.mysql.com/doc/refman/8.0/en/information-schema-optimization.html
        //
        // Short Version:
        // INFORMATION_SCHEMA is a weird metadata virtual table and follows VERY FEW of the normal
        // query optimization rules.  Depending on the columns you query against & the columns you're SELECTing
        // there can be a drastically different query performance - this is because the tables map to
        // data on the disk and some pieces of data require a scan of the data directory, the database files, etc
        // With most of these, you'll want to do an `EXPLAIN` when making changes to make sure
        // the changes you're making aren't changing the query performance profile negatively
        // When you do the explain you'll want to look at the `Extra` field -
        // It will look something like: "Using where; {FILE_OPENING}; Scanned {DB_NUM} databases"
        // FILE_OPENING will commonly be OPEN_FRM_ONLY or OPEN_FULL_TABLE - you want to aim to NOT do
        // an OPEN_FULL_TABLE unless necessary. DB_NUM may be a number or "all" - you really want to
        // keep this to 0 or 1.  Ideally 0. "All" means you've scanned all databases - not good.
        //
        // For more info, see the above link to the MySQL docs.
        //
        // Something not noted in the docs is that complex `WHERE` clauses - such as `OR` expressions -
        // will cause the query to not hit the optimizations & do full scans.  This is why
        // a number of queries below do `UNION`s of single `WHERE` clauses.
        const dbTables = [];
        if (!tableNames) {
            // Since we don't have any of this data we have to do a scan
            const tablesSql = `SELECT \`TABLE_SCHEMA\`, \`TABLE_NAME\`, \`TABLE_COMMENT\` FROM \`INFORMATION_SCHEMA\`.\`TABLES\``;
            dbTables.push(...(await this.query(tablesSql)));
        }
        else {
            // Avoid data directory scan: TABLE_SCHEMA
            // Avoid database directory scan: TABLE_NAME
            // We only use `TABLE_SCHEMA` and `TABLE_NAME` which is `SKIP_OPEN_TABLE`
            const tablesSql = tableNames
                .filter((tableName) => tableName)
                .map((tableName) => {
                let { database, tableName: name } = this.driver.parseTableName(tableName);
                if (!database) {
                    database = currentDatabase;
                }
                return `SELECT \`TABLE_SCHEMA\`, \`TABLE_NAME\`, \`TABLE_COMMENT\` FROM \`INFORMATION_SCHEMA\`.\`TABLES\` WHERE \`TABLE_SCHEMA\` = '${database}' AND \`TABLE_NAME\` = '${name}'`;
            })
                .join(" UNION ");
            dbTables.push(...(await this.query(tablesSql)));
        }
        // if tables were not found in the db, no need to proceed
        if (!dbTables.length)
            return [];
        // Avoid data directory scan: TABLE_SCHEMA
        // Avoid database directory scan: TABLE_NAME
        // Full columns: CARDINALITY & INDEX_TYPE - everything else is FRM only
        const statsSubquerySql = dbTables
            .map(({ TABLE_SCHEMA, TABLE_NAME }) => {
            return `
                SELECT
                    *
                FROM \`INFORMATION_SCHEMA\`.\`STATISTICS\`
                WHERE
                    \`TABLE_SCHEMA\` = '${TABLE_SCHEMA}'
                    AND
                    \`TABLE_NAME\` = '${TABLE_NAME}'
            `;
        })
            .join(" UNION ");
        // Avoid data directory scan: TABLE_SCHEMA
        // Avoid database directory scan: TABLE_NAME
        // All columns will hit the full table.
        const kcuSubquerySql = dbTables
            .map(({ TABLE_SCHEMA, TABLE_NAME }) => {
            return `
                SELECT
                    *
                FROM \`INFORMATION_SCHEMA\`.\`KEY_COLUMN_USAGE\` \`kcu\`
                WHERE
                    \`kcu\`.\`TABLE_SCHEMA\` = '${TABLE_SCHEMA}'
                    AND
                    \`kcu\`.\`TABLE_NAME\` = '${TABLE_NAME}'
            `;
        })
            .join(" UNION ");
        // Avoid data directory scan: CONSTRAINT_SCHEMA
        // Avoid database directory scan: TABLE_NAME
        // All columns will hit the full table.
        const rcSubquerySql = dbTables
            .map(({ TABLE_SCHEMA, TABLE_NAME }) => {
            return `
                SELECT
                    *
                FROM \`INFORMATION_SCHEMA\`.\`REFERENTIAL_CONSTRAINTS\`
                WHERE
                    \`CONSTRAINT_SCHEMA\` = '${TABLE_SCHEMA}'
                    AND
                    \`TABLE_NAME\` = '${TABLE_NAME}'
            `;
        })
            .join(" UNION ");
        // Avoid data directory scan: TABLE_SCHEMA
        // Avoid database directory scan: TABLE_NAME
        // OPEN_FRM_ONLY applies to all columns
        const columnsSql = dbTables
            .map(({ TABLE_SCHEMA, TABLE_NAME }) => {
            return `
                SELECT
                    *
                FROM
                    \`INFORMATION_SCHEMA\`.\`COLUMNS\`
                WHERE
                    \`TABLE_SCHEMA\` = '${TABLE_SCHEMA}'
                    AND
                    \`TABLE_NAME\` = '${TABLE_NAME}'
                `;
        })
            .join(" UNION ");
        // No Optimizations are available for COLLATIONS
        const collationsSql = `
            SELECT
                \`SCHEMA_NAME\`,
                \`DEFAULT_CHARACTER_SET_NAME\` as \`CHARSET\`,
                \`DEFAULT_COLLATION_NAME\` AS \`COLLATION\`
            FROM \`INFORMATION_SCHEMA\`.\`SCHEMATA\`
            `;
        // Key Column Usage but only for PKs
        const primaryKeySql = `SELECT * FROM (${kcuSubquerySql}) \`kcu\` WHERE \`CONSTRAINT_NAME\` = 'PRIMARY'`;
        // Combine stats & referential constraints
        const indicesSql = `
            SELECT
                \`s\`.*
            FROM (${statsSubquerySql}) \`s\`
            LEFT JOIN (${rcSubquerySql}) \`rc\`
                ON
                    \`s\`.\`INDEX_NAME\` = \`rc\`.\`CONSTRAINT_NAME\`
                    AND
                    \`s\`.\`TABLE_SCHEMA\` = \`rc\`.\`CONSTRAINT_SCHEMA\`
            WHERE
                \`s\`.\`INDEX_NAME\` != 'PRIMARY'
                AND
                \`rc\`.\`CONSTRAINT_NAME\` IS NULL
            `;
        // Combine Key Column Usage & Referential Constraints
        const foreignKeysSql = `
            SELECT
                \`kcu\`.\`TABLE_SCHEMA\`,
                \`kcu\`.\`TABLE_NAME\`,
                \`kcu\`.\`CONSTRAINT_NAME\`,
                \`kcu\`.\`COLUMN_NAME\`,
                \`kcu\`.\`REFERENCED_TABLE_SCHEMA\`,
                \`kcu\`.\`REFERENCED_TABLE_NAME\`,
                \`kcu\`.\`REFERENCED_COLUMN_NAME\`,
                \`rc\`.\`DELETE_RULE\` \`ON_DELETE\`,
                \`rc\`.\`UPDATE_RULE\` \`ON_UPDATE\`
            FROM (${kcuSubquerySql}) \`kcu\`
            INNER JOIN (${rcSubquerySql}) \`rc\`
                ON
                    \`rc\`.\`CONSTRAINT_SCHEMA\` = \`kcu\`.\`CONSTRAINT_SCHEMA\`
                    AND
                    \`rc\`.\`TABLE_NAME\` = \`kcu\`.\`TABLE_NAME\`
                    AND
                    \`rc\`.\`CONSTRAINT_NAME\` = \`kcu\`.\`CONSTRAINT_NAME\`
            `;
        const [dbColumns, dbPrimaryKeys, dbCollations, dbIndices, dbForeignKeys,] = await Promise.all([
            this.query(columnsSql),
            this.query(primaryKeySql),
            this.query(collationsSql),
            this.query(indicesSql),
            this.query(foreignKeysSql),
        ]);
        const isMariaDb = this.driver.options.type === "mariadb";
        const dbVersion = this.driver.version;
        // create tables for loaded tables
        return Promise.all(dbTables.map(async (dbTable) => {
            const table = new Table_1.Table();
            const dbCollation = dbCollations.find((coll) => coll["SCHEMA_NAME"] === dbTable["TABLE_SCHEMA"]);
            const defaultCollation = dbCollation["COLLATION"];
            const defaultCharset = dbCollation["CHARSET"];
            // We do not need to join database name, when database is by default.
            const db = dbTable["TABLE_SCHEMA"] === currentDatabase
                ? undefined
                : dbTable["TABLE_SCHEMA"];
            table.database = dbTable["TABLE_SCHEMA"];
            table.name = this.driver.buildTableName(dbTable["TABLE_NAME"], undefined, db);
            // create columns from the loaded columns
            table.columns = await Promise.all(dbColumns
                .filter((dbColumn) => dbColumn["TABLE_NAME"] ===
                dbTable["TABLE_NAME"] &&
                dbColumn["TABLE_SCHEMA"] ===
                    dbTable["TABLE_SCHEMA"])
                .map(async (dbColumn) => {
                const columnUniqueIndices = dbIndices.filter((dbIndex) => {
                    return (dbIndex["TABLE_NAME"] ===
                        dbTable["TABLE_NAME"] &&
                        dbIndex["TABLE_SCHEMA"] ===
                            dbTable["TABLE_SCHEMA"] &&
                        dbIndex["COLUMN_NAME"] ===
                            dbColumn["COLUMN_NAME"] &&
                        parseInt(dbIndex["NON_UNIQUE"], 10) ===
                            0);
                });
                const tableMetadata = this.connection.entityMetadatas.find((metadata) => this.getTablePath(table) ===
                    this.getTablePath(metadata));
                const hasIgnoredIndex = columnUniqueIndices.length > 0 &&
                    tableMetadata &&
                    tableMetadata.indices.some((index) => {
                        return columnUniqueIndices.some((uniqueIndex) => {
                            return (index.name ===
                                uniqueIndex["INDEX_NAME"] &&
                                index.synchronize === false);
                        });
                    });
                const isConstraintComposite = columnUniqueIndices.every((uniqueIndex) => {
                    return dbIndices.some((dbIndex) => dbIndex["INDEX_NAME"] ===
                        uniqueIndex["INDEX_NAME"] &&
                        dbIndex["COLUMN_NAME"] !==
                            dbColumn["COLUMN_NAME"]);
                });
                const tableColumn = new TableColumn_1.TableColumn();
                tableColumn.name = dbColumn["COLUMN_NAME"];
                tableColumn.type =
                    dbColumn["DATA_TYPE"].toLowerCase();
                // since mysql 8.0, "geometrycollection" returned as "geomcollection"
                // typeorm still use "geometrycollection"
                if (tableColumn.type === "geomcollection") {
                    tableColumn.type = "geometrycollection";
                }
                tableColumn.zerofill =
                    dbColumn["COLUMN_TYPE"].includes("zerofill");
                tableColumn.unsigned =
                    tableColumn.zerofill ||
                        dbColumn["COLUMN_TYPE"].includes("unsigned");
                if (this.driver.unsignedColumnTypes.includes(tableColumn.type)) {
                    const width = dbColumn["COLUMN_TYPE"].substring(dbColumn["COLUMN_TYPE"].indexOf("(") + 1, dbColumn["COLUMN_TYPE"].indexOf(")"));
                    tableColumn.width =
                        width &&
                            !this.isDefaultColumnWidth(table, tableColumn, parseInt(width))
                            ? parseInt(width)
                            : undefined;
                }
                if (dbColumn["COLUMN_DEFAULT"] === null ||
                    dbColumn["COLUMN_DEFAULT"] === undefined ||
                    (isMariaDb &&
                        dbColumn["COLUMN_DEFAULT"] === "NULL")) {
                    tableColumn.default = undefined;
                }
                else if (/^CURRENT_TIMESTAMP(\([0-9]*\))?$/i.test(dbColumn["COLUMN_DEFAULT"])) {
                    // New versions of MariaDB return expressions in lowercase.  We need to set it in
                    // uppercase so the comparison in MysqlDriver#compareDefaultValues does not fail.
                    tableColumn.default =
                        dbColumn["COLUMN_DEFAULT"].toUpperCase();
                }
                else if (isMariaDb &&
                    VersionUtils_1.VersionUtils.isGreaterOrEqual(dbVersion, "10.2.7")) {
                    // MariaDB started adding quotes to literals in COLUMN_DEFAULT since version 10.2.7
                    // See https://mariadb.com/kb/en/library/information-schema-columns-table/
                    tableColumn.default = dbColumn["COLUMN_DEFAULT"];
                }
                else {
                    tableColumn.default = `'${dbColumn["COLUMN_DEFAULT"]}'`;
                }
                if (dbColumn["EXTRA"].indexOf("on update") !== -1) {
                    // New versions of MariaDB return expressions in lowercase.  We need to set it in
                    // uppercase so the comparison in MysqlDriver#compareExtraValues does not fail.
                    tableColumn.onUpdate = dbColumn["EXTRA"]
                        .substring(dbColumn["EXTRA"].indexOf("on update") +
                        10)
                        .toUpperCase();
                }
                if (dbColumn["GENERATION_EXPRESSION"]) {
                    tableColumn.generatedType =
                        dbColumn["EXTRA"].indexOf("VIRTUAL") !== -1
                            ? "VIRTUAL"
                            : "STORED";
                    // We cannot relay on information_schema.columns.generation_expression, because it is formatted different.
                    const asExpressionQuery = this.selectTypeormMetadataSql({
                        schema: dbTable["TABLE_SCHEMA"],
                        table: dbTable["TABLE_NAME"],
                        type: MetadataTableType_1.MetadataTableType.GENERATED_COLUMN,
                        name: tableColumn.name,
                    });
                    const results = await this.query(asExpressionQuery.query, asExpressionQuery.parameters);
                    if (results[0] && results[0].value) {
                        tableColumn.asExpression = results[0].value;
                    }
                    else {
                        tableColumn.asExpression = "";
                    }
                }
                tableColumn.isUnique =
                    columnUniqueIndices.length > 0 &&
                        !hasIgnoredIndex &&
                        !isConstraintComposite;
                if (isMariaDb && tableColumn.generatedType) {
                    // do nothing - MariaDB does not support NULL/NOT NULL expressions for generated columns
                }
                else {
                    tableColumn.isNullable =
                        dbColumn["IS_NULLABLE"] === "YES";
                }
                tableColumn.isPrimary = dbPrimaryKeys.some((dbPrimaryKey) => {
                    return (dbPrimaryKey["TABLE_NAME"] ===
                        dbColumn["TABLE_NAME"] &&
                        dbPrimaryKey["TABLE_SCHEMA"] ===
                            dbColumn["TABLE_SCHEMA"] &&
                        dbPrimaryKey["COLUMN_NAME"] ===
                            dbColumn["COLUMN_NAME"]);
                });
                tableColumn.isGenerated =
                    dbColumn["EXTRA"].indexOf("auto_increment") !==
                        -1;
                if (tableColumn.isGenerated)
                    tableColumn.generationStrategy = "increment";
                tableColumn.comment =
                    typeof dbColumn["COLUMN_COMMENT"] ===
                        "string" &&
                        dbColumn["COLUMN_COMMENT"].length === 0
                        ? undefined
                        : dbColumn["COLUMN_COMMENT"];
                if (dbColumn["CHARACTER_SET_NAME"])
                    tableColumn.charset =
                        dbColumn["CHARACTER_SET_NAME"] ===
                            defaultCharset
                            ? undefined
                            : dbColumn["CHARACTER_SET_NAME"];
                if (dbColumn["COLLATION_NAME"])
                    tableColumn.collation =
                        dbColumn["COLLATION_NAME"] ===
                            defaultCollation
                            ? undefined
                            : dbColumn["COLLATION_NAME"];
                // check only columns that have length property
                if (this.driver.withLengthColumnTypes.indexOf(tableColumn.type) !== -1 &&
                    dbColumn["CHARACTER_MAXIMUM_LENGTH"]) {
                    let length = dbColumn["CHARACTER_MAXIMUM_LENGTH"];
                    if (tableColumn.type === "vector") {
                        // MySQL and MariaDb store the vector length in bytes, not in number of dimensions.
                        length = length / 4;
                    }
                    tableColumn.length =
                        !this.isDefaultColumnLength(table, tableColumn, length.toString())
                            ? length.toString()
                            : "";
                }
                if (tableColumn.type === "decimal" ||
                    tableColumn.type === "double" ||
                    tableColumn.type === "float") {
                    if (dbColumn["NUMERIC_PRECISION"] !== null &&
                        !this.isDefaultColumnPrecision(table, tableColumn, dbColumn["NUMERIC_PRECISION"]))
                        tableColumn.precision = parseInt(dbColumn["NUMERIC_PRECISION"]);
                    if (dbColumn["NUMERIC_SCALE"] !== null &&
                        !this.isDefaultColumnScale(table, tableColumn, dbColumn["NUMERIC_SCALE"]))
                        tableColumn.scale = parseInt(dbColumn["NUMERIC_SCALE"]);
                }
                if (tableColumn.type === "enum" ||
                    tableColumn.type === "simple-enum" ||
                    tableColumn.type === "set") {
                    const colType = dbColumn["COLUMN_TYPE"];
                    const items = colType
                        .substring(colType.indexOf("(") + 1, colType.lastIndexOf(")"))
                        .split(",");
                    tableColumn.enum = items.map((item) => {
                        return item.substring(1, item.length - 1);
                    });
                    tableColumn.length = "";
                }
                if ((tableColumn.type === "datetime" ||
                    tableColumn.type === "time" ||
                    tableColumn.type === "timestamp") &&
                    dbColumn["DATETIME_PRECISION"] !== null &&
                    dbColumn["DATETIME_PRECISION"] !== undefined &&
                    !this.isDefaultColumnPrecision(table, tableColumn, parseInt(dbColumn["DATETIME_PRECISION"]))) {
                    tableColumn.precision = parseInt(dbColumn["DATETIME_PRECISION"]);
                }
                return tableColumn;
            }));
            // find foreign key constraints of table, group them by constraint name and build TableForeignKey.
            const tableForeignKeyConstraints = OrmUtils_1.OrmUtils.uniq(dbForeignKeys.filter((dbForeignKey) => {
                return (dbForeignKey["TABLE_NAME"] ===
                    dbTable["TABLE_NAME"] &&
                    dbForeignKey["TABLE_SCHEMA"] ===
                        dbTable["TABLE_SCHEMA"]);
            }), (dbForeignKey) => dbForeignKey["CONSTRAINT_NAME"]);
            table.foreignKeys = tableForeignKeyConstraints.map((dbForeignKey) => {
                const foreignKeys = dbForeignKeys.filter((dbFk) => dbFk["CONSTRAINT_NAME"] ===
                    dbForeignKey["CONSTRAINT_NAME"]);
                // if referenced table located in currently used db, we don't need to concat db name to table name.
                const database = dbForeignKey["REFERENCED_TABLE_SCHEMA"] ===
                    currentDatabase
                    ? undefined
                    : dbForeignKey["REFERENCED_TABLE_SCHEMA"];
                const referencedTableName = this.driver.buildTableName(dbForeignKey["REFERENCED_TABLE_NAME"], undefined, database);
                return new TableForeignKey_1.TableForeignKey({
                    name: dbForeignKey["CONSTRAINT_NAME"],
                    columnNames: foreignKeys.map((dbFk) => dbFk["COLUMN_NAME"]),
                    referencedDatabase: dbForeignKey["REFERENCED_TABLE_SCHEMA"],
                    referencedTableName: referencedTableName,
                    referencedColumnNames: foreignKeys.map((dbFk) => dbFk["REFERENCED_COLUMN_NAME"]),
                    onDelete: dbForeignKey["ON_DELETE"],
                    onUpdate: dbForeignKey["ON_UPDATE"],
                });
            });
            // find index constraints of table, group them by constraint name and build TableIndex.
            const tableIndexConstraints = OrmUtils_1.OrmUtils.uniq(dbIndices.filter((dbIndex) => dbIndex["TABLE_NAME"] === dbTable["TABLE_NAME"] &&
                dbIndex["TABLE_SCHEMA"] === dbTable["TABLE_SCHEMA"]), (dbIndex) => dbIndex["INDEX_NAME"]);
            table.indices = tableIndexConstraints.map((constraint) => {
                const indices = dbIndices.filter((index) => {
                    return (index["TABLE_SCHEMA"] ===
                        constraint["TABLE_SCHEMA"] &&
                        index["TABLE_NAME"] === constraint["TABLE_NAME"] &&
                        index["INDEX_NAME"] === constraint["INDEX_NAME"]);
                });
                const nonUnique = parseInt(constraint["NON_UNIQUE"], 10);
                return new TableIndex_1.TableIndex({
                    table: table,
                    name: constraint["INDEX_NAME"],
                    columnNames: indices.map((i) => i["COLUMN_NAME"]),
                    isUnique: nonUnique === 0,
                    isSpatial: constraint["INDEX_TYPE"] === "SPATIAL",
                    isFulltext: constraint["INDEX_TYPE"] === "FULLTEXT",
                });
            });
            table.comment = dbTable["TABLE_COMMENT"];
            return table;
        }));
    }
    /**
     * Builds create table sql
     */
    createTableSql(table, createForeignKeys) {
        const columnDefinitions = table.columns
            .map((column) => this.buildCreateColumnSql(column, true))
            .join(", ");
        let sql = `CREATE TABLE ${this.escapePath(table)} (${columnDefinitions}`;
        // we create unique indexes instead of unique constraints, because MySql does not have unique constraints.
        // if we mark column as Unique, it means that we create UNIQUE INDEX.
        table.columns
            .filter((column) => column.isUnique)
            .forEach((column) => {
            const isUniqueIndexExist = table.indices.some((index) => {
                return (index.columnNames.length === 1 &&
                    !!index.isUnique &&
                    index.columnNames.indexOf(column.name) !== -1);
            });
            const isUniqueConstraintExist = table.uniques.some((unique) => {
                return (unique.columnNames.length === 1 &&
                    unique.columnNames.indexOf(column.name) !== -1);
            });
            if (!isUniqueIndexExist && !isUniqueConstraintExist)
                table.indices.push(new TableIndex_1.TableIndex({
                    name: this.connection.namingStrategy.uniqueConstraintName(table, [column.name]),
                    columnNames: [column.name],
                    isUnique: true,
                }));
        });
        // as MySql does not have unique constraints, we must create table indices from table uniques and mark them as unique.
        if (table.uniques.length > 0) {
            table.uniques.forEach((unique) => {
                const uniqueExist = table.indices.some((index) => index.name === unique.name);
                if (!uniqueExist) {
                    table.indices.push(new TableIndex_1.TableIndex({
                        name: unique.name,
                        columnNames: unique.columnNames,
                        isUnique: true,
                    }));
                }
            });
        }
        if (table.indices.length > 0) {
            const indicesSql = table.indices
                .map((index) => {
                const columnNames = index.columnNames
                    .map((columnName) => `\`${columnName}\``)
                    .join(", ");
                if (!index.name)
                    index.name = this.connection.namingStrategy.indexName(table, index.columnNames, index.where);
                let indexType = "";
                if (index.isUnique)
                    indexType += "UNIQUE ";
                if (index.isSpatial)
                    indexType += "SPATIAL ";
                if (index.isFulltext)
                    indexType += "FULLTEXT ";
                const indexParser = index.isFulltext && index.parser
                    ? ` WITH PARSER ${index.parser}`
                    : "";
                return `${indexType}INDEX \`${index.name}\` (${columnNames})${indexParser}`;
            })
                .join(", ");
            sql += `, ${indicesSql}`;
        }
        if (table.foreignKeys.length > 0 && createForeignKeys) {
            const foreignKeysSql = table.foreignKeys
                .map((fk) => {
                const columnNames = fk.columnNames
                    .map((columnName) => `\`${columnName}\``)
                    .join(", ");
                if (!fk.name)
                    fk.name = this.connection.namingStrategy.foreignKeyName(table, fk.columnNames, this.getTablePath(fk), fk.referencedColumnNames);
                const referencedColumnNames = fk.referencedColumnNames
                    .map((columnName) => `\`${columnName}\``)
                    .join(", ");
                let constraint = `CONSTRAINT \`${fk.name}\` FOREIGN KEY (${columnNames}) REFERENCES ${this.escapePath(this.getTablePath(fk))} (${referencedColumnNames})`;
                if (fk.onDelete)
                    constraint += ` ON DELETE ${fk.onDelete}`;
                if (fk.onUpdate)
                    constraint += ` ON UPDATE ${fk.onUpdate}`;
                return constraint;
            })
                .join(", ");
            sql += `, ${foreignKeysSql}`;
        }
        if (table.primaryColumns.length > 0) {
            const columnNames = table.primaryColumns
                .map((column) => `\`${column.name}\``)
                .join(", ");
            sql += `, PRIMARY KEY (${columnNames})`;
        }
        sql += `) ENGINE=${table.engine || "InnoDB"}`;
        if (table.comment) {
            sql += ` COMMENT="${table.comment}"`;
        }
        return new Query_1.Query(sql);
    }
    /**
     * Builds drop table sql
     */
    dropTableSql(tableOrName) {
        return new Query_1.Query(`DROP TABLE ${this.escapePath(tableOrName)}`);
    }
    createViewSql(view) {
        if (typeof view.expression === "string") {
            return new Query_1.Query(`CREATE VIEW ${this.escapePath(view)} AS ${view.expression}`);
        }
        else {
            return new Query_1.Query(`CREATE VIEW ${this.escapePath(view)} AS ${view
                .expression(this.connection)
                .getQuery()}`);
        }
    }
    async insertViewDefinitionSql(view) {
        const currentDatabase = await this.getCurrentDatabase();
        const expression = typeof view.expression === "string"
            ? view.expression.trim()
            : view.expression(this.connection).getQuery();
        return this.insertTypeormMetadataSql({
            type: MetadataTableType_1.MetadataTableType.VIEW,
            schema: currentDatabase,
            name: view.name,
            value: expression,
        });
    }
    /**
     * Builds drop view sql.
     */
    dropViewSql(viewOrPath) {
        return new Query_1.Query(`DROP VIEW ${this.escapePath(viewOrPath)}`);
    }
    /**
     * Builds remove view sql.
     */
    async deleteViewDefinitionSql(viewOrPath) {
        const currentDatabase = await this.getCurrentDatabase();
        const viewName = InstanceChecker_1.InstanceChecker.isView(viewOrPath)
            ? viewOrPath.name
            : viewOrPath;
        return this.deleteTypeormMetadataSql({
            type: MetadataTableType_1.MetadataTableType.VIEW,
            schema: currentDatabase,
            name: viewName,
        });
    }
    /**
     * Builds create index sql.
     */
    createIndexSql(table, index) {
        const columns = index.columnNames
            .map((columnName) => `\`${columnName}\``)
            .join(", ");
        let indexType = "";
        if (index.isUnique)
            indexType += "UNIQUE ";
        if (index.isSpatial)
            indexType += "SPATIAL ";
        if (index.isFulltext)
            indexType += "FULLTEXT ";
        const indexParser = index.isFulltext && index.parser
            ? ` WITH PARSER ${index.parser}`
            : "";
        return new Query_1.Query(`CREATE ${indexType}INDEX \`${index.name}\` ON ${this.escapePath(table)} (${columns})${indexParser}`);
    }
    /**
     * Builds drop index sql.
     */
    dropIndexSql(table, indexOrName) {
        const indexName = InstanceChecker_1.InstanceChecker.isTableIndex(indexOrName)
            ? indexOrName.name
            : indexOrName;
        return new Query_1.Query(`DROP INDEX \`${indexName}\` ON ${this.escapePath(table)}`);
    }
    /**
     * Builds create primary key sql.
     */
    createPrimaryKeySql(table, columnNames) {
        const columnNamesString = columnNames
            .map((columnName) => `\`${columnName}\``)
            .join(", ");
        return new Query_1.Query(`ALTER TABLE ${this.escapePath(table)} ADD PRIMARY KEY (${columnNamesString})`);
    }
    /**
     * Builds drop primary key sql.
     */
    dropPrimaryKeySql(table) {
        return new Query_1.Query(`ALTER TABLE ${this.escapePath(table)} DROP PRIMARY KEY`);
    }
    /**
     * Builds create foreign key sql.
     */
    createForeignKeySql(table, foreignKey) {
        const columnNames = foreignKey.columnNames
            .map((column) => `\`${column}\``)
            .join(", ");
        const referencedColumnNames = foreignKey.referencedColumnNames
            .map((column) => `\`${column}\``)
            .join(",");
        let sql = `ALTER TABLE ${this.escapePath(table)} ADD CONSTRAINT \`${foreignKey.name}\` FOREIGN KEY (${columnNames}) ` +
            `REFERENCES ${this.escapePath(this.getTablePath(foreignKey))}(${referencedColumnNames})`;
        if (foreignKey.onDelete)
            sql += ` ON DELETE ${foreignKey.onDelete}`;
        if (foreignKey.onUpdate)
            sql += ` ON UPDATE ${foreignKey.onUpdate}`;
        return new Query_1.Query(sql);
    }
    /**
     * Builds drop foreign key sql.
     */
    dropForeignKeySql(table, foreignKeyOrName) {
        const foreignKeyName = InstanceChecker_1.InstanceChecker.isTableForeignKey(foreignKeyOrName)
            ? foreignKeyOrName.name
            : foreignKeyOrName;
        return new Query_1.Query(`ALTER TABLE ${this.escapePath(table)} DROP FOREIGN KEY \`${foreignKeyName}\``);
    }
    /**
     * Escapes a given comment so it's safe to include in a query.
     */
    escapeComment(comment) {
        if (!comment || comment.length === 0) {
            return `''`;
        }
        comment = comment
            .replace(/\\/g, "\\\\") // MySQL allows escaping characters via backslashes
            .replace(/'/g, "''")
            .replace(/\u0000/g, ""); // Null bytes aren't allowed in comments
        return `'${comment}'`;
    }
    /**
     * Escapes given table or view path.
     */
    escapePath(target) {
        const { database, tableName } = this.driver.parseTableName(target);
        if (database && database !== this.driver.database) {
            return `\`${database}\`.\`${tableName}\``;
        }
        return `\`${tableName}\``;
    }
    /**
     * Builds a part of query to create/change a column.
     */
    buildCreateColumnSql(column, skipPrimary, skipName = false) {
        let c = "";
        if (skipName) {
            c = this.connection.driver.createFullType(column);
        }
        else {
            c = `\`${column.name}\` ${this.connection.driver.createFullType(column)}`;
        }
        if (column.charset)
            c += ` CHARACTER SET "${column.charset}"`;
        if (column.collation)
            c += ` COLLATE "${column.collation}"`;
        if (column.asExpression)
            c += ` AS (${column.asExpression}) ${column.generatedType ? column.generatedType : "VIRTUAL"}`;
        // if you specify ZEROFILL for a numeric column, MySQL automatically adds the UNSIGNED attribute to that column.
        if (column.zerofill) {
            c += " ZEROFILL";
        }
        else if (column.unsigned) {
            c += " UNSIGNED";
        }
        if (column.enum)
            c += ` (${column.enum
                .map((value) => "'" + value.replace(/'/g, "''") + "'")
                .join(", ")})`;
        const isMariaDb = this.driver.options.type === "mariadb";
        if (isMariaDb &&
            column.asExpression &&
            ["VIRTUAL", "STORED"].includes(column.generatedType || "VIRTUAL")) {
            // do nothing - MariaDB does not support NULL/NOT NULL expressions for VIRTUAL columns and STORED columns
        }
        else {
            if (!column.isNullable)
                c += " NOT NULL";
            if (column.isNullable)
                c += " NULL";
        }
        if (column.isPrimary && !skipPrimary)
            c += " PRIMARY KEY";
        if (column.isGenerated && column.generationStrategy === "increment")
            // don't use skipPrimary here since updates can update already exist primary without auto inc.
            c += " AUTO_INCREMENT";
        if (column.comment && column.comment.length > 0)
            c += ` COMMENT ${this.escapeComment(column.comment)}`;
        if (column.default !== undefined && column.default !== null)
            c += ` DEFAULT ${column.default}`;
        if (column.onUpdate)
            c += ` ON UPDATE ${column.onUpdate}`;
        return c;
    }
    async getVersion() {
        const result = await this.query("SELECT version()");
        // MariaDB: https://mariadb.com/kb/en/version/
        // - "10.2.27-MariaDB-10.2.27+maria~jessie-log"
        // MySQL: https://dev.mysql.com/doc/refman/8.4/en/information-functions.html#function_version
        // - "8.4.3"
        // - "8.4.4-standard"
        const versionString = result[0]["version()"];
        return versionString.replace(/^([\d.]+).*$/, "$1");
    }
    /**
     * Checks if column display width is by default.
     * @deprecated MySQL no longer supports column width in newer versions.
     */
    isDefaultColumnWidth(table, column, width) {
        // Skip the whole check on servers that no longer expose width metadata.
        if (this.driver.options.type === "mysql" &&
            DriverUtils_1.DriverUtils.isReleaseVersionOrGreater(this.driver, "8.0.0")) {
            return true;
        }
        // if table have metadata, we check if length is specified in column metadata
        if (this.connection.hasMetadata(table.name)) {
            const metadata = this.connection.getMetadata(table.name);
            const columnMetadata = metadata.findColumnWithDatabaseName(column.name);
            if (columnMetadata && columnMetadata.width)
                return false;
        }
        const defaultWidthForType = this.connection.driver.dataTypeDefaults &&
            this.connection.driver.dataTypeDefaults[column.type] &&
            this.connection.driver.dataTypeDefaults[column.type].width;
        if (defaultWidthForType) {
            // In MariaDB & MySQL 5.7, the default widths of certain numeric types are 1 less than
            // the usual defaults when the column is unsigned.
            const typesWithReducedUnsignedDefault = [
                "int",
                "tinyint",
                "smallint",
                "mediumint",
            ];
            const needsAdjustment = typesWithReducedUnsignedDefault.indexOf(column.type) !== -1;
            if (column.unsigned && needsAdjustment) {
                return defaultWidthForType - 1 === width;
            }
            else {
                return defaultWidthForType === width;
            }
        }
        return false;
    }
}
exports.MysqlQueryRunner = MysqlQueryRunner;

//# sourceMappingURL=MysqlQueryRunner.js.map
