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Removed queries against information_schema (#12739)

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We were originally checking the state of the database, e.g. if a foreign
key constraint existed, so that we could conditionally act upon it. This
was to ensure that our migrations are idempotent.

Some database configurations, for example if you have many databases on
a single MySQL instance, would cause these information_schema queries to
take an exceptionally long time.

In order to speed up migrations, we instead attempt the action we want
to apply to the database, and then catch relevant errors to ensure the
migration is idempotent.

SQLite does not error when adding duplicate foreign or primary key
constraints, meaning that we must keep in pre-checks for these
operations, when running on SQLite

Co-authored-by: Daniel Lockyer <hi@daniellockyer.com>
This commit is contained in:
Fabien 'egg' O'Carroll 2021-03-09 16:12:10 +00:00 committed by GitHub
parent 2eb5f19090
commit 52d1940460
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 101 additions and 125 deletions
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198
core/server/data/schema/commands.js
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@ -63,64 +63,30 @@ function dropColumn(tableName, column, transaction) {
});
}
/**
* Checks if unique index exists in a table over the given columns.
*
* @param {string} tableName - name of the table to add unique constraint to
* @param {string|[string]} columns - column(s) to form unique constraint with
* @param {Object} transaction - connection object containing knex reference
* @param {Object} transaction.knex - knex instance
*/
async function hasUnique(tableName, columns, transaction) {
const knex = (transaction || db.knex);
const client = knex.client.config.client;
const columnNames = _.isArray(columns) ? columns.join('_') : columns;
const constraintName = `${tableName}_${columnNames}_unique`;
if (client === 'mysql') {
const dbName = knex.client.config.connection.database;
const [rawConstraints] = await knex.raw(`
SELECT CONSTRAINT_NAME
FROM information_schema.TABLE_CONSTRAINTS
WHERE 1=1
AND CONSTRAINT_SCHEMA=:dbName
AND TABLE_NAME=:tableName
AND CONSTRAINT_TYPE='UNIQUE'`, {dbName, tableName});
const dbConstraints = rawConstraints.map(c => c.CONSTRAINT_NAME);
if (dbConstraints.includes(constraintName)) {
return true;
}
} else {
const rawConstraints = await knex.raw(`PRAGMA index_list('${tableName}');`);
const dbConstraints = rawConstraints.map(c => c.name);
if (dbConstraints.includes(constraintName)) {
return true;
}
}
return false;
}
/**
* Adds an unique index to a table over the given columns.
*
* @param {string} tableName - name of the table to add unique constraint to
* @param {string|[string]} columns - column(s) to form unique constraint with
* @param {Object} transaction - connection object containing knex reference
* @param {Object} transaction.knex - knex instance
* @param {import('knex')} transaction - connection object containing knex reference
*/
async function addUnique(tableName, columns, transaction) {
const hasUniqueConstraint = await hasUnique(tableName, columns, transaction);
if (!hasUniqueConstraint) {
try {
logging.info(`Adding unique constraint for: ${columns} in table ${tableName}`);
return (transaction || db.knex).schema.table(tableName, function (table) {
return await (transaction || db.knex).schema.table(tableName, function (table) {
table.unique(columns);
});
} else {
} catch (err) {
if (err.code === 'SQLITE_ERROR') {
logging.warn(`Constraint for: ${columns} already exists for table: ${tableName}`);
return;
}
if (err.code === 'ER_DUP_KEYNAME') {
logging.warn(`Constraint for: ${columns} already exists for table: ${tableName}`);
return;
}
throw err;
}
}
@ -129,19 +95,25 @@ async function addUnique(tableName, columns, transaction) {
*
* @param {string} tableName - name of the table to drop unique constraint from
* @param {string|[string]} columns - column(s) unique constraint was formed
* @param {Object} transaction - connection object containing knex reference
* @param {Object} transaction.knex - knex instance
* @param {import('knex')} transaction - connection object containing knex reference
*/
async function dropUnique(tableName, columns, transaction) {
const hasUniqueConstraint = await hasUnique(tableName, columns, transaction);
if (hasUniqueConstraint) {
try {
logging.info(`Dropping unique constraint for: ${columns} in table: ${tableName}`);
return (transaction || db.knex).schema.table(tableName, function (table) {
return await (transaction || db.knex).schema.table(tableName, function (table) {
table.dropUnique(columns);
});
} else {
} catch (err) {
if (err.code === 'SQLITE_ERROR') {
logging.warn(`Constraint for: ${columns} does not exist for table: ${tableName}`);
return;
}
if (err.code === 'ER_CANT_DROP_FIELD_OR_KEY') {
logging.warn(`Constraint for: ${columns} does not exist for table: ${tableName}`);
return;
}
throw err;
}
}
@ -153,34 +125,21 @@ async function dropUnique(tableName, columns, transaction) {
* @param {string} configuration.fromColumn - column of the table to add the foreign key to
* @param {string} configuration.toTableName - name of the table to point the foreign key to
* @param {string} configuration.toColumn - column of the table to point the foreign key to
* @param {Object} configuration.transaction - connection object containing knex reference
* @param {Object} configuration.transaction.knex - knex instance
* @param {import('knex')} configuration.transaction - connection object containing knex reference
*/
async function hasForeign({fromTable, fromColumn, toTable, toColumn, transaction}) {
async function hasForeignSQLite({fromTable, fromColumn, toTable, toColumn, transaction}) {
const knex = (transaction || db.knex);
const client = knex.client.config.client;
if (client === 'mysql') {
const dbName = knex.client.config.connection.database;
const [rawConstraints] = await knex.raw(`
SELECT i.TABLE_NAME, k.COLUMN_NAME, k.REFERENCED_TABLE_NAME, k.REFERENCED_COLUMN_NAME
FROM information_schema.TABLE_CONSTRAINTS i
INNER JOIN information_schema.KEY_COLUMN_USAGE k ON i.CONSTRAINT_NAME = k.CONSTRAINT_NAME
WHERE i.CONSTRAINT_TYPE = 'FOREIGN KEY'
AND i.CONSTRAINT_SCHEMA=:dbName
AND i.TABLE_NAME = :fromTable
AND k.COLUMN_NAME = :fromColumn
AND k.REFERENCED_TABLE_NAME = :toTable
AND k.REFERENCED_COLUMN_NAME = :toColumn`, {dbName, fromTable, fromColumn, toTable, toColumn});
if (client !== 'sqlite3') {
throw new Error('Must use hasForeignSQLite3 on an SQLite3 database');
}
return rawConstraints.length >= 1;
} else {
const foreignKeys = await knex.raw(`PRAGMA foreign_key_list('${fromTable}');`);
const hasForeignKey = foreignKeys.some(foreignKey => foreignKey.table === toTable && foreignKey.from === fromColumn && foreignKey.to === toColumn);
return hasForeignKey;
}
}
/**
@ -192,18 +151,23 @@ async function hasForeign({fromTable, fromColumn, toTable, toColumn, transaction
* @param {string} configuration.toTableName - name of the table to point the foreign key to
* @param {string} configuration.toColumn - column of the table to point the foreign key to
* @param {Boolean} configuration.cascadeDelete - adds the "on delete cascade" option if true
* @param {Object} configuration.transaction - connection object containing knex reference
* @param {Object} configuration.transaction.knex - knex instance
* @param {import('knex')} configuration.transaction - connection object containing knex reference
*/
async function addForeign({fromTable, fromColumn, toTable, toColumn, cascadeDelete = false, transaction}) {
const hasForeignKey = await hasForeign({fromTable, fromColumn, toTable, toColumn, transaction});
if (!hasForeignKey) {
const isSQLite = db.knex.client.config.client === 'sqlite3';
if (isSQLite) {
const foreignKeyExists = await hasForeignSQLite({fromTable, fromColumn, toTable, toColumn, transaction});
if (foreignKeyExists) {
logging.warn(`Skipped adding foreign key from ${fromTable}.${fromColumn} to ${toTable}.${toColumn} - foreign key already exists`);
return;
}
}
try {
logging.info(`Adding foreign key from ${fromTable}.${fromColumn} to ${toTable}.${toColumn}`);
//disable and re-enable foreign key checks on sqlite because of https://github.com/knex/knex/issues/4155
let foreignKeysEnabled;
if (db.knex.client.config.client === 'sqlite3') {
if (isSQLite) {
foreignKeysEnabled = await db.knex.raw('PRAGMA foreign_keys;');
if (foreignKeysEnabled[0].foreign_keys) {
await db.knex.raw('PRAGMA foreign_keys = OFF;');
@ -218,13 +182,17 @@ async function addForeign({fromTable, fromColumn, toTable, toColumn, cascadeDele
}
});
if (db.knex.client.config.client === 'sqlite3') {
if (isSQLite) {
if (foreignKeysEnabled[0].foreign_keys) {
await db.knex.raw('PRAGMA foreign_keys = ON;');
}
}
} else {
} catch (err) {
if (err.code === 'ER_DUP_KEY') {
logging.warn(`Skipped adding foreign key from ${fromTable}.${fromColumn} to ${toTable}.${toColumn} - foreign key already exists`);
return;
}
throw err;
}
}
@ -236,18 +204,23 @@ async function addForeign({fromTable, fromColumn, toTable, toColumn, cascadeDele
* @param {string} configuration.fromColumn - column of the table to add the foreign key to
* @param {string} configuration.toTableName - name of the table to point the foreign key to
* @param {string} configuration.toColumn - column of the table to point the foreign key to
* @param {Object} configuration.transaction - connection object containing knex reference
* @param {Object} configuration.transaction.knex - knex instance
* @param {import('knex')} configuration.transaction - connection object containing knex reference
*/
async function dropForeign({fromTable, fromColumn, toTable, toColumn, transaction}) {
const hasForeignKey = await hasForeign({fromTable, fromColumn, toTable, toColumn, transaction});
if (hasForeignKey) {
const isSQLite = db.knex.client.config.client === 'sqlite3';
if (isSQLite) {
const foreignKeyExists = await hasForeignSQLite({fromTable, fromColumn, toTable, toColumn, transaction});
if (!foreignKeyExists) {
logging.warn(`Skipped dropping foreign key from ${fromTable}.${fromColumn} to ${toTable}.${toColumn} - foreign key does not exist`);
return;
}
}
try {
logging.info(`Dropping foreign key from ${fromTable}.${fromColumn} to ${toTable}.${toColumn}`);
//disable and re-enable foreign key checks on sqlite because of https://github.com/knex/knex/issues/4155
let foreignKeysEnabled;
if (db.knex.client.config.client === 'sqlite3') {
if (isSQLite) {
foreignKeysEnabled = await db.knex.raw('PRAGMA foreign_keys;');
if (foreignKeysEnabled[0].foreign_keys) {
await db.knex.raw('PRAGMA foreign_keys = OFF;');
@ -258,44 +231,38 @@ async function dropForeign({fromTable, fromColumn, toTable, toColumn, transactio
table.dropForeign(fromColumn);
});
if (db.knex.client.config.client === 'sqlite3') {
if (isSQLite) {
if (foreignKeysEnabled[0].foreign_keys) {
await db.knex.raw('PRAGMA foreign_keys = ON;');
}
}
} else {
} catch (err) {
if (err.code === 'ER_CANT_DROP_FIELD_OR_KEY') {
logging.warn(`Skipped dropping foreign key from ${fromTable}.${fromColumn} to ${toTable}.${toColumn} - foreign key does not exist`);
return;
}
throw err;
}
}
/**
* Checks if primary key index exists in a table over the given columns.
*
* @param {string} tableName - name of the table to add primary key constraint to
* @param {Object} transaction - connnection object containing knex reference
* @param {Object} transaction.knex - knex instance
* @param {string} tableName - name of the table to check primary key constraint on
* @param {import('knex')} transaction - connnection object containing knex reference
*/
async function hasPrimaryKey(tableName, transaction) {
async function hasPrimaryKeySQLite(tableName, transaction) {
const knex = (transaction || db.knex);
const client = knex.client.config.client;
if (client === 'mysql') {
const dbName = knex.client.config.connection.database;
const [rawConstraints] = await knex.raw(`
SELECT CONSTRAINT_NAME
FROM information_schema.TABLE_CONSTRAINTS
WHERE 1=1
AND CONSTRAINT_SCHEMA=:dbName
AND TABLE_NAME=:tableName
AND CONSTRAINT_TYPE='PRIMARY KEY'`, {dbName, tableName});
if (client !== 'sqlite3') {
throw new Error('Must use hasPrimaryKeySQLite on an SQLite3 database');
}
return rawConstraints.length > 0;
} else {
const rawConstraints = await knex.raw(`PRAGMA index_list('${tableName}');`);
const tablePrimaryKey = rawConstraints.find(c => c.origin === 'pk');
return tablePrimaryKey;
}
}
/**
@ -303,19 +270,28 @@ async function hasPrimaryKey(tableName, transaction) {
*
* @param {string} tableName - name of the table to add primaykey constraint to
* @param {string|[string]} columns - column(s) to form primary key constraint with
* @param {Object} transaction - connnection object containing knex reference
* @param {Object} transaction.knex - knex instance
* @param {import('knex')} transaction - connnection object containing knex reference
*/
async function addPrimaryKey(tableName, columns, transaction) {
const hasUniqueConstraint = await hasPrimaryKey(tableName, transaction);
if (!hasUniqueConstraint) {
const isSQLite = db.knex.client.config.client === 'sqlite3';
if (isSQLite) {
const primaryKeyExists = await hasPrimaryKeySQLite(tableName, transaction);
if (primaryKeyExists) {
logging.warn(`Primary key constraint for: ${columns} already exists for table: ${tableName}`);
return;
}
}
try {
logging.info(`Adding primary key constraint for: ${columns} in table ${tableName}`);
return (transaction || db.knex).schema.table(tableName, function (table) {
return await (transaction || db.knex).schema.table(tableName, function (table) {
table.primary(columns);
});
} else {
} catch (err) {
if (err.code === 'ER_MULTIPLE_PRI_KEY') {
logging.warn(`Primary key constraint for: ${columns} already exists for table: ${tableName}`);
return;
}
throw err;
}
}