74 lines
2.7 KiB
JavaScript
74 lines
2.7 KiB
JavaScript
import Dialect from '../dialect.mjs';
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import MysqlSchemaInspector from './schema-inspector.mjs';
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import MysqlDatabaseInspector from './database-inspector.mjs';
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class MysqlDialect extends Dialect {
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configure() {
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const connection = this.db.config.connection.connection;
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connection.supportBigNumbers = true;
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// Only allow bigNumberStrings option set to be true if no connection option passed
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// Otherwise bigNumberStrings option should be allowed to used from DB config
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if (connection.bigNumberStrings === undefined) {
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connection.bigNumberStrings = true;
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}
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connection.typeCast = (field, next)=>{
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if (field.type === 'DECIMAL' || field.type === 'NEWDECIMAL') {
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const value = field.string();
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return value === null ? null : Number(value);
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}
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if (field.type === 'TINY' && field.length === 1) {
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const value = field.string();
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return value ? value === '1' : null;
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}
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if (field.type === 'DATE') {
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return field.string();
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}
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return next();
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};
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}
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async initialize(nativeConnection) {
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try {
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await this.db.connection.raw(`set session sql_require_primary_key = 0;`).connection(nativeConnection);
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} catch (err) {
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// Ignore error due to lack of session permissions
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}
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// We only need to get info on the first connection in the pool
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/**
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* Note: There is a race condition here where if two connections are opened at the same time, both will retrieve
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* db info, but it doesn't cause issues, it's just one wasted query one time, so we can safely leave it to avoid
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* adding extra complexity
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* */ if (!this.info) {
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this.info = await this.databaseInspector.getInformation(nativeConnection);
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}
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}
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async startSchemaUpdate() {
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try {
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await this.db.connection.raw(`set foreign_key_checks = 0;`);
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await this.db.connection.raw(`set session sql_require_primary_key = 0;`);
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} catch (err) {
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// Ignore error due to lack of session permissions
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}
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}
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async endSchemaUpdate() {
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await this.db.connection.raw(`set foreign_key_checks = 1;`);
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}
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supportsUnsigned() {
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return true;
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}
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usesForeignKeys() {
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return true;
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}
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transformErrors(error) {
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super.transformErrors(error);
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}
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constructor(db){
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super(db, 'mysql');
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this.info = null;
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this.schemaInspector = new MysqlSchemaInspector(db);
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this.databaseInspector = new MysqlDatabaseInspector(db);
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}
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}
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export { MysqlDialect as default };
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//# sourceMappingURL=index.mjs.map
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