typeorm
Version:
Data-Mapper ORM for TypeScript and ES2021+. Supports MySQL/MariaDB, PostgreSQL, MS SQL Server, Oracle, SAP HANA, SQLite, MongoDB databases.
123 lines (121 loc) • 5.3 kB
JavaScript
import { QueryRunnerAlreadyReleasedError } from "../../error/QueryRunnerAlreadyReleasedError";
import { QueryFailedError } from "../../error/QueryFailedError";
import { AbstractSqliteQueryRunner } from "../sqlite-abstract/AbstractSqliteQueryRunner";
import { Broadcaster } from "../../subscriber/Broadcaster";
import { QueryResult } from "../../query-runner/QueryResult";
import { BroadcasterResult } from "../../subscriber/BroadcasterResult";
/**
* Runs queries on a single sqlite database connection.
*
* Does not support compose primary keys with autoincrement field.
* todo: need to throw exception for this case.
*/
export class BetterSqlite3QueryRunner extends AbstractSqliteQueryRunner {
// -------------------------------------------------------------------------
// Constructor
// -------------------------------------------------------------------------
constructor(driver) {
super();
this.stmtCache = new Map();
this.driver = driver;
this.connection = driver.connection;
this.broadcaster = new Broadcaster(this);
if (typeof this.driver.options.statementCacheSize === "number") {
this.cacheSize = this.driver.options.statementCacheSize;
}
else {
this.cacheSize = 100;
}
}
async getStmt(query) {
if (this.cacheSize > 0) {
let stmt = this.stmtCache.get(query);
if (!stmt) {
const databaseConnection = await this.connect();
stmt = databaseConnection.prepare(query);
this.stmtCache.set(query, stmt);
while (this.stmtCache.size > this.cacheSize) {
// since es6 map keeps the insertion order,
// it comes to be FIFO cache
const key = this.stmtCache.keys().next().value;
this.stmtCache.delete(key);
}
}
return stmt;
}
else {
const databaseConnection = await this.connect();
return databaseConnection.prepare(query);
}
}
/**
* Called before migrations are run.
*/
async beforeMigration() {
await this.query(`PRAGMA foreign_keys = OFF`);
}
/**
* Called after migrations are run.
*/
async afterMigration() {
await this.query(`PRAGMA foreign_keys = ON`);
}
/**
* Executes a given SQL query.
*/
async query(query, parameters, useStructuredResult = false) {
if (this.isReleased)
throw new QueryRunnerAlreadyReleasedError();
const connection = this.driver.connection;
const broadcasterResult = new BroadcasterResult();
this.driver.connection.logger.logQuery(query, parameters, this);
this.broadcaster.broadcastBeforeQueryEvent(broadcasterResult, query, parameters);
const queryStartTime = Date.now();
const stmt = await this.getStmt(query);
try {
const result = new QueryResult();
if (stmt.reader) {
const raw = stmt.all.apply(stmt, parameters);
result.raw = raw;
if (Array.isArray(raw)) {
result.records = raw;
}
}
else {
const raw = stmt.run.apply(stmt, parameters);
result.affected = raw.changes;
result.raw = raw.lastInsertRowid;
}
// 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)
connection.logger.logQuerySlow(queryExecutionTime, query, parameters, this);
this.broadcaster.broadcastAfterQueryEvent(broadcasterResult, query, parameters, true, queryExecutionTime, result.raw, undefined);
if (!useStructuredResult) {
return result.raw;
}
return result;
}
catch (err) {
connection.logger.logQueryError(err, query, parameters, this);
throw new QueryFailedError(query, parameters, err);
}
}
// -------------------------------------------------------------------------
// Protected Methods
// -------------------------------------------------------------------------
async loadTableRecords(tablePath, tableOrIndex) {
const [database, tableName] = this.splitTablePath(tablePath);
const res = await this.query(`SELECT ${database ? `'${database}'` : null} as database, * FROM ${this.escapePath(`${database ? `${database}.` : ""}sqlite_master`)} WHERE "type" = '${tableOrIndex}' AND "${tableOrIndex === "table" ? "name" : "tbl_name"}" IN ('${tableName}')`);
return res;
}
async loadPragmaRecords(tablePath, pragma) {
const [database, tableName] = this.splitTablePath(tablePath);
const res = await this.query(`PRAGMA ${database ? `"${database}".` : ""}${pragma}("${tableName}")`);
return res;
}
}
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