_prepare() — drizzle-orm Function Reference

Architecture documentation for the _prepare() function in select.ts from the drizzle-orm codebase.

Function typescript DrizzleORM QueryBuilders called by 1

Entity Profile

DrizzleORM→ QueryBuilders→ _prepare() — drizzle-orm Function Reference

Dependency Diagram

graph TD
  e571edf5_8216_8caf_3f29_85d5262e9bdf["_prepare()"]
  ca52fda7_20e9_67a9_3dbd_c1b59a433dbf["SQLiteSelectBase"]
  e571edf5_8216_8caf_3f29_85d5262e9bdf -->|defined in| ca52fda7_20e9_67a9_3dbd_c1b59a433dbf
  a2199128_0142_2400_c983_fcad20f10ae7["prepare()"]
  a2199128_0142_2400_c983_fcad20f10ae7 -->|calls| e571edf5_8216_8caf_3f29_85d5262e9bdf
  style e571edf5_8216_8caf_3f29_85d5262e9bdf fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

drizzle-orm/src/sqlite-core/query-builders/select.ts lines 911–930

	_prepare(isOneTimeQuery = true): SQLiteSelectPrepare<this> {
		if (!this.session) {
			throw new Error('Cannot execute a query on a query builder. Please use a database instance instead.');
		}
		const fieldsList = orderSelectedFields<SQLiteColumn>(this.config.fields);
		const query = this.session[isOneTimeQuery ? 'prepareOneTimeQuery' : 'prepareQuery'](
			this.dialect.sqlToQuery(this.getSQL()),
			fieldsList,
			'all',
			true,
			undefined,
			{
				type: 'select',
				tables: [...this.usedTables],
			},
			this.cacheConfig,
		);
		query.joinsNotNullableMap = this.joinsNotNullableMap;
		return query as ReturnType<this['prepare']>;
	}