_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
  79681252_8ee8_bfc6_6b39_f45e217a1440["_prepare()"]
  7bebbd50_10c8_bbd4_74e2_111a51da2257["GelSelectBase"]
  79681252_8ee8_bfc6_6b39_f45e217a1440 -->|defined in| 7bebbd50_10c8_bbd4_74e2_111a51da2257
  df701b1d_68b5_6c22_c96e_0626bf7539b3["prepare()"]
  df701b1d_68b5_6c22_c96e_0626bf7539b3 -->|calls| 79681252_8ee8_bfc6_6b39_f45e217a1440
  style 79681252_8ee8_bfc6_6b39_f45e217a1440 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

drizzle-orm/src/gel-core/query-builders/select.ts lines 1063–1080

	_prepare(name?: string): GelSelectPrepare<this> {
		const { session, config, dialect, joinsNotNullableMap, cacheConfig, usedTables } = this;
		if (!session) {
			throw new Error('Cannot execute a query on a query builder. Please use a database instance instead.');
		}
		return tracer.startActiveSpan('drizzle.prepareQuery', () => {
			const fieldsList = orderSelectedFields<GelColumn>(config.fields);
			const query = session.prepareQuery<
				PreparedQueryConfig & { execute: TResult }
			>(dialect.sqlToQuery(this.getSQL()), fieldsList, name, true, undefined, {
				type: 'select',
				tables: [...usedTables],
			}, cacheConfig);
			query.joinsNotNullableMap = joinsNotNullableMap;

			return query;
		});
	}