_prepare() — drizzle-orm Function Reference

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

Function typescript DrizzleORM QueryBuilders calls 1 called by 2

Entity Profile

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

Dependency Diagram

graph TD
  5ec7dcb3_48df_9e64_7058_75e57a02ef57["_prepare()"]
  f9a91e6d_a33f_bd5f_9c24_96be62c66b94["GelRelationalQuery"]
  5ec7dcb3_48df_9e64_7058_75e57a02ef57 -->|defined in| f9a91e6d_a33f_bd5f_9c24_96be62c66b94
  eace7af1_70c6_3521_c012_8025e2549e26["prepare()"]
  eace7af1_70c6_3521_c012_8025e2549e26 -->|calls| 5ec7dcb3_48df_9e64_7058_75e57a02ef57
  782e8ccb_096f_8d34_a26e_e3bb8b130abc["execute()"]
  782e8ccb_096f_8d34_a26e_e3bb8b130abc -->|calls| 5ec7dcb3_48df_9e64_7058_75e57a02ef57
  d60c8dca_bce8_adcf_14af_63da6ec5ea7a["_toSQL()"]
  5ec7dcb3_48df_9e64_7058_75e57a02ef57 -->|calls| d60c8dca_bce8_adcf_14af_63da6ec5ea7a
  style 5ec7dcb3_48df_9e64_7058_75e57a02ef57 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

drizzle-orm/src/gel-core/query-builders/query.ts lines 90–110

	_prepare(name?: string): GelPreparedQuery<PreparedQueryConfig & { execute: TResult }> {
		return tracer.startActiveSpan('drizzle.prepareQuery', () => {
			const { query, builtQuery } = this._toSQL();

			return this.session.prepareQuery<PreparedQueryConfig & { execute: TResult }>(
				builtQuery,
				undefined,
				name,
				true,
				(rawRows, mapColumnValue) => {
					const rows = rawRows.map((row) =>
						mapRelationalRow(this.schema, this.tableConfig, row, query.selection, mapColumnValue)
					);
					if (this.mode === 'first') {
						return rows[0] as TResult;
					}
					return rows as TResult;
				},
			);
		});
	}