_prepare() — drizzle-orm Function Reference

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

Function typescript DrizzleORM SQLDialects calls 1 called by 2

Entity Profile

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

Dependency Diagram

graph TD
  a62147a3_7eb0_2b31_787d_da8177a40ee4["_prepare()"]
  765d2955_5987_484a_db1f_a5727e426ad2["SQLiteRelationalQuery"]
  a62147a3_7eb0_2b31_787d_da8177a40ee4 -->|defined in| 765d2955_5987_484a_db1f_a5727e426ad2
  4549f4ce_6140_df00_a3f7_c43c0a84d21d["prepare()"]
  4549f4ce_6140_df00_a3f7_c43c0a84d21d -->|calls| a62147a3_7eb0_2b31_787d_da8177a40ee4
  64fbd690_3de5_c1f9_8363_b32c729c0fb2["executeRaw()"]
  64fbd690_3de5_c1f9_8363_b32c729c0fb2 -->|calls| a62147a3_7eb0_2b31_787d_da8177a40ee4
  d1659fa8_c51b_4fc2_d1e7_68b922ae9ab7["_toSQL()"]
  a62147a3_7eb0_2b31_787d_da8177a40ee4 -->|calls| d1659fa8_c51b_4fc2_d1e7_68b922ae9ab7
  style a62147a3_7eb0_2b31_787d_da8177a40ee4 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

drizzle-orm/src/sqlite-core/query-builders/query.ts lines 142–162

	_prepare(
		isOneTimeQuery = false,
	): SQLitePreparedQuery<PreparedQueryConfig & { type: TType; all: TResult; get: TResult; execute: TResult }> {
		const { query, builtQuery } = this._toSQL();

		return this.session[isOneTimeQuery ? 'prepareOneTimeQuery' : 'prepareQuery'](
			builtQuery,
			undefined,
			this.mode === 'first' ? 'get' : 'all',
			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;
			},
		) as SQLitePreparedQuery<PreparedQueryConfig & { type: TType; all: TResult; get: TResult; execute: TResult }>;
	}