SqliteAlterTableAlterCompositePrimaryKeyConvertor Class — drizzle-orm Architecture

Source Code

drizzle-kit/src/sqlgenerator.ts lines 3218–3244

class SqliteAlterTableAlterCompositePrimaryKeyConvertor extends Convertor {
	can(statement: JsonStatement, dialect: Dialect): boolean {
		return statement.type === 'alter_composite_pk' && dialect === 'sqlite';
	}

	convert(statement: JsonAlterCompositePK) {
		let msg = '/*\n';
		msg += 'SQLite does not support altering primary key\n';
		msg += 'You can do it in 3 steps with drizzle orm:\n';
		msg += ' - create new mirror table with needed pk, rename current table to old_table, generate SQL\n';
		msg += ' - migrate old data from one table to another\n';
		msg += ' - delete old_table in schema, generate sql\n\n';
		msg += 'or create manual migration like below:\n\n';
		msg += 'ALTER TABLE table_name RENAME TO old_table;\n';
		msg += 'CREATE TABLE table_name (\n';
		msg += '\tcolumn1 datatype [ NULL | NOT NULL ],\n';
		msg += '\tcolumn2 datatype [ NULL | NOT NULL ],\n';
		msg += '\t...\n';
		msg += '\tPRIMARY KEY (pk_col1, pk_col2, ... pk_col_n)\n';
		msg += ' );\n';
		msg += 'INSERT INTO table_name SELECT * FROM old_table;\n\n';
		msg += "Due to that we don't generate migration automatically and it has to be done manually\n";
		msg += '*/\n';

		return msg;
	}
}