alter

/**
 * Create a factory for building ALTER statements.
 *
 * Provides a unified entry point for all ALTER operations:
 * - alter()->table() - ALTER TABLE
 * - alter()->index() - ALTER INDEX
 * - alter()->view() - ALTER VIEW
 * - alter()->materializedView() - ALTER MATERIALIZED VIEW
 * - alter()->sequence() - ALTER SEQUENCE
 * - alter()->schema() - ALTER SCHEMA
 * - alter()->role() - ALTER ROLE
 * - alter()->function() - ALTER FUNCTION
 * - alter()->procedure() - ALTER PROCEDURE
 * - alter()->trigger() - ALTER TRIGGER
 * - alter()->extension() - ALTER EXTENSION
 * - alter()->enumType() - ALTER TYPE (enum)
 * - alter()->domain() - ALTER DOMAIN
 *
 * Rename operations are also under alter():
 * - alter()->index('old')->renameTo('new')
 * - alter()->view('old')->renameTo('new')
 * - alter()->schema('old')->renameTo('new')
 * - alter()->role('old')->renameTo('new')
 * - alter()->trigger('old')->on('table')->renameTo('new')
 *
 * Example: alter()->table('users')->addColumn(col_def('email', column_type_text()))
 * Example: alter()->sequence('user_id_seq')->restart(1000)
 */
alter() : AlterFactory