postgresql/require-if-exists

Why this matters

An `IF EXISTS` `DROP` is idempotent — re-running the migration after a partial run does not error. Covers `DROP TABLE`, `DROP INDEX`, `DROP FUNCTION`, `DROP TRIGGER`, `DROP DATABASE`, `DROP SCHEMA`, `DROP ROLE`. Other statements are out of scope.

Examples

DROP TABLE foo;

DROP INDEX idx_foo;

DROP FUNCTION fn();

DROP TABLE IF EXISTS foo;

DROP INDEX IF EXISTS idx_foo;

DROP FUNCTION IF EXISTS fn();

Configure it

// eslint.config.js
import postgresql from "eslint-plugin-postgresql";

export default [
  {
    files: ["**/*.sql"],
    languageOptions: {
      parser: postgresql.configs.recommended.languageOptions.parser,
    },
    plugins: { postgresql },
    rules: {
      "postgresql/require-if-exists": "warn",
    },
  },
];

Options

This rule has no options.