postgresql/no-update-without-from-binding

Why this matters

An `UPDATE ... FROM other_table` without a `WHERE` joins every row of the target with every row of the source, then keeps the last assignment per target row. The result is almost never what the author meant. Plain `UPDATE` (no `FROM`) is out of scope — see `require-where-in-update`.

Examples

UPDATE t SET x = u.x FROM u;

UPDATE t SET x = u.x FROM u WHERE t.id = u.t_id;

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/no-update-without-from-binding": "error",
    },
  },
];

Options

This rule has no options.