postgresql/no-char-type

Why this matters

PostgreSQL pads stored `char(n)` values to `n` with trailing spaces and silently trims them on read. The padding surprises comparisons and sorts. Use `text` (and a `CHECK` constraint when you need a length).

Examples

CREATE TABLE t (code CHAR(3));

CREATE TABLE t (code BPCHAR(3));

CREATE TABLE t (code TEXT);

CREATE TABLE t (code TEXT CHECK (length(code) = 3));

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-char-type": "warn",
    },
  },
];

Options

This rule has no options.