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Showing content from https://github.com/gajus/eslint-plugin-sql below:

gajus/eslint-plugin-sql: SQL linting rules for ESLint.

SQL linting rules for ESLint.

In its current form, the plugin has been designed and tested to work with Postgres codebase.

eslint-plugin-sql

Install ESLint.
Install eslint-plugin-sql plugin.

npm install eslint --save-dev
npm install eslint-plugin-sql --save-dev

Add plugins section and specify eslint-plugin-sql as a plugin.
Enable rules.

{
  "plugins": [
    "sql"
  ],
  "rules": {
    "sql/format": [
      2,
      {
        "ignoreExpressions": false,
        "ignoreInline": true,
        "ignoreTagless": true
      }
    ],
    "sql/no-unsafe-query": [
      2,
      {
        "allowLiteral": false
      }
    ]
  },
  "settings": {
    "sql": {
      "placeholderRule": "\\?"
    }
  }
}

A regex used to ignore placeholders or other fragments of the query that'd make it invalid SQL query, e.g.

If you are using ? placeholders in your queries, you must ignore \? pattern as otherwise the string is not going to be recognized as a valid SQL query.

This configuration is relevant for sql/no-unsafe-query to match queries containing placeholders as well as for sql/format when used with {ignoreTagless: false} configuration.

The --fix option on the command line automatically fixes problems reported by this rule.

Matches queries in template literals. Warns when query formatting does not match the configured format (see Options).

This rule is used to format the queries using sql-formatter.

The first option is an object with the following configuration.

configuration format default description ignoreExpressions boolean false Does not format template literals that contain expressions. ignoreInline boolean true Does not format queries that are written on a single line. ignoreStartWithNewLine boolean true Does not remove \n at the beginning of queries. ignoreTagless boolean true Does not format queries that are written without using sql tag. retainBaseIndent boolean true Uses the first line of the query as the base indent. sqlTag string sql Template tag name for SQL.

The second option is an object with the sql-formatter configuration.

configuration default description useTabs false Use tabs for indentation. tabWidth 2 Number of spaces per indentation. language sql Language of the query. keywordCase preserve Determines the case of keywords (preserve, upper, lower). dataTypeCase preserve Determines the case of data types (preserve, upper, lower). denseOperators false Decides whitespace around operators. identifierCase preserve Determines the case of identifiers (preserve, upper, lower). functionCase preserve Determines the case of functions (preserve, upper, lower).

The following patterns are considered problems:

sql.fragment`
  SELECT
    m1.ID
  FROM
    message m1
  WHERE
    m1.ID = ${message.id}
`
// Options: [{},{"identifierCase":"lower"}]
// Message: undefined
// Fixed code: 
// sql.fragment`
//   SELECT
//     m1.id
//   FROM
//     message m1
//   WHERE
//     m1.id = ${message.id}
// `

sql.fragment`
  SELECT id::NUMERIC
`
// Options: [{},{"dataTypeCase":"lower","language":"postgresql"}]
// Message: undefined
// Fixed code: 
// sql.fragment`
//   SELECT
//     id::numeric
// `

sql.fragment`
  SELECT
    COUNT(*)
  FROM
    message
  WHERE
    id = ${message.id}
`
// Options: [{},{"keywordCase":"lower"}]
// Message: undefined
// Fixed code: 
// sql.fragment`
//   select
//     COUNT(*)
//   from
//     message
//   where
//     id = ${message.id}
// `

sql.fragment`
  select
    COUNT(*)
  from
    message
  where
    id = ${message.id}
`
// Options: [{},{"keywordCase":"upper"}]
// Message: undefined
// Fixed code: 
// sql.fragment`
//   SELECT
//     COUNT(*)
//   FROM
//     message
//   WHERE
//     id = ${message.id}
// `

sql.fragment`
  ${null}
UPDATE message
SET
  messages = ${sql.jsonb(messages as unknown as SerializableValue[])}
WHERE id = ${message.id}
`;
// Options: [{},{"tabWidth":4}]
// Message: undefined
// Fixed code: 
// sql.fragment`
//   ${null}
//   UPDATE message
//   SET
//       messages = ${sql.jsonb(messages as unknown as SerializableValue[])}
//   WHERE
//       id = ${message.id}
// `;

await pool.query(sql.typeAlias('void')`
  UPDATE message
  SET
    messages = ${sql.jsonb(messages as unknown as SerializableValue[])}
  WHERE id = ${message.id}
`);
// Options: [{},{"tabWidth":4}]
// Message: undefined
// Fixed code: 
// await pool.query(sql.typeAlias('void')`
//   UPDATE message
//   SET
//       messages = ${sql.jsonb(messages as unknown as SerializableValue[])}
//   WHERE
//       id = ${message.id}
// `);

sql`
  SELECT
    1
`
// Options: [{},{"tabWidth":4}]
// Message: undefined
// Fixed code: 
// sql`
//   SELECT
//       1
// `

sql.type({ id: z.number() })`
  SELECT
    1
`
// Options: [{},{"tabWidth":4}]
// Message: undefined
// Fixed code: 
// sql.type({ id: z.number() })`
//   SELECT
//       1
// `

sql.typeAlias('void')`
  SELECT
    1
`
// Options: [{},{"tabWidth":4}]
// Message: undefined
// Fixed code: 
// sql.typeAlias('void')`
//   SELECT
//       1
// `

`SELECT 1`
// Options: [{"ignoreInline":false,"ignoreTagless":false},{}]
// Message: undefined
// Fixed code: 
// `
//   SELECT
//     1
// `

`SELECT 2`
// Options: [{"ignoreInline":false,"ignoreTagless":false},{"tabWidth":2}]
// Message: undefined
// Fixed code: 
// `
//   SELECT
//     2
// `

sql.unsafe`SELECT 3`
// Options: [{"ignoreInline":false},{}]
// Message: undefined
// Fixed code: 
// sql.unsafe`
//   SELECT
//     3
// `

sql.type()`SELECT 3`
// Options: [{"ignoreInline":false},{}]
// Message: undefined
// Fixed code: 
// sql.type()`
//   SELECT
//     3
// `

`SELECT ${'foo'} FROM ${'bar'}`
// Options: [{"ignoreInline":false,"ignoreTagless":false},{}]
// Message: undefined
// Fixed code: 
// `
//   SELECT
//     ${'foo'}
//   FROM
//     ${'bar'}
// `

const code = sql`
  SELECT
      foo
  FROM
      bar
`
// Options: [{},{}]
// Message: undefined
// Fixed code: 
// const code = sql`
//   SELECT
//     foo
//   FROM
//     bar
// `

SQL`SELECT 1`
// Options: [{"ignoreInline":false,"sqlTag":"SQL"},{}]
// Message: undefined
// Fixed code: 
// SQL`
//   SELECT
//     1
// `

The following patterns are not considered problems:

`
# A
## B
### C
`

sql`SELECT 1`
// Options: [{"ignoreInline":true},{}]

`SELECT 2`
// Options: [{"ignoreTagless":true},{}]

const code = sql`
  SELECT
    ${'foo'}
  FROM
    ${'bar'}
`
// Options: [{"ignoreExpressions":true,"ignoreInline":false,"ignoreTagless":false},{}]

const code = sql`
  SELECT
    ${'foo'}
  FROM
    ${'bar'}
`
// Options: [{},{}]

const code = sql`
  DROP TABLE foo
`
// Options: [{},{}]

const code = sql`
  DROP TABLE foo;

  DROP TABLE foo;
`
// Options: [{},{}]

Disallows use of SQL inside of template literals without the sql tag.

The sql tag can be anything, e.g.

The first option is an object with the following configuration.

configuration format default description allowLiteral boolean false Controls whether sql tag is required for template literals containing literal queries, i.e. template literals without expressions. sqlTag string sql Template tag name for SQL.

The following patterns are considered problems:

`SELECT 1`
// Message: undefined

`SELECT ${'foo'}`
// Message: undefined

foo`SELECT ${'bar'}`
// Message: undefined

`SELECT ?`
// Message: undefined

foo`SELECT ${'bar'}`
// Options: [{"sqlTag":"SQL"}]
// Message: undefined

The following patterns are not considered problems:

sql.unsafe`SELECT 3`

`SELECT 1`
// Options: [{"allowLiteral":true}]

sql`SELECT 1`

sql`SELECT ${'foo'}`

SQL`SELECT ${'bar'}`
// Options: [{"sqlTag":"SQL"}]

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