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https://github.com/joereynolds/sql-lint

An SQL linter
https://github.com/joereynolds/sql-lint

lint linter mysql postgres postgresql sql sql-lint

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An SQL linter

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README

        

# sql-lint

`sql-lint` will do sanity checks on your queries as well as bring errors back from the DB.
If you worry about forgetting `WHERE`s on a `DELETE` or borking your data with unexpected characters, then `sql-lint` is for you.

[Read the documentation for a complete walkthrough](https://sql-lint.readthedocs.io/en/latest/files/introduction.html)

![Imgur](https://i.imgur.com/rJ3h34b.png)

![Imgur](https://i.imgur.com/nqi1MnT.gif)

## Installation

```
npm i -g sql-lint
# or
yarn global add sql-lint
```

Or download a [binary](https://github.com/joereynolds/sql-lint/releases)

## Usage

`sql-lint` works on files, directories and stdin.

```
# Will lint all .sql files recursively from the current directory
sql-lint .

# Lints the create-person.sql file
sql-lint create-person.sql

# Lints stdin
echo 'DELETE FROM person;' | sql-lint
```

## Programmatically

`sql-lint` can also be used within your js/ts files (though admittedly it's stronger as a cli command).

```
npm i sql-lint
# or
yarn add sql-lint
```

```
import sqlLint from 'sql-lint'

// using async/await

const errors = await sqlLint({
sql: 'SELECT my_column FROM my_table',
})

// or using promise

sqlLint({ sql: 'SELECT my_column FROM my_table' }).then(errors => {
for (const error of errors) {
// do something
}
})
```

## Supported Editors

If your editor supports external tools, then it supports `sql-lint`.
Below is the list that have direct support for `sql-lint` either through plugins or configuration.

| Editor | Plugin |
| ----------- | ----------- |
| Neovim | [Ale](https://github.com/dense-analysis/ale/) |
| Vim | [Ale](https://github.com/dense-analysis/ale/) |
| VS Code | [Inline SQL](https://marketplace.visualstudio.com/items?itemName=qufiwefefwoyn.inline-sql-syntax) |

## Checks

A quick rundown of the checks is below but you should [read the documentation](https://sql-lint.readthedocs.io/en/latest/files/checks.html)
for an exhaustive list.

`sql-lint` comes with its own suite of checks. It
also returns any errors from the SQL server you have connected to. Generally
you'll find that the errors from `sql-lint` are more informative than those from
the server. That said, you will still want errors from the server as it covers
more cases and will catch things that `sql-lint` does not.

unmatched-parentheses

Shown when a query has an unbalanced amount of parentheses.

```
test/test-files//test.sql:16 [sql-lint: unmatched-parentheses] Unmatched parentheses.
```

missing-where

Shown when a `DELETE` statement is missing a `WHERE` clause.

```
test/test-files/test.sql:20 [sql-lint: missing-where] DELETE statement missing WHERE clause.
```

invalid-drop-option

Shown when an invalid option is given to the `DROP` statement.

```
test/test-files/test.sql:22 [sql-lint: invalid-drop-option] Option 'thing' is not a valid option, must be one of '["database","event","function","index","logfile","procedure","schema","server","table","view","tablespace","trigger"]'.
```

invalid-create-option

Shown when an invalid option is given to the `CREATE` statement.

```
:24 [sql-lint: invalid-create-option] Option 'test' is not a valid option, must be one of '["algorithm","database","definer","event","function","index","or","procedure","server","table","tablespace","temporary","trigger","user","unique","view"]'.
```

invalid-truncate-option

Shown when an invalid option is given to the `TRUNCATE` statement.

```
test/test-files/test.sql:26 [sql-lint: invalid-truncate-option] Option 'something' is not a valid option, must be one of '["table"]'.
```

invalid-alter-option

Shown when an invalid option is given to the `ALTER` statement.

```
test/test-files/test.sql:28 [sql-lint: invalid-alter-option] Option 'mlady' is not a valid option, must be one of '["column","online","offline","ignore","database","event","function","procedure","server","table","tablespace","view"]'.
```

odd-code-point

Shown when there are unsupported/unusual* code points in your code.

*This check came about whilst working Microsoft Excel. Microsoft likes to
add a lot of zany characters which can subtly break your data without you
realising.

```
test/test-files//test.sql:30 [sql-lint: odd-code-point] Unexpected code point.
```


invalid-limit-quantifier

Shown when you specify something other than a number to the `LIMIT` statement.

```
test/test-files//test.sql:32 [sql-lint: invalid-limit-quantifier] Argument 'test' is not a valid quantifier for LIMIT clause.
```

hungarian-notation

Shown when the string `sp_` or `tbl_` is present in the query.

```
test/test-files/test.sql:34 [sql-lint: hungarian-notation] Hungarian notation present in query
```

trailing-whitespace

Shown when a query has trailing whitespace.

```
test/test-files/test.sql:34 [sql-lint: trailing-whitespace] Trailing whitespace
```

## Documentation

To find out more, [read the documentation](https://sql-lint.readthedocs.io/)