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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/)