SQL Formatter

This repository contains the C# port of the popular Java SQL formatter

This does not support:

Stored procedures.
Changing of the delimiter type to something else than ;.

Usage

NuGet

To install the Hogimn.Sql.Formatter package with NuGet, you can use the following command in your terminal or command prompt.

dotnet add package Hogimn.Sql.Formatter --version 1.0.1

For more details, visit the NuGet Gallery page.

Examples

You can easily use SQL.Formatter.SqlFormatter :

SqlFormatter.Format("SELECT * FROM table1")

This will output:

SELECT
  *
FROM
  table1

You can also pass FormatConfig object built by builder:

SqlFormatter.Format("SELECT * FROM tbl",
  FormatConfig.Builder()
    .Indent("    ") // Defaults to two spaces
    .Uppercase(true) // Defaults to false (not safe to use when SQL dialect has case-sensitive identifiers)
    .LinesBetweenQueries(2) // Defaults to 1
    .MaxColumnLength(100) // Defaults to 50
    .Params(new List<string>{"a", "b", "c"}) // Dictionary or List. See Placeholders replacement.
    .Build());
);

Dialect

You can pass dialect SQL.Formatter.Language.Dialect or String to SqlFormatter.Of :

SqlFormatter
    .Of(Dialect.N1ql)  // Recommended
     //.Of("n1ql")      // String can be passed
    .Format("SELECT *");

SQL formatter supports the following dialects:

sql - Standard SQL (Default)
mariadb - MariaDB
mysql - MySQL
postgresql - PostgreSQL
db2 - IBM DB2
plsql - Oracle PL/SQL
n1ql - Couchbase N1QL
redshift - Amazon Redshift
spark - Spark
tsql - SQL Server Transact-SQL

I’m currently using the default dialect for Oracle SQL, and it performs well for my needs.
As such, I don’t have the motivation to maintain or expand support for other dialects.
If you require support for additional dialects, please consider contributing to this project.

Extend formatters

Formatters can be extended as below :

SqlFormatter
    .Of(Dialect.MySql)
    .Extend(cfg => cfg.PlusOperators("=>"))
    .Format("SELECT * FROM table WHERE A => 4")

Then it results in:

SELECT
  *
FROM
  table
WHERE
  A => 4

Placeholders replacement

You can pass List or Dictionary to Format :

// Named placeholders
Dictionary<string, string> namedParams = new Dictionary<string, string>();
namedParams.Add("foo", "'bar'");
SqlFormatter.Of(Dialect.TSql).Format("SELECT * FROM tbl WHERE foo = @foo", namedParams);

// Indexed placeholders
SqlFormatter.Format("SELECT * FROM tbl WHERE foo = ?", new List<string> {"'bar'"});

Both result in:

SELECT
  *
FROM
  tbl
WHERE
  foo = 'bar'