https://github.com/altenwald/sqlparser

SQL Parsers
https://github.com/altenwald/sqlparser

erlang-libraries parser sql

Last synced: about 2 months ago
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SQL Parsers

• Host: GitHub
• URL: https://github.com/altenwald/sqlparser
• Owner: altenwald
• License: lgpl-2.1
• Created: 2017-04-28T14:27:32.000Z (over 7 years ago)
• Default Branch: master
• Last Pushed: 2018-04-10T12:19:10.000Z (almost 7 years ago)
• Last Synced: 2024-10-30T16:56:29.600Z (3 months ago)
• Topics: erlang-libraries, parser, sql
• Language: Erlang
• Size: 793 KB
• Stars: 5
• Watchers: 7
• Forks: 2
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
SQL Parser

==========

[![Build Status](https://img.shields.io/travis/altenwald/sqlparser/master.svg)](https://travis-ci.org/altenwald/sqlparser)

[![Codecov](https://img.shields.io/codecov/c/github/altenwald/sqlparser.svg)](https://codecov.io/gh/altenwald/sqlparser)

[![License: LGPL 2.1](https://img.shields.io/github/license/altenwald/sqlparser.svg)](https://raw.githubusercontent.com/altenwald/sqlparser/master/COPYING)

[![Hex](https://img.shields.io/hexpm/v/sqlparser.svg)](https://hex.pm/packages/sqlparser)

SQL Parsers let you to parse SQL strings to generic SQL records.

Usage

-----

If you want to use, only add this in `rebar.config` using [rebar3](https://rebar3.org):

```erlang

{deps, [

    {sqlparser, "0.3.1"}

]}.

```

The way to use it in the code:

```

-include_lib("sqlparser/include/sqlparser.hrl").

parsing(SQL) ->

    mysql_parser:parse(SQL).

```

You can use two different parsers at this moment: `mysql_parser` and `sql92_parser`. The second one was included from [sqlapi](https://github.com/flussonic/sqlapi). Both are intended to do the same but `mysql_parser` is more complete and less prone to fail and `sql92_parser` is faster (a lot more):

```

1> CompareNew = fun(Q) -> timer:tc(fun() -> sql92_parser:parse(Q) end) end.

2> CompareLegacy = fun(Q) -> timer:tc(fun() -> mysql_parser:parse(Q) end) end.

3> CompareNew("SELECT name, surname, nickname FROM users WHERE country = 'Spain'").

{63,

 {select,[{key,<<"name">>,<<"name">>,undefined},

          {key,<<"surname">>,<<"surname">>,undefined},

          {key,<<"nickname">>,<<"nickname">>,undefined}],

         [{table,<<"users">>,<<"users">>}],

         {condition,eq,

                    {key,<<"country">>,<<"country">>,undefined},

                    {value,undefined,<<"Spain">>}},

         undefined,undefined,undefined,undefined}}

4> CompareLegacy("SELECT name, surname, nickname FROM users WHERE country = 'Spain'").

{1803,

 {select,[{key,<<"name">>,<<"name">>,undefined},

          {key,<<"surname">>,<<"surname">>,undefined},

          {key,<<"nickname">>,<<"nickname">>,undefined}],

         [{table,<<"users">>,<<"users">>}],

         {condition,eq,

                    {key,<<"country">>,<<"country">>,undefined},

                    {value,undefined,<<"Spain">>}},

         undefined,undefined,undefined,undefined}}

```

For the same query `mysql_parser` takes 1803 microseconds (or 1,8 ms) and `sql92` takes 63 microseconds (or 0,06 ms).

Enjoy!