Provides facilities to read table names and table columns from a database using PDO.

database, sql, db, mysql, schema, sqlite, postgresql, pdo, pgsql, postgres, sql server, sqlserver, sqlsrv, ddl, aura, php



Provides facilities to read table names and table columns from a database using a PDO connection.



This library requires PHP 5.3 or later; we recommend using the latest available version of PHP as a matter of principle. It has no userland dependencies.

It is installable and autoloadable via Composer as aura/sqlschema.

Alternatively, download a release or clone this repository, then require or include its autoload.php file.


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To run the unit tests at the command line, issue phpunit at the package root. (This requires PHPUnit to be available as phpunit.)

This library attempts to comply with PSR-1, PSR-2, and PSR-4. If you notice compliance oversights, please send a patch via pull request.


To ask questions, provide feedback, or otherwise communicate with the Aura community, please join our Google Group, follow @auraphp on Twitter, or chat with us on #auraphp on Freenode.

Getting Started


Instantiate a driver-specific schema object with a matching PDO instance:

use Aura\SqlSchema\ColumnFactory;
use Aura\SqlSchema\MysqlSchema; // for MySQL
use Aura\SqlSchema\PgsqlSchema; // for PostgreSQL
use Aura\SqlSchema\SqliteSchema; // for Sqlite
use Aura\SqlSchema\SqlsrvSchema; // for Microsoft SQL Server
use PDO;

// a PDO connection
$pdo = new PDO(...);

// a column definition factory
$column_factory = new ColumnFactory();

// the schema discovery object
$schema = new MysqlSchema($pdo, $column_factory);

Fetching Table Lists

To get a list of tables in the database, issue fetchTableList():

$tables = $schema->fetchTableList();
foreach ($tables as $table) {
    echo $table . PHP_EOL;

Fetching Column Information

To get information about the columns in a table, issue fetchTableCols():

$cols = $schema->fetchTableCols('table_name');
foreach ($cols as $name => $col) {
    echo "Column $name is of type "
       . $col->type
       . " with a size of "
       . $col->size
       . PHP_EOL;

Each column description is a Column object with the following properties:

  • name: (string) The column name

  • type: (string) The column data type. Data types are as reported by the database.

  • size: (int) The column size.

  • scale: (int) The number of decimal places for the column, if any.

  • notnull: (bool) Is the column marked as NOT NULL?

  • default: (mixed) The default value for the column. Note that sometimes this will be null if the underlying database is going to set a timestamp automatically.

  • autoinc: (bool) Is the column auto-incremented?

  • primary: (bool) Is the column part of the primary key?