README

PHP library that allows linking queries from diferent physical databases using mysql pdo database connections.

What is this thing

I'll explain once I get it done.

Install

To add as a dependency using composer:

composer require antevenio/pdo-mysql-query-linker

Usage example

<?php
$originPdo = new PDO('mysql:host=host1;dbname=kidsshouting', 'myuser', 'mypass');
$targetPdo = new PDO('mysql:host=host2;dbname=kidsshouting', 'myuser', 'mypass');

$linker = (new \PdoMysqlQueryLinker\Linker\Factory())->create()
    ->origin(
        $originPdo, 
        "select * from table_in_origin where column = 'something'"
        )
    ->target(
        $targetPdo, 
        "delete from table_in_destination inner join {origin} using(column)"
        );

// Get a limit clause block based iterator
$iterator = $linker->getIterator(10000);
foreach ($iterator as $row) {
    // do your stuff;
}
$linker->close();

// Get a pdo statement
$stmt = $linker->execute();
$rows = $stmt->fetchAll(\PDO::FETCH_ASSOC);
foreach ($rows as $row) {
    // do your stuff;
}
$linker->close();

// Get just the resolved query to run in destination adapter
$query = $linker->getQuery();
$stmt = $targetPdo->query($query);
$linker->close();