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Jul 4, 2025
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Add a test for more complex information schema queries #208

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116 changes: 116 additions & 0 deletions tests/WP_SQLite_Driver_Tests.php
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Original file line number Diff line number Diff line change
Expand Up @@ -5859,4 +5859,120 @@ public function testDropIndex(): void {
$result = $this->engine->execute_sqlite_query( "PRAGMA index_list('t')" )->fetchAll( PDO::FETCH_ASSOC );
$this->assertCount( 0, $result );
}

public function testComplexInformationSchemaQueries(): void {
$create_table_query = <<<END
CREATE TABLE `wp_users` (
`ID` bigint(20) unsigned NOT NULL AUTO_INCREMENT,
`user_login` varchar(60) NOT NULL DEFAULT '',
`user_pass` varchar(255) NOT NULL DEFAULT '',
`user_nicename` varchar(50) NOT NULL DEFAULT '',
`user_email` varchar(100) NOT NULL DEFAULT '',
`user_url` varchar(100) NOT NULL DEFAULT '',
`user_registered` datetime NOT NULL DEFAULT '0000-00-00 00:00:00',
`user_activation_key` varchar(255) NOT NULL DEFAULT '',
`user_status` int(11) NOT NULL DEFAULT '0',
`display_name` varchar(250) NOT NULL DEFAULT '',
PRIMARY KEY (`ID`),
KEY `user_login_key` (`user_login`),
KEY `user_nicename` (`user_nicename`),
KEY `user_email` (`user_email`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci
END;

$this->assertQuery( $create_table_query );

// 1) JOIN multiple information schema tables.
$result = $this->assertQuery(
"SELECT
cols.DATA_TYPE,
stats.INDEX_NAME,
stats.COLUMN_NAME
FROM INFORMATION_SCHEMA.COLUMNS AS cols
JOIN INFORMATION_SCHEMA.STATISTICS AS stats
ON cols.TABLE_SCHEMA = stats.TABLE_SCHEMA
AND cols.TABLE_NAME = stats.TABLE_NAME
AND cols.COLUMN_NAME = stats.COLUMN_NAME
WHERE
cols.TABLE_SCHEMA = 'wp'
AND cols.TABLE_NAME = 'wp_users'
ORDER BY INDEX_NAME ASC"
);

$this->assertCount( 4, $result );
$this->assertEquals(
(object) array(
'DATA_TYPE' => 'bigint',
'INDEX_NAME' => 'PRIMARY',
'COLUMN_NAME' => 'ID',
),
$result[0]
);
$this->assertEquals(
(object) array(
'DATA_TYPE' => 'varchar',
'INDEX_NAME' => 'user_email',
'COLUMN_NAME' => 'user_email',
),
$result[1]
);
$this->assertEquals(
(object) array(
'DATA_TYPE' => 'varchar',
'INDEX_NAME' => 'user_login_key',
'COLUMN_NAME' => 'user_login',
),
$result[2]
);
$this->assertEquals(
(object) array(
'DATA_TYPE' => 'varchar',
'INDEX_NAME' => 'user_nicename',
'COLUMN_NAME' => 'user_nicename',
),
$result[3]
);

// 2) UNION, DISTINCT, and CTEs with information schema tables.
$result = $this->assertQuery(
"WITH
cols AS (
SELECT COLUMN_NAME AS column_name
FROM INFORMATION_SCHEMA.COLUMNS
WHERE TABLE_SCHEMA = 'wp' AND TABLE_NAME = 'wp_users'
),
indexes AS (
SELECT DISTINCT INDEX_NAME AS index_name
FROM INFORMATION_SCHEMA.STATISTICS
WHERE TABLE_SCHEMA = 'wp' AND TABLE_NAME = 'wp_users'
)
SELECT CONCAT(column_name, ' (column)') AS name
FROM cols
UNION ALL
SELECT CONCAT(index_name, ' (index)') AS name
FROM indexes
ORDER BY name"
);

$this->assertCount( 14, $result );
$this->assertEquals( 'ID (column)', $result[0]->name );
$this->assertEquals( 'PRIMARY (index)', $result[1]->name );
$this->assertEquals( 'display_name (column)', $result[2]->name );
$this->assertEquals( 'user_activation_key (column)', $result[3]->name );
$this->assertEquals( 'user_email (column)', $result[4]->name );
$this->assertEquals( 'user_email (index)', $result[5]->name );
$this->assertEquals( 'user_login (column)', $result[6]->name );
$this->assertEquals( 'user_login_key (index)', $result[7]->name );
$this->assertEquals( 'user_nicename (column)', $result[8]->name );
$this->assertEquals( 'user_nicename (index)', $result[9]->name );
$this->assertEquals( 'user_pass (column)', $result[10]->name );
$this->assertEquals( 'user_registered (column)', $result[11]->name );
$this->assertEquals( 'user_status (column)', $result[12]->name );
$this->assertEquals( 'user_url (column)', $result[13]->name );

// 3) SHOW CREATE TABLE should preserve all the CREATE TABLE metadata.
$result = $this->assertQuery( 'SHOW CREATE TABLE wp_users' );
$this->assertCount( 1, $result );
$this->assertEquals( $create_table_query, $result[0]->{'Create Table'} );
}
}