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Merged
JanJakes merged 7 commits into from
Oct 15, 2025
Merged

Dynamic database name #266

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b489eb7
Inject database name in queries dynamically
JanJakes Oct 14, 2025
3f2ffea
Save constant database name in information schema
JanJakes Oct 14, 2025
980dd5a
Correctly save and migrate database name in information schema tables
JanJakes Oct 14, 2025
047f71d
Fix SHOW DATABASES statement
JanJakes Oct 14, 2025
741915c
List information schema columns that store database name
JanJakes Oct 15, 2025
f99a904
Improve tests
JanJakes Oct 15, 2025
98d1ed8
Fix USE statement, add tests
JanJakes Oct 15, 2025
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143 changes: 107 additions & 36 deletions tests/WP_SQLite_Driver_Tests.php
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Original file line number Diff line number Diff line change
Expand Up @@ -5998,42 +5998,6 @@ public function testDatabaseNameEmpty(): void {
new WP_SQLite_Driver( $connection, '' );
}

public function testDatabaseNameMismatch(): void {
$pdo = new PDO( 'sqlite::memory:' );
$connection = new WP_SQLite_Connection( array( 'pdo' => $pdo ) );

// Create a driver with database name 'db-one'.
new WP_SQLite_Driver( $connection, 'db-one' );

// Create another driver with the same name - no errors.
new WP_SQLite_Driver( $connection, 'db-one' );

// Create a driver with a different name - failure.
$this->expectException( WP_SQLite_Driver_Exception::class );
$this->expectExceptionMessage( "Incorrect database name. The database was created with name 'db-one', but 'db-two' is used in the current session." );
new WP_SQLite_Driver( $connection, 'db-two' );
}

public function testDatabaseNameMismatchWithExistingInformationSchemaTableData(): void {
$pdo = new PDO( 'sqlite::memory:' );
$connection = new WP_SQLite_Connection( array( 'pdo' => $pdo ) );

// Create a driver with database name 'db-one'.
$driver = new WP_SQLite_Driver( $connection, 'db-one' );

// Create a table so that there is a record in the information schema.
$driver->query( 'CREATE TABLE t (id INT)' );

// Delete all variables, including driver version and database name.
$pdo->exec( sprintf( 'DELETE FROM %s', WP_SQLite_Driver::GLOBAL_VARIABLES_TABLE_NAME ) );

// Create a driver with a different name - failure.
// An information schema record with a different database name already exists.
$this->expectException( WP_SQLite_Driver_Exception::class );
$this->expectExceptionMessage( "Incorrect database name. The database was created with name 'db-one', but 'db-two' is used in the current session." );
new WP_SQLite_Driver( $connection, 'db-two' );
}

public function testSelectColumnNames(): void {
$this->assertQuery( 'CREATE TABLE t (id INT, name VARCHAR(255))' );
$this->assertQuery( 'INSERT INTO t (id, name) VALUES (1, "John"), (2, "Jane")' );
Expand Down Expand Up @@ -9244,4 +9208,111 @@ public function testCheckConstraintNotEnforced(): void {
$result[0]->{'Create Table'}
);
}

public function testDynamicDatabaseName(): void {
// Create a setter for the private property "$db_name".
$set_db_name = Closure::bind(
function ( $name ) {
$this->main_db_name = $name;
},
$this->engine,
WP_SQLite_Driver::class
);

// Default database name.
$result = $this->assertQuery( 'SELECT schema_name FROM information_schema.schemata ORDER BY schema_name' );
$this->assertEquals(
array(
(object) array( 'SCHEMA_NAME' => 'information_schema' ),
(object) array( 'SCHEMA_NAME' => 'wp' ),
),
$result
);

// Change the database name.
$set_db_name( 'wp_test_new' );
$result = $this->assertQuery( 'SELECT schema_name FROM information_schema.schemata ORDER BY schema_name' );
$this->assertEquals(
array(
(object) array( 'SCHEMA_NAME' => 'information_schema' ),
(object) array( 'SCHEMA_NAME' => 'wp_test_new' ),
),
$result
);
}

public function testDynamicDatabaseNameComplexScenario(): void {
// Create a setter for the private property "$db_name".
$set_db_name = Closure::bind(
function ( $name ) {
$this->main_db_name = $name;
},
$this->engine,
WP_SQLite_Driver::class
);

$this->assertQuery( 'CREATE TABLE t (id INT, db_name TEXT)' );
$this->assertQuery( 'INSERT INTO t (id, db_name) VALUES (1, "wp")' );
$this->assertQuery( 'INSERT INTO t (id, db_name) VALUES (2, "wp_test_new")' );
$this->assertQuery( 'INSERT INTO t (id, db_name) VALUES (3, "other")' );

$set_db_name( 'wp_test_new' );

$result = $this->assertQuery(
"SELECT sub.id, sub.table_schema, sub.table_name, sub.column_name
FROM (
SELECT * FROM information_schema.columns c
JOIN t ON t.db_name = CONCAT(COALESCE(c.table_schema, 'default'), '')
JOIN information_schema.schemata s ON s.schema_name = c.table_schema
WHERE c.table_name = 't'
) sub
ORDER BY ordinal_position"
);
$this->assertEquals(
array(
(object) array(
'id' => '2',
'TABLE_SCHEMA' => 'wp_test_new',
'TABLE_NAME' => 't',
'COLUMN_NAME' => 'id',
),
(object) array(
'id' => '2',
'TABLE_SCHEMA' => 'wp_test_new',
'TABLE_NAME' => 't',
'COLUMN_NAME' => 'db_name',
),
),
$result
);
}

public function testDynamicDatabaseNameWithWildcards(): void {
// Create a setter for the private property "$db_name".
$set_db_name = Closure::bind(
function ( $name ) {
$this->main_db_name = $name;
},
$this->engine,
WP_SQLite_Driver::class
);

// Default database name.
$result = $this->assertQuery(
'SELECT * FROM information_schema.schemata s'
);
$this->assertEquals( 'information_schema', $result[0]->SCHEMA_NAME );
$this->assertEquals( 'wp', $result[1]->SCHEMA_NAME );

// Default database name.
$set_db_name( 'wp_test_new' );
$result = $this->assertQuery(
'SELECT s.*
FROM information_schema.schemata s
LEFT JOIN information_schema.tables t ON t.table_schema = s.schema_name
ORDER BY s.schema_name'
);
$this->assertEquals( 'information_schema', $result[0]->SCHEMA_NAME );
$this->assertEquals( 'wp_test_new', $result[1]->SCHEMA_NAME );
}
}
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