Database: Add support for SET STATEMENT in wpdb::get_table_from_query().

MariaDB supports setting various parameters for queries. This commit ensures that `wpdb` can properly retrieve the table name from such queries.

Reference: [https://mariadb.com/docs/server/reference/sql-statements/administrative-sql-statements/set-commands/set-statement MariaDB Documentation: SET STATEMENT].

Follow-up to [30345].

Props dd32.
Fixes #63777.
Built from https://develop.svn.wordpress.org/trunk@60622


git-svn-id: http://core.svn.wordpress.org/trunk@59958 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/class-wpdb.php

@@ -3803,6 +3803,9 @@ class wpdb {
 		// Strip everything between parentheses except nested selects.
 		$query = preg_replace( '/\((?!\s*select)[^(]*?\)/is', '()', $query );
 
+		// Strip any leading SET STATEMENT statements.
+		$query = preg_replace( '/^SET STATEMENT.+?\sFOR\s+/is', '', $query );
+
 		// Quickly match most common queries.
 		if ( preg_match(
 			'/^\s*(?:'

wp-includes/version.php

@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.9-alpha-60621';
+$wp_version = '6.9-alpha-60622';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.