Fix deprecation warnings in existing tests

Author: JanJakes

tests/mysql/WP_MySQL_Server_Suite_Lexer_Tests.php

@@ -21,7 +21,7 @@ public function test_tokenize_mysql_test_suite(): void {
 		}
 
 		try {
-			while ( ( $record = fgetcsv( $handle ) ) !== false ) {
+			while ( ( $record = fgetcsv( $handle, null, ',', '"', '\\' ) ) !== false ) {
 				$query  = $record[0];
 				$lexer  = new WP_MySQL_Lexer( $query );
 				$tokens = $lexer->remaining_tokens();

tests/mysql/WP_MySQL_Server_Suite_Parser_Tests.php

@@ -75,7 +75,7 @@ public function data_parse_mysql_test_suite(): Generator {
 		try {
 			$data  = array();
 			$batch = 1;
-			while ( ( $record = fgetcsv( $handle ) ) !== false ) {
+			while ( ( $record = fgetcsv( $handle, null, ',', '"', '\\' ) ) !== false ) {
 				$data[] = $record;
 				if ( count( $data ) === 1000 ) {
 					yield "batch-$batch" => array( $data );

wp-includes/sqlite-ast/class-wp-sqlite-driver.php

@@ -1598,7 +1598,7 @@ private function execute_update_statement( WP_Parser_Node $node ): void {
 		 *         UPDATE t, information_schema.columns c SET t.column = c.column ...
 		 */
 		foreach ( $table_alias_map as $alias => $data ) {
-			if ( 'information_schema' === strtolower( $data['database'] ) ) {
+			if ( 'information_schema' === strtolower( $data['database'] ?? '' ) ) {
 				throw $this->new_access_denied_to_information_schema_exception();
 			}
 		}
@@ -2281,7 +2281,7 @@ private function execute_show_statement( WP_Parser_Node $node ): void {
 							'flags'       => array( 'not_null' ),
 							'table'       => '',
 							'name'        => 'Create Table',
-							'len'         => strlen( $sql ),
+							'len'         => strlen( $sql ?? '' ),
 							'precision'   => 31,
 						),
 					);