Implement SHOW TABLE STATUS

Author: JanJakes

tests/WP_SQLite_Driver_Tests.php

@@ -768,6 +768,14 @@ public function testShowTableStatusLike() {
 			);"
 		);
 
+		$this->assertQuery(
+			"CREATE TABLE _another_table (
+				ID INTEGER PRIMARY KEY AUTO_INCREMENT NOT NULL,
+				option_name TEXT NOT NULL default '',
+				option_value TEXT NOT NULL default ''
+			);"
+		);
+
 		$this->assertQuery(
 			"SHOW TABLE STATUS LIKE '_tmp_table%';"
 		);
@@ -781,6 +789,40 @@ public function testShowTableStatusLike() {
 		);
 	}
 
+	public function testShowTableStatusWhere() {
+		// Created in setUp() function
+		$this->assertQuery( 'DROP TABLE _options' );
+		$this->assertQuery( 'DROP TABLE _dates' );
+
+		$this->assertQuery(
+			"CREATE TABLE _tmp_table1 (
+				ID INTEGER PRIMARY KEY AUTO_INCREMENT NOT NULL,
+				option_name TEXT NOT NULL default '',
+				option_value TEXT NOT NULL default ''
+			);"
+		);
+
+		$this->assertQuery(
+			"CREATE TABLE _tmp_table2 (
+				ID INTEGER PRIMARY KEY AUTO_INCREMENT NOT NULL,
+				option_name TEXT NOT NULL default '',
+				option_value TEXT NOT NULL default ''
+			);"
+		);
+
+		$this->assertQuery(
+			"SHOW TABLE STATUS WHERE SUBSTR(table_name, 11, 1) = '1'"
+		);
+		$this->assertCount(
+			1,
+			$this->engine->get_query_results()
+		);
+		$this->assertEquals(
+			'_tmp_table1',
+			$this->engine->get_query_results()[0]->Name
+		);
+	}
+
 	public function testCreateTable() {
 		$result = $this->assertQuery(
 			"CREATE TABLE wptests_users (

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

@@ -1333,6 +1333,7 @@ private function execute_drop_table_statement( WP_Parser_Node $node ): void {
 			$this->execute_sqlite_query( $query );
 		}
 		$this->results = $this->last_exec_returned;
+		$this->information_schema_builder->record_drop_table( $node );
 	}
 
 	private function execute_show_statement( WP_Parser_Node $node ): void {
@@ -1379,6 +1380,9 @@ private function execute_show_statement( WP_Parser_Node $node ): void {
 					)
 				);
 				return;
+			case WP_MySQL_Lexer::TABLE_SYMBOL:
+				$this->execute_show_table_status_statement( $node );
+				break;
 			default:
 				// @TODO
 		}
@@ -1413,6 +1417,75 @@ private function execute_show_index_statement( string $table_name ): void {
 		$this->set_results_from_fetched_data( $index_info );
 	}
 
+	private function execute_show_table_status_statement( WP_Parser_Node $node ): void {
+		// @TODO: Handle FROM/IN db_name.
+
+		// LIKE and WHERE clauses.
+		$like_or_where = $node->get_child_node( 'likeOrWhere' );
+		if ( null !== $like_or_where ) {
+			$like_clause  = $like_or_where->get_child_node( 'likeClause' );
+			$where_clause = $like_or_where->get_child_node( 'whereClause' );
+
+			if ( null !== $like_clause ) {
+				$like_value = $this->translate(
+					$like_clause->get_child_node( 'textStringLiteral' )
+				);
+			}
+
+			if ( null !== $where_clause ) {
+				$where_value = $this->translate(
+					$where_clause->get_child_node( 'expr' )
+				);
+			}
+		}
+
+		// Fetch table information.
+		$table_info = $this->execute_sqlite_query(
+			sprintf(
+				"
+					SELECT *
+					FROM _mysql_information_schema_tables
+					WHERE table_type = 'BASE TABLE'
+					%s
+					%s
+				",
+				isset( $like_value ) ? "AND table_name LIKE {$like_value} ESCAPE '\\'" : '',
+				isset( $where_value ) ? "AND {$where_value}" : ''
+			)
+		)->fetchAll( PDO::FETCH_ASSOC );
+
+		if ( false === $table_info ) {
+			$this->set_results_from_fetched_data( array() );
+		}
+
+		// Format the results.
+		$tables = array();
+		foreach ( $table_info as $value ) {
+			$tables[] = (object) array(
+				'Name'            => $value['TABLE_NAME'],
+				'Engine'          => $value['ENGINE'],
+				'Version'         => $value['VERSION'],
+				'Row_format'      => $value['ROW_FORMAT'],
+				'Rows'            => $value['TABLE_ROWS'],
+				'Avg_row_length'  => $value['AVG_ROW_LENGTH'],
+				'Data_length'     => $value['DATA_LENGTH'],
+				'Max_data_length' => $value['MAX_DATA_LENGTH'],
+				'Index_length'    => $value['INDEX_LENGTH'],
+				'Data_free'       => $value['DATA_FREE'],
+				'Auto_increment'  => $value['AUTO_INCREMENT'],
+				'Create_time'     => $value['CREATE_TIME'],
+				'Update_time'     => $value['UPDATE_TIME'],
+				'Check_time'      => $value['CHECK_TIME'],
+				'Collation'       => $value['TABLE_COLLATION'],
+				'Checksum'        => $value['CHECKSUM'],
+				'Create_options'  => $value['CREATE_OPTIONS'],
+				'Comment'         => $value['TABLE_COMMENT'],
+			);
+		}
+
+		$this->set_results_from_fetched_data( $tables );
+	}
+
 	private function execute_describe_statement( WP_Parser_Node $node ): void {
 		$table_name = $this->unquote_sqlite_identifier(
 			$this->translate( $node->get_child_node( 'tableRef' ) )