Fix QueryTable error when getting metadata for an empty SQLite table

src/DataSet/QueryTable.php

@@ -143,14 +143,7 @@ protected function createTableMetaData()
                 // get column names from data
                 $columns = \array_keys($this->data[0]);
             } else {
-                // if no rows found, get column names from database
-                $pdoStatement = $this->databaseConnection->getConnection()->prepare('SELECT column_name FROM information_schema.COLUMNS WHERE table_schema=:schema AND table_name=:table');
-                $pdoStatement->execute([
-                    'table'  => $this->tableName,
-                    'schema' => $this->databaseConnection->getSchema()
-                ]);
-
-                $columns = $pdoStatement->fetchAll(PDO::FETCH_COLUMN, 0);
+                $columns = $this->databaseConnection->getMetaData()->getTableColumns($this->tableName);
             }
             // create metadata
             $this->tableMetaData = new DefaultTableMetadata($this->tableName, $columns);

tests/DataSet/QueryTableTest.php

@@ -52,6 +52,35 @@ public static function providerTestGetValue()
         ];
     }
 
+    public function testGetEmptyTableMetaData()
+    {
+        $metaData = new DefaultTableMetadata('table1', ['table1_id', 'column1', 'column2', 'column3', 'column4']);
+
+        $conn = new PDO('sqlite::memory:');
+        $conn->exec(
+          'CREATE TABLE IF NOT EXISTS table1 (
+            table1_id INTEGER PRIMARY KEY AUTOINCREMENT,
+            column1 VARCHAR(20),
+            column2 INT(10),
+            column3 DECIMAL(6,2),
+            column4 TEXT
+          )'
+        );
+
+        $query = '
+            SELECT *
+            FROM table1
+        ';
+
+        $empty_table = new QueryTable(
+            'table1',
+            $query,
+            new DefaultConnection($conn)
+        );
+
+        $this->assertEquals($metaData, $empty_table->getTableMetaData());
+    }
+
     public function testGetTableMetaData()
     {
         $metaData = new DefaultTableMetadata('table1', ['col1', 'col2', 'col3']);