CreateQuery test_data (children 3)
 Identifier test_data
 Columns definition (children 1)
  ExpressionList (children 3)
   ColumnDeclaration col1 (children 1)
    DataType Nullable (children 1)
     ExpressionList (children 1)
      DataType String
   ColumnDeclaration col2 (children 1)
    DataType Nullable (children 1)
     ExpressionList (children 1)
      DataType String
   ColumnDeclaration col3 (children 1)
    DataType Nullable (children 1)
     ExpressionList (children 1)
      DataType String
 Storage definition (children 1)
  Function Memory
