CreateQuery tab (children 3)
 Identifier tab
 Columns definition (children 1)
  ExpressionList (children 4)
   ColumnDeclaration a (children 1)
    DataType Int32
   ColumnDeclaration b (children 1)
    DataType Int32
   ColumnDeclaration c (children 1)
    DataType Int32
   ColumnDeclaration d (children 1)
    DataType Int32
 Storage definition (children 2)
  Function MergeTree
  Function tuple (children 1)
   ExpressionList (children 3)
    Identifier a
    Identifier b
    Identifier c
