CreateQuery test1 (children 3)
 Identifier test1
 Columns definition (children 1)
  ExpressionList (children 1)
   ColumnDeclaration t (children 1)
    DataType Tuple (children 1)
     ExpressionList (children 1)
      NameTypePair a (children 1)
       DataType Boolean
 Storage definition (children 2)
  Function MergeTree
  Identifier t.a
