CreateQuery tbl (children 3)
 Identifier tbl
 Columns definition (children 1)
  ExpressionList (children 3)
   ColumnDeclaration id1 (children 1)
    DataType LowCardinality (children 1)
     ExpressionList (children 1)
      DataType String
   ColumnDeclaration id2 (children 1)
    DataType LowCardinality (children 1)
     ExpressionList (children 1)
      DataType String
   ColumnDeclaration v (children 1)
    DataType Int64
 Storage definition (children 2)
  Function MergeTree
  Function tuple (children 1)
   ExpressionList (children 3)
    Identifier id1
    Identifier id2
    Identifier v
