CreateQuery tab (children 3)
 Identifier tab
 Columns definition (children 2)
  ExpressionList (children 2)
   ColumnDeclaration k (children 1)
    DataType UInt64
   ColumnDeclaration s (children 1)
    DataType String
  ExpressionList (children 1)
   Index (children 2)
    Identifier s
    Function text (children 1)
     ExpressionList (children 1)
      Function equals (children 1)
       ExpressionList (children 2)
        Identifier tokenizer
        Function ngrams (children 1)
         ExpressionList (children 1)
          Literal UInt64_2
 Storage definition (children 3)
  Function MergeTree (children 1)
   ExpressionList
  Identifier k
  Set