CreateQuery tab (children 3)
 Identifier tab
 Columns definition (children 2)
  ExpressionList (children 1)
   ColumnDeclaration str (children 1)
    DataType String
  ExpressionList (children 1)
   Index (children 2)
    Identifier str
    Function text (children 1)
     ExpressionList (children 1)
      Function equals (children 1)
       ExpressionList (children 2)
        Identifier tokenizer
        Function ngrams (children 1)
         ExpressionList (children 1)
          Literal \'4\'
 Storage definition (children 2)
  Function MergeTree
  Function tuple (children 1)
   ExpressionList