CreateQuery tab (children 3)
 Identifier tab
 Columns definition (children 2)
  ExpressionList (children 3)
   ColumnDeclaration key (children 1)
    DataType UInt64
   ColumnDeclaration str1 (children 1)
    DataType String
   ColumnDeclaration str2 (children 1)
    DataType String
  ExpressionList (children 1)
   Index (children 2)
    Function tuple (children 1)
     ExpressionList (children 2)
      Identifier str1
      Identifier str2
    Function text (children 1)
     ExpressionList (children 1)
      Function equals (children 1)
       ExpressionList (children 2)
        Identifier tokenizer
        Literal \'splitByNonAlpha\'
 Storage definition (children 2)
  Function MergeTree
  Identifier key