CreateQuery text_index_validation (children 3)
 Identifier text_index_validation
 Columns definition (children 2)
  ExpressionList (children 1)
   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 array (children 1)
         ExpressionList (children 1)
          Literal \'a\'
 Storage definition (children 2)
  Function MergeTree
  Function tuple (children 1)
   ExpressionList
