CreateQuery test_tab (children 3)
 Identifier test_tab
 Columns definition (children 1)
  ExpressionList (children 4)
   ColumnDeclaration id (children 1)
    DataType UInt32
   ColumnDeclaration haystack (children 1)
    DataType String
   ColumnDeclaration needle (children 1)
    DataType String
   ColumnDeclaration replacement (children 1)
    DataType String
 Storage definition (children 2)
  Function MergeTree (children 1)
   ExpressionList
  Identifier id
