CreateQuery tlc (children 3)
 Identifier tlc
 Columns definition (children 1)
  ExpressionList (children 1)
   ColumnDeclaration lc (children 1)
    DataType LowCardinality (children 1)
     ExpressionList (children 1)
      DataType Nullable (children 1)
       ExpressionList (children 1)
        DataType String
 Storage definition (children 2)
  Function MergeTree
  Function tuple (children 1)
   ExpressionList
