CreateQuery null_01016 (children 3)
 Identifier null_01016
 Columns definition (children 1)
  ExpressionList (children 1)
   ColumnDeclaration x (children 1)
    DataType Nullable (children 1)
     ExpressionList (children 1)
      DataType String
 Storage definition (children 3)
  Function MergeTree
  Function ifNull (children 1)
   ExpressionList (children 2)
    Identifier x
    Literal \'partition-null\'
  Function ifNull (children 1)
   ExpressionList (children 2)
    Identifier x
    Literal \'order-null\'