Class SqlCoalesceFunction

  • public class SqlCoalesceFunction
    extends SqlFunction
    The COALESCE function.
    • Constructor Detail

      • SqlCoalesceFunction

        public SqlCoalesceFunction()
    • Method Detail

      • rewriteCall

        public SqlNode rewriteCall​(SqlValidator validator,
                                   SqlCall call)
        Description copied from class: SqlOperator
        Rewrites a call to this operator. Some operators are implemented as trivial rewrites (e.g. NULLIF becomes CASE). However, we don't do this at createCall time because we want to preserve the original SQL syntax as much as possible; instead, we do this before the call is validated (so the trivial operator doesn't need its own implementation of type derivation methods). The default implementation is to just return the original call without any rewrite.
        rewriteCall in class SqlOperator
        validator - Validator
        call - Call to be rewritten
        rewritten call