Class SqlCoalesceFunction

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

    • SqlCoalesceFunction

      public SqlCoalesceFunction()
  • Method Details

    • 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