The only difference is that varchar can have a length limit, text is always unlimited length. There's no significant performance difference between either. For most intents and purposes, they're equal.
Forgive me for diversion, but out of curiosity, would it make some difference whether strings of known length are compared or strings of unknown length are compared, like in join condition "using(address)"?
Or, is the actual length stored in a separate field and read first so strings of different lengths wouldn't even need to be matched?
Is there some reference on this subject other than the source code? Thanks. Ben K. Developer http://benix.tamu.edu ---------------------------(end of broadcast)--------------------------- TIP 5: don't forget to increase your free space map settings
