SQL INSERT performance omitting field names?

Question

Does anyone knows if removing the field names from an INSERT query results in some performance improvements?

I mean is this:

INSERT INTO table1 VALUES (value1, value2, ...)

faster for DB to be accomplished rather than doing this:

INSERT INTO table1 (field1, field2, ...) VALUES (value1, value2, ...)

?

I know it might be probably a meaningless performance difference, but just to know.

I'm usually using MySQL and PostgreSQL as DBs.

Answer 1

No, actually the contrary! At least for Microsoft SQL Server - you didn't specify what database you're talking about.....

If you don't specify the fields, either in a SELECT or an INSERT, then SQL Server's query processor must first go inspect the system catalogs to find out what fields are indeed available.

So I would always recommend to explicitly list the fields you want - on SELECTs as much as on INSERTs.