3 ms·
Yes, and this is the biggest non-performance reason that wildcards are bad: because over time, the schema should be able to change, often in ways that render se
by rodgerd 6y ago
Yes, and this is the biggest non-performance reason that wildcards are bad: because over time, the schema should be able to change, often in ways that render select * (and the equally works-only-by-accident code calling it) broken.
This is even more so when joins or views are involved, because the columns returned may change over time; joins particularly. Or, for that matter, migrations; while a CREATE plus ALTER may have resulting in a particular column ordering in 2002-2017, the new DB using the CREATE that rolls up all those changes in 2018 may result in a different column ordering, with subsequent broken code (which will be blamed on the DB by the thoughtless programmer, of course).