-
+ref/allfiles.sgml">
%allfiles;
now becoming available in some commercial databases.
It provides SQL92/SQL3 language support,
transaction integrity, and type extensibility.
-
PostgreSQL is a public-domain,
open source descendant
- of this original Berkeley code.
+
PostgreSQL is a public-domain,
+ open source descendant of this original Berkeley code.
-->
+
+
In INSERT queries the targetlist describes the new rows that
should go into the resultrelation. Missing columns of the
resultrelation will be added by the optimizer with a constant
- NULL expression. It are the expressions in the VALUES clause
+ NULL expression. It is the expressions in the VALUES clause
or the ones from the SELECT clause on INSERT ... SELECT.
replace the old ones. Here now the optimizer will add missing
columns by inserting expressions that put the values from the
old rows into the new one. And it will add the special entry
- like for DELETE too. It are the expressions from the
+ like for DELETE too. It is the expressions from the
SET attribute = expression part of the query.