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docs: adjust simpler language for NULL return from ANY/ALL

Adjustment to commit 8610c973dd.

Reported-by: Tom Lane

Discussion: https://postgr.es/m/17406.1541168421@sss.pgh.pa.us

Backpatch-through: 9.3
This commit is contained in:
Bruce Momjian
2018-11-02 13:05:30 -04:00
parent 75f1abfa15
commit d403ed2acd

View File

@ -14124,7 +14124,7 @@ WHERE EXISTS (SELECT 1 FROM tab2 WHERE col2 = tab1.col2);
subquery row (including the case where the subquery returns no subquery row (including the case where the subquery returns no
rows). rows).
The result is NULL if no comparison with a subquery row returns true, The result is NULL if no comparison with a subquery row returns true,
and it returns NULL for at least one row. and at least one comparison returns NULL.
</para> </para>
<para> <para>
@ -14150,7 +14150,7 @@ WHERE EXISTS (SELECT 1 FROM tab2 WHERE col2 = tab1.col2);
(including the case where the subquery returns no rows). (including the case where the subquery returns no rows).
The result is <quote>false</> if any false result is found. The result is <quote>false</> if any false result is found.
The result is NULL if no comparison with a subquery row returns false, The result is NULL if no comparison with a subquery row returns false,
and it returns NULL for at least one row. and at least one comparison returns NULL.
</para> </para>
<para> <para>
@ -14180,7 +14180,7 @@ WHERE EXISTS (SELECT 1 FROM tab2 WHERE col2 = tab1.col2);
The result is <quote>false</> if the comparison returns false for any The result is <quote>false</> if the comparison returns false for any
subquery row. subquery row.
The result is NULL if no comparison with a subquery row returns false, The result is NULL if no comparison with a subquery row returns false,
and it returns NULL for at least one row. and at least one comparison returns NULL.
</para> </para>
<para> <para>