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Commit b5acaa8b authored by Bruce Momjian's avatar Bruce Momjian
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doc: use simpler language for NULL return from ANY/ALL


Previously the combination of "does not return" and "any row" caused
ambiguity.

Reported-by: default avatarKES <kes-kes@yandex.ru>

Discussion: https://postgr.es/m/153701242703.22334.1476830122267077397@wrigleys.postgresql.org

Reviewed-by: David G. Johnston

Backpatch-through: 9.3
parent 877b0056
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......@@ -15049,7 +15049,7 @@ WHERE EXISTS (SELECT 1 FROM tab2 WHERE col2 = tab1.col2);
The result is <quote>false</> if the comparison returns false for every
subquery row (including the case where the subquery returns no
rows).
The result is NULL if the comparison does not return true for any row,
The result is NULL if no comparison with a subquery row returns true,
and it returns NULL for at least one row.
</para>
 
......@@ -15075,7 +15075,7 @@ WHERE EXISTS (SELECT 1 FROM tab2 WHERE col2 = tab1.col2);
The result of <token>ALL</token> is <quote>true</> if all rows yield true
(including the case where the subquery returns no rows).
The result is <quote>false</> if any false result is found.
The result is NULL if the comparison does not return false for any row,
The result is NULL if no comparison with a subquery row returns false,
and it returns NULL for at least one row.
</para>
 
......@@ -15105,8 +15105,8 @@ WHERE EXISTS (SELECT 1 FROM tab2 WHERE col2 = tab1.col2);
case where the subquery returns no rows).
The result is <quote>false</> if the comparison returns false for any
subquery row.
The result is NULL if the comparison does not return false for any
subquery row, and it returns NULL for at least one row.
The result is NULL if no comparison with a subquery row returns false,
and it returns NULL for at least one row.
</para>
 
<para>
......
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