postgres.git / summary / log / commit / refs
commit 4d0c3eba1dca2c40fbca734f069cdfc675c54a1b
Author: Fujii Masao <fujii@postgresql.org>
Date: Wed Jul 08 03:45:20 2026 +0000
First released in: 14.24, 15.19, 16.15, 17.11, 18.6
doc: Clarify COPY FROM WHERE expression restrictions
Commit aa606b9316a disallowed generated columns in COPY FROM WHERE
expressions, and commit 21c69dc73f9 disallowed system columns.
However, the COPY reference page still mentions only the restriction
on subqueries.
Update the documentation to also list generated columns and system
columns as unsupported in COPY FROM WHERE expressions.
Backpatch the generated-column documentation change to all supported
versions. Backpatch the system-column documentation change to v19,
where that restriction was introduced.
Author: Fujii Masao <masao.fujii@gmail.com>
Reviewed-by: Ayush Tiwari <ayushtiwari.slg01@gmail.com>
Discussion: https://postgr.es/m/CAHGQGwEgxErc54yVOAVWCsr1O=8pgw4oKRPuEQ9mfhkoYGR_XA@mail.gmail.com
Backpatch-through: 14
doc/src/sgml/ref/copy.sgml | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)
diff --git a/doc/src/sgml/ref/copy.sgml b/doc/src/sgml/ref/copy.sgml
index 1518af8a045..44fc99f7e27 100644
--- a/doc/src/sgml/ref/copy.sgml
+++ b/doc/src/sgml/ref/copy.sgml
@@ -456,10 +456,11 @@ WHERE <replaceable class="parameter">condition</replaceable>
</para>
<para>
- Currently, subqueries are not allowed in <literal>WHERE</literal>
- expressions, and the evaluation does not see any changes made by the
- <command>COPY</command> itself (this matters when the expression
- contains calls to <literal>VOLATILE</literal> functions).
+ Currently, subqueries and generated columns are not allowed in
+ <literal>WHERE</literal> expressions, and the evaluation does not see
+ any changes made by the <command>COPY</command> itself (this matters
+ when the expression contains calls to <literal>VOLATILE</literal>
+ functions).
</para>
</listitem>
[parent: 3017543b1ca9]