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| -rw-r--r-- | doc/src/sgml/release-12.sgml | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/doc/src/sgml/release-12.sgml b/doc/src/sgml/release-12.sgml index 68949b20266..dfa3851913c 100644 --- a/doc/src/sgml/release-12.sgml +++ b/doc/src/sgml/release-12.sgml @@ -1590,6 +1590,16 @@ Author: Peter Eisentraut <peter_e@gmx.net> linkend="catalog-pg-constraint"><structname>pg_constraint</structname></link>.<structfield>consrc</structfield> column (Peter Eisentraut) </para> + + <para> + This column has been deprecated for a long time, because it did not + update in response to other catalog changes (such as column renamings). + The recommended way to get a text version of a check constraint's + expression from <structname>pg_constraint</structname> + is <literal>pg_get_expr(conbin, conrelid)</literal>. + <function>pg_get_constraintdef()</function> is also a useful + alternative. + </para> </listitem> <listitem> @@ -1603,6 +1613,14 @@ Author: Peter Eisentraut <peter_e@gmx.net> linkend="catalog-pg-attrdef"><structname>pg_attrdef</structname></link>.<structfield>adsrc</structfield> column (Peter Eisentraut) </para> + + <para> + This column has been deprecated for a long time, because it did not + update in response to other catalog changes (such as column renamings). + The recommended way to get a text version of a default-value expression + from <structname>pg_attrdef</structname> is <literal>pg_get_expr(adbin, + adrelid)</literal>. + </para> </listitem> <listitem> |