psql: fix \l display for pre-v15 databases.

tglsfdc · tglsfdc · commit 7129a9791eaf · 2022-04-15T18:31:01.000-04:00
With a pre-v15 server, show NULL for the "ICU Locale" column, matching what you see in v15 when the database locale isn't ICU. The previous coding incorrectly repeated datcollate here. (There's an unfinished discussion about whether to consolidate these columns in \l output, but in any case we'd want this fix for \l+ output.) Euler Taveira, per report from Christoph Berg Discussion: https://postgr.es/m/YlmIFCqu+TZSW4rB@msg.df7cb.de
diff --git a/src/bin/psql/describe.c b/src/bin/psql/describe.c
@@ -904,7 +904,7 @@ listAllDbs(const char *pattern, bool verbose)
 						  gettext_noop("Locale Provider"));
 	else
 		appendPQExpBuffer(&buf,
-						  "       d.datcollate as \"%s\",\n"
+						  "       NULL as \"%s\",\n"
 						  "       'libc' AS \"%s\",\n",
 						  gettext_noop("ICU Locale"),
 						  gettext_noop("Locale Provider"));
