From 6f81a1f6688c2901d82c02158e9c865f5538246d Mon Sep 17 00:00:00 2001
From: Magnus Hagander <magnus@hagander.net>
Date: Sat, 5 Nov 2011 12:54:58 +0100
Subject: [PATCH] Make psql \d on a sequence show the table/column owning it
---
src/bin/psql/describe.c | 37 +++++++++++++++++++++++++++++++++++++
1 file changed, 37 insertions(+)
diff --git a/src/bin/psql/describe.c b/src/bin/psql/describe.c
index 43c9ce4297b..8ec240d09eb 100644
--- a/src/bin/psql/describe.c
+++ b/src/bin/psql/describe.c
@@ -1609,6 +1609,43 @@ describeOneTableDetails(const char *schemaname,
PQclear(result);
}
}
+ else if (tableinfo.relkind == 'S')
+ {
+ /* Footer information about a sequence */
+ PGresult *result = NULL;
+
+ /* Get the column that owns this sequence */
+ printfPQExpBuffer(&buf, "SELECT pg_catalog.quote_ident(nspname) || '.' ||"
+ "\n pg_catalog.quote_ident(relname) || '.' ||"
+ "\n pg_catalog.quote_ident(attname)"
+ "\nFROM pg_catalog.pg_class c"
+ "\nINNER JOIN pg_catalog.pg_depend d ON c.oid=d.refobjid"
+ "\nINNER JOIN pg_catalog.pg_namespace n ON n.oid=c.relnamespace"
+ "\nINNER JOIN pg_catalog.pg_attribute a ON ("
+ "\n a.attrelid=c.oid AND"
+ "\n a.attnum=d.refobjsubid)"
+ "\nWHERE d.classid='pg_catalog.pg_class'::pg_catalog.regclass"
+ "\n AND d.refclassid='pg_catalog.pg_class'::pg_catalog.regclass"
+ "\n AND d.objid=%s"
+ "\n AND d.deptype='a'",
+ oid);
+
+ result = PSQLexec(buf.data, false);
+ if (!result)
+ goto error_return;
+ else if (PQntuples(result) == 1)
+ {
+ printfPQExpBuffer(&buf, _("Owned by: %s"),
+ PQgetvalue(result, 0, 0));
+ printTableAddFooter(&cont, buf.data);
+ }
+ /*
+ * If we get no rows back, don't show anything (obviously).
+ * We should never get more than one row back, but if we do,
+ * just ignore it and don't print anything.
+ */
+ PQclear(result);
+ }
else if (tableinfo.relkind == 'r' || tableinfo.relkind == 'f')
{
/* Footer information about a table */
--
GitLab