From: Justin Pryzby <pryzbyj@telsasoft.com>
Date: Tue, 30 Apr 2019 19:05:53 -0500
Subject: [PATCH v2 2/2] print table associated with given TOAST table

---
 src/bin/psql/describe.c | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/src/bin/psql/describe.c b/src/bin/psql/describe.c
index d26d986..ebdf18a 100644
--- a/src/bin/psql/describe.c
+++ b/src/bin/psql/describe.c
@@ -2152,6 +2152,28 @@ describeOneTableDetails(const char *schemaname,
 		}
 	}
 
+	/* print table associated with given TOAST table */
+	if (tableinfo.relkind == RELKIND_TOASTVALUE)
+	{
+		PGresult   *result = NULL;
+		printfPQExpBuffer(&buf,
+						  "SELECT relnamespace::pg_catalog.regnamespace, relname FROM pg_class WHERE reltoastrelid = '%s'",
+						  oid);
+		result = PSQLexec(buf.data);
+		if (!result) {
+			goto error_return;
+		} else if (1 != PQntuples(result)) {
+			PQclear(result);
+			goto error_return;
+		} else {
+			char	   *schemaname = PQgetvalue(result, 0, 0);
+			char	   *relname = PQgetvalue(result, 0, 1);
+			appendPQExpBuffer(&tmpbuf, _("For table: \"%s.%s\""),
+						  schemaname, relname);
+			printTableAddFooter(&cont, tmpbuf.data);
+		}
+	}
+
 	if (tableinfo.relkind == RELKIND_PARTITIONED_TABLE)
 	{
 		/* Get the partition key information  */
-- 
2.7.4


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