pg_dump: Add appropriate version check

Some code added by commit 2f094e7ac69 needs to be behind a version
check so that it is not run against older databases.

Author: Andrew Dunstan <andrew@dunslane.net>
Reviewed-by: Junwang Zhao <zhjwpku@gmail.com>
Discussion: https://www.postgresql.org/message-id/afe3f099-3271-4fc4-8e32-467b5309affb%40dunslane.net

diff --git a/src/bin/pg_dump/pg_dump.c b/src/bin/pg_dump/pg_dump.c
index b41a3ae3db4bf882fd30ebce8e4b046790ef9f05..23af95027e6dbdbb7acf9cc522dd2d40d20c2f97 100644 (file)
--- a/src/bin/pg_dump/pg_dump.c
+++ b/src/bin/pg_dump/pg_dump.c
@@ -20473,11 +20473,12 @@ getDependencies(Archive *fout)
         * Translate dependencies of pg_propgraph_element entries into
         * dependencies of their parent pg_class entry.
         */
-       appendPQExpBufferStr(query, "UNION ALL\n"
-                                                "SELECT 'pg_class'::regclass AS classid, pgepgid AS objid, refclassid, refobjid, deptype "
-                                                "FROM pg_depend d, pg_propgraph_element pge "
-                                                "WHERE deptype NOT IN ('p', 'e', 'i') AND "
-                                                "classid = 'pg_propgraph_element'::regclass AND objid = pge.oid\n");
+       if (fout->remoteVersion >= 190000)
+               appendPQExpBufferStr(query, "UNION ALL\n"
+                                                        "SELECT 'pg_class'::regclass AS classid, pgepgid AS objid, refclassid, refobjid, deptype "
+                                                        "FROM pg_depend d, pg_propgraph_element pge "
+                                                        "WHERE deptype NOT IN ('p', 'e', 'i') AND "
+                                                        "classid = 'pg_propgraph_element'::regclass AND objid = pge.oid\n");
 
        /* Sort the output for efficiency below */
        appendPQExpBufferStr(query, "ORDER BY 1,2");