List disabled triggers separately in psql's "\d <table>" output.

Previously, disabled triggers were not displayed any differently than
enabled ones, which was quite misleading. Patch from Brendan Jurd.

diff --git a/src/bin/psql/describe.c b/src/bin/psql/describe.c
index 2fa9a75b9ffeba23ebb690441d95b4e735cd6175..6469b6aee4103ab32e794b23fadd39cb8c5efcae 100644 (file)
--- a/src/bin/psql/describe.c
+++ b/src/bin/psql/describe.c
@@ -3,7 +3,7 @@
  *
  * Copyright (c) 2000-2007, PostgreSQL Global Development Group
  *
- * $PostgreSQL: pgsql/src/bin/psql/describe.c,v 1.149 2007/01/05 22:19:49 momjian Exp $
+ * $PostgreSQL: pgsql/src/bin/psql/describe.c,v 1.150 2007/01/20 21:17:30 neilc Exp $
  */
 #include "postgres_fe.h"
 #include "describe.h"
@@ -1054,12 +1054,14 @@ describeOneTableDetails(const char *schemaname,
                   *result3 = NULL,
                   *result4 = NULL,
                   *result5 = NULL,
-                  *result6 = NULL;
+                  *result6 = NULL,
+                  *result7 = NULL;
        int         check_count = 0,
                    index_count = 0,
                    foreignkey_count = 0,
                    rule_count = 0,
                    trigger_count = 0,
+                   disabled_trigger_count = 0,
                    inherits_count = 0;
        int         count_footers = 0;
 
@@ -1125,7 +1127,8 @@ describeOneTableDetails(const char *schemaname,
                     "SELECT t.tgname, pg_catalog.pg_get_triggerdef(t.oid)\n"
                              "FROM pg_catalog.pg_trigger t\n"
                              "WHERE t.tgrelid = '%s' "
-                             "AND (not tgisconstraint "
+                             "AND t.tgenabled "
+                             "AND (NOT t.tgisconstraint "
                              " OR NOT EXISTS"
                              "  (SELECT 1 FROM pg_catalog.pg_depend d "
                              "   JOIN pg_catalog.pg_constraint c ON (d.refclassid = c.tableoid AND d.refobjid = c.oid) "
@@ -1142,6 +1145,31 @@ describeOneTableDetails(const char *schemaname,
            }
            else
                trigger_count = PQntuples(result4);
+
+           /* acquire disabled triggers as a separate list */
+           printfPQExpBuffer(&buf,
+                    "SELECT t.tgname, pg_catalog.pg_get_triggerdef(t.oid)\n"
+                             "FROM pg_catalog.pg_trigger t\n"
+                             "WHERE t.tgrelid = '%s' "
+                             "AND NOT t.tgenabled "
+                             "AND (NOT t.tgisconstraint "
+                             " OR NOT EXISTS"
+                             "  (SELECT 1 FROM pg_catalog.pg_depend d "
+                             "   JOIN pg_catalog.pg_constraint c ON (d.refclassid = c.tableoid AND d.refobjid = c.oid) "
+                             "   WHERE d.classid = t.tableoid AND d.objid = t.oid AND d.deptype = 'i' AND c.contype = 'f'))"
+                             "   ORDER BY 1",
+                             oid);
+           result7 = PSQLexec(buf.data, false);
+           if (!result7)
+           {
+               PQclear(result1);
+               PQclear(result2);
+               PQclear(result3);
+               PQclear(result4);
+               goto error_return;
+           }
+           else
+               disabled_trigger_count = PQntuples(result7);
        }
 
        /* count foreign-key constraints (there are none if no triggers) */
@@ -1160,6 +1188,7 @@ describeOneTableDetails(const char *schemaname,
                PQclear(result2);
                PQclear(result3);
                PQclear(result4);
+               PQclear(result7);
                goto error_return;
            }
            else
@@ -1177,6 +1206,7 @@ describeOneTableDetails(const char *schemaname,
            PQclear(result3);
            PQclear(result4);
            PQclear(result5);
+           PQclear(result7);
            goto error_return;
        }
        else
@@ -1312,6 +1342,28 @@ describeOneTableDetails(const char *schemaname,
            }
        }
 
+       /* print disabled triggers */
+       if (disabled_trigger_count > 0)
+       {
+           printfPQExpBuffer(&buf, _("Disabled triggers:"));
+           footers[count_footers++] = pg_strdup(buf.data);
+           for (i = 0; i < disabled_trigger_count; i++)
+           {
+               const char *tgdef;
+               const char *usingpos;
+
+               /* Everything after "TRIGGER" is echoed verbatim */
+               tgdef = PQgetvalue(result7, i, 1);
+               usingpos = strstr(tgdef, " TRIGGER ");
+               if (usingpos)
+                   tgdef = usingpos + 9;
+
+               printfPQExpBuffer(&buf, "    %s", tgdef);
+
+               footers[count_footers++] = pg_strdup(buf.data);
+           }
+       }
+
        /* print inherits */
        for (i = 0; i < inherits_count; i++)
        {
@@ -1347,6 +1399,7 @@ describeOneTableDetails(const char *schemaname,
        PQclear(result4);
        PQclear(result5);
        PQclear(result6);
+       PQclear(result7);
    }
 
    printTable(title.data, headers,