From 68386fc15b8ba01b5a4c4ed98c4a4d4968817cc9 Mon Sep 17 00:00:00 2001
From: Robert Haas <rhaas@postgresql.org>
Date: Mon, 20 Aug 2012 16:30:08 -0400
Subject: [PATCH] Tab complete "TABLE whatever DROP CONSTRAINT" with a
constraint name.
Jeff Janes
---
src/bin/psql/tab-complete.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/src/bin/psql/tab-complete.c b/src/bin/psql/tab-complete.c
index a1bb230d6be..ef62a422eeb 100644
--- a/src/bin/psql/tab-complete.c
+++ b/src/bin/psql/tab-complete.c
@@ -579,6 +579,14 @@ static const SchemaQuery Query_for_list_of_views = {
" and pg_catalog.quote_ident(c1.relname)='%s'"\
" and pg_catalog.pg_table_is_visible(c2.oid)"
+/* the silly-looking length condition is just to eat up the current word */
+#define Query_for_constraint_of_table \
+"SELECT pg_catalog.quote_ident(conname) "\
+" FROM pg_catalog.pg_class c1, pg_catalog.pg_constraint con "\
+" WHERE c1.oid=conrelid and (%d = pg_catalog.length('%s'))"\
+" and pg_catalog.quote_ident(c1.relname)='%s'"\
+" and pg_catalog.pg_table_is_visible(c1.oid)"
+
/* the silly-looking length condition is just to eat up the current word */
#define Query_for_list_of_tables_for_trigger \
"SELECT pg_catalog.quote_ident(relname) "\
@@ -1337,6 +1345,14 @@ psql_completion(char *text, int start, int end)
pg_strcasecmp(prev2_wd, "DROP") == 0 &&
pg_strcasecmp(prev_wd, "COLUMN") == 0)
COMPLETE_WITH_ATTR(prev3_wd, "");
+ /* If we have TABLE <sth> DROP CONSTRAINT, provide list of constraints */
+ else if (pg_strcasecmp(prev4_wd, "TABLE") == 0 &&
+ pg_strcasecmp(prev2_wd, "DROP") == 0 &&
+ pg_strcasecmp(prev_wd, "CONSTRAINT") == 0)
+ {
+ completion_info_charp = prev3_wd;
+ COMPLETE_WITH_QUERY(Query_for_constraint_of_table);
+ }
/* ALTER TABLE ALTER [COLUMN] <foo> */
else if ((pg_strcasecmp(prev3_wd, "ALTER") == 0 &&
pg_strcasecmp(prev2_wd, "COLUMN") == 0) ||
--
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