Improve tab-completion for TRUNCATE.

Author: Kota Miyake
Reviewed-by: Muhammad Usama
Discussion: https://postgr.es/m/f5d30053d00dcafda3280c9e267ecb0f@oss.nttdata.com

diff --git a/src/bin/psql/tab-complete.c b/src/bin/psql/tab-complete.c
index d7779925599b7419ac9605266972364585a98db9..9f0208ac495ac8b5b0a2078acf9a1cce2e21ecdc 100644 (file)
--- a/src/bin/psql/tab-complete.c
+++ b/src/bin/psql/tab-complete.c
@@ -3832,7 +3832,20 @@ psql_completion(const char *text, int start, int end)
 
 /* TRUNCATE */
    else if (Matches("TRUNCATE"))
+       COMPLETE_WITH_SCHEMA_QUERY(Query_for_list_of_tables,
+                                  " UNION SELECT 'TABLE'"
+                                  " UNION SELECT 'ONLY'");
+   else if (Matches("TRUNCATE", "TABLE"))
+       COMPLETE_WITH_SCHEMA_QUERY(Query_for_list_of_tables,
+                                  " UNION SELECT 'ONLY'");
+   else if (HeadMatches("TRUNCATE") && TailMatches("ONLY"))
        COMPLETE_WITH_SCHEMA_QUERY(Query_for_list_of_tables, NULL);
+   else if (Matches("TRUNCATE", MatchAny) ||
+            Matches("TRUNCATE", "TABLE|ONLY", MatchAny) ||
+            Matches("TRUNCATE", "TABLE", "ONLY", MatchAny))
+       COMPLETE_WITH("RESTART IDENTITY", "CONTINUE IDENTITY", "CASCADE", "RESTRICT");
+   else if (HeadMatches("TRUNCATE") && TailMatches("IDENTITY"))
+       COMPLETE_WITH("CASCADE", "RESTRICT");
 
 /* UNLISTEN */
    else if (Matches("UNLISTEN"))