Fix tab-completion for COPY and \copy options.

MasahikoSawada · MasahikoSawada · commit 765a4c94ccc8 · 2025-07-09T05:45:31.000-07:00
Commit c273d9d reworked tab-completion of COPY and \copy in psql and added support for completing options within WITH clauses. However, the same COPY options were suggested for both COPY TO and COPY FROM commands, even though some options are only valid for one or the other. This commit separates the COPY options for COPY FROM and COPY TO commands to provide more accurate auto-completion suggestions. Back-patch to v14 where tab-completion for COPY and \copy options within WITH clauses was first supported. Author: Atsushi Torikoshi <torikoshia@oss.nttdata.com> Reviewed-by: Yugo Nagata <nagata@sraoss.co.jp> Discussion: https://postgr.es/m/079e7a2c801f252ae8d522b772790ed7@oss.nttdata.com Backpatch-through: 14
diff --git a/src/bin/psql/tab-complete.in.c b/src/bin/psql/tab-complete.in.c
@@ -1190,6 +1190,19 @@ Alter_procedure_options, "COST", "IMMUTABLE", "LEAKPROOF", "NOT LEAKPROOF", \
 Alter_routine_options, "CALLED ON NULL INPUT", "RETURNS NULL ON NULL INPUT", \
 "STRICT", "SUPPORT"
 
+/* COPY options shared between FROM and TO */
+#define Copy_common_options \
+"DELIMITER", "ENCODING", "ESCAPE", "FORMAT", "HEADER", "NULL", "QUOTE"
+
+/* COPY FROM options */
+#define Copy_from_options \
+Copy_common_options, "DEFAULT", "FORCE_NOT_NULL", "FORCE_NULL", "FREEZE", \
+"LOG_VERBOSITY", "ON_ERROR", "REJECT_LIMIT"
+
+/* COPY TO options */
+#define Copy_to_options \
+Copy_common_options, "FORCE_QUOTE"
+
 /*
  * These object types were introduced later than our support cutoff of
  * server version 9.2.  We use the VersionedQuery infrastructure so that
@@ -3284,23 +3297,24 @@ match_previous_words(int pattern_id,
 	else if (Matches("COPY|\\copy", MatchAny, "FROM", MatchAny))
 		COMPLETE_WITH("WITH (", "WHERE");
 
-	/* Complete COPY <sth> FROM|TO filename WITH ( */
-	else if (Matches("COPY|\\copy", MatchAny, "FROM|TO", MatchAny, "WITH", "("))
-		COMPLETE_WITH("FORMAT", "FREEZE", "DELIMITER", "NULL",
-					  "HEADER", "QUOTE", "ESCAPE", "FORCE_QUOTE",
-					  "FORCE_NOT_NULL", "FORCE_NULL", "ENCODING", "DEFAULT",
-					  "ON_ERROR", "LOG_VERBOSITY", "REJECT_LIMIT");
+	/* Complete COPY <sth> FROM filename WITH ( */
+	else if (Matches("COPY|\\copy", MatchAny, "FROM", MatchAny, "WITH", "("))
+		COMPLETE_WITH(Copy_from_options);
+
+	/* Complete COPY <sth> TO filename WITH ( */
+	else if (Matches("COPY|\\copy", MatchAny, "TO", MatchAny, "WITH", "("))
+		COMPLETE_WITH(Copy_to_options);
 
 	/* Complete COPY <sth> FROM|TO filename WITH (FORMAT */
 	else if (Matches("COPY|\\copy", MatchAny, "FROM|TO", MatchAny, "WITH", "(", "FORMAT"))
 		COMPLETE_WITH("binary", "csv", "text");
 
 	/* Complete COPY <sth> FROM filename WITH (ON_ERROR */
-	else if (Matches("COPY|\\copy", MatchAny, "FROM|TO", MatchAny, "WITH", "(", "ON_ERROR"))
+	else if (Matches("COPY|\\copy", MatchAny, "FROM", MatchAny, "WITH", "(", "ON_ERROR"))
 		COMPLETE_WITH("stop", "ignore");
 
 	/* Complete COPY <sth> FROM filename WITH (LOG_VERBOSITY */
-	else if (Matches("COPY|\\copy", MatchAny, "FROM|TO", MatchAny, "WITH", "(", "LOG_VERBOSITY"))
+	else if (Matches("COPY|\\copy", MatchAny, "FROM", MatchAny, "WITH", "(", "LOG_VERBOSITY"))
 		COMPLETE_WITH("silent", "default", "verbose");
 
 	/* Complete COPY <sth> FROM <sth> WITH (<options>) */
