Add regression test for TRY_CAST

src/test/regress/expected/try_cast.out

@@ -0,0 +1,47 @@
+create schema trycast;
+set search_path = trycast;
+
+-- no way to cast
+select try_cast(12 as date);
+ date 
+------
+
+(1 row)
+
+-- typecast via I/O
+select try_cast('11/11/20111' as int);
+ int4 
+------
+
+(1 row)
+select try_cast('111d' as int);
+ int4 
+------
+
+(1 row)
+
+-- typecast from pg_proc
+select try_cast('112344466343'::int8 as int4);
+ int4 
+------
+
+(1 row)
+
+-- arrays
+select try_cast('{1, 2, 31111111111}'::int8[] as int4[]); -- pg_proc
+ int4 
+------
+ {1,2,NULL}
+(1 row)
+select try_cast('{1, 2, lol}'::text[] as int4[]); -- via I/O
+ int4 
+------
+ {1,2,NULL}
+(1 row)
+select try_cast('{1, 2, 31111111111}' as int4[]); -- 
+ int4 
+------
+ {1,2,NULL}
+(1 row)
+
+reset search_path;

src/test/regress/sql/try_cast.sql

@@ -0,0 +1,19 @@
+create schema trycast;
+set search_path = trycast;
+
+-- no way to cast
+select try_cast(12 as date);
+
+-- typecast via I/O
+select try_cast('11/11/20111' as int);
+select try_cast('111d' as int);
+
+-- typecast from pg_proc
+select try_cast('112344466343'::int8 as int4);
+
+-- arrays
+select try_cast('{1, 2, 31111111111}'::int8[] as int4[]); -- pg_proc
+select try_cast('{1, 2, lol}'::text[] as int4[]); -- via I/O
+select try_cast('{1, 2, 31111111111}' as int4[]); -- 
+
+reset search_path;