diff options
Diffstat (limited to 'src/backend/commands/functioncmds.c')
| -rw-r--r-- | src/backend/commands/functioncmds.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/src/backend/commands/functioncmds.c b/src/backend/commands/functioncmds.c index bd977d2b3cb..e10d4fb0151 100644 --- a/src/backend/commands/functioncmds.c +++ b/src/backend/commands/functioncmds.c @@ -1657,6 +1657,23 @@ CreateCast(CreateCastStmt *stmt) ereport(ERROR, (errcode(ERRCODE_INVALID_OBJECT_DEFINITION), errmsg("array data types are not binary-compatible"))); + + /* + * We also disallow creating binary-compatibility casts involving + * domains. Casting from a domain to its base type is already + * allowed, and casting the other way ought to go through domain + * coercion to permit constraint checking. Again, if you're intent on + * having your own semantics for that, create a no-op cast function. + * + * NOTE: if we were to relax this, the above checks for composites + * etc. would have to be modified to look through domains to their + * base types. + */ + if (sourcetyptype == TYPTYPE_DOMAIN || + targettyptype == TYPTYPE_DOMAIN) + ereport(ERROR, + (errcode(ERRCODE_INVALID_OBJECT_DEFINITION), + errmsg("domain data types must not be marked binary-compatible"))); } /* |