diff options
Diffstat (limited to 'src/backend/commands/conversioncmds.c')
| -rw-r--r-- | src/backend/commands/conversioncmds.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/src/backend/commands/conversioncmds.c b/src/backend/commands/conversioncmds.c index 5afe86712fc..cb856e8fee4 100644 --- a/src/backend/commands/conversioncmds.c +++ b/src/backend/commands/conversioncmds.c @@ -73,6 +73,18 @@ CreateConversionCommand(CreateConversionStmt *stmt) to_encoding_name))); /* + * We consider conversions to or from SQL_ASCII to be meaningless. (If + * you wish to change this, note that pg_do_encoding_conversion() and its + * sister functions have hard-wired fast paths for any conversion in which + * the source or target encoding is SQL_ASCII, so that an encoding + * conversion function declared for such a case will never be used.) + */ + if (from_encoding == PG_SQL_ASCII || to_encoding == PG_SQL_ASCII) + ereport(ERROR, + (errcode(ERRCODE_INVALID_OBJECT_DEFINITION), + errmsg("encoding conversion to or from \"SQL_ASCII\" is not supported"))); + + /* * Check the existence of the conversion function. Function name could be * a qualified name. */ |