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[FB4, UDF] Prohibition of "return BY VALUE" for ISC_TIMESTAMP_TZ, ISC_TIME_TZ and so on #7884

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[FB4, UDF] Prohibition of "return BY VALUE" for ISC_TIMESTAMP_TZ, ISC_TIME_TZ and so on #7884

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47 changes: 38 additions & 9 deletions src/dsql/DdlNodes.epp
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Original file line number Diff line number Diff line change
Expand Up @@ -1902,16 +1902,45 @@ bool CreateAlterFunctionNode::executeAlter(thread_db* tdbb, DsqlCompilerScratch*
// CVC: This is case of "returns <type> [by value|reference]".
// Some data types can not be returned as value.

if (returnType->udfMechanism.value == FUN_value &&
(field->dtype == dtype_text || field->dtype == dtype_varying ||
field->dtype == dtype_cstring || field->dtype == dtype_blob ||
field->dtype == dtype_timestamp))
if (returnType->udfMechanism.value == FUN_value)
{
// Return mode by value not allowed for this data type.
status_exception::raise(
Arg::Gds(isc_sqlerr) << Arg::Num(-607) <<
Arg::Gds(isc_dsql_command_err) <<
Arg::Gds(isc_return_mode_err));
switch(field->dtype)
{
case dtype_short:
case dtype_long:
case dtype_int64:
case dtype_real:
case dtype_double:
case dtype_d_float: //deprecated
case dtype_boolean:
case dtype_sql_date:
case dtype_sql_time:
break;
case dtype_text:
case dtype_varying:
case dtype_cstring:
case dtype_blob:
case dtype_timestamp:
case dtype_dec64:
case dtype_dec128:
case dtype_int128: //it is a structure
case dtype_timestamp_tz:
case dtype_sql_time_tz:
{
// Return mode by value not allowed for this data type.
status_exception::raise(
Arg::Gds(isc_sqlerr) << Arg::Num(-607) <<
Arg::Gds(isc_dsql_command_err) <<
Arg::Gds(isc_return_mode_err));
}
default:
{
fb_assert(false); // it is an abnormal situation
status_exception::raise(
Arg::Gds(isc_sqlerr) << Arg::Num(-607) <<
Arg::Gds(isc_random) << Arg::Str("UDF returns an unknown data type"));
}
}
}

// For functions returning a blob, coerce return argument position to
Expand Down