Fix infinite recursion on EX-types comparison

Author: aafemt

src/jrd/cvt2.cpp

@@ -490,6 +490,17 @@ int CVT2_compare(const dsc* arg1, const dsc* arg2, Firebird::DecimalStatus decSt
 	switch (arg1->dsc_dtype)
 	{
 	case dtype_ex_timestamp_tz:
+		{
+			DSC desc;
+			MOVE_CLEAR(&desc, sizeof(desc));
+			desc.dsc_dtype = dtype_ex_timestamp_tz;
+			ISC_TIMESTAMP_TZ_EX datetime;
+			desc.dsc_length = sizeof(datetime);
+			desc.dsc_address = (UCHAR*) &datetime;
+			CVT_move(arg2, &desc, 0);
+			return CVT2_compare(arg1, &desc, 0);
+		}
+
 	case dtype_timestamp_tz:
 		{
 			DSC desc;
@@ -515,6 +526,17 @@ int CVT2_compare(const dsc* arg1, const dsc* arg2, Firebird::DecimalStatus decSt
 		}
 
 	case dtype_ex_time_tz:
+		{
+			DSC desc;
+			MOVE_CLEAR(&desc, sizeof(desc));
+			desc.dsc_dtype = dtype_ex_time_tz;
+			ISC_TIME_TZ_EX atime;
+			desc.dsc_length = sizeof(atime);
+			desc.dsc_address = (UCHAR*) &atime;
+			CVT_move(arg2, &desc, 0);
+			return CVT2_compare(arg1, &desc, 0);
+		}
+
 	case dtype_sql_time_tz:
 		{
 			DSC desc;