Support longer update counts
----------------------------
Key: CORE-4230
URL: http://tracker.firebirdsql.org/browse/CORE-4230
Project: Firebird Core
Issue Type: Improvement
Components: API / Client Library, Engine
Reporter: Mark Rotteveel
Firebird currently uses unsigned 32 bit integers for the update counts returned
by the isc_info_req_update_count (and related info items). Can this be extends
to unsiged 64 bit integers (which technically is already supported by the code
in jrd/inf.cpp). The current code should be compatible with this change because
it will return numbers that fit inside a signed 32 bit integer as a 4 byte vax
integer, and if the receiving side does not support 8 byte vax integers the
client code (also in for example 2.5) will return 0.
Looking at this I also notice a potential bug in the existing code: the update
counts (defined as ULONG) don't correctly roundtrip for values larger than
MAX_SLONG as those are sent as a vax int64, and a received update count is
usually decoded with gds__vax_integer which will return 0 if the length of the
vax integer is larger than 4 (see print_counts in qli\exe.cpp,
process_record_count in isql\isql.epp)
Major reason (for me) is the introduction of retrieval of large update counts
in the JDBC API with Java 8 / JDBC 4.2 (see
http://download.java.net/jdk8/docs/api/java/sql/Statement.html#getLargeUpdateCount()
).
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