MDEV-34061 unix_timestamp(coalesce(timestamp_column)) returns NULL on '1970-01-01 00:00:00.000001'
Field_timestampf::val_native() checked only the
first four bytes to detect zero dates.
That was not enough. Fixing the code to check all packed_length()
bytes to detect zero dates.
MDEV-34069 Zero datetime reinterprets as '1970-01-01 00:00:00' on field_datetime=field_timestamp
The code in Field_timestamp::save_in_field() did not catch
zero datetime and stored it to the other field like a usual value
using store_timestamp_dec(), which knows nothing about zero date and
treats {tv_sec=0, tv_usec=0} as a normal timeval value corresponding to
'1970-01-01 00:00:00 +00:00'.
Fixing the code to catch the special combination (ts==0 && sec_pat==0) and
store it using store_time_dec() with a zero datetime passed as an argument.
MDEV-34063 tpool - integer overflow in multiplication.
When calculating next wakeup timepoint for the timer thread, with large
thread_pool_stall_limit values, 32bit int overflow can happen.
Fixed by making one operand 8 byte large.
Also fixed the type of tick_interval to be unsigned, so it does not
go negative for very thread_pool_stall_limit.
This is based on https://github.com/intel/intel-ipsec-mb/
and has been tested both on x86 and x86-64, with code that
was generated by several versions of GCC and clang.
GCC 11 or clang 8 or later should be able to compile this,
and so should recent versions of MSVC.
Thanks to Intel Corporation for providing access to hardware,
for answering my questions regarding the code, and for
providing the coefficients for the CRC-32C computation.
crc32_avx512(): Compute a reverse polynomial CRC-32 using
precomputed tables and carry-less product, for up to 256 bytes
of unaligned input per loop iteration.
MDEV-33817 preparation: Restructuring and unit tests
In our unit test, let us rely on our own reference
implementation using the reflected
CRC-32 ISO 3309 and CRC-32C polynomials. Let us also
test with various lengths.
Let us refactor the CRC-32 and CRC-32C implementations
so that no special compilation flags will be needed and
that some function call indirection will be avoided.
pmull_supported: Remove. We will have pointers to two separate
functions crc32c_aarch64_pmull() and crc32c_aarch64().
MDEV-33538 make auxiliary spider plugins init depend on actual spider
The two I_S plugins SPIDER_ALLOC_MEM and SPIDER_WRAPPER_PROTOCOL
only makes sense if the main SPIDER plugin is installed. Further,
SPIDER_ALLOC_MEM requires a mutex that requires SPIDER init to fill
the table.
We also update the spider init query to override
--transaction_read_only=on so that it does not affect the spider init.
Also fixed error handling in spider_db_init() so that failure in
spider table init does not result in memory leak
