export more functionality for phpize builds

cosmetics. typedef-ed types should be in capital case

improve the stats subsystem. Reduce the number of macro definitions
in half by smartly introducing 2 new macros. Make MYSQLND::stats a pointer
from being aggregated and add triggers.

Change of way the packet objects are created/initialised
If the protocol gets changed, ever, we can decide at runtime
easily which protocol to use by instantiating the right protocol
obje

Change of way the packet objects are created/initialised
If the protocol gets changed, ever, we can decide at runtime
easily which protocol to use by instantiating the right protocol
object. But this is restricted to the structure of the packets, not
the flow.

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Add plugin storage for MYSQLND_STMT too

Remove stub code which never actually was used for anything.
Things like this can be built on top of the core.

Remove the zval caching from mysqlnd. It was disabled versions ago
due to problems on windows, which were not debugged. Better have
code that is disabled not in the core.

Remove disabled code - threaded fetching. This can be implemented
on a upper level and by offloading it we reduce the complexity of
the core.

- void is NaN, you can't do math ops on void. Declarations go first. Fix TS build

Compressed protocol support + extensibility for mysqlnd

Fix: log slow queries in stats regardless of mysqlnd.log_mask setting.

Use mnd_ wrappers wherever possible. Needed for
statistics.

Fix trace output. DBG_RETURN should be used in traced
functions.

Fixing a leak in mysqlnd when passing invalid fetch modes to mysqlnd.

Fix for bug#48745
mysqlnd: mysql_num_fields returns wrong column count for mysql_list_fields

Revert mysqlnd to RC3 state after issues with pconnects

MFH: Fix bug #48644 mysqlnd does not compile with '--enable-mysqlnd-threading'

Temporarily disable this optimization causing too much trouble, kept in HEAD

MFH:
Memory usage optimisation. mysqlnd is not libmysql. mysqlnd does use the
Zend allocator, which means that is easier to hit memory_limit if you
have big stored (buffered) result sets.

MFH:
Memory usage optimisation. mysqlnd is not libmysql. mysqlnd does use the
Zend allocator, which means that is easier to hit memory_limit if you
have big stored (buffered) result sets. Before with libmysql you won't
hit memory_limit because libmysql uses libc's allocator and nothing is
checked. Now, with mysqlnd the situation is stricter and it is easier to
hit memory_limit. We try to optimize for big result sets. If a result set
is larger than 10 rows we will start freeing some data to keep memory usage
after 10 rows constant. This will help in the cases where a buffered result
set is scrolled forward only and just only once, or mysqlnd will need to
decode data from the network buffers again - yes, it is a trade-off between
CPU time and memory size. The best for big result sets is of course using
unbuffered queries - for comparison : 3 Million rows with buffered take
at least 180MB, with buffered you will stay at 3MB, and unbuffered will be
just 7-8% slower.

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MFH:
Hardwire function call instead of using callbacks. We don't actually need
callbacks, it was done for making 2 functions static, not to pollute the
global functions space but that had

MFH:
Hardwire function call instead of using callbacks. We don't actually need
callbacks, it was done for making 2 functions static, not to pollute the
global functions space but that had its price of 8 bytes overheat per
allocation, which is just too much. Also making the app member 32b instead
of 64b, which should save additional 4 byte, to the total of 12 byte per
allocation of a row buffer.

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MFH:Fix a valgrind warning as well as more trace log information

MFH:Fix a problem with cursors, which did not happen with unbuffered PS for
some reason. Double free of the data, which led to valgrind warnigns.
The fix actually optimizes the code in this c

MFH:Fix a problem with cursors, which did not happen with unbuffered PS for
some reason. Double free of the data, which led to valgrind warnigns.
The fix actually optimizes the code in this cases because the old code
used copy_ctor while the new one skips it because it is not needed.
Transferring data ownership and nulling works best, for PS where we
always copy the string from the result set, unlike the text protocol.

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MFH:
Fix a bug with mysqlnd_fetch_field(_direct()). With mysqlnd the optimised
function was called, which however, doesn't respect that during store the
raw data is not unpacked, to be la

MFH:
Fix a bug with mysqlnd_fetch_field(_direct()). With mysqlnd the optimised
function was called, which however, doesn't respect that during store the
raw data is not unpacked, to be lazy. The data is unpacked to zvals later,
during every row fetch. However, this way max_length won't be calculated
correctly. So, if a mysqlnd_fetch_field(_direct) call comes we need to
unpack everything and then calculate max_length...and that is expensive,
defies our lazy unpacking optimisation.

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- MFH: Removed UG(unicode) checks

MFH: Fix the build because the macro name has changed