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Re: cd41d376d41: MDEV-16697: Fix difference between 32bit/windows and 64bit systems in allowed select nest level
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On Nov 06, Oleksandr Byelkin wrote:
> Am 06.11.18 um 20:47 schrieb Sergei Golubchik:
> > Hi, Oleksandr!
> > Why did you do that?
> > You wrote "Fix difference between 32bit/windows and 64bit systems", but
> > to fix just that it would've been enough to change nesting_map to
> > ulonglong.
> > Using Bitmap<> you're basically preparing for any arbitrary >64
> > nesting depth. Is this your goal? What feature do you need it for?
> My thoughts was like this:
> 1) we need the same length
> 2) bitmap64 as efficient as ulonglong
> 3) why not use something more flexible
> > On Nov 06, Oleksandr Byelkin wrote:
> >> revision-id: cd41d376d413d066f3d497a67d039515fd385a1c (versioning-1.0.5-36-gcd41d376d41)
> >> parent(s): 1748a31ae8d69e4939336f644f884e9de3039e7f
> >> author: Oleksandr Byelkin <sanja@xxxxxxxxxxx>
> >> committer: Oleksandr Byelkin <sanja@xxxxxxxxxxx>
> >> timestamp: 2018-07-05 17:49:44 +0200
> >> message:
> >> MDEV-16697: Fix difference between 32bit/windows and 64bit systems in allowed select nest level
> >> diff --git a/include/my_global.h b/include/my_global.h
> >> index 11d17ad146a..26078114464 100644
> >> --- a/include/my_global.h
> >> +++ b/include/my_global.h
> >> @@ -984,7 +984,6 @@ typedef unsigned long my_off_t;
> >> TODO Convert these to use Bitmap class.
> >> */
> >> typedef ulonglong table_map; /* Used for table bits in join */
> >> -typedef ulong nesting_map; /* Used for flags of nesting constructs */
> >> /* often used type names - opaque declarations */
> >> typedef const struct charset_info_st CHARSET_INFO;
> >> diff --git a/sql/sql_lex.h b/sql/sql_lex.h
> >> --- a/sql/sql_lex.h
> >> +++ b/sql/sql_lex.h
> >> @@ -33,6 +33,10 @@
> >> #include "sql_tvc.h"
> >> #include "item.h"
> >> +/* Used for flags of nesting constructs */
> >> +#define SELECT_NESTING_MAP_SIZE 64
> >> +typedef Bitmap<SELECT_NESTING_MAP_SIZE> nesting_map;
> >> +
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