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MDEV-16327: Server doesn't account for engines that supports OFFSET on their own.

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Engine get LIMIT/OFFSET info an can it use/reset.
This commit is contained in:
Oleksandr Byelkin
2019-10-11 13:08:53 +02:00
parent a6de640804
commit ebeb4f93e8
6 changed files with 71 additions and 7 deletions
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6
sql/sql_limit.h
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@ -28,6 +28,10 @@ class Select_limit_counters
Select_limit_counters():
select_limit_cnt(0), offset_limit_cnt(0)
{};
Select_limit_counters(Select_limit_counters &orig):
select_limit_cnt(orig.select_limit_cnt),
offset_limit_cnt(orig.offset_limit_cnt)
{};
void set_limit(ha_rows limit, ha_rows offset)
{
@ -48,6 +52,8 @@ class Select_limit_counters
bool is_unlimited()
{ return select_limit_cnt == HA_POS_ERROR; }
bool is_unrestricted()
{ return select_limit_cnt == HA_POS_ERROR && offset_limit_cnt == 0; }
void set_unlimited()
{ select_limit_cnt= HA_POS_ERROR; offset_limit_cnt= 0; }