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Bug #12796: Record lost in HEAP table

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Two handler objects were present, one was used for an insert and the other for a select
The state of the statistics was local to the handler object and thus the other handler
object didn't notice the insert.
Fix included:
1) Add a new variable key_stat_version added to whenever statistics was considered in need
of update (previously key_stats_ok= FALSE in those places)
2) Add a new handler variable key_stat_version assigned whenever key_stats_ok= TRUE was set
previously
3) Fix records_in_range to return records if records <= 1
4) Fix records_in_range to add 2 to rec_per_key to ensure we don't specify 0 or 1 when it isn't
and thus invoking incorrect optimisations.
5) Fix unique key handling for HEAP table in records_in_range
This commit is contained in:
pappa@c-5608e253.1238-1-64736c10.cust.bredbandsbolaget.se 2005-11-08 00:26:37 -05:00
commit 4282ad92cb
7 changed files with 71 additions and 16 deletions
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4
sql/ha_heap.h
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@ -29,10 +29,10 @@ class ha_heap: public handler
key_map btree_keys;
/* number of records changed since last statistics update */
uint records_changed;
bool key_stats_ok;
uint key_stat_version;
public:
ha_heap(TABLE *table): handler(table), file(0), records_changed(0),
key_stats_ok(0) {}
key_stat_version(0) {}
~ha_heap() {}
const char *table_type() const { return "HEAP"; }
const char *index_type(uint inx)