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Fixed bug mdev-3979.

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Made allocation of memory for statistical data in a table share to be thread safe.
This memory is now allocated in a special MEM_ROOT that is created for each
table share.
This commit is contained in:
Igor Babaev
2013-01-08 08:17:51 -08:00
parent e44253a125
commit 01dca17a9c
5 changed files with 237 additions and 180 deletions
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sql/sql_statistics.h
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@ -102,6 +102,7 @@ class Table_statistics
public:
my_bool cardinality_is_null; /* TRUE if the cardinality is unknown */
ha_rows cardinality; /* Number of rows in the table */
uchar *min_max_record_buffers; /* Record buffers for min/max values */
Column_statistics *column_stats; /* Array of statistical data for columns */
Index_statistics *index_stats; /* Array of statistical data for indexes */
ulong *idx_avg_frequency; /* Array of records per key for index prefixes */