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MDEV-18300: ASAN error in Field_blob::get_key_image upon UPDATE with subquery

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For single table updates and multi-table updates , engine independent statistics were not being
read even if the statistics were collected.
Fixed it, so when the optimizer_use_condition_selectivity > 2 then we would read the available
statistics for update queries.
This commit is contained in:
Varun Gupta
2019-04-11 13:05:01 +05:30
parent 812ac2bb85
commit 409dddf695
4 changed files with 57 additions and 0 deletions
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sql/sql_statistics.cc
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@ -4071,6 +4071,7 @@ bool is_eits_usable(Field *field)
partition list of a table. We assume the selecticivity for
such columns would be handled during partition pruning.
*/
DBUG_ASSERT(field->table->stats_is_read);
Column_statistics* col_stats= field->read_stats;
return col_stats && !col_stats->no_stat_values_provided() && //(1)
field->type() != MYSQL_TYPE_GEOMETRY && //(2)