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MDEV-17734: AddressSanitizer: use-after-poison in create_key_parts_for_pseudo_indexes

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In this case we were trying to access memory for key_parts which we did not
assign for a fields because it did not any EITS statistics.
The check if EITS statistics for a column is avaialable or not was missing.
This commit is contained in:
Varun Gupta 2018-11-20 20:12:29 +05:30
parent a84d87fde8
commit 14f6b0cdfd
1 changed files with 3 additions and 1 deletions
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4
sql/opt_range.cc
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@ -3350,7 +3350,9 @@ bool create_key_parts_for_pseudo_indexes(RANGE_OPT_PARAM *param,
if (bitmap_is_set(used_fields, (*field_ptr)->field_index))
{
Field *field= *field_ptr;
if (field->type() == MYSQL_TYPE_GEOMETRY)
Column_statistics* col_stats= field->read_stats;
if (field->type() == MYSQL_TYPE_GEOMETRY ||
!col_stats || col_stats->no_stat_values_provided())
continue;
uint16 store_length;