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MDEV-26911: Unexpected ER_DUP_KEY, ASAN errors, double free detected in ...

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When loading the histogram, use table->field[N], not table->s->field[N].

When we used the latter we would corrupt the fields's default value. One
of the consequences of that would be that AUTO_INCREMENT fields would
stop working correctly.
This commit is contained in:
Sergei Petrunia
2021-11-02 15:18:50 +03:00
parent ac0194bd0e
commit 106c785e2d
3 changed files with 39 additions and 2 deletions
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13
sql/sql_statistics.cc
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@@ -1232,7 +1232,8 @@ public:
Histogram_base *hist;
if (!(hist= create_histogram(mem_root, hist_type, NULL)))
return NULL;
if (!hist->parse(mem_root, table_field, hist_type,
Field *field= table->field[table_field->field_index];
if (!hist->parse(mem_root, field, hist_type,
val.ptr(), val.length()))
{
table_field->read_stats->histogram= hist;
@@ -3178,6 +3179,14 @@ int read_histograms_for_table(THD *thd, TABLE *table, TABLE_LIST *stat_tables)
if (stats_cb->start_histograms_load())
{
Column_stat column_stat(stat_tables[COLUMN_STAT].table, table);
/*
The process of histogram loading makes use of the field it is for. Mark
all fields as readable/writable in order to allow that.
*/
MY_BITMAP *old_sets[2];
dbug_tmp_use_all_columns(table, old_sets, &table->read_set, &table->write_set);
for (Field **field_ptr= table->s->field; *field_ptr; field_ptr++)
{
Field *table_field= *field_ptr;
@@ -3189,6 +3198,8 @@ int read_histograms_for_table(THD *thd, TABLE *table, TABLE_LIST *stat_tables)
}
}
stats_cb->end_histograms_load();
dbug_tmp_restore_column_maps(&table->read_set, &table->write_set, old_sets);
}
table->histograms_are_read= true;
DBUG_RETURN(0);