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Merge branch '10.2' into 10.3

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This commit is contained in:
Oleksandr Byelkin
2019-05-12 17:20:23 +02:00
parent a89f199c64 8ce702aa90
commit c51f85f882
255 changed files with 3975 additions and 1186 deletions
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20
sql/sql_statistics.cc
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@ -3293,12 +3293,13 @@ int read_statistics_for_tables_if_needed(THD *thd, TABLE_LIST *tables)
if (table_share->stats_cb.stats_is_read)
tl->table->stats_is_read= TRUE;
if (thd->variables.optimizer_use_condition_selectivity > 3 &&
table_share && !table_share->stats_cb.histograms_are_read)
table_share && table_share->stats_cb.stats_can_be_read &&
!table_share->stats_cb.histograms_are_read)
{
(void) read_histograms_for_table(thd, tl->table, stat_tables);
table_share->stats_cb.histograms_are_read= TRUE;
}
if (table_share->stats_cb.stats_is_read)
if (table_share->stats_cb.histograms_are_read)
tl->table->histograms_are_read= TRUE;
}
}
@ -4077,6 +4078,14 @@ bool is_stat_table(const LEX_CSTRING *db, LEX_CSTRING *table)
bool is_eits_usable(Field *field)
{
Column_statistics* col_stats= field->read_stats;
// check if column_statistics was allocated for this field
if (!col_stats)
return false;
DBUG_ASSERT(field->table->stats_is_read);
/*
(1): checks if we have EITS statistics for a particular column
(2): Don't use EITS for GEOMETRY columns
@ -4084,10 +4093,9 @@ 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)
return !col_stats->no_stat_values_provided() && //(1)
field->type() != MYSQL_TYPE_GEOMETRY && //(2)
#ifdef WITH_PARTITION_STORAGE_ENGINE
(!field->table->part_info ||
!field->table->part_info->field_in_partition_expr(field)) && //(3)