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Merge branch '10.1' into 10.2

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This commit is contained in:
Oleksandr Byelkin
2019-05-04 17:04:55 +02:00
parent 4345868382 b85aa20065
commit 8cbb14ef5d
205 changed files with 2788 additions and 657 deletions
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20
sql/sql_statistics.cc
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@ -3299,12 +3299,13 @@ 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;
}
}
@ -4084,6 +4085,14 @@ bool is_stat_table(const char *db, const char *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
@ -4091,10 +4100,9 @@ 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)