database/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2025-07-30 16:24:05 +03:00
Code Activity

Merge 10.10 into 10.11

Browse Source
This commit is contained in:
Marko Mäkelä
2023-10-17 16:04:21 +03:00
parent 17810b7585 a49ebf71af
commit 2ecc0443ec
448 changed files with 13663 additions and 28195 deletions
Download Patch File Download Diff File Expand all files Collapse all files

84
sql/sql_statistics.h
View File

@ -121,20 +121,25 @@ bool check_eits_preferred(THD *thd)
}
int read_statistics_for_tables_if_needed(THD *thd, TABLE_LIST *tables);
int read_statistics_for_tables(THD *thd, TABLE_LIST *tables);
int read_statistics_for_tables(THD *thd, TABLE_LIST *tables,
bool force_reload);
int collect_statistics_for_table(THD *thd, TABLE *table);
void delete_stat_values_for_table_share(TABLE_SHARE *table_share);
int alloc_statistics_for_table(THD *thd, TABLE *table);
void free_statistics_for_table(THD *thd, TABLE *table);
int alloc_statistics_for_table(THD *thd, TABLE *table, MY_BITMAP *stat_fields);
void free_statistics_for_table(TABLE *table);
int update_statistics_for_table(THD *thd, TABLE *table);
int delete_statistics_for_table(THD *thd, const LEX_CSTRING *db, const LEX_CSTRING *tab);
int delete_statistics_for_table(THD *thd, const LEX_CSTRING *db,
const LEX_CSTRING *tab);
int delete_statistics_for_column(THD *thd, TABLE *tab, Field *col);
int delete_statistics_for_index(THD *thd, TABLE *tab, KEY *key_info,
bool ext_prefixes_only);
int rename_table_in_stat_tables(THD *thd, const LEX_CSTRING *db, const LEX_CSTRING *tab,
const LEX_CSTRING *new_db, const LEX_CSTRING *new_tab);
int rename_column_in_stat_tables(THD *thd, TABLE *tab, Field *col,
const char *new_name);
int rename_table_in_stat_tables(THD *thd, const LEX_CSTRING *db,
const LEX_CSTRING *tab,
const LEX_CSTRING *new_db,
const LEX_CSTRING *new_tab);
int rename_columns_in_stat_table(THD *thd, TABLE *tab,
List<Alter_info::RENAME_COLUMN_STAT_PARAMS> *fields);
int rename_indexes_in_stat_table(THD *thd, TABLE *tab,
List<Alter_info::RENAME_INDEX_STAT_PARAMS> *indexes);
void set_statistics_for_table(THD *thd, TABLE *table);
double get_column_avg_frequency(Field * field);
@ -151,13 +156,16 @@ class Histogram_builder;
/*
Common base for all histograms
*/
class Histogram_base
class Histogram_base :public Sql_alloc
{
public:
Histogram_base() {}
virtual ~Histogram_base()= default;
virtual bool parse(MEM_ROOT *mem_root,
const char *db_name, const char *table_name,
Field *field, Histogram_type type_arg,
const char *hist_data, size_t hist_data_len)= 0;
Field *field, const char *hist_data,
size_t hist_data_len)= 0;
virtual void serialize(Field *to_field)= 0;
virtual Histogram_type get_type()=0;
@ -191,7 +199,6 @@ public:
double avg_sel)=0;
virtual double range_selectivity(Field *field, key_range *min_endp,
key_range *max_endp, double avg_sel)=0;
/*
Legacy: return the size of the histogram on disk.
@ -200,19 +207,6 @@ public:
LENGTH(mysql.column_stats.histogram) directly.
*/
virtual uint get_size()=0;
virtual ~Histogram_base()= default;
Histogram_base() : owner(NULL) {}
/*
Memory management: a histogram may be (exclusively) "owned" by a particular
thread (done for histograms that are being collected). By default, a
histogram has owner==NULL and is not owned by any particular thread.
*/
THD *get_owner() { return owner; }
void set_owner(THD *thd) { owner=thd; }
private:
THD *owner;
};
@ -220,11 +214,11 @@ private:
A Height-balanced histogram that stores numeric fractions
*/
class Histogram_binary : public Histogram_base
class Histogram_binary final : public Histogram_base
{
private:
Histogram_type type;
uint8 size; /* Size of values array, in bytes */
size_t size; /* Size of values array, in bytes */
uchar *values;
uint prec_factor()
@ -241,13 +235,16 @@ private:
}
public:
Histogram_binary(Histogram_type type_arg) : type(type_arg)
{}
uint get_width() override
{
switch (type) {
case SINGLE_PREC_HB:
return size;
return (uint) size;
case DOUBLE_PREC_HB:
return size / 2;
return (uint) (size / 2);
default:
DBUG_ASSERT(0);
}
@ -271,7 +268,7 @@ private:
/* Find the bucket which value 'pos' falls into. */
uint find_bucket(double pos, bool first)
{
uint val= (uint) (pos * prec_factor());
size_t val= (size_t) (pos * prec_factor());
int lp= 0;
int rp= get_width() - 1;
int d= get_width() / 2;
@ -313,8 +310,7 @@ public:
Histogram_type get_type() override { return type; }
bool parse(MEM_ROOT *mem_root, const char*, const char*, Field*,
Histogram_type type_arg, const char *hist_data,
size_t hist_data_len) override;
const char *hist_data, size_t hist_data_len) override;
void serialize(Field *to_field) override;
void init_for_collection(MEM_ROOT *mem_root, Histogram_type htype_arg,
ulonglong size) override;
@ -408,7 +404,7 @@ public:
Do not create directly, call Histogram->get_builder(...);
*/
class Histogram_builder
class Histogram_builder: public Sql_alloc
{
protected:
Field *column; /* table field for which the histogram is built */
@ -429,16 +425,16 @@ public:
};
class Columns_statistics;
class Column_statistics;
class Index_statistics;
/* Statistical data on a table */
class Table_statistics
{
public:
my_bool cardinality_is_null; /* TRUE if the cardinality is unknown */
uint columns; /* Number of columns in table */
ha_rows cardinality; /* Number of rows in the table */
uchar *min_max_record_buffers; /* Record buffers for min/max values */
Column_statistics *column_stats; /* Array of statistical data for columns */
@ -446,6 +442,7 @@ public:
/* Array of records per key for index prefixes */
ulonglong *idx_avg_frequency;
uchar *histograms; /* Sequence of histograms */
};
@ -458,7 +455,7 @@ public:
objects are allocated in alloc_statistics_for_table[_share].
*/
class Column_statistics
class Column_statistics :public Sql_alloc
{
private:
@ -467,6 +464,10 @@ private:
static const uint Scale_factor_avg_frequency= 100000;
public:
~Column_statistics()
{
delete histogram;
}
/*
Bitmap indicating what statistical characteristics
are available for the column
@ -507,10 +508,8 @@ private:
ulonglong avg_frequency;
public:
/* Histogram type as specified in mysql.column_stats.hist_type */
Histogram_type histogram_type_on_disk;
Histogram_base *histogram;
bool histogram_exists;
uint32 no_values_provided_bitmap()
{
@ -529,6 +528,11 @@ public:
column_stat_nulls&= ~(1 << stat_field_no);
}
void set_null(uint stat_field_no)
{
column_stat_nulls|= (1 << stat_field_no);
}
bool is_null(uint stat_field_no)
{
return MY_TEST(column_stat_nulls & (1 << stat_field_no));