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MDEV-7674: ANALYZE shows r_rows=0

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Change r_rows to be double
This commit is contained in:
Sergei Petrunia
2015-03-07 19:30:19 +03:00
parent 143f5d9172
commit 66ad265f3b
8 changed files with 142 additions and 66 deletions
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50
mysql-test/r/analyze_format_json.result
View File

@ -24,7 +24,7 @@ insert into t1 select A.a*10 + B.a, A.a*10 + B.a, A.a*10 + B.a from t0 A, t0 B;
analyze
select * from t0, t1 where t1.a=t0.a and t0.a > 9;
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 SIMPLE t0 ALL NULL NULL NULL NULL 10 10 100.00 0.00 Using where
1 SIMPLE t0 ALL NULL NULL NULL NULL 10 10.00 100.00 0.00 Using where
1 SIMPLE t1 ref a a 5 test.t0.a 1 NULL 100.00 NULL
analyze format=json
select * from t0, t1 where t1.a=t0.a and t0.a > 9;
@ -61,8 +61,8 @@ EXPLAIN
analyze
select * from t0, t1 where t1.a=t0.a and t1.b<4;
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 SIMPLE t0 ALL NULL NULL NULL NULL 10 10 100.00 100.00 Using where
1 SIMPLE t1 ref a a 5 test.t0.a 1 1 100.00 40.00 Using where
1 SIMPLE t0 ALL NULL NULL NULL NULL 10 10.00 100.00 100.00 Using where
1 SIMPLE t1 ref a a 5 test.t0.a 1 1.00 100.00 40.00 Using where
analyze format=json
select * from t0, t1 where t1.a=t0.a and t1.b<4;
EXPLAIN
@ -99,8 +99,8 @@ EXPLAIN
analyze
select * from t1 tbl1, t1 tbl2 where tbl1.b<2 and tbl2.b>5;
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 SIMPLE tbl1 ALL NULL NULL NULL NULL 100 100 100.00 2.00 Using where
1 SIMPLE tbl2 ALL NULL NULL NULL NULL 100 100 100.00 94.00 Using where; Using join buffer (flat, BNL join)
1 SIMPLE tbl1 ALL NULL NULL NULL NULL 100 100.00 100.00 2.00 Using where
1 SIMPLE tbl2 ALL NULL NULL NULL NULL 100 100.00 100.00 94.00 Using where; Using join buffer (flat, BNL join)
analyze format=json
select * from t1 tbl1, t1 tbl2 where tbl1.b<20 and tbl2.b<60;
EXPLAIN
@ -170,3 +170,43 @@ EXPLAIN
}
drop table t1;
drop table t0;
#
# MDEV-7674: ANALYZE shows r_rows=0
#
create table t1(a int);
insert into t1 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t2 (a int, key(a));
insert into t2 values (0),(1);
analyze format=json select * from t1 straight_join t2 force index(a) where t2.a=t1.a;
EXPLAIN
{
"query_block": {
"select_id": 1,
"table": {
"table_name": "t1",
"access_type": "ALL",
"r_loops": 1,
"rows": 10,
"r_rows": 10,
"filtered": 100,
"r_filtered": 100,
"attached_condition": "(t1.a is not null)"
},
"table": {
"table_name": "t2",
"access_type": "ref",
"possible_keys": ["a"],
"key": "a",
"key_length": "5",
"used_key_parts": ["a"],
"ref": ["test.t1.a"],
"r_loops": 10,
"rows": 2,
"r_rows": 0.2,
"filtered": 100,
"r_filtered": 100,
"using_index": true
}
}
}
drop table t1,t2;

92
mysql-test/r/analyze_stmt.result
View File

@ -6,17 +6,17 @@ INSERT INTO t1 select * from t0;
# Try a few basic selects to see that r_rows and r_filtered columns work
analyze select * from t1;
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 10 10 100.00 100.00
1 SIMPLE t1 ALL NULL NULL NULL NULL 10 10.00 100.00 100.00
analyze select * from t1 where a<5;
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 10 10 100.00 50.00 Using where
1 SIMPLE t1 ALL NULL NULL NULL NULL 10 10.00 100.00 50.00 Using where
analyze select * from t1 where a>100;
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 10 10 100.00 0.00 Using where
1 SIMPLE t1 ALL NULL NULL NULL NULL 10 10.00 100.00 0.00 Using where
# ANALYZE DELETE will delete rows:
analyze delete from t1 where a in (2,3,4);
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 10 10 100.00 30.00 Using where
1 SIMPLE t1 ALL NULL NULL NULL NULL 10 10.00 100.00 30.00 Using where
select * from t1;
a
0
@ -32,7 +32,7 @@ create table t1(a int, b int);
insert into t1 select a,a from t0;
analyze update t1 set b=100+b where a in (6,7,8);
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 10 10 100.00 30.00 Using where
1 SIMPLE t1 ALL NULL NULL NULL NULL 10 10.00 100.00 30.00 Using where
select * from t1;
a b
0 0
@ -51,14 +51,14 @@ create table t1(a int, b int);
insert into t1 select a,a from t0;
analyze (select * from t1 A where a<5) union (select * from t1 B where a in (5,6));
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 PRIMARY A ALL NULL NULL NULL NULL 10 10 100.00 50.00 Using where
2 UNION B ALL NULL NULL NULL NULL 10 10 100.00 20.00 Using where
NULL UNION RESULT <union1,2> ALL NULL NULL NULL NULL NULL 7 NULL NULL
1 PRIMARY A ALL NULL NULL NULL NULL 10 10.00 100.00 50.00 Using where
2 UNION B ALL NULL NULL NULL NULL 10 10.00 100.00 20.00 Using where
NULL UNION RESULT <union1,2> ALL NULL NULL NULL NULL NULL 7.00 NULL NULL
analyze (select * from t1 A where a<5) union (select * from t1 B where a in (1,2));
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 PRIMARY A ALL NULL NULL NULL NULL 10 10 100.00 50.00 Using where
2 UNION B ALL NULL NULL NULL NULL 10 10 100.00 20.00 Using where
NULL UNION RESULT <union1,2> ALL NULL NULL NULL NULL NULL 5 NULL NULL
1 PRIMARY A ALL NULL NULL NULL NULL 10 10.00 100.00 50.00 Using where
2 UNION B ALL NULL NULL NULL NULL 10 10.00 100.00 20.00 Using where
NULL UNION RESULT <union1,2> ALL NULL NULL NULL NULL NULL 5.00 NULL NULL
drop table t1;
drop table t0;
#
@ -72,12 +72,12 @@ insert into t1 values (1,1),(2,2),(3,3);
# See .test file for the right values of r_rows and r_filtered.
analyze select a, a in (select t0.b from t0 where t0.b+1=t1.b+1) from t1;
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 3 100.00 100.00
2 DEPENDENT SUBQUERY t0 ALL NULL NULL NULL NULL 10 3 100.00 33.33 Using where
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 3.00 100.00 100.00
2 DEPENDENT SUBQUERY t0 ALL NULL NULL NULL NULL 10 3.00 100.00 33.33 Using where
# Try a subquery that is never executed
analyze select a, a in (select t0.b from t0 where t0.b+1=t1.b+1) from t1 where t1.a > 5;
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 3 100.00 0.00 Using where
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 3.00 100.00 0.00 Using where
2 DEPENDENT SUBQUERY t0 ALL NULL NULL NULL NULL 10 NULL 100.00 NULL Using where
drop table t0, t1;
#
@ -95,8 +95,8 @@ id select_type table type possible_keys key key_len ref rows Extra
# These should have filtered=50
analyze select * from t0, t1 where t0.a<5 and t1.a<5;
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 SIMPLE t0 ALL NULL NULL NULL NULL 10 10 100.00 50.00 Using where
1 SIMPLE t1 ALL NULL NULL NULL NULL 10 10 100.00 50.00 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t0 ALL NULL NULL NULL NULL 10 10.00 100.00 50.00 Using where
1 SIMPLE t1 ALL NULL NULL NULL NULL 10 10.00 100.00 50.00 Using where; Using join buffer (flat, BNL join)
explain select * from t0, t1 where t0.a<5 and t1.b=t0.b;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t0 ALL NULL NULL NULL NULL 10 Using where
@ -104,8 +104,8 @@ id select_type table type possible_keys key key_len ref rows Extra
# Now, t1 should have filtered=10
analyze select * from t0, t1 where t0.a<5 and t1.b=t0.b;
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 SIMPLE t0 ALL NULL NULL NULL NULL 10 10 100.00 50.00 Using where
1 SIMPLE t1 ALL NULL NULL NULL NULL 10 10 100.00 10.00 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t0 ALL NULL NULL NULL NULL 10 10.00 100.00 50.00 Using where
1 SIMPLE t1 ALL NULL NULL NULL NULL 10 10.00 100.00 10.00 Using where; Using join buffer (flat, BNL join)
explain select * from t0, t1 where t0.a<5 and t1.a<5 and t1.b=t0.b;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t0 ALL NULL NULL NULL NULL 10 Using where
@ -113,8 +113,8 @@ id select_type table type possible_keys key key_len ref rows Extra
# Now, t1 should have filtered=10
analyze select * from t0, t1 where t0.a<5 and t1.a<5 and t1.b=t0.b;
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 SIMPLE t0 ALL NULL NULL NULL NULL 10 10 100.00 50.00 Using where
1 SIMPLE t1 ALL NULL NULL NULL NULL 10 10 100.00 10.00 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t0 ALL NULL NULL NULL NULL 10 10.00 100.00 50.00 Using where
1 SIMPLE t1 ALL NULL NULL NULL NULL 10 10.00 100.00 10.00 Using where; Using join buffer (flat, BNL join)
# TODO: Check what is counted for "range checked for each record".
#
# Test for joins
@ -127,13 +127,13 @@ from t0 A, t0 B, t0 C;
# This always has matches, filtered=100%.
analyze select * from t1,t2 where t2.key1=t1.a;
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 10 10 100.00 100.00 Using where
1 SIMPLE t2 ref key1 key1 5 test.t1.a 1 1 100.00 100.00
1 SIMPLE t1 ALL NULL NULL NULL NULL 10 10.00 100.00 100.00 Using where
1 SIMPLE t2 ref key1 key1 5 test.t1.a 1 1.00 100.00 100.00
# This shows r_rows=0. It is actually 0.5 (should r_rows be changed to double?)
analyze select * from t1,t2 where t2.key2x=t1.a;
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 10 10 100.00 100.00 Using where
1 SIMPLE t2 ref key2x key2x 5 test.t1.a 1 0 100.00 100.00
1 SIMPLE t1 ALL NULL NULL NULL NULL 10 10.00 100.00 100.00 Using where
1 SIMPLE t2 ref key2x key2x 5 test.t1.a 1 0.50 100.00 100.00
select * from t1,t2 where t2.key2x=t1.a;
a b key1 key2x col1
0 0 0 0 0
@ -144,8 +144,8 @@ a b key1 key2x col1
# This has t2.filtered=40% (there are 5 values: {0,1,2,3,4}. two of them have mod=0)
analyze select * from t1,t2 where t2.key2x=t1.a and mod(t2.col1,4)=0;
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 10 10 100.00 100.00 Using where
1 SIMPLE t2 ref key2x key2x 5 test.t1.a 1 0 100.00 40.00 Using where
1 SIMPLE t1 ALL NULL NULL NULL NULL 10 10.00 100.00 100.00 Using where
1 SIMPLE t2 ref key2x key2x 5 test.t1.a 1 0.50 100.00 40.00 Using where
drop table t0,t1,t2;
#
# Check non-merged derived tables
@ -156,8 +156,8 @@ insert into t0 values
update t0 set b=b/3;
analyze select * from (select count(*),max(a),b from t0 group by b) T;
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 10 4 100.00 100.00
2 DERIVED t0 ALL NULL NULL NULL NULL 10 10 100.00 100.00 Using temporary; Using filesort
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 10 4.00 100.00 100.00
2 DERIVED t0 ALL NULL NULL NULL NULL 10 10.00 100.00 100.00 Using temporary; Using filesort
drop table t0;
#
# Check ORDER/GROUP BY
@ -167,7 +167,7 @@ insert into t0 values
(0,0),(1,1),(2,2),(3,3),(4,4),(5,5),(6,6),(7,7),(8,8),(9,9);
analyze select count(*),max(a),b from t0 where a<7 group by b;
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 SIMPLE t0 ALL NULL NULL NULL NULL 10 10 100.00 70.00 Using where; Using temporary; Using filesort
1 SIMPLE t0 ALL NULL NULL NULL NULL 10 10.00 100.00 70.00 Using where; Using temporary; Using filesort
drop table t0;
#
# Check multi-table UPDATE/DELETE.
@ -178,12 +178,12 @@ insert into t0 values (0,0),(2,2),(4,4), (8,8);
insert into t1 values (0,0),(2,2), (6,6);
analyze select * from t0,t1 where t0.a=t1.a;
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 3 100.00 100.00
1 SIMPLE t0 ALL NULL NULL NULL NULL 4 4 100.00 16.67 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 3.00 100.00 100.00
1 SIMPLE t0 ALL NULL NULL NULL NULL 4 4.00 100.00 16.67 Using where; Using join buffer (flat, BNL join)
analyze update t0,t1 set t1.b=5555 where t0.a=t1.a;
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 3 100.00 100.00
1 SIMPLE t0 ALL NULL NULL NULL NULL 4 4 100.00 16.67 Using where
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 3.00 100.00 100.00
1 SIMPLE t0 ALL NULL NULL NULL NULL 4 4.00 100.00 16.67 Using where
select * from t1;
a b
0 5555
@ -191,8 +191,8 @@ a b
6 6
analyze delete t1 from t1, t0 where t0.a=t1.a;
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 3 100.00 100.00
1 SIMPLE t0 ALL NULL NULL NULL NULL 4 4 100.00 16.67 Using where
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 3.00 100.00 100.00
1 SIMPLE t0 ALL NULL NULL NULL NULL 4 4.00 100.00 16.67 Using where
select * from t1;
a b
6 6
@ -240,7 +240,7 @@ create table t1 (i int);
insert into t1 values (1),(2),(3),(4);
analyze update t1 set i=8;
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 4 4 100.00 100.00
1 SIMPLE t1 ALL NULL NULL NULL NULL 4 4.00 100.00 100.00
drop table t1;
#
# Check ANALYZE SELECT INTO
@ -257,7 +257,7 @@ drop table t1;
create table t1 (i int);
analyze delete from t1 returning *;
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 0 0 100.00 100.00
1 SIMPLE t1 ALL NULL NULL NULL NULL 0 0.00 100.00 100.00
drop table t1;
#
# MDEV-6396: ANALYZE INSERT/REPLACE is accepted, but does not produce a plan
@ -283,15 +283,15 @@ create table t1(a int);
insert into t1 values (1),(2);
analyze select a from t1 where a <2 into @var;
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 2 2 100.00 50.00 Using where
1 SIMPLE t1 ALL NULL NULL NULL NULL 2 2.00 100.00 50.00 Using where
analyze select a from t1 into @var;
ERROR 42000: Result consisted of more than one row
analyze insert into t1 select * from t1;
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 2 2 100.00 100.00 Using temporary
1 SIMPLE t1 ALL NULL NULL NULL NULL 2 2.00 100.00 100.00 Using temporary
analyze select * into outfile '../../tmp/data1.tmp' from t1;
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 4 4 100.00 100.00
1 SIMPLE t1 ALL NULL NULL NULL NULL 4 4.00 100.00 100.00
drop table t1;
#
# MDEV-7024: Assertion `! is_set()' failed in
@ -303,3 +303,15 @@ execute stmt;
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL no matching row in const table
drop table t1;
#
# MDEV-7674: ANALYZE shows r_rows=0
#
create table t1(a int);
insert into t1 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t2 (a int, key(a));
insert into t2 values (0),(1);
analyze select * from t1 straight_join t2 force index(a) where t2.a=t1.a;
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 10 10.00 100.00 100.00 Using where
1 SIMPLE t2 ref a a 5 test.t1.a 2 0.20 100.00 100.00 Using index
drop table t1,t2;

2
mysql-test/r/analyze_stmt_slow_query_log.result
View File

@ -10,6 +10,6 @@ drop table t1;
# explain: id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
# explain: 1 INSERT t1 ALL NULL NULL NULL NULL NULL NULL 100.00 100.00 NULL
# explain: id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
# explain: 1 SIMPLE t1 ALL NULL NULL NULL NULL 10 10 100.00 30.00 Using where
# explain: 1 SIMPLE t1 ALL NULL NULL NULL NULL 10 10.00 100.00 30.00 Using where
# explain: id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
# explain: 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL No tables used

15
mysql-test/t/analyze_format_json.test
View File

@ -36,3 +36,18 @@ select * from t1 tbl1, t1 tbl2 where tbl1.b<20 and tbl2.b<60 and tbl1.c > tbl2.c
drop table t1;
drop table t0;
--echo #
--echo # MDEV-7674: ANALYZE shows r_rows=0
--echo #
create table t1(a int);
insert into t1 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t2 (a int, key(a));
insert into t2 values (0),(1);
analyze format=json select * from t1 straight_join t2 force index(a) where t2.a=t1.a;
drop table t1,t2;

15
mysql-test/t/analyze_stmt.test
View File

@ -244,3 +244,18 @@ create table t1(a int);
prepare stmt from "analyze select * from t1";
execute stmt;
drop table t1;
--echo #
--echo # MDEV-7674: ANALYZE shows r_rows=0
--echo #
create table t1(a int);
insert into t1 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t2 (a int, key(a));
insert into t2 values (0),(1);
analyze select * from t1 straight_join t2 force index(a) where t2.a=t1.a;
drop table t1,t2;

3
sql/sql_class.cc
View File

@ -2454,8 +2454,7 @@ void THD::make_explain_field_list(List<Item> &field_list, uint8 explain_flags,
MYSQL_TYPE_LONGLONG));
if (is_analyze)
{
field_list.push_back(item= new Item_return_int("r_rows", 10,
MYSQL_TYPE_LONGLONG));
field_list.push_back(item= new Item_float("r_rows", 0.1234, 10, 4));
item->maybe_null=1;
}

27
sql/sql_explain.cc
View File

@ -298,7 +298,7 @@ int print_explain_row(select_result_sink *result,
const char *key_len,
const char *ref,
ha_rows *rows,
ha_rows *r_rows,
double *r_rows,
double r_filtered,
const char *extra)
{
@ -356,10 +356,7 @@ int print_explain_row(select_result_sink *result,
if (is_analyze)
{
if (r_rows)
{
item_list.push_back(new Item_int(*r_rows,
MY_INT64_NUM_DECIMAL_DIGITS));
}
item_list.push_back(new Item_float(*r_rows, 2));
else
item_list.push_back(item_null);
}
@ -472,9 +469,8 @@ int Explain_union::print_explain(Explain_query *query,
/* `r_rows` */
if (is_analyze)
{
ha_rows avg_rows= fake_select_lex_tracker.get_avg_rows();
item_list.push_back(new Item_int((longlong) (ulonglong) avg_rows,
MY_INT64_NUM_DECIMAL_DIGITS));
double avg_rows= fake_select_lex_tracker.get_avg_rows();
item_list.push_back(new Item_float(avg_rows, 2));
}
/* `filtered` */
@ -1004,9 +1000,8 @@ int Explain_table_access::print_explain(select_result_sink *output, uint8 explai
}
else
{
ha_rows avg_rows= tracker.get_avg_rows();
item_list.push_back(new Item_int((longlong) (ulonglong) avg_rows,
MY_INT64_NUM_DECIMAL_DIGITS));
double avg_rows= tracker.get_avg_rows();
item_list.push_back(new Item_float(avg_rows, 2));
}
}
@ -1289,8 +1284,8 @@ void Explain_table_access::print_explain_json(Explain_query *query,
writer->add_member("r_rows");
if (tracker.has_scans())
{
ha_rows avg_rows= tracker.get_avg_rows();
writer->add_ll(avg_rows);
double avg_rows= tracker.get_avg_rows();
writer->add_double(avg_rows);
}
else
writer->add_null();
@ -1756,7 +1751,7 @@ int Explain_update::print_explain(Explain_query *query,
"Using index condition" is also not possible (which is an unjustified limitation)
*/
double r_filtered= 100 * tracker.get_filtered_after_where();
ha_rows r_rows= tracker.get_avg_rows();
double r_rows= tracker.get_avg_rows();
print_explain_row(output, explain_flags, is_analyze,
1, /* id */
@ -1877,8 +1872,8 @@ void Explain_update::print_explain_json(Explain_query *query,
/* `r_rows` */
if (is_analyze && tracker.has_scans())
{
ha_rows avg_rows= tracker.get_avg_rows();
writer->add_member("r_rows").add_ll(avg_rows);
double avg_rows= tracker.get_avg_rows();
writer->add_member("r_rows").add_double(avg_rows);
}
/* UPDATE/DELETE do not produce `filtered` estimate */

4
sql/sql_explain.h
View File

@ -44,9 +44,9 @@ public:
bool has_scans() { return (r_scans != 0); }
ha_rows get_loops() { return r_scans; }
ha_rows get_avg_rows()
double get_avg_rows()
{
return r_scans ? (ha_rows)rint((double) r_rows / r_scans): 0;
return r_scans ? ((double)r_rows / r_scans): 0;
}
double get_filtered_after_where()