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Changing the state of whether we're recording profiling information
halfway through a query (as happens in "SET SESSION PROFILING = ...") has a few side-effects, the worst of which is a memory leak for prepared statements, which poke directly from the parser into the profiling code (we don't have the query text when we need it) and that overwrites a pointer to heap-allocated memory when the previous statement turns on profiling. Instead, now set a flag when we begin a new statement that tracks whether profiling is on _at the start_ of the query. Use that to track whether we gather info. Additionally, use that AND use the state of the profiling variable after the end of a query to know whether to store information about the query that just finished. mysql-test/r/profiling.result: Testing whether profiling is on at the beginning of a query and at the end of a query makes "SET SESSION PROFILING = ..." statements disappear from the profiling. They were never reliable before. sql/sql_profile.cc: Check to see if profiling was enabled at the beginning of this query before trying to store query_source. This avoids a memory leak for prepared statements, which get here by direct means. If profiling was toggled in this query, then don't store this query profile. sql/sql_profile.h: Keep track of whether profiling is on.
This commit is contained in:
parent
c717287c22
commit
fcb52609e4
3 changed files with 142 additions and 130 deletions
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@ -69,34 +69,33 @@ big_string
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012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890
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show profiles;
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Query_ID Duration Query
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1 # set session profiling = ON
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2 # set session profiling_history_size=30
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3 # show session variables like 'profil%'
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4 # select @@profiling
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5 # create table t1 (
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1 # set session profiling_history_size=30
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2 # show session variables like 'profil%'
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3 # select @@profiling
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4 # create table t1 (
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a int,
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b int
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)
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6 # insert into t1 values (1,1), (2,null), (3, 4)
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7 # insert into t1 values (5,1), (6,null), (7, 4)
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8 # insert into t1 values (1,1), (2,null), (3, 4)
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9 # insert into t1 values (5,1), (6,null), (7, 4)
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10 # select max(x) from (select sum(a) as x from t1 group by b) as teeone
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11 # insert into t1 select * from t1
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12 # select count(*) from t1
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5 # insert into t1 values (1,1), (2,null), (3, 4)
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6 # insert into t1 values (5,1), (6,null), (7, 4)
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7 # insert into t1 values (1,1), (2,null), (3, 4)
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8 # insert into t1 values (5,1), (6,null), (7, 4)
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9 # select max(x) from (select sum(a) as x from t1 group by b) as teeone
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10 # insert into t1 select * from t1
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11 # select count(*) from t1
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12 # insert into t1 select * from t1
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13 # insert into t1 select * from t1
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14 # insert into t1 select * from t1
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15 # insert into t1 select * from t1
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16 # select count(*) from t1
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15 # select count(*) from t1
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16 # insert into t1 select * from t1
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17 # insert into t1 select * from t1
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18 # insert into t1 select * from t1
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19 # insert into t1 select * from t1
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20 # select count(*) from t1
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21 # select sum(a) from t1
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22 # select sum(a) from t1 group by b
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23 # select sum(a) + sum(b) from t1 group by b
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24 # select max(x) from (select sum(a) as x from t1 group by b) as teeone
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25 # select '0123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345
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19 # select count(*) from t1
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20 # select sum(a) from t1
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21 # select sum(a) from t1 group by b
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22 # select sum(a) + sum(b) from t1 group by b
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23 # select max(x) from (select sum(a) as x from t1 group by b) as teeone
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24 # select '0123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345
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show profile for query 15;
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show profile cpu for query 15;
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show profile cpu, block io for query 15;
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@ -131,36 +130,36 @@ insert into t2 values (1), (2), (3);
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insert into t3 values (1), (2), (3);
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show profiles;
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Query_ID Duration Query
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11 # insert into t1 select * from t1
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12 # select count(*) from t1
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10 # insert into t1 select * from t1
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11 # select count(*) from t1
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12 # insert into t1 select * from t1
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13 # insert into t1 select * from t1
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14 # insert into t1 select * from t1
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15 # insert into t1 select * from t1
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16 # select count(*) from t1
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15 # select count(*) from t1
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16 # insert into t1 select * from t1
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17 # insert into t1 select * from t1
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18 # insert into t1 select * from t1
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19 # insert into t1 select * from t1
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20 # select count(*) from t1
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21 # select sum(a) from t1
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22 # select sum(a) from t1 group by b
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23 # select sum(a) + sum(b) from t1 group by b
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24 # select max(x) from (select sum(a) as x from t1 group by b) as teeone
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25 # select '0123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345
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26 # select * from information_schema.profiling
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27 # select query_id, state, duration from information_schema.profiling
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28 # select query_id, sum(duration) from information_schema.profiling group by query_id
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29 # select query_id, count(*) from information_schema.profiling group by query_id
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30 # select sum(duration) from information_schema.profiling
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31 # select query_id, count(*), sum(duration) from information_schema.profiling group by query_id
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32 # select CPU_user, CPU_system, Context_voluntary, Context_involuntary, Block_ops_in, Block_ops_out, Messages_sent, Messages_received, Page_faults_major, Page_faults_minor, Swaps, Source_function, Source_file, Source_line from information_schema.profiling
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33 # drop table if exists t1, t2, t3
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34 # SHOW WARNINGS
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35 # create table t1 (id int )
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36 # create table t2 (id int not null)
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37 # create table t3 (id int not null primary key)
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38 # insert into t1 values (1), (2), (3)
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39 # insert into t2 values (1), (2), (3)
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40 # insert into t3 values (1), (2), (3)
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19 # select count(*) from t1
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20 # select sum(a) from t1
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21 # select sum(a) from t1 group by b
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22 # select sum(a) + sum(b) from t1 group by b
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23 # select max(x) from (select sum(a) as x from t1 group by b) as teeone
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24 # select '0123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345
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25 # select * from information_schema.profiling
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26 # select query_id, state, duration from information_schema.profiling
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27 # select query_id, sum(duration) from information_schema.profiling group by query_id
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28 # select query_id, count(*) from information_schema.profiling group by query_id
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29 # select sum(duration) from information_schema.profiling
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30 # select query_id, count(*), sum(duration) from information_schema.profiling group by query_id
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31 # select CPU_user, CPU_system, Context_voluntary, Context_involuntary, Block_ops_in, Block_ops_out, Messages_sent, Messages_received, Page_faults_major, Page_faults_minor, Swaps, Source_function, Source_file, Source_line from information_schema.profiling
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32 # drop table if exists t1, t2, t3
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33 # SHOW WARNINGS
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34 # create table t1 (id int )
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35 # create table t2 (id int not null)
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36 # create table t3 (id int not null primary key)
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37 # insert into t1 values (1), (2), (3)
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38 # insert into t2 values (1), (2), (3)
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39 # insert into t3 values (1), (2), (3)
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select * from t1;
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id
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1
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@ -168,36 +167,36 @@ id
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3
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show profiles;
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Query_ID Duration Query
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12 # select count(*) from t1
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11 # select count(*) from t1
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12 # insert into t1 select * from t1
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13 # insert into t1 select * from t1
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14 # insert into t1 select * from t1
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15 # insert into t1 select * from t1
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16 # select count(*) from t1
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15 # select count(*) from t1
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16 # insert into t1 select * from t1
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17 # insert into t1 select * from t1
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18 # insert into t1 select * from t1
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19 # insert into t1 select * from t1
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20 # select count(*) from t1
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21 # select sum(a) from t1
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22 # select sum(a) from t1 group by b
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23 # select sum(a) + sum(b) from t1 group by b
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24 # select max(x) from (select sum(a) as x from t1 group by b) as teeone
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25 # select '0123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345
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26 # select * from information_schema.profiling
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27 # select query_id, state, duration from information_schema.profiling
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28 # select query_id, sum(duration) from information_schema.profiling group by query_id
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29 # select query_id, count(*) from information_schema.profiling group by query_id
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30 # select sum(duration) from information_schema.profiling
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31 # select query_id, count(*), sum(duration) from information_schema.profiling group by query_id
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32 # select CPU_user, CPU_system, Context_voluntary, Context_involuntary, Block_ops_in, Block_ops_out, Messages_sent, Messages_received, Page_faults_major, Page_faults_minor, Swaps, Source_function, Source_file, Source_line from information_schema.profiling
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33 # drop table if exists t1, t2, t3
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34 # SHOW WARNINGS
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35 # create table t1 (id int )
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36 # create table t2 (id int not null)
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37 # create table t3 (id int not null primary key)
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38 # insert into t1 values (1), (2), (3)
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39 # insert into t2 values (1), (2), (3)
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40 # insert into t3 values (1), (2), (3)
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41 # select * from t1
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19 # select count(*) from t1
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20 # select sum(a) from t1
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21 # select sum(a) from t1 group by b
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22 # select sum(a) + sum(b) from t1 group by b
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23 # select max(x) from (select sum(a) as x from t1 group by b) as teeone
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24 # select '0123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345
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25 # select * from information_schema.profiling
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26 # select query_id, state, duration from information_schema.profiling
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27 # select query_id, sum(duration) from information_schema.profiling group by query_id
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28 # select query_id, count(*) from information_schema.profiling group by query_id
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29 # select sum(duration) from information_schema.profiling
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30 # select query_id, count(*), sum(duration) from information_schema.profiling group by query_id
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31 # select CPU_user, CPU_system, Context_voluntary, Context_involuntary, Block_ops_in, Block_ops_out, Messages_sent, Messages_received, Page_faults_major, Page_faults_minor, Swaps, Source_function, Source_file, Source_line from information_schema.profiling
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32 # drop table if exists t1, t2, t3
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33 # SHOW WARNINGS
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34 # create table t1 (id int )
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35 # create table t2 (id int not null)
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36 # create table t3 (id int not null primary key)
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37 # insert into t1 values (1), (2), (3)
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38 # insert into t2 values (1), (2), (3)
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39 # insert into t3 values (1), (2), (3)
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40 # select * from t1
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This ^^ should end in "select * from t1;"
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delete from t1;
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insert into t1 values (1), (2), (3);
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3
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show profiles;
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Query_ID Duration Query
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16 # select count(*) from t1
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15 # select count(*) from t1
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16 # insert into t1 select * from t1
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17 # insert into t1 select * from t1
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18 # insert into t1 select * from t1
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19 # insert into t1 select * from t1
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20 # select count(*) from t1
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21 # select sum(a) from t1
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22 # select sum(a) from t1 group by b
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23 # select sum(a) + sum(b) from t1 group by b
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24 # select max(x) from (select sum(a) as x from t1 group by b) as teeone
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25 # select '0123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345
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26 # select * from information_schema.profiling
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27 # select query_id, state, duration from information_schema.profiling
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28 # select query_id, sum(duration) from information_schema.profiling group by query_id
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29 # select query_id, count(*) from information_schema.profiling group by query_id
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30 # select sum(duration) from information_schema.profiling
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31 # select query_id, count(*), sum(duration) from information_schema.profiling group by query_id
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32 # select CPU_user, CPU_system, Context_voluntary, Context_involuntary, Block_ops_in, Block_ops_out, Messages_sent, Messages_received, Page_faults_major, Page_faults_minor, Swaps, Source_function, Source_file, Source_line from information_schema.profiling
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33 # drop table if exists t1, t2, t3
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34 # SHOW WARNINGS
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35 # create table t1 (id int )
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36 # create table t2 (id int not null)
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37 # create table t3 (id int not null primary key)
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38 # insert into t1 values (1), (2), (3)
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39 # insert into t2 values (1), (2), (3)
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40 # insert into t3 values (1), (2), (3)
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41 # select * from t1
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42 # delete from t1
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19 # select count(*) from t1
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20 # select sum(a) from t1
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21 # select sum(a) from t1 group by b
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22 # select sum(a) + sum(b) from t1 group by b
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23 # select max(x) from (select sum(a) as x from t1 group by b) as teeone
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24 # select '0123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345
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25 # select * from information_schema.profiling
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26 # select query_id, state, duration from information_schema.profiling
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27 # select query_id, sum(duration) from information_schema.profiling group by query_id
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28 # select query_id, count(*) from information_schema.profiling group by query_id
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29 # select sum(duration) from information_schema.profiling
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30 # select query_id, count(*), sum(duration) from information_schema.profiling group by query_id
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31 # select CPU_user, CPU_system, Context_voluntary, Context_involuntary, Block_ops_in, Block_ops_out, Messages_sent, Messages_received, Page_faults_major, Page_faults_minor, Swaps, Source_function, Source_file, Source_line from information_schema.profiling
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32 # drop table if exists t1, t2, t3
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33 # SHOW WARNINGS
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34 # create table t1 (id int )
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35 # create table t2 (id int not null)
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36 # create table t3 (id int not null primary key)
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37 # insert into t1 values (1), (2), (3)
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38 # insert into t2 values (1), (2), (3)
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39 # insert into t3 values (1), (2), (3)
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40 # select * from t1
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41 # delete from t1
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42 # insert into t1 values (1), (2), (3)
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43 # insert into t1 values (1), (2), (3)
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44 # insert into t1 values (1), (2), (3)
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45 # select * from t1
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44 # select * from t1
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set session profiling = OFF;
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select sum(id) from t1;
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sum(id)
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12
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show profiles;
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Query_ID Duration Query
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16 # select count(*) from t1
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15 # select count(*) from t1
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16 # insert into t1 select * from t1
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17 # insert into t1 select * from t1
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18 # insert into t1 select * from t1
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19 # insert into t1 select * from t1
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20 # select count(*) from t1
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21 # select sum(a) from t1
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22 # select sum(a) from t1 group by b
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23 # select sum(a) + sum(b) from t1 group by b
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24 # select max(x) from (select sum(a) as x from t1 group by b) as teeone
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25 # select '0123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345
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26 # select * from information_schema.profiling
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27 # select query_id, state, duration from information_schema.profiling
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28 # select query_id, sum(duration) from information_schema.profiling group by query_id
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29 # select query_id, count(*) from information_schema.profiling group by query_id
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30 # select sum(duration) from information_schema.profiling
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31 # select query_id, count(*), sum(duration) from information_schema.profiling group by query_id
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32 # select CPU_user, CPU_system, Context_voluntary, Context_involuntary, Block_ops_in, Block_ops_out, Messages_sent, Messages_received, Page_faults_major, Page_faults_minor, Swaps, Source_function, Source_file, Source_line from information_schema.profiling
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33 # drop table if exists t1, t2, t3
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34 # SHOW WARNINGS
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35 # create table t1 (id int )
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36 # create table t2 (id int not null)
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37 # create table t3 (id int not null primary key)
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38 # insert into t1 values (1), (2), (3)
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39 # insert into t2 values (1), (2), (3)
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40 # insert into t3 values (1), (2), (3)
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41 # select * from t1
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42 # delete from t1
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19 # select count(*) from t1
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20 # select sum(a) from t1
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21 # select sum(a) from t1 group by b
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22 # select sum(a) + sum(b) from t1 group by b
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23 # select max(x) from (select sum(a) as x from t1 group by b) as teeone
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24 # select '0123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345
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25 # select * from information_schema.profiling
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26 # select query_id, state, duration from information_schema.profiling
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27 # select query_id, sum(duration) from information_schema.profiling group by query_id
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28 # select query_id, count(*) from information_schema.profiling group by query_id
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29 # select sum(duration) from information_schema.profiling
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30 # select query_id, count(*), sum(duration) from information_schema.profiling group by query_id
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||||
31 # select CPU_user, CPU_system, Context_voluntary, Context_involuntary, Block_ops_in, Block_ops_out, Messages_sent, Messages_received, Page_faults_major, Page_faults_minor, Swaps, Source_function, Source_file, Source_line from information_schema.profiling
|
||||
32 # drop table if exists t1, t2, t3
|
||||
33 # SHOW WARNINGS
|
||||
34 # create table t1 (id int )
|
||||
35 # create table t2 (id int not null)
|
||||
36 # create table t3 (id int not null primary key)
|
||||
37 # insert into t1 values (1), (2), (3)
|
||||
38 # insert into t2 values (1), (2), (3)
|
||||
39 # insert into t3 values (1), (2), (3)
|
||||
40 # select * from t1
|
||||
41 # delete from t1
|
||||
42 # insert into t1 values (1), (2), (3)
|
||||
43 # insert into t1 values (1), (2), (3)
|
||||
44 # insert into t1 values (1), (2), (3)
|
||||
45 # select * from t1
|
||||
44 # select * from t1
|
||||
set session profiling = ON;
|
||||
select @@profiling;
|
||||
@@profiling
|
||||
|
|
|
@ -168,10 +168,14 @@ QUERY_PROFILE::QUERY_PROFILE(PROFILING *profiling_arg, char *query_source_arg,
|
|||
void QUERY_PROFILE::set_query_source(char *query_source_arg,
|
||||
uint query_length_arg)
|
||||
{
|
||||
if (! profiling->enabled)
|
||||
return;
|
||||
|
||||
/* Truncate to avoid DoS attacks. */
|
||||
uint length= min(MAX_QUERY_LENGTH, query_length_arg);
|
||||
/* TODO?: Provide a way to include the full text, as in SHOW PROCESSLIST. */
|
||||
|
||||
DBUG_ASSERT(query_source == NULL);
|
||||
if (query_source_arg != NULL)
|
||||
query_source= my_strdup_with_length(query_source_arg, length, MYF(0));
|
||||
}
|
||||
|
@ -445,7 +449,7 @@ bool QUERY_PROFILE::show(uint options)
|
|||
}
|
||||
|
||||
PROFILING::PROFILING()
|
||||
:profile_id_counter(1), keeping(1), current(NULL), last(NULL)
|
||||
:profile_id_counter(1), keeping(TRUE), enabled(FALSE), current(NULL), last(NULL)
|
||||
{
|
||||
}
|
||||
|
||||
|
@ -464,7 +468,7 @@ void PROFILING::status_change(const char *status_arg,
|
|||
{
|
||||
DBUG_ENTER("PROFILING::status_change");
|
||||
|
||||
if (unlikely((thd->options & OPTION_PROFILING) != 0))
|
||||
if (unlikely(enabled))
|
||||
{
|
||||
if (unlikely(current == NULL))
|
||||
reset();
|
||||
|
@ -499,6 +503,8 @@ void PROFILING::store()
|
|||
if (current != NULL)
|
||||
{
|
||||
if (keeping &&
|
||||
(enabled) && /* ON at start? */
|
||||
(((thd)->options & OPTION_PROFILING) != 0) && /* and ON at end? */
|
||||
(current->query_source != NULL) &&
|
||||
(current->query_source[0] != '\0') &&
|
||||
(!current->entries.is_empty()))
|
||||
|
@ -517,7 +523,8 @@ void PROFILING::store()
|
|||
}
|
||||
|
||||
DBUG_ASSERT(current == NULL);
|
||||
current= new QUERY_PROFILE(this, thd->query, thd->query_length);
|
||||
if (enabled)
|
||||
current= new QUERY_PROFILE(this, thd->query, thd->query_length);
|
||||
|
||||
DBUG_VOID_RETURN;
|
||||
}
|
||||
|
@ -534,7 +541,12 @@ void PROFILING::reset()
|
|||
store();
|
||||
|
||||
if (likely(((thd)->options & OPTION_PROFILING) == 0))
|
||||
{
|
||||
enabled= FALSE;
|
||||
DBUG_VOID_RETURN;
|
||||
}
|
||||
else
|
||||
enabled= TRUE;
|
||||
|
||||
if (current != NULL)
|
||||
current->reset();
|
||||
|
|
|
@ -277,6 +277,7 @@ private:
|
|||
query_id_t profile_id_counter;
|
||||
THD *thd;
|
||||
bool keeping;
|
||||
bool enabled;
|
||||
|
||||
QUERY_PROFILE *current;
|
||||
QUERY_PROFILE *last;
|
||||
|
|
Loading…
Add table
Reference in a new issue