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Commit db9672cf authored by Alexey Kopytov's avatar Alexey Kopytov
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Manual merge from mysql-5.1-bugteam to mysql-trunk-merge. 

Conflicts:

Text conflict in tests/mysql_client_test.c
parents d83cb8c7 1c5200f6
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Showing with 301 additions and 69 deletions
mysql-test/r/range.result
View file @ db9672cf
......@@ -1653,4 +1653,48 @@ a b
0 0
1 1
DROP TABLE t1;
#
# Bug#50939: Loose Index Scan unduly relies on engine to remember range
# endpoints
#
CREATE TABLE t1 (
a INT,
b INT,
KEY ( a, b )
) PARTITION BY HASH (a) PARTITIONS 1;
CREATE TABLE t2 (
a INT,
b INT,
KEY ( a, b )
);
INSERT INTO t1 VALUES (1, 1), (2, 2), (3, 3), (4, 4), (5, 5);
INSERT INTO t1 SELECT a + 5, b + 5 FROM t1;
INSERT INTO t1 SELECT a + 10, b + 10 FROM t1;
INSERT INTO t1 SELECT a + 20, b + 20 FROM t1;
INSERT INTO t1 SELECT a + 40, b + 40 FROM t1;
INSERT INTO t2 SELECT * FROM t1;
# plans should be identical
EXPLAIN SELECT a, MAX(b) FROM t1 WHERE a IN (10,100) GROUP BY a;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 range a a 5 NULL 1 Using where; Using index for group-by
EXPLAIN SELECT a, MAX(b) FROM t2 WHERE a IN (10,100) GROUP BY a;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t2 range a a 5 NULL 2 Using where; Using index for group-by
FLUSH status;
SELECT a, MAX(b) FROM t1 WHERE a IN (10, 100) GROUP BY a;
a MAX(b)
10 10
# Should be no more than 4 reads.
SHOW status LIKE 'handler_read_key';
Variable_name Value
Handler_read_key 4
FLUSH status;
SELECT a, MAX(b) FROM t2 WHERE a IN (10, 100) GROUP BY a;
a MAX(b)
10 10
# Should be no more than 4 reads.
SHOW status LIKE 'handler_read_key';
Variable_name Value
Handler_read_key 4
DROP TABLE t1, t2;
End of 5.1 tests
mysql-test/t/range.test
View file @ db9672cf
......@@ -1313,4 +1313,45 @@ SELECT * FROM t1 FORCE INDEX (PRIMARY)
DROP TABLE t1;
--echo #
--echo # Bug#50939: Loose Index Scan unduly relies on engine to remember range
--echo # endpoints
--echo #
CREATE TABLE t1 (
a INT,
b INT,
KEY ( a, b )
) PARTITION BY HASH (a) PARTITIONS 1;
CREATE TABLE t2 (
a INT,
b INT,
KEY ( a, b )
);
INSERT INTO t1 VALUES (1, 1), (2, 2), (3, 3), (4, 4), (5, 5);
INSERT INTO t1 SELECT a + 5, b + 5 FROM t1;
INSERT INTO t1 SELECT a + 10, b + 10 FROM t1;
INSERT INTO t1 SELECT a + 20, b + 20 FROM t1;
INSERT INTO t1 SELECT a + 40, b + 40 FROM t1;
INSERT INTO t2 SELECT * FROM t1;
--echo # plans should be identical
EXPLAIN SELECT a, MAX(b) FROM t1 WHERE a IN (10,100) GROUP BY a;
EXPLAIN SELECT a, MAX(b) FROM t2 WHERE a IN (10,100) GROUP BY a;
FLUSH status;
SELECT a, MAX(b) FROM t1 WHERE a IN (10, 100) GROUP BY a;
--echo # Should be no more than 4 reads.
SHOW status LIKE 'handler_read_key';
FLUSH status;
SELECT a, MAX(b) FROM t2 WHERE a IN (10, 100) GROUP BY a;
--echo # Should be no more than 4 reads.
SHOW status LIKE 'handler_read_key';
DROP TABLE t1, t2;
--echo End of 5.1 tests
sql-common/client.c
View file @ db9672cf
......@@ -2884,6 +2884,11 @@ CLI_MYSQL_REAL_CONNECT(MYSQL *mysql,const char *host, const char *user,
goto error;
}
/*
Using init_commands is not supported when connecting from within the
server.
*/
#ifndef MYSQL_SERVER
if (mysql->options.init_commands)
{
DYNAMIC_ARRAY *init_commands= mysql->options.init_commands;
......@@ -2895,18 +2900,26 @@ CLI_MYSQL_REAL_CONNECT(MYSQL *mysql,const char *host, const char *user,
for (; ptr < end_command; ptr++)
{
MYSQL_RES *res;
int status;
if (mysql_real_query(mysql,*ptr, (ulong) strlen(*ptr)))
goto error;
if (mysql->fields)
{
if (!(res= cli_use_result(mysql)))
goto error;
mysql_free_result(res);
}
do {
if (mysql->fields)
{
MYSQL_RES *res;
if (!(res= cli_use_result(mysql)))
goto error;
mysql_free_result(res);
}
if ((status= mysql_next_result(mysql)) > 0)
goto error;
} while (status == 0);
}
mysql->reconnect=reconnect;
}
#endif
DBUG_PRINT("exit", ("Mysql handler: 0x%lx", (long) mysql));
reset_sigpipe(mysql);
......
sql/opt_range.cc
View file @ db9672cf
......@@ -8717,8 +8717,6 @@ int QUICK_RANGE_SELECT::get_next()
{
int result;
KEY_MULTI_RANGE *mrange;
key_range *start_key;
key_range *end_key;
DBUG_ENTER("QUICK_RANGE_SELECT::get_next");
DBUG_ASSERT(multi_range_length && multi_range &&
(cur_range >= (QUICK_RANGE**) ranges.buffer) &&
......@@ -8758,26 +8756,9 @@ int QUICK_RANGE_SELECT::get_next()
mrange_slot < mrange_end;
mrange_slot++)
{
start_key= &mrange_slot->start_key;
end_key= &mrange_slot->end_key;
last_range= *(cur_range++);
start_key->key= (const uchar*) last_range->min_key;
start_key->length= last_range->min_length;
start_key->flag= ((last_range->flag & NEAR_MIN) ? HA_READ_AFTER_KEY :
(last_range->flag & EQ_RANGE) ?
HA_READ_KEY_EXACT : HA_READ_KEY_OR_NEXT);
start_key->keypart_map= last_range->min_keypart_map;
end_key->key= (const uchar*) last_range->max_key;
end_key->length= last_range->max_length;
/*
We use HA_READ_AFTER_KEY here because if we are reading on a key
prefix. We want to find all keys with this prefix.
*/
end_key->flag= (last_range->flag & NEAR_MAX ? HA_READ_BEFORE_KEY :
HA_READ_AFTER_KEY);
end_key->keypart_map= last_range->max_keypart_map;
last_range->make_min_endpoint(&mrange_slot->start_key);
last_range->make_max_endpoint(&mrange_slot->end_key);
mrange_slot->range_flag= last_range->flag;
}
......@@ -8801,49 +8782,52 @@ int QUICK_RANGE_SELECT::get_next()
/*
Get the next record with a different prefix.
SYNOPSIS
QUICK_RANGE_SELECT::get_next_prefix()
prefix_length length of cur_prefix
cur_prefix prefix of a key to be searched for
@param prefix_length length of cur_prefix
@param group_key_parts The number of key parts in the group prefix
@param cur_prefix prefix of a key to be searched for
DESCRIPTION
Each subsequent call to the method retrieves the first record that has a
prefix with length prefix_length different from cur_prefix, such that the
record with the new prefix is within the ranges described by
this->ranges. The record found is stored into the buffer pointed by
this->record.
The method is useful for GROUP-BY queries with range conditions to
discover the prefix of the next group that satisfies the range conditions.
Each subsequent call to the method retrieves the first record that has a
prefix with length prefix_length and which is different from cur_prefix,
such that the record with the new prefix is within the ranges described by
this->ranges. The record found is stored into the buffer pointed by
this->record. The method is useful for GROUP-BY queries with range
conditions to discover the prefix of the next group that satisfies the range
conditions.
@todo
TODO
This method is a modified copy of QUICK_RANGE_SELECT::get_next(), so both
methods should be unified into a more general one to reduce code
duplication.
RETURN
0 on success
HA_ERR_END_OF_FILE if returned all keys
other if some error occurred
@retval 0 on success
@retval HA_ERR_END_OF_FILE if returned all keys
@retval other if some error occurred
*/
int QUICK_RANGE_SELECT::get_next_prefix(uint prefix_length,
key_part_map keypart_map,
uint group_key_parts,
uchar *cur_prefix)
{
DBUG_ENTER("QUICK_RANGE_SELECT::get_next_prefix");
const key_part_map keypart_map= make_prev_keypart_map(group_key_parts);
for (;;)
{
int result;
key_range start_key, end_key;
if (last_range)
{
/* Read the next record in the same range with prefix after cur_prefix. */
DBUG_ASSERT(cur_prefix != 0);
DBUG_ASSERT(cur_prefix != NULL);
result= file->index_read_map(record, cur_prefix, keypart_map,
HA_READ_AFTER_KEY);
if (result || (file->compare_key(file->end_range) <= 0))
if (result || last_range->max_keypart_map == 0)
DBUG_RETURN(result);
key_range previous_endpoint;
last_range->make_max_endpoint(&previous_endpoint, prefix_length, keypart_map);
if (file->compare_key(&previous_endpoint) <= 0)
DBUG_RETURN(0);
}
uint count= ranges.elements - (cur_range - (QUICK_RANGE**) ranges.buffer);
......@@ -8855,21 +8839,9 @@ int QUICK_RANGE_SELECT::get_next_prefix(uint prefix_length,
}
last_range= *(cur_range++);
start_key.key= (const uchar*) last_range->min_key;
start_key.length= min(last_range->min_length, prefix_length);
start_key.keypart_map= last_range->min_keypart_map & keypart_map;
start_key.flag= ((last_range->flag & NEAR_MIN) ? HA_READ_AFTER_KEY :
(last_range->flag & EQ_RANGE) ?
HA_READ_KEY_EXACT : HA_READ_KEY_OR_NEXT);
end_key.key= (const uchar*) last_range->max_key;
end_key.length= min(last_range->max_length, prefix_length);
end_key.keypart_map= last_range->max_keypart_map & keypart_map;
/*
We use READ_AFTER_KEY here because if we are reading on a key
prefix we want to find all keys with this prefix
*/
end_key.flag= (last_range->flag & NEAR_MAX ? HA_READ_BEFORE_KEY :
HA_READ_AFTER_KEY);
key_range start_key, end_key;
last_range->make_min_endpoint(&start_key, prefix_length, keypart_map);
last_range->make_max_endpoint(&end_key, prefix_length, keypart_map);
result= file->read_range_first(last_range->min_keypart_map ? &start_key : 0,
last_range->max_keypart_map ? &end_key : 0,
......@@ -8964,9 +8936,9 @@ bool QUICK_RANGE_SELECT::row_in_ranges()
}
/*
This is a hack: we inherit from QUICK_SELECT so that we can use the
This is a hack: we inherit from QUICK_RANGE_SELECT so that we can use the
get_next() interface, but we have to hold a pointer to the original
QUICK_SELECT because its data are used all over the place. What
QUICK_RANGE_SELECT because its data are used all over the place. What
should be done is to factor out the data that is needed into a base
class (QUICK_SELECT), and then have two subclasses (_ASC and _DESC)
which handle the ranges and implement the get_next() function. But
......@@ -11159,7 +11131,8 @@ int QUICK_GROUP_MIN_MAX_SELECT::next_prefix()
{
uchar *cur_prefix= seen_first_key ? group_prefix : NULL;
if ((result= quick_prefix_select->get_next_prefix(group_prefix_len,
make_prev_keypart_map(group_key_parts), cur_prefix)))
group_key_parts,
cur_prefix)))
DBUG_RETURN(result);
seen_first_key= TRUE;
}
......
sql/opt_range.h
View file @ db9672cf
......@@ -79,6 +79,85 @@ class QUICK_RANGE :public Sql_alloc {
dummy=0;
#endif
}
/**
Initalizes a key_range object for communication with storage engine.
This function facilitates communication with the Storage Engine API by
translating the minimum endpoint of the interval represented by this
QUICK_RANGE into an index range endpoint specifier for the engine.
@param Pointer to an uninitialized key_range C struct.
@param prefix_length The length of the search key prefix to be used for
lookup.
@param keypart_map A set (bitmap) of keyparts to be used.
*/
void make_min_endpoint(key_range *kr, uint prefix_length,
key_part_map keypart_map) {
make_min_endpoint(kr);
kr->length= min(kr->length, prefix_length);
kr->keypart_map&= keypart_map;
}
/**
Initalizes a key_range object for communication with storage engine.
This function facilitates communication with the Storage Engine API by
translating the minimum endpoint of the interval represented by this
QUICK_RANGE into an index range endpoint specifier for the engine.
@param Pointer to an uninitialized key_range C struct.
*/
void make_min_endpoint(key_range *kr) {
kr->key= (const uchar*)min_key;
kr->length= min_length;
kr->keypart_map= min_keypart_map;
kr->flag= ((flag & NEAR_MIN) ? HA_READ_AFTER_KEY :
(flag & EQ_RANGE) ? HA_READ_KEY_EXACT : HA_READ_KEY_OR_NEXT);
}
/**
Initalizes a key_range object for communication with storage engine.
This function facilitates communication with the Storage Engine API by
translating the maximum endpoint of the interval represented by this
QUICK_RANGE into an index range endpoint specifier for the engine.
@param Pointer to an uninitialized key_range C struct.
@param prefix_length The length of the search key prefix to be used for
lookup.
@param keypart_map A set (bitmap) of keyparts to be used.
*/
void make_max_endpoint(key_range *kr, uint prefix_length,
key_part_map keypart_map) {
make_max_endpoint(kr);
kr->length= min(kr->length, prefix_length);
kr->keypart_map&= keypart_map;
}
/**
Initalizes a key_range object for communication with storage engine.
This function facilitates communication with the Storage Engine API by
translating the maximum endpoint of the interval represented by this
QUICK_RANGE into an index range endpoint specifier for the engine.
@param Pointer to an uninitialized key_range C struct.
*/
void make_max_endpoint(key_range *kr) {
kr->key= (const uchar*)max_key;
kr->length= max_length;
kr->keypart_map= max_keypart_map;
/*
We use READ_AFTER_KEY here because if we are reading on a key
prefix we want to find all keys with this prefix
*/
kr->flag= (flag & NEAR_MAX ? HA_READ_BEFORE_KEY : HA_READ_AFTER_KEY);
}
};
......@@ -345,7 +424,7 @@ class QUICK_RANGE_SELECT : public QUICK_SELECT_I
int reset(void);
int get_next();
void range_end();
int get_next_prefix(uint prefix_length, key_part_map keypart_map,
int get_next_prefix(uint prefix_length, uint group_key_parts,
uchar *cur_prefix);
bool reverse_sorted() { return 0; }
bool unique_key_range();
......@@ -625,7 +704,7 @@ class QUICK_GROUP_MIN_MAX_SELECT : public QUICK_SELECT_I
uchar *record; /* Buffer where the next record is returned. */
uchar *tmp_record; /* Temporary storage for next_min(), next_max(). */
uchar *group_prefix; /* Key prefix consisting of the GROUP fields. */
uint group_prefix_len; /* Length of the group prefix. */
const uint group_prefix_len; /* Length of the group prefix. */
uint group_key_parts; /* A number of keyparts in the group prefix */
uchar *last_prefix; /* Prefix of the last group for detecting EOF. */
bool have_min; /* Specify whether we are computing */
......
tests/mysql_client_test.c
View file @ db9672cf
......@@ -18979,6 +18979,87 @@ static void test_bug53371()
}
/**
Bug#42373: libmysql can mess a connection at connect
*/
static void test_bug42373()
{
int rc;
MYSQL con;
MYSQL_STMT *stmt;
DBUG_ENTER("test_bug42373");
myheader("test_42373");
rc= mysql_query(mysql, "DROP PROCEDURE IF EXISTS p1");
myquery(rc);
rc= mysql_query(mysql, "CREATE PROCEDURE p1()"
" BEGIN"
" SELECT 1;"
" INSERT INTO t1 VALUES (2);"
"END;");
myquery(rc);
rc= mysql_query(mysql, "DROP TABLE IF EXISTS t1");
myquery(rc);
rc= mysql_query(mysql, "CREATE TABLE t1 (a INT)");
myquery(rc);
/* Try with a stored procedure. */
DIE_UNLESS(mysql_client_init(&con));
mysql_options(&con, MYSQL_INIT_COMMAND, "CALL p1()");
DIE_UNLESS(mysql_real_connect(&con, opt_host, opt_user, opt_password,
current_db, opt_port, opt_unix_socket,
CLIENT_MULTI_STATEMENTS|CLIENT_MULTI_RESULTS));
stmt= mysql_simple_prepare(&con, "SELECT a FROM t1");
check_stmt(stmt);
rc= mysql_stmt_execute(stmt);
check_execute(stmt, rc);
rc= my_process_stmt_result(stmt);
DIE_UNLESS(rc == 1);
mysql_stmt_close(stmt);
/* Now try with a multi-statement. */
DIE_UNLESS(mysql_client_init(&con));
mysql_options(&con, MYSQL_INIT_COMMAND,
"SELECT 3; INSERT INTO t1 VALUES (4)");
DIE_UNLESS(mysql_real_connect(&con, opt_host, opt_user, opt_password,
current_db, opt_port, opt_unix_socket,
CLIENT_MULTI_STATEMENTS|CLIENT_MULTI_RESULTS));
stmt= mysql_simple_prepare(&con, "SELECT a FROM t1");
check_stmt(stmt);
rc= mysql_stmt_execute(stmt);
check_execute(stmt, rc);
rc= my_process_stmt_result(stmt);
DIE_UNLESS(rc == 2);
mysql_stmt_close(stmt);
mysql_close(&con);
rc= mysql_query(mysql, "DROP TABLE t1");
myquery(rc);
rc= mysql_query(mysql, "DROP PROCEDURE p1");
myquery(rc);
DBUG_VOID_RETURN;
}
/*
Bug#49972: Crash in prepared statements.
......@@ -19419,6 +19500,7 @@ static struct my_tests_st my_tests[]= {
{ "test_bug41078", test_bug41078 },
{ "test_bug44495", test_bug44495 },
{ "test_bug49972", test_bug49972 },
{ "test_bug42373", test_bug42373 },
{ 0, 0 }
};
......
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