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Commit 21a60acb authored by Bjorn Munch's avatar Bjorn Munch
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merge from 5.1 main

parents 06c43adc 44d23cdb
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Showing with 233 additions and 57 deletions
client/mysqladmin.cc
View file @ 21a60acb
......@@ -416,6 +416,9 @@ int main(int argc,char *argv[])
if (interval) /* --sleep=interval given */
{
if (opt_count_iterations && --nr_iterations == 0)
break;
/*
If connection was dropped (unintentionally, or due to SHUTDOWN),
re-establish it if --wait ("retry-connect") was given and user
......
client/mysqldump.c
View file @ 21a60acb
......@@ -2247,6 +2247,15 @@ static uint get_table_structure(char *table, char *db, char *table_type,
const char *insert_option;
char name_buff[NAME_LEN+3],table_buff[NAME_LEN*2+3];
char table_buff2[NAME_LEN*2+3], query_buff[QUERY_LENGTH];
const char *show_fields_stmt= "SELECT `COLUMN_NAME` AS `Field`, "
"`COLUMN_TYPE` AS `Type`, "
"`IS_NULLABLE` AS `Null`, "
"`COLUMN_KEY` AS `Key`, "
"`COLUMN_DEFAULT` AS `Default`, "
"`EXTRA` AS `Extra`, "
"`COLUMN_COMMENT` AS `Comment` "
"FROM `INFORMATION_SCHEMA`.`COLUMNS` WHERE "
"TABLE_SCHEMA = '%s' AND TABLE_NAME = '%s'";
FILE *sql_file= md_result_file;
int len;
MYSQL_RES *result;
......@@ -2514,8 +2523,8 @@ static uint get_table_structure(char *table, char *db, char *table_type,
verbose_msg("%s: Warning: Can't set SQL_QUOTE_SHOW_CREATE option (%s)\n",
my_progname, mysql_error(mysql));
my_snprintf(query_buff, sizeof(query_buff), "show fields from %s",
result_table);
my_snprintf(query_buff, sizeof(query_buff), show_fields_stmt, db, table);
if (mysql_query_with_error_report(mysql, &result, query_buff))
DBUG_RETURN(0);
......
client/mysqlslap.c
View file @ 21a60acb
......@@ -1519,7 +1519,12 @@ generate_primary_key_list(MYSQL *mysql, option_string *engine_stmt)
exit(1);
}
result= mysql_store_result(mysql);
if (!(result= mysql_store_result(mysql)))
{
fprintf(stderr, "%s: Error when storing result: %d %s\n",
my_progname, mysql_errno(mysql), mysql_error(mysql));
exit(1);
}
primary_keys_number_of= mysql_num_rows(result);
/* So why check this? Blackhole :) */
......@@ -1891,10 +1896,15 @@ limit_not_met:
{
if (mysql_field_count(mysql))
{
result= mysql_store_result(mysql);
while ((row = mysql_fetch_row(result)))
counter++;
mysql_free_result(result);
if (!(result= mysql_store_result(mysql)))
fprintf(stderr, "%s: Error when storing result: %d %s\n",
my_progname, mysql_errno(mysql), mysql_error(mysql));
else
{
while ((row= mysql_fetch_row(result)))
counter++;
mysql_free_result(result);
}
}
} while(mysql_next_result(mysql) == 0);
queries++;
......
configure.in
View file @ 21a60acb
......@@ -12,7 +12,7 @@ dnl
dnl When changing the major version number please also check the switch
dnl statement in mysqlbinlog::check_master_version(). You may also need
dnl to update version.c in ndb.
AC_INIT([MySQL Server], [5.1.55], [], [mysql])
AC_INIT([MySQL Server], [5.1.56], [], [mysql])
AC_CONFIG_SRCDIR([sql/mysqld.cc])
AC_CANONICAL_SYSTEM
......
mysql-test/include/rpl_start_server.inc
View file @ 21a60acb
......@@ -45,7 +45,15 @@ if ($rpl_server_parameters)
--source include/rpl_connection.inc
# Write file to make mysql-test-run.pl start up the server again
--exec echo "$_rpl_start_server_command" > $MYSQLTEST_VARDIR/tmp/mysqld.$rpl_server_number.expect
--let WRITE_TO_FILE= $MYSQLTEST_VARDIR/tmp/mysqld.$rpl_server_number.expect
--let WRITE_TO_VAR= $_rpl_start_server_command
perl;
my $file= $ENV{'WRITE_TO_FILE'};
my $var= $ENV{'WRITE_TO_VAR'};
open WRITE_FILE, ">> $file" or die "Error opening $file: $!";
print WRITE_FILE $var, "\n" or die "Error appending to $file: $!";
close WRITE_FILE or die "Error closing $file: $!";
EOF
--source include/rpl_reconnect.inc
......
mysql-test/include/rpl_stop_server.inc
View file @ 21a60acb
......@@ -44,7 +44,9 @@ if ($rpl_debug)
# Write file to make mysql-test-run.pl expect the "crash", but don't start
# it until it's told to
--exec echo "wait" > $MYSQLTEST_VARDIR/tmp/mysqld.$rpl_server_number.expect
--append_file $MYSQLTEST_VARDIR/tmp/mysqld.$rpl_server_number.expect
wait
EOF
# Send shutdown to the connected server and give
# it 10 seconds to die before zapping it
......
mysql-test/r/client_xml.result
View file @ 21a60acb
......@@ -21,9 +21,9 @@ insert into t1 values (1, 2, 'a&b a<b a>b');
<mysqldump xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<database name="test">
<table_structure name="t1">
<field Field="a&amp;b" Type="int(11)" Null="YES" Key="" Extra="" />
<field Field="a&lt;b" Type="int(11)" Null="YES" Key="" Extra="" />
<field Field="a&gt;b" Type="text" Null="YES" Key="" Extra="" />
<field Field="a&amp;b" Type="int(11)" Null="YES" Key="" Extra="" Comment="" />
<field Field="a&lt;b" Type="int(11)" Null="YES" Key="" Extra="" Comment="" />
<field Field="a&gt;b" Type="text" Null="YES" Key="" Extra="" Comment="" />
</table_structure>
<table_data name="t1">
<row>
......
mysql-test/r/func_str.result
View file @ 21a60acb
......@@ -2612,4 +2612,20 @@ CONVERT(('' IN (REVERSE(CAST(('') AS DECIMAL)), '')), CHAR(3))
1
Warnings:
Warning 1292 Truncated incorrect DECIMAL value: ''
#
# Bug#58165: "my_empty_string" gets modified and causes LOAD DATA to fail
# and other crashes
#
CREATE TABLE t1 ( a TEXT );
SELECT 'aaaaaaaaaaaaaa' INTO OUTFILE 'bug58165.txt';
SELECT insert( substring_index( 'a', 'a', 'b' ), 1, 0, 'x' );
insert( substring_index( 'a', 'a', 'b' ), 1, 0, 'x' )
x
Warnings:
Warning 1292 Truncated incorrect INTEGER value: 'b'
LOAD DATA INFILE 'bug58165.txt' INTO TABLE t1;
SELECT * FROM t1;
a
aaaaaaaaaaaaaa
DROP TABLE t1;
End of 5.1 tests
mysql-test/r/gis.result
View file @ 21a60acb
......@@ -1014,4 +1014,12 @@ SET @a=0x00000000030000000100000000000000000000000000144000000000000014400000000
SET @a=POLYFROMWKB(@a);
SET @a=0x00000000030000000000000000000000000000000000144000000000000014400000000000001840000000000000184000000000000014400000000000001440;
SET @a=POLYFROMWKB(@a);
create table t1(a polygon NOT NULL)engine=myisam;
insert into t1 values (geomfromtext("point(0 1)"));
insert into t1 values (geomfromtext("point(1 0)"));
select * from (select polygon(t1.a) as p from t1 order by t1.a) d;
p
NULL
NULL
drop table t1;
End of 5.1 tests
mysql-test/r/mysqladmin.result
View file @ 21a60acb
......@@ -2,3 +2,11 @@ mysqld is alive
mysqladmin: unknown variable 'database=db1'
Warning: mysqladmin: unknown variable 'loose-database=db2'
mysqld is alive
#
# Bug#58221 : mysqladmin --sleep=x --count=x keeps looping
#
# Executing mysqladmin with --sleep=1 and --count=2.
# Done.
# Displaying the output :
mysqld is alive
mysqld is alive
mysql-test/r/mysqlbinlog_row_big.result
View file @ 21a60acb
......@@ -36,8 +36,8 @@ c1 LONGTEXT
#
# Insert some big rows.
#
256MB
INSERT INTO t1 VALUES (REPEAT('ManyMegaByteBlck', 16777216));
64MB
INSERT INTO t1 VALUES (REPEAT('ManyMegaByteBlck', 4194304));
affected rows: 1
32MB
INSERT INTO t1 VALUES (REPEAT('ManyMegaByteBlck', 2097152));
......@@ -53,7 +53,7 @@ affected rows: 1
# Do not display the column value itself, just its length.
#
SELECT LENGTH(c1) FROM t1;
LENGTH(c1) 268435456
LENGTH(c1) 67108864
LENGTH(c1) 33554432
LENGTH(c1) 4194304
LENGTH(c1) 524288
......@@ -69,7 +69,7 @@ info: Rows matched: 4 Changed: 4 Warnings: 0
# Do not display the column value itself, just its length.
#
SELECT LENGTH(c1) FROM t1;
LENGTH(c1) 536870912
LENGTH(c1) 134217728
LENGTH(c1) 1048576
LENGTH(c1) 67108864
LENGTH(c1) 8388608
......
mysql-test/r/mysqldump.result
View file @ 21a60acb
......@@ -14,7 +14,7 @@ INSERT INTO t1 VALUES (1), (2);
<mysqldump xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<database name="test">
<table_structure name="t1">
<field Field="a" Type="int(11)" Null="YES" Key="MUL" Extra="" />
<field Field="a" Type="int(11)" Null="YES" Key="MUL" Extra="" Comment="" />
<key Table="t1" Non_unique="1" Key_name="a" Seq_in_index="1" Column_name="a" Collation="A" Null="YES" Index_type="BTREE" Comment="" />
</table_structure>
<table_data name="t1">
......@@ -150,9 +150,9 @@ INSERT INTO t1 VALUES (1, "test", "tes"), (2, "TEST", "TES");
<mysqldump xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<database name="test">
<table_structure name="t1">
<field Field="a" Type="int(11)" Null="YES" Key="" Extra="" />
<field Field="b" Type="text" Null="YES" Key="" Extra="" />
<field Field="c" Type="varchar(3)" Null="YES" Key="" Extra="" />
<field Field="a" Type="int(11)" Null="YES" Key="" Extra="" Comment="" />
<field Field="b" Type="text" Null="YES" Key="" Extra="" Comment="" />
<field Field="c" Type="varchar(3)" Null="YES" Key="" Extra="" Comment="" />
</table_structure>
<table_data name="t1">
<row>
......@@ -178,7 +178,7 @@ INSERT INTO t1 VALUES ("1\""), ("\"2");
<mysqldump xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<database name="test">
<table_structure name="t1">
<field Field="a&quot;b&quot;" Type="char(2)" Null="YES" Key="" Extra="" />
<field Field="a&quot;b&quot;" Type="char(2)" Null="YES" Key="" Extra="" Comment="" />
</table_structure>
<table_data name="t1">
<row>
......@@ -1612,10 +1612,10 @@ CREATE TABLE `t2` (
<mysqldump xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<database name="mysqldump_test_db">
<table_structure name="t1">
<field Field="a" Type="int(11)" Null="YES" Key="" Extra="" />
<field Field="a" Type="int(11)" Null="YES" Key="" Extra="" Comment="" />
</table_structure>
<table_structure name="t2">
<field Field="a" Type="int(11)" Null="YES" Key="" Extra="" />
<field Field="a" Type="int(11)" Null="YES" Key="" Extra="" Comment="" />
</table_structure>
</database>
</mysqldump>
......@@ -1623,10 +1623,10 @@ CREATE TABLE `t2` (
<mysqldump xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<database name="mysqldump_test_db">
<table_structure name="t1">
<field Field="a" Type="int(11)" Null="YES" Key="" Extra="" />
<field Field="a" Type="int(11)" Null="YES" Key="" Extra="" Comment="" />
</table_structure>
<table_structure name="t2">
<field Field="a" Type="int(11)" Null="YES" Key="" Extra="" />
<field Field="a" Type="int(11)" Null="YES" Key="" Extra="" Comment="" />
</table_structure>
</database>
</mysqldump>
......@@ -3644,8 +3644,8 @@ INSERT INTO t1 VALUES(1,0xff00fef0);
<mysqldump xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<database name="test">
<table_structure name="t1">
<field Field="f1" Type="int(10)" Null="YES" Key="" Extra="" />
<field Field="data" Type="mediumblob" Null="YES" Key="" Extra="" />
<field Field="f1" Type="int(10)" Null="YES" Key="" Extra="" Comment="" />
<field Field="data" Type="mediumblob" Null="YES" Key="" Extra="" Comment="" />
</table_structure>
<table_data name="t1">
<row>
......@@ -4576,5 +4576,20 @@ LENGTH(a)
800
DROP TABLE t1, t2;
#
# Bug #13618 : mysqldump --xml ommit comment on table field
#
CREATE TABLE `comment_table` (i INT COMMENT 'FIELD COMMENT') COMMENT = 'TABLE COMMENT';
<?xml version="1.0"?>
<mysqldump xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<database name="test">
<table_structure name="comment_table">
<field Field="i" Type="int(11)" Null="YES" Key="" Extra="" Comment="FIELD COMMENT" />
</table_structure>
<table_data name="comment_table">
</table_data>
</database>
</mysqldump>
DROP TABLE `comment_table`;
#
# End of 5.1 tests
#
mysql-test/t/func_str.test
View file @ 21a60acb
......@@ -1369,4 +1369,15 @@ DROP TABLE t1;
SELECT '1' IN ('1', SUBSTRING(-9223372036854775809, 1));
SELECT CONVERT(('' IN (REVERSE(CAST(('') AS DECIMAL)), '')), CHAR(3));
--echo #
--echo # Bug#58165: "my_empty_string" gets modified and causes LOAD DATA to fail
--echo # and other crashes
--echo #
CREATE TABLE t1 ( a TEXT );
SELECT 'aaaaaaaaaaaaaa' INTO OUTFILE 'bug58165.txt';
SELECT insert( substring_index( 'a', 'a', 'b' ), 1, 0, 'x' );
LOAD DATA INFILE 'bug58165.txt' INTO TABLE t1;
SELECT * FROM t1;
DROP TABLE t1;
--echo End of 5.1 tests
mysql-test/t/gis.test
View file @ 21a60acb
......@@ -358,7 +358,7 @@ t1 where object_id=85998;
# Expected result is 36.3310176346905, but IA64 returns 36.3310176346904
# due to fused multiply-add instructions.
--replace_result 36.3310176346904 36.3310176346905
--replace_result 36.3310176346904 36.3310176346905 -114.87787186923326 -114.87787186923313 36.33101763469053 36.33101763469059 36.33101763469043 36.33101763469059
select object_id, geometrytype(geo), ISSIMPLE(GEO), ASTEXT(centroid(geo)) from
t1 where object_id=85984;
......@@ -744,4 +744,14 @@ SET @a=0x00000000030000000000000000000000000000000000144000000000000014400000000
SET @a=POLYFROMWKB(@a);
#
# Bug #57321 crashes and valgrind errors from spatial types
#
create table t1(a polygon NOT NULL)engine=myisam;
insert into t1 values (geomfromtext("point(0 1)"));
insert into t1 values (geomfromtext("point(1 0)"));
select * from (select polygon(t1.a) as p from t1 order by t1.a) d;
drop table t1;
--echo End of 5.1 tests
mysql-test/t/mysqladmin.test
View file @ 21a60acb
......@@ -33,3 +33,15 @@ EOF
--exec $MYSQLADMIN --defaults-file=$MYSQLTEST_VARDIR/tmp/bug10608.cnf -S $MASTER_MYSOCK -P $MASTER_MYPORT -u root --password= ping 2>&1
remove_file $MYSQLTEST_VARDIR/tmp/bug10608.cnf;
--echo #
--echo # Bug#58221 : mysqladmin --sleep=x --count=x keeps looping
--echo #
--echo # Executing mysqladmin with --sleep=1 and --count=2.
--exec $MYSQLADMIN -u root -S $MASTER_MYSOCK -P $MASTER_MYPORT --sleep=1 --count=2 ping > $MYSQLTEST_VARDIR/tmp/mysqladmin.tmp
--echo # Done.
--echo # Displaying the output :
--cat_file $MYSQLTEST_VARDIR/tmp/mysqladmin.tmp
--remove_file $MYSQLTEST_VARDIR/tmp/mysqladmin.tmp
mysql-test/t/mysqlbinlog_row_big.test
View file @ 21a60acb
......@@ -79,8 +79,8 @@ eval CREATE TABLE t1 (
--echo # Insert some big rows.
--echo #
--echo 256MB
INSERT INTO t1 VALUES (REPEAT('ManyMegaByteBlck', 16777216));
--echo 64MB
INSERT INTO t1 VALUES (REPEAT('ManyMegaByteBlck', 4194304));
--echo 32MB
INSERT INTO t1 VALUES (REPEAT('ManyMegaByteBlck', 2097152));
......
mysql-test/t/mysqldump.test
View file @ 21a60acb
......@@ -2164,6 +2164,15 @@ SELECT LENGTH(a) FROM t2;
DROP TABLE t1, t2;
###########################################################################
--echo #
--echo # Bug #13618 : mysqldump --xml ommit comment on table field
--echo #
CREATE TABLE `comment_table` (i INT COMMENT 'FIELD COMMENT') COMMENT = 'TABLE COMMENT';
--exec $MYSQL_DUMP --compact --skip-create --xml test
DROP TABLE `comment_table`;
--echo #
--echo # End of 5.1 tests
--echo #
......
sql/item_geofunc.h
View file @ 21a60acb
......@@ -177,6 +177,7 @@ public:
String *val_str(String *);
void fix_length_and_dec()
{
Item_geometry_func::fix_length_and_dec();
for (unsigned int i= 0; i < arg_count; ++i)
{
if (args[i]->fixed && args[i]->field_type() != MYSQL_TYPE_GEOMETRY)
......
sql/item_strfunc.cc
View file @ 21a60acb
......@@ -39,6 +39,9 @@ C_MODE_START
#include "../mysys/my_static.h" // For soundex_map
C_MODE_END
/**
@todo Remove this. It is not safe to use a shared String object.
*/
String my_empty_string("",default_charset_info);
......@@ -461,7 +464,7 @@ String *Item_func_des_encrypt::val_str(String *str)
if ((null_value= args[0]->null_value))
return 0; // ENCRYPT(NULL) == NULL
if ((res_length=res->length()) == 0)
return &my_empty_string;
return make_empty_result();
if (arg_count == 1)
{
......@@ -652,7 +655,7 @@ String *Item_func_concat_ws::val_str(String *str)
}
if (i == arg_count)
return &my_empty_string;
return make_empty_result();
for (i++; i < arg_count ; i++)
{
......@@ -803,7 +806,7 @@ String *Item_func_reverse::val_str(String *str)
return 0;
/* An empty string is a special case as the string pointer may be null */
if (!res->length())
return &my_empty_string;
return make_empty_result();
if (tmp_value.alloced_length() < res->length() &&
tmp_value.realloc(res->length()))
{
......@@ -1143,8 +1146,7 @@ String *Item_func_left::val_str(String *str)
/* if "unsigned_flag" is set, we have a *huge* positive number. */
if ((length <= 0) && (!args[1]->unsigned_flag))
return &my_empty_string;
return make_empty_result();
if ((res->length() <= (ulonglong) length) ||
(res->length() <= (char_pos= res->charpos((int) length))))
return res;
......@@ -1187,7 +1189,7 @@ String *Item_func_right::val_str(String *str)
/* if "unsigned_flag" is set, we have a *huge* positive number. */
if ((length <= 0) && (!args[1]->unsigned_flag))
return &my_empty_string; /* purecov: inspected */
return make_empty_result(); /* purecov: inspected */
if (res->length() <= (ulonglong) length)
return res; /* purecov: inspected */
......@@ -1226,7 +1228,7 @@ String *Item_func_substr::val_str(String *str)
/* Negative or zero length, will return empty string. */
if ((arg_count == 3) && (length <= 0) &&
(length == 0 || !args[2]->unsigned_flag))
return &my_empty_string;
return make_empty_result();
/* Assumes that the maximum length of a String is < INT_MAX32. */
/* Set here so that rest of code sees out-of-bound value as such. */
......@@ -1237,12 +1239,12 @@ String *Item_func_substr::val_str(String *str)
/* Assumes that the maximum length of a String is < INT_MAX32. */
if ((!args[1]->unsigned_flag && (start < INT_MIN32 || start > INT_MAX32)) ||
(args[1]->unsigned_flag && ((ulonglong) start > INT_MAX32)))
return &my_empty_string;
return make_empty_result();
start= ((start < 0) ? res->numchars() + start : start - 1);
start= res->charpos((int) start);
if ((start < 0) || ((uint) start + 1 > res->length()))
return &my_empty_string;
return make_empty_result();
length= res->charpos((int) length, (uint32) start);
tmp_length= res->length() - start;
......@@ -1305,7 +1307,7 @@ String *Item_func_substr_index::val_str(String *str)
null_value=0;
uint delimiter_length= delimiter->length();
if (!res->length() || !delimiter_length || !count)
return &my_empty_string; // Wrong parameters
return make_empty_result(); // Wrong parameters
res->set_charset(collation.collation);
......@@ -1654,7 +1656,7 @@ String *Item_func_password::val_str(String *str)
if ((null_value=args[0]->null_value))
return 0;
if (res->length() == 0)
return &my_empty_string;
return make_empty_result();
my_make_scrambled_password(tmp_value, res->ptr(), res->length());
str->set(tmp_value, SCRAMBLED_PASSWORD_CHAR_LENGTH, res->charset());
return str;
......@@ -1678,7 +1680,7 @@ String *Item_func_old_password::val_str(String *str)
if ((null_value=args[0]->null_value))
return 0;
if (res->length() == 0)
return &my_empty_string;
return make_empty_result();
my_make_scrambled_password_323(tmp_value, res->ptr(), res->length());
str->set(tmp_value, SCRAMBLED_PASSWORD_CHAR_LENGTH_323, res->charset());
return str;
......@@ -1706,8 +1708,7 @@ String *Item_func_encrypt::val_str(String *str)
if ((null_value=args[0]->null_value))
return 0;
if (res->length() == 0)
return &my_empty_string;
return make_empty_result();
if (arg_count == 1)
{ // generate random salt
time_t timestamp=current_thd->query_start();
......@@ -1967,7 +1968,7 @@ String *Item_func_soundex::val_str(String *str)
for ( ; ; ) /* Skip pre-space */
{
if ((rc= cs->cset->mb_wc(cs, &wc, (uchar*) from, (uchar*) end)) <= 0)
return &my_empty_string; /* EOL or invalid byte sequence */
return make_empty_result(); /* EOL or invalid byte sequence */
if (rc == 1 && cs->ctype)
{
......@@ -1992,7 +1993,7 @@ String *Item_func_soundex::val_str(String *str)
{
/* Extra safety - should not really happen */
DBUG_ASSERT(false);
return &my_empty_string;
return make_empty_result();
}
to+= rc;
break;
......@@ -2289,7 +2290,7 @@ String *Item_func_make_set::val_str(String *str)
else
{
if (tmp_str.copy(*res)) // Don't use 'str'
return &my_empty_string;
return make_empty_result();
result= &tmp_str;
}
}
......@@ -2299,11 +2300,11 @@ String *Item_func_make_set::val_str(String *str)
{ // Copy data to tmp_str
if (tmp_str.alloc(result->length()+res->length()+1) ||
tmp_str.copy(*result))
return &my_empty_string;
return make_empty_result();
result= &tmp_str;
}
if (tmp_str.append(STRING_WITH_LEN(","), &my_charset_bin) || tmp_str.append(*res))
return &my_empty_string;
return make_empty_result();
}
}
}
......@@ -2442,7 +2443,7 @@ String *Item_func_repeat::val_str(String *str)
null_value= 0;
if (count <= 0 && (count == 0 || !args[1]->unsigned_flag))
return &my_empty_string;
return make_empty_result();
/* Assumes that the maximum length of a String is < INT_MAX32. */
/* Bounds check on count: If this is triggered, we will error. */
......@@ -2750,7 +2751,7 @@ String *Item_func_conv::val_str(String *str)
ptr= longlong2str(dec, ans, to_base);
if (str->copy(ans, (uint32) (ptr-ans), default_charset()))
return &my_empty_string;
return make_empty_result();
return str;
}
......@@ -2917,7 +2918,7 @@ String *Item_func_hex::val_str(String *str)
return 0;
ptr= longlong2str(dec,ans,16);
if (str->copy(ans,(uint32) (ptr-ans),default_charset()))
return &my_empty_string; // End of memory
return make_empty_result(); // End of memory
return str;
}
......
sql/item_strfunc.h
View file @ 21a60acb
......@@ -22,6 +22,16 @@
class Item_str_func :public Item_func
{
protected:
/**
Sets the result value of the function an empty string, using the current
character set. No memory is allocated.
@retval A pointer to the str_value member.
*/
String *make_empty_result() {
str_value.set("", 0, collation.collation);
return &str_value;
}
public:
Item_str_func() :Item_func() { decimals=NOT_FIXED_DEC; }
Item_str_func(Item *a) :Item_func(a) {decimals=NOT_FIXED_DEC; }
......
sql/sql_string.cc
View file @ 21a60acb
......@@ -58,11 +58,33 @@ bool String::real_alloc(uint32 arg_length)
}
/*
** Check that string is big enough. Set string[alloc_length] to 0
** (for C functions)
*/
/**
Allocates a new buffer on the heap for this String.
- If the String's internal buffer is privately owned and heap allocated,
one of the following is performed.
- If the requested length is greater than what fits in the buffer, a new
buffer is allocated, data moved and the old buffer freed.
- If the requested length is less or equal to what fits in the buffer, a
null character is inserted at the appropriate position.
- If the String does not keep a private buffer on the heap, such a buffer
will be allocated and the string copied accoring to its length, as found
in String::length().
For C compatibility, the new string buffer is null terminated.
@param alloc_length The requested string size in characters, excluding any
null terminator.
@retval false Either the copy operation is complete or, if the size of the
new buffer is smaller than the currently allocated buffer (if one exists),
no allocation occured.
@retval true An error occured when attempting to allocate memory.
*/
bool String::realloc(uint32 alloc_length)
{
uint32 len=ALIGN_SIZE(alloc_length+1);
......@@ -196,6 +218,17 @@ bool String::copy()
return FALSE;
}
/**
Copies the internal buffer from str. If this String has a private heap
allocated buffer where new data does not fit, a new buffer is allocated
before copying and the old buffer freed. Character set information is also
copied.
@param str The string whose internal buffer is to be copied.
@retval false Success.
@retval true Memory allocation failed.
*/
bool String::copy(const String &str)
{
if (alloc(str.str_length))
......
sql/sql_string.h
View file @ 21a60acb
......@@ -136,6 +136,16 @@ public:
Alloced_length=0;
str_charset=str.str_charset;
}
/**
Points the internal buffer to the supplied one. The old buffer is freed.
@param str Pointer to the new buffer.
@param arg_length Length of the new buffer in characters, excluding any
null character.
@param cs Character set to use for interpreting string data.
@note The new buffer will not be null terminated.
*/
inline void set(char *str,uint32 arg_length, CHARSET_INFO *cs)
{
free();
......
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