B4BY.588

: / usr / share / mysql-test / t /
Filename : func_weight_string.test
back
--disable_warnings
drop table if exists t1;
--enable_warnings

set names latin1;

#
# If it's BLOB or BINARY or VARBINARY, then output = input.
#
select hex(weight_string(0x010203));

#
# "AS CHAR ( int )" causes padding on the right. The pad
# character is always space, that is, 0x20 or 0x0020.
# The padding occurs before the conversion to a weight.
# The value of "int" is the number of characters, not the number of bytes.
#
select hex(weight_string('aa' as char(3)));

#
# The minimum value of 'int' is 1.
#
--error 1064
select hex(weight_string('a' as char(-1)));
--error 1064
select hex(weight_string('a' as char(0)));
select hex(weight_string('a' as char(1)));

#
# If 'int' is smaller than the length of 'string',
# truncation will occur with no warning.
#
select hex(weight_string('ab' as char(1)));

#
# If "AS CHAR ( int )" is omitted, there is no padding and no truncation.
#
select hex(weight_string('ab'));

#
# "AS BINARY ( int )" is like CHAR(int) but causes padding of 0x00
# so one doesn't have to use "CAST(string AS BINARY(int))".
#
select hex(weight_string('aa' as binary(3)));
select hex(weight_string(cast('aa' as binary(3))));

#
# If and only if one specifies "LEVEL numeric-list" (not "range"),
# one may follow any "number" with [ASC|DESC][REVERSE]
#
--error 1064
select hex(weight_string('ab' level 1-1 ASC));
--error 1064
select hex(weight_string('ab' level 1-1 DESC));
--error 1064
select hex(weight_string('ab' level 1-1 REVERSE));

#
# If one says "DESC", then the weights come out NOTed
# or negated for that level. 
# If one says "REVERSE", then the weights come out in
# reverse order for that level, that is, starting with
# the last character and ending with the first character.
#
select hex(weight_string('ab' level 1 ASC));
select hex(weight_string('ab' level 1 DESC));
select hex(weight_string('ab' level 1 REVERSE));
select hex(weight_string('ab' level 1 DESC REVERSE));

#
# If the result length is less than or equal to the
# maximum possible length for the VARBINARY data type,
# then the result data type is VARBINARY. Otherwise
# the result data type is BLOB.
#
create table t1 select weight_string('test') as w;
show create table t1;
drop table t1;
create table t1 select weight_string(repeat('t',66000)) as w;
show create table t1;
drop table t1;

#
# If input is NULL, then output is NULL.
#
select weight_string(NULL);

#    
# WEIGHT_STRING and REVERSE will not be a new reserved word.
#
select 1 as weight_string, 2 as reverse;

#
# Check that collation derivation is copied from the argument
#
select coercibility(weight_string('test'));
select coercibility(weight_string('test' collate latin1_swedish_ci));

#
# Bug#33663 Character sets: weight_string function,
# varchar column, wrong result
#
create table t1 (s1 varchar(5));
insert into t1 values ('a'),(null);
select hex(weight_string(s1)) from t1 order by s1;
drop table t1;

--echo #
--echo # BUG#11898467 - SERVER CRASHES ON SELECT HEX(WEIGHT_STRING(STR AS [CHAR|BINARY](N))) IF N IS BIG 
--echo #
SELECT HEX(WEIGHT_STRING('ab' AS CHAR(1000000000000000000))); 
SELECT HEX(WEIGHT_STRING('ab' AS BINARY(1000000000000000000)));