MySQL 5.6.14 Source Code Document
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weight_string.inc
1 select @@collation_connection;
2 select hex(weight_string('a'));
3 select hex(weight_string('A'));
4 select hex(weight_string('abc'));
5 select hex(weight_string('abc' as char(2)));
6 select hex(weight_string('abc' as char(3)));
7 select hex(weight_string('abc' as char(5)));
8 
9 # Read 2 characters from the source string (the last character is not used).
10 select hex(weight_string('abc', 1, 2, 0xC0));
11 select hex(weight_string('abc', 2, 2, 0xC0));
12 select hex(weight_string('abc', 3, 2, 0xC0));
13 select hex(weight_string('abc', 4, 2, 0xC0));
14 select hex(weight_string('abc', 5, 2, 0xC0));
15 select hex(weight_string('abc',25, 2, 0xC0));
16 
17 # Read 3 characters from the source string (the entire string is used).
18 select hex(weight_string('abc', 1, 3, 0xC0));
19 select hex(weight_string('abc', 2, 3, 0xC0));
20 select hex(weight_string('abc', 3, 3, 0xC0));
21 select hex(weight_string('abc', 4, 3, 0xC0));
22 select hex(weight_string('abc', 5, 3, 0xC0));
23 select hex(weight_string('abc',25, 3, 0xC0));
24 
25 # Read 4 characters from the source string (extra space is added)
26 select hex(weight_string('abc', 1, 4, 0xC0));
27 select hex(weight_string('abc', 2, 4, 0xC0));
28 select hex(weight_string('abc', 3, 4, 0xC0));
29 select hex(weight_string('abc', 4, 4, 0xC0));
30 select hex(weight_string('abc', 5, 4, 0xC0));
31 select hex(weight_string('abc',25, 4, 0xC0));