database/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2025-08-01 03:47:19 +03:00
Code Activity

BUG#18233 - Memory tables INDEX USING HASH (a,b) returns 1 row on

Browse Source 
SELECT WHERE a= AND b=

Selecting data from memory table with varchar column and hash index over it
returns only first row matched.

Problem was that key length calculation for varchar columns didn't include
number of bytes to store length.

Fixed key length for varchar fields to include number of bytes to store length.


heap/hp_create.c:
  Fixed key length for varchar fields to include number of bytes to store length.
mysql-test/r/heap.result:
  Testcase for BUG#18233.
mysql-test/t/heap.test:
  Testcase for BUG#18233.
This commit is contained in:
unknown
2006-05-10 21:50:04 +05:00
parent 8052fafd31
commit 2eeab0b0d8
3 changed files with 27 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

13
mysql-test/r/heap.result
View File

@ -718,3 +718,16 @@ Name Engine Version Row_format Rows Avg_row_length Data_length Max_data_length I
t1 MEMORY 10 Fixed 0 11 0 # 0 0 NULL NULL NULL NULL latin1_swedish_ci NULL
t2 MEMORY 10 Fixed 0 12 0 # 0 0 NULL NULL NULL NULL latin1_swedish_ci NULL
drop table t1, t2;
CREATE TABLE t1(a VARCHAR(1), b VARCHAR(2), c VARCHAR(256),
KEY(a), KEY(b), KEY(c)) ENGINE=MEMORY;
INSERT INTO t1 VALUES('a','aa',REPEAT('a', 256)),('a','aa',REPEAT('a',256));
SELECT COUNT(*) FROM t1 WHERE a='a';
COUNT(*)
2
SELECT COUNT(*) FROM t1 WHERE b='aa';
COUNT(*)
2
SELECT COUNT(*) FROM t1 WHERE c=REPEAT('a',256);
COUNT(*)
2
DROP TABLE t1;