MDEV-9711 NO PAD collations

Based on the patch from Daniil Medvedev (a Google Summer of Code task)

2 files changed, 86 insertions, 0 deletions

diff --git a/mysql-test/include/ctype_pad.inc b/mysql-test/include/ctype_pad.inc
new file mode 100644
index 00000000000..4cefc575cdd
--- /dev/null
+++ b/mysql-test/include/ctype_pad.inc
@@ -0,0 +1,79 @@
+--echo #
+--echo # Start of ctype_pad.inc
+--echo #
+
+--echo #
+--echo # Unique indexes
+--echo #
+
+eval CREATE TABLE t1 (a VARCHAR(10) PRIMARY KEY) COLLATE $coll;
+SHOW CREATE TABLE t1;
+INSERT INTO t1 VALUES ('abc'),('abc  '),(' a'),(' a '),('a   ');
+SELECT HEX(a), a FROM t1 ORDER BY a;
+SELECT HEX(a), a FROM t1 IGNORE INDEX(PRIMARY) ORDER BY a;
+SELECT HEX(a), a FROM t1 IGNORE INDEX(PRIMARY) ORDER BY a DESC;
+
+--echo #
+--echo # UNION
+--echo #
+
+eval CREATE TABLE t2 (a VARCHAR(10)) COLLATE $coll;
+INSERT INTO t2 VALUES ('abc '),('abc  '),(' a'),('a ');
+SELECT HEX(a),a FROM (SELECT * FROM t1 UNION SELECT * FROM t2 ORDER BY a) td;
+DROP TABLE t1;
+DROP TABLE t2;
+
+--echo #
+--echo # DISTINCT, COUNT, MAX
+--echo #
+
+eval CREATE TABLE t1 (a VARCHAR(10)) COLLATE $coll;
+INSERT INTO t1 VALUES ('a'),('a  '),(' a'),(' a '),('a   ');
+SELECT HEX(a), a FROM (SELECT DISTINCT a FROM t1 ORDER BY a) td;
+SELECT COUNT(DISTINCT a) FROM t1 ORDER BY a;
+SELECT HEX(MAX(a)), MAX(a) FROM t1;
+
+--echo #
+--echo # GROUP BY
+--echo #
+
+eval CREATE TABLE t2 (a VARCHAR(10), b int, c varchar(10)) COLLATE $coll;
+INSERT t2 values('ab', 12, 'cd'), ('ab', 2, 'ed'), ('aa', 20, 'er'), ('aa  ', 0, 'er ');
+SELECT HEX(a), cnt FROM (SELECT a, COUNT(a) AS cnt FROM t2 GROUP BY a ORDER BY a) AS td;
+DROP TABLE t2;
+
+--echo #
+--echo # Weights
+--echo #
+
+SELECT HEX(WEIGHT_STRING(a AS CHAR(10))) FROM t1;
+DROP TABLE t1;
+
+--echo #
+--echo # IF, CASE, LEAST
+--echo #
+
+eval SELECT IF('abc' COLLATE $coll = 'abc ', 'pad', 'nopad');
+eval SELECT CASE 'abc' COLLATE $coll WHEN 'abc ' THEN 'pad' ELSE 'nopad' END;
+eval SELECT CASE WHEN 'abc' COLLATE $coll = 'abc ' THEN 'pad' ELSE 'nopad' END;
+eval SELECT HEX(LEAST('abc ' COLLATE $coll, 'abc  '));
+eval SELECT HEX(GREATEST('abc ' COLLATE $coll, 'abc  '));
+
+--echo #
+--echo # Collation mix
+--echo #
+
+eval CREATE TABLE t1 (a VARCHAR(10)) COLLATE $coll_pad;
+INSERT INTO t1 VALUES ('a'),('a ');
+SELECT COUNT(*) FROM t1 WHERE a='a';
+eval SELECT COUNT(*) FROM t1 WHERE a='a' COLLATE $coll_pad;
+eval SELECT COUNT(*) FROM t1 WHERE a='a' COLLATE $coll;
+eval ALTER TABLE t1 MODIFY a VARCHAR(10) COLLATE $coll;
+SELECT COUNT(*) FROM t1 WHERE a='a';
+eval SELECT COUNT(*) FROM t1 WHERE a='a' COLLATE $coll_pad;
+eval SELECT COUNT(*) FROM t1 WHERE a='a' COLLATE $coll;
+DROP TABLE t1;
+
+--echo #
+--echo # End of ctype_pad.inc
+--echo #
diff --git a/mysql-test/include/ctype_pad_all_engines.inc b/mysql-test/include/ctype_pad_all_engines.inc
new file mode 100644
index 00000000000..29371676a19
--- /dev/null
+++ b/mysql-test/include/ctype_pad_all_engines.inc
@@ -0,0 +1,7 @@
+SET STORAGE_ENGINE=MyISAM;
+--source include/ctype_pad.inc
+
+SET STORAGE_ENGINE=HEAP;
+--source include/ctype_pad.inc
+
+SET STORAGE_ENGINE=Default;