MDEV-13628: ORed condition in pushed index condition is not removed from the WHERE

So to push index condition for each join tab we have calculate the index condition that can be pushed and then
remove this index condition from the original condition. This is done through the function make_cond_remainder.
The problem is the function make_cond_remainder does not remove index condition when there is an OR operator.

Fixed this by making the function make_cond_remainder to keep in mind of the OR operator.
Also updated results for multiple test files which were incorrectly updated by the commit e0c1b3f24246d22e6785315f9a8448bd9a590422

code which was supposed to remove the condition present in the index
condition was not getting executed when the condition had OR operator, with AND the pushed
index condition was getting removed from where.

This problem affects all versions starting from 5.5 but this is a performance improvement, so fixing it in 10.4

1 files changed, 1 insertions, 1 deletions

diff --git a/mysql-test/main/select_pkeycache.result b/mysql-test/main/select_pkeycache.result
index a527459657a..804830c48df 100644
--- a/mysql-test/main/select_pkeycache.result
+++ b/mysql-test/main/select_pkeycache.result
@@ -3422,7 +3422,7 @@ SELECT t2.sku, t2.sppr, t2.name, t1.sku, t1.pr
 FROM t2, t1 WHERE t2.sku=20 AND (t2.sku=t1.sku OR t2.sppr=t1.sku);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	t2	const	PRIMARY	PRIMARY	4	const	1	
-1	SIMPLE	t1	range	PRIMARY	PRIMARY	4	NULL	2	Using index condition; Using where
+1	SIMPLE	t1	range	PRIMARY	PRIMARY	4	NULL	2	Using index condition
 DROP TABLE t1,t2;
 SET SQL_MODE='NO_UNSIGNED_SUBTRACTION';
 CREATE TABLE t1 (i TINYINT UNSIGNED NOT NULL);