Create 'main' test directory and move 't' and 'r' there

mysql-test/main/partition_open_files_limit.test

@@ -0,0 +1,26 @@
+--source include/have_partition.inc
+
+--disable_warnings
+DROP TABLE IF EXISTS `t1`;
+--enable_warnings
+
+# On some platforms the lowest possible open_files_limit is too high...
+let $max_open_files_limit= `SELECT @@open_files_limit > 511`;
+if ($max_open_files_limit)
+{
+  skip Need open_files_limit to be lower than 512;
+}
+
+#
+--echo # Bug#46922: crash when adding partitions and open_files_limit is reached
+#
+CREATE TABLE t1 (a INT PRIMARY KEY) 
+ENGINE=MyISAM PARTITION BY KEY () PARTITIONS 1;
+INSERT INTO t1 VALUES (1), (2), (3), (4), (5), (6), (7), (8), (9), (10), (11);
+--echo # if the bug exists, then crash will happen here
+--replace_regex /file '.*'/file '<partition file>'/
+--error 23
+ALTER TABLE t1 ADD PARTITION PARTITIONS 511;
+--sorted_result
+SELECT * FROM t1;
+DROP TABLE t1;