Bug #28488: Incorrect information in file: './test/t1_test#.frm'

While executing ALTER TABLE ... PARTITION the server uses 
a temporary "shadow" table to create the updated table.
This shadow table then gets renamed as the original table.
The shadow table was not prefixed with the special prefix that
marks temporary tables so it was picked up by SHOW TABLE STATUS.
Fixed by isolating the code to create the shadow table name in a
separate function and prefixing the shadow table name with the
special prefix to exclude it from the list of user tables.
See bug 18775 and WL1324 for details.


mysql-test/r/partition.result:
  Bug #28488: test case
mysql-test/t/partition.test:
  Bug #28488: test case
sql/mysql_priv.h:
  Bug #28488: prefix shadow file with the temp prefix
sql/sql_partition.cc:
  Bug #28488: prefix shadow file with the temp prefix
sql/sql_table.cc:
  Bug #28488: prefix shadow file with the temp prefix

1 files changed, 17 insertions, 0 deletions

diff --git a/mysql-test/t/partition.test b/mysql-test/t/partition.test
index 68c13c0792a..186cf1d3e8a 100644
--- a/mysql-test/t/partition.test
+++ b/mysql-test/t/partition.test
@@ -1448,4 +1448,21 @@ drop table t1;
 create table t1 (s1 bigint) partition by list (s1) (partition p1 values in (-9223372036854775808));
 drop table t1;
 
+#
+# Bug #28488: Incorrect information in file: './test/t1_test#.frm'
+#
+
+CREATE TABLE t1(a INT NOT NULL, b TINYBLOB, KEY(a))
+  PARTITION BY RANGE(a) ( PARTITION p0 VALUES LESS THAN (32));
+INSERT INTO t1 VALUES (1, REPEAT('a', 10));
+INSERT INTO t1 SELECT a + 1, b FROM t1;
+INSERT INTO t1 SELECT a + 2, b FROM t1;
+INSERT INTO t1 SELECT a + 4, b FROM t1;
+INSERT INTO t1 SELECT a + 8, b FROM t1;
+
+ALTER TABLE t1 ADD PARTITION (PARTITION p1 VALUES LESS THAN (64));
+ALTER TABLE t1 DROP PARTITION p1;
+
+DROP TABLE t1;
+
 --echo End of 5.1 tests