Bug#49477: Assertion `0' failed in ha_partition.cc:5530

with temporary table and partitions

It was possible to create temporary partitioned tables
via create table ... like ... (which is not allowed with
create temporary table). This lead to a new HA_EXTRA flag
(HA_EXTRA_MMAP) was sent to the partitioning handler,
which was caught on an assert in debug builds.

Solution was to check for partitioned tables when
doing create table ... like ... and disallow it.

mysql-test/r/partition_error.result:
  Bug#49477: Assertion `0' failed in ha_partition.cc:5530
  with temporary table and partitions
  
  Added result
mysql-test/t/partition_error.test:
  Bug#49477: Assertion `0' failed in ha_partition.cc:5530
  with temporary table and partitions
  
  Added test
sql/sql_table.cc:
  Bug#49477: Assertion `0' failed in ha_partition.cc:5530
  with temporary table and partitions
  
  Added check to prevent creation of partitioned temporary
  tables.
  
  Only copy .par file for partitioned tables.

1 files changed, 13 insertions, 7 deletions

diff --git a/sql/sql_table.cc b/sql/sql_table.cc
index 869ae42c98c..6e0daefb7c1 100644
--- a/sql/sql_table.cc
+++ b/sql/sql_table.cc
@@ -5257,6 +5257,11 @@ bool mysql_create_like_table(THD* thd, TABLE_LIST* table, TABLE_LIST* src_table,
   */
   if (create_info->options & HA_LEX_CREATE_TMP_TABLE)
   {
+    if (src_table->table->file->ht == partition_hton)
+    {
+      my_error(ER_PARTITION_NO_TEMPORARY, MYF(0));
+      goto err;
+    }
     if (find_temporary_table(thd, db, table_name))
       goto table_exists;
     dst_path_length= build_tmptable_filename(thd, dst_path, sizeof(dst_path));
@@ -5321,14 +5326,15 @@ bool mysql_create_like_table(THD* thd, TABLE_LIST* table, TABLE_LIST* src_table,
   /*
     For partitioned tables we need to copy the .par file as well since
     it is used in open_table_def to even be able to create a new handler.
-    There is no way to find out here if the original table is a
-    partitioned table so we copy the file and ignore any errors.
   */
-  fn_format(tmp_path, dst_path, reg_ext, ".par", MYF(MY_REPLACE_EXT));
-  strmov(dst_path, tmp_path);
-  fn_format(tmp_path, src_path, reg_ext, ".par", MYF(MY_REPLACE_EXT));
-  strmov(src_path, tmp_path);
-  my_copy(src_path, dst_path, MYF(MY_DONT_OVERWRITE_FILE));
+  if (src_table->table->file->ht == partition_hton)
+  {
+    fn_format(tmp_path, dst_path, reg_ext, ".par", MYF(MY_REPLACE_EXT));
+    strmov(dst_path, tmp_path);
+    fn_format(tmp_path, src_path, reg_ext, ".par", MYF(MY_REPLACE_EXT));
+    strmov(src_path, tmp_path);
+    my_copy(src_path, dst_path, MYF(MY_DONT_OVERWRITE_FILE));
+  }
 #endif
 
   DBUG_EXECUTE_IF("sleep_create_like_before_ha_create", my_sleep(6000000););