Added tmp_disk_table_size to limit size of Aria temp tables in tmpdir

- Added variable tmp_disk_table_size
- Added variable tmp_memory_table_size as an alias for tmp_table_size
- Changed internal variable tmp_table_size to tmp_memory_table_size
- create_info.data_file_length is now set with tmp_disk_table_size
- Fixed that Aria doesn't reset max_data_file_length for internal tables
- Added status flag if table is full so that we can detect this on next insert.
  This ensures that the table is always 'correct', but we get the error one
  row after the row that grow the table too big.
- Removed some mutex lock for internal temporary tables

1 files changed, 2 insertions, 1 deletions

diff --git a/sql/sql_class.h b/sql/sql_class.h
index 0a1be8c13c8..8052e28fbb4 100644
--- a/sql/sql_class.h
+++ b/sql/sql_class.h
@@ -536,7 +536,8 @@ typedef struct system_variables
   uint dynamic_variables_size;    /* how many bytes are in use */
   
   ulonglong max_heap_table_size;
-  ulonglong tmp_table_size;
+  ulonglong tmp_memory_table_size;
+  ulonglong tmp_disk_table_size;
   ulonglong long_query_time;
   ulonglong max_statement_time;
   ulonglong optimizer_switch;