Add support for up to VARCHAR (size up to 65535)

Renamed HA_VAR_LENGTH to HA_VAR_LENGTH_PART
Renamed in all files FIELD_TYPE_STRING and FIELD_TYPE_VAR_STRING to MYSQL_TYPE_STRING and MYSQL_TYPE_VAR_STRING to make it easy to catch all possible errors
Added support for VARCHAR KEYS to heap
Removed support for ISAM
Now only long VARCHAR columns are changed to TEXT on demand (not CHAR)
Internal temporary files can now use fixed length tables if the used VARCHAR columns are short

1 files changed, 1 insertions, 0 deletions

diff --git a/sql/structs.h b/sql/structs.h
index cc053e2e2fd..1195948bbf2 100644
--- a/sql/structs.h
+++ b/sql/structs.h
@@ -93,6 +93,7 @@ typedef struct st_key {
   union {
     int  bdb_return_if_eq;
   } handler;
+  struct st_table *table;
 } KEY;