Fixed compiler warnings detected by option -Wshadow and -Wunused:

- Removed not used variables and functions
- Added #ifdef around code that is not used
- Renamed variables and functions to avoid conflicts
- Removed some not used arguments

Fixed some class/struct warnings in ndb
Added define IS_LONGDATA() to simplify code in libmysql.c

I did run gcov on the changes and added 'purecov' comments on almost all lines that was not just variable name changes

1 files changed, 1 insertions, 1 deletions

diff --git a/sql/item_row.h b/sql/item_row.h
index d6dd4371372..f3133732bb4 100644
--- a/sql/item_row.h
+++ b/sql/item_row.h
@@ -72,7 +72,7 @@ public:
   Item *transform(Item_transformer transformer, byte *arg);
 
   uint cols() { return arg_count; }
-  Item* el(uint i) { return items[i]; }
+  Item* element_index(uint i) { return items[i]; }
   Item** addr(uint i) { return items + i; }
   bool check_cols(uint c);
   bool null_inside() { return with_null; };