branches/zip:

Add auxiliary function lock_rec_get_index() to retrieve the index on
which the lock is.

Approved by:	Heikki

include/lock0lock.h

@@ -732,6 +732,15 @@ lock_get_table_name(
 				/* out: name of the table */
 	const lock_t*	lock);	/* in: lock */
 
+/***********************************************************************
+For a record lock, gets the index on which the lock is. */
+
+const dict_index_t*
+lock_rec_get_index(
+/*===============*/
+				/* out: index */
+	const lock_t*	lock);	/* in: lock */
+
 /***********************************************************************
 For a record lock, gets the name of the index on which the lock is.
 The string should not be free()'d or modified. */

lock/lock0lock.c

@@ -5484,6 +5484,20 @@ lock_get_table_name(
 	return(table->name);
 }
 
+/***********************************************************************
+For a record lock, gets the index on which the lock is. */
+
+const dict_index_t*
+lock_rec_get_index(
+/*===============*/
+				/* out: index */
+	const lock_t*	lock)	/* in: lock */
+{
+	ut_a(lock_get_type_low(lock) == LOCK_REC);
+
+	return(lock->index);
+}
+
 /***********************************************************************
 For a record lock, gets the name of the index on which the lock is.
 The string should not be free()'d or modified. */