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#ifndef DRIZZLED_NESTED_JOIN_H
#define DRIZZLED_NESTED_JOIN_H
struct nested_join_st
{
List<TableList> join_list; /* list of elements in the nested join */
table_map used_tables; /* bitmap of tables in the nested join */
table_map not_null_tables; /* tables that rejects nulls */
struct st_join_table *first_nested;/* the first nested table in the plan */
/*
Used to count tables in the nested join in 2 isolated places:
1. In make_outerjoin_info().
2. check_interleaving_with_nj/restore_prev_nj_state (these are called
by the join optimizer.
Before each use the counters are zeroed by reset_nj_counters.
*/
uint counter_;
nested_join_map nj_map; /* Bit used to identify this nested join*/
/*
(Valid only for semi-join nests) Bitmap of tables outside the semi-join
that are used within the semi-join's ON condition.
*/
table_map sj_depends_on;
/* Outer non-trivially correlated tables */
table_map sj_corr_tables;
List<Item> sj_outer_expr_list;
};
#endif /* DRIZZLED_NESTED_JOIN_H */
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