diff options
Diffstat (limited to 'sql/rowid_filter.h')
| -rw-r--r-- | sql/rowid_filter.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/sql/rowid_filter.h b/sql/rowid_filter.h index 467b6884ca6..b76b8b1e635 100644 --- a/sql/rowid_filter.h +++ b/sql/rowid_filter.h @@ -192,6 +192,9 @@ public: */ virtual bool check(void *ctxt, char *elem) = 0; + /* True if the container does not contain any element */ + virtual bool is_empty() = 0; + virtual ~Rowid_filter_container() {} }; @@ -231,6 +234,8 @@ public: virtual ~Rowid_filter() {} + bool is_empty() { return container->is_empty(); } + Rowid_filter_container *get_container() { return container; } void set_tracker(Rowid_filter_tracker *track_arg) { tracker= track_arg; } @@ -268,6 +273,8 @@ public: bool check(char *elem) { + if (container->is_empty()) + return false; bool was_checked= container->check(table, elem); tracker->increment_checked_elements_count(was_checked); return was_checked; @@ -339,6 +346,8 @@ public: my_qsort2(array->front(), array->elements()/elem_size, elem_size, (qsort2_cmp) cmp, cmp_arg); } + + bool is_empty() { return elements() == 0; } }; @@ -368,6 +377,8 @@ public: bool add(void *ctxt, char *elem) { return refpos_container.add(elem); } bool check(void *ctxt, char *elem); + + bool is_empty() { return refpos_container.is_empty(); } }; /** |