support optimize_filters_for_hits (#42)

librocksdb_sys/crocksdb/c.cc

@@ -1758,6 +1758,11 @@ void crocksdb_options_set_prefix_extractor(
   opt->rep.prefix_extractor.reset(prefix_extractor);
 }
 
+void crocksdb_options_set_optimize_filters_for_hits(
+    crocksdb_options_t* opt, unsigned char v) {
+  opt->rep.optimize_filters_for_hits = v;
+}
+
 void crocksdb_options_set_memtable_insert_with_hint_prefix_extractor(
     crocksdb_options_t* opt, crocksdb_slicetransform_t* prefix_extractor) {
   opt->rep.memtable_insert_with_hint_prefix_extractor.reset(prefix_extractor);

librocksdb_sys/crocksdb/rocksdb/c.h

@@ -628,6 +628,8 @@ extern C_ROCKSDB_LIBRARY_API void crocksdb_options_set_target_file_size_multipli
     crocksdb_options_t*, int);
 extern C_ROCKSDB_LIBRARY_API void crocksdb_options_set_max_bytes_for_level_base(
     crocksdb_options_t*, uint64_t);
+extern C_ROCKSDB_LIBRARY_API void crocksdb_options_set_optimize_filters_for_hits(
+    crocksdb_options_t*, unsigned char);
 extern C_ROCKSDB_LIBRARY_API void
 crocksdb_options_set_level_compaction_dynamic_level_bytes(crocksdb_options_t*,
                                                          unsigned char);

librocksdb_sys/src/lib.rs

@@ -284,6 +284,7 @@ extern "C" {
     pub fn crocksdb_options_set_wal_size_limit_mb(options: *mut DBOptions, limit: u64);
     pub fn crocksdb_options_set_prefix_extractor(options: *mut DBOptions,
                                                  prefix_extractor: *mut DBSliceTransform);
+    pub fn crocksdb_options_set_optimize_filters_for_hits(options: *mut DBOptions, v: bool);
     pub fn crocksdb_options_set_memtable_insert_with_hint_prefix_extractor(options: *mut DBOptions,
                                                  prefix_extractor: *mut DBSliceTransform);
     pub fn crocksdb_options_set_memtable_prefix_bloom_size_ratio(options: *mut DBOptions,

src/rocksdb_options.rs

@@ -732,6 +732,12 @@ impl Options {
         }
     }
 
+    pub fn set_optimize_filters_for_hits(&mut self, v: bool) {
+        unsafe {
+            crocksdb_ffi::crocksdb_options_set_optimize_filters_for_hits(self.inner, v);
+        }
+    }
+
     pub fn set_memtable_insert_hint_prefix_extractor<S>(&mut self,
                                                         name: S,
                                                         transform: Box<SliceTransform>)

tests/test_rocksdb_options.rs

@@ -212,6 +212,15 @@ fn test_set_max_subcompactions() {
     DB::open(opts, path.path().to_str().unwrap()).unwrap();
 }
 
+#[test]
+fn test_set_optimize_filters_for_hits() {
+    let path = TempDir::new("_rust_rocksdb_optimize_filters_for_hits").expect("");
+    let mut opts = Options::new();
+    opts.create_if_missing(true);
+    opts.set_optimize_filters_for_hits(true);
+    DB::open(opts, path.path().to_str().unwrap()).unwrap();
+}
+
 #[test]
 fn test_get_block_cache_usage() {
     let path = TempDir::new("_rust_rocksdb_set_cache_and_index").expect("");