[C-API] added "rocksdb_options_set_plain_table_factory" to make it possible to use plain table factory

db/c.cc

@@ -25,6 +25,7 @@
 #include "rocksdb/universal_compaction.h"
 #include "rocksdb/statistics.h"
 #include "rocksdb/slice_transform.h"
+#include "rocksdb/table.h"
 
 using rocksdb::Cache;
 using rocksdb::Comparator;
@@ -1003,6 +1004,18 @@ void rocksdb_options_set_hash_link_list_rep(
   opt->rep.memtable_factory.reset(factory);
 }
 
+void rocksdb_options_set_plain_table_factory(
+    rocksdb_options_t *opt, uint32_t user_key_len, int bloom_bits_per_key,
+    double hash_table_ratio, size_t index_sparseness) {
+  static rocksdb::TableFactory* factory = 0;
+  if (!factory) {
+    factory = rocksdb::NewPlainTableFactory(
+        user_key_len, bloom_bits_per_key,
+        hash_table_ratio, index_sparseness);
+  }
+  opt->rep.table_factory.reset(factory);
+}
+
 void rocksdb_options_set_max_successive_merges(
     rocksdb_options_t* opt, size_t v) {
   opt->rep.max_successive_merges = v;

db/c_test.c

@@ -443,6 +443,7 @@ int main(int argc, char** argv) {
     rocksdb_options_set_filter_policy(options, policy);
     rocksdb_options_set_prefix_extractor(options, rocksdb_slicetransform_create_fixed_prefix(3));
     rocksdb_options_set_hash_skip_list_rep(options, 50000, 4, 4);
+    rocksdb_options_set_plain_table_factory(options, 4, 10, 0.75, 16);
 
     db = rocksdb_open(options, dbname, &err);
     CheckNoError(err);

include/rocksdb/c.h

@@ -348,6 +348,7 @@ extern void rocksdb_options_prepare_for_bulk_load(rocksdb_options_t*);
 extern void rocksdb_options_set_memtable_vector_rep(rocksdb_options_t*);
 extern void rocksdb_options_set_hash_skip_list_rep(rocksdb_options_t*, size_t, int32_t, int32_t);
 extern void rocksdb_options_set_hash_link_list_rep(rocksdb_options_t*, size_t);
+extern void rocksdb_options_set_plain_table_factory(rocksdb_options_t*, uint32_t, int, double, size_t);
 
 extern void rocksdb_options_set_max_bytes_for_level_base(rocksdb_options_t* opt, uint64_t n);
 extern void rocksdb_options_set_stats_dump_period_sec(rocksdb_options_t* opt, unsigned int sec);