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C API: support writebatch delete range 

Summary:
Seem that writebatch delete range can work now, so I add C API for later use.

Btw, can we use this feature in production now?
Closes https://github.com/facebook/rocksdb/pull/1647

Differential Revision: D4314534

Pulled By: ajkr

fbshipit-source-id: e835165
This commit is contained in:
siddontang 2016-12-13 11:08:45 -08:00 committed by Facebook Github Bot
parent 2ba59b5a1e
commit b57dd9262a
3 changed files with 81 additions and 0 deletions
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47
db/c.cc
View File

@ -1250,6 +1250,53 @@ void rocksdb_writebatch_deletev_cf(
b->rep.Delete(column_family->rep, SliceParts(key_slices.data(), num_keys));
}
void rocksdb_writebatch_delete_range(rocksdb_writebatch_t* b,
const char* start_key,
size_t start_key_len, const char* end_key,
size_t end_key_len) {
b->rep.DeleteRange(Slice(start_key, start_key_len),
Slice(end_key, end_key_len));
}
void rocksdb_writebatch_delete_range_cf(
rocksdb_writebatch_t* b, rocksdb_column_family_handle_t* column_family,
const char* start_key, size_t start_key_len, const char* end_key,
size_t end_key_len) {
b->rep.DeleteRange(column_family->rep, Slice(start_key, start_key_len),
Slice(end_key, end_key_len));
}
void rocksdb_writebatch_delete_rangev(rocksdb_writebatch_t* b, int num_keys,
const char* const* start_keys_list,
const size_t* start_keys_list_sizes,
const char* const* end_keys_list,
const size_t* end_keys_list_sizes) {
std::vector<Slice> start_key_slices(num_keys);
std::vector<Slice> end_key_slices(num_keys);
for (int i = 0; i < num_keys; i++) {
start_key_slices[i] = Slice(start_keys_list[i], start_keys_list_sizes[i]);
end_key_slices[i] = Slice(end_keys_list[i], end_keys_list_sizes[i]);
}
b->rep.DeleteRange(SliceParts(start_key_slices.data(), num_keys),
SliceParts(end_key_slices.data(), num_keys));
}
void rocksdb_writebatch_delete_rangev_cf(
rocksdb_writebatch_t* b, rocksdb_column_family_handle_t* column_family,
int num_keys, const char* const* start_keys_list,
const size_t* start_keys_list_sizes, const char* const* end_keys_list,
const size_t* end_keys_list_sizes) {
std::vector<Slice> start_key_slices(num_keys);
std::vector<Slice> end_key_slices(num_keys);
for (int i = 0; i < num_keys; i++) {
start_key_slices[i] = Slice(start_keys_list[i], start_keys_list_sizes[i]);
end_key_slices[i] = Slice(end_keys_list[i], end_keys_list_sizes[i]);
}
b->rep.DeleteRange(column_family->rep,
SliceParts(start_key_slices.data(), num_keys),
SliceParts(end_key_slices.data(), num_keys));
}
void rocksdb_writebatch_put_log_data(
rocksdb_writebatch_t* b,
const char* blob, size_t len) {

18
db/c_test.c
View File

@ -453,6 +453,24 @@ int main(int argc, char** argv) {
int pos = 0;
rocksdb_writebatch_iterate(wb, &pos, CheckPut, CheckDel);
CheckCondition(pos == 3);
rocksdb_writebatch_clear(wb);
rocksdb_writebatch_put(wb, "bar", 3, "b", 1);
rocksdb_writebatch_put(wb, "bay", 3, "d", 1);
rocksdb_writebatch_delete_range(wb, "bar", 3, "bay", 3);
rocksdb_write(db, woptions, wb, &err);
CheckNoError(err);
CheckGet(db, roptions, "bar", NULL);
CheckGet(db, roptions, "bay", "d");
rocksdb_writebatch_clear(wb);
const char* start_list[1] = {"bay"};
const size_t start_sizes[1] = {3};
const char* end_list[1] = {"baz"};
const size_t end_sizes[1] = {3};
rocksdb_writebatch_delete_rangev(wb, 1, start_list, start_sizes, end_list,
end_sizes);
rocksdb_write(db, woptions, wb, &err);
CheckNoError(err);
CheckGet(db, roptions, "bay", NULL);
rocksdb_writebatch_destroy(wb);
}

16
include/rocksdb/c.h
View File

@ -424,6 +424,22 @@ extern ROCKSDB_LIBRARY_API void rocksdb_writebatch_deletev(
extern ROCKSDB_LIBRARY_API void rocksdb_writebatch_deletev_cf(
rocksdb_writebatch_t* b, rocksdb_column_family_handle_t* column_family,
int num_keys, const char* const* keys_list, const size_t* keys_list_sizes);
extern ROCKSDB_LIBRARY_API void rocksdb_writebatch_delete_range(
rocksdb_writebatch_t* b, const char* start_key, size_t start_key_len,
const char* end_key, size_t end_key_len);
extern ROCKSDB_LIBRARY_API void rocksdb_writebatch_delete_range_cf(
rocksdb_writebatch_t* b, rocksdb_column_family_handle_t* column_family,
const char* start_key, size_t start_key_len, const char* end_key,
size_t end_key_len);
extern ROCKSDB_LIBRARY_API void rocksdb_writebatch_delete_rangev(
rocksdb_writebatch_t* b, int num_keys, const char* const* start_keys_list,
const size_t* start_keys_list_sizes, const char* const* end_keys_list,
const size_t* end_keys_list_sizes);
extern ROCKSDB_LIBRARY_API void rocksdb_writebatch_delete_rangev_cf(
rocksdb_writebatch_t* b, rocksdb_column_family_handle_t* column_family,
int num_keys, const char* const* start_keys_list,
const size_t* start_keys_list_sizes, const char* const* end_keys_list,
const size_t* end_keys_list_sizes);
extern ROCKSDB_LIBRARY_API void rocksdb_writebatch_put_log_data(
rocksdb_writebatch_t*, const char* blob, size_t len);
extern ROCKSDB_LIBRARY_API void rocksdb_writebatch_iterate(