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added a test case for custom merge operator

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This commit is contained in:
Thomas Adam 2014-02-23 17:58:38 +01:00
parent 68248a2ac5
commit ce2b1f7b44
1 changed files with 60 additions and 1 deletions
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61
db/c_test.c
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@ -154,6 +154,37 @@ unsigned char FilterKeyMatch(
return fake_filter_result;
}
// Custom merge operator
static void MergeOperatorDestroy(void* arg) { }
static const char* MergeOperatorName(void* arg) {
return "TestMergeOperator";
}
static char* MergeOperatorFullMerge(
void* arg,
const char* key, size_t key_length,
const char* existing_value, size_t existing_value_length,
const char* const* operands_list, const size_t* operands_list_length,
int num_operands,
unsigned char* success, size_t* new_value_length) {
*new_value_length = 4;
*success = 1;
char* result = malloc(4);
memcpy(result, "fake", 4);
return result;
}
static char* MergeOperatorPartialMerge(
void* arg,
const char* key, size_t key_length,
const char* left_operand, size_t left_operand_length,
const char* right_operand, size_t right_operand_length,
unsigned char* success, size_t* new_value_length) {
*new_value_length = 4;
*success = 1;
char* result = malloc(4);
memcpy(result, "fake", 4);
return result;
}
int main(int argc, char** argv) {
rocksdb_t* db;
rocksdb_comparator_t* cmp;
@ -342,7 +373,7 @@ int main(int argc, char** argv) {
rocksdb_filterpolicy_t* policy;
if (run == 0) {
policy = rocksdb_filterpolicy_create(
NULL, FilterDestroy, FilterCreate, FilterKeyMatch, FilterName);
NULL, FilterDestroy, FilterCreate, FilterKeyMatch, NULL, FilterName);
} else {
policy = rocksdb_filterpolicy_create_bloom(10);
}
@ -376,6 +407,34 @@ int main(int argc, char** argv) {
rocksdb_filterpolicy_destroy(policy);
}
StartPhase("merge_operator");
{
rocksdb_mergeoperator_t* merge_operator;
merge_operator = rocksdb_mergeoperator_create(
NULL, MergeOperatorDestroy, MergeOperatorFullMerge,
MergeOperatorPartialMerge, NULL, MergeOperatorName);
// Create new database
rocksdb_close(db);
rocksdb_destroy_db(options, dbname, &err);
rocksdb_options_set_merger_operator(options, merge_operator);
db = rocksdb_open(options, dbname, &err);
CheckNoError(err);
rocksdb_put(db, woptions, "foo", 3, "foovalue", 8, &err);
CheckNoError(err);
CheckGet(db, roptions, "foo", "foovalue");
rocksdb_merge(db, woptions, "foo", 3, "barvalue", 8, &err);
CheckNoError(err);
CheckGet(db, roptions, "foo", "fake");
// Merge of a non-existing value
rocksdb_merge(db, woptions, "bar", 3, "barvalue", 8, &err);
CheckNoError(err);
CheckGet(db, roptions, "bar", "fake");
rocksdb_options_set_merger_operator(options, NULL);
rocksdb_mergeoperator_destroy(merge_operator);
}
StartPhase("cleanup");
rocksdb_close(db);
rocksdb_options_destroy(options);