How can I get the default CF_handle by C API? about rocksdb

[jowlyzhang]

In C++, there is a straightforward API DB::DefaultColumnFamily for this, but there is no counterpart API in C.

rocksdb/include/rocksdb/db.h

Line 1927 in 046ac91

virtual ColumnFamilyHandle* DefaultColumnFamily() const = 0;

A workaround would be to use this rocksdb_open_column_families API to open the DB

rocksdb/db/c.cc

Lines 915 to 919 in 046ac91

	rocksdb_t* rocksdb_open_column_families(
	const rocksdb_options_t* db_options, const char* name,
	int num_column_families, const char* const* column_family_names,
	const rocksdb_options_t* const* column_family_options,
	rocksdb_column_family_handle_t** column_family_handles, char** errptr) {

Passing the column_family_handles output argument to get a handle for the default column family to keep for your own use.