diff --git a/rocksdb.nim b/rocksdb.nim
index e924873..df9871c 100644
--- a/rocksdb.nim
+++ b/rocksdb.nim
@@ -9,4 +9,4 @@
 
 import ./rocksdb/[backup, rocksdb, rocksiterator, transactiondb, writebatch]
 
-export backup, rocksdb, rocksiterator, transactiondb, writebatch
\ No newline at end of file
+export backup, rocksdb, rocksiterator, transactiondb, writebatch
diff --git a/rocksdb/backup.nim b/rocksdb/backup.nim
index a797914..2591362 100644
--- a/rocksdb/backup.nim
+++ b/rocksdb/backup.nim
@@ -90,5 +90,3 @@ proc close*(backupEngine: var BackupEngineRef) =
   if not backupEngine.isClosed():
     rocksdb_backup_engine_close(backupEngine.cPtr)
     backupEngine.cPtr = nil
-
-
diff --git a/rocksdb/columnfamily/cfhandle.nim b/rocksdb/columnfamily/cfhandle.nim
index 1a0a625..9b8dc60 100644
--- a/rocksdb/columnfamily/cfhandle.nim
+++ b/rocksdb/columnfamily/cfhandle.nim
@@ -47,4 +47,4 @@ proc cPtr*(handle: ColFamilyHandleRef): ColFamilyHandlePtr =
 proc close*(handle: var ColFamilyHandleRef) =
   if not handle.isClosed():
     rocksdb_column_family_handle_destroy(handle.cPtr)
-    handle.cPtr = nil
\ No newline at end of file
+    handle.cPtr = nil
diff --git a/rocksdb/columnfamily/cfopts.nim b/rocksdb/columnfamily/cfopts.nim
index be04b40..d5eed30 100644
--- a/rocksdb/columnfamily/cfopts.nim
+++ b/rocksdb/columnfamily/cfopts.nim
@@ -50,4 +50,3 @@ proc close*(cfOpts: var ColFamilyOptionsRef) =
   if not cfOpts.isClosed():
     rocksdb_options_destroy(cfOpts.cPtr)
     cfOpts.cPtr = nil
-
diff --git a/rocksdb/internal/cftable.nim b/rocksdb/internal/cftable.nim
index c397eb3..20c7fb6 100644
--- a/rocksdb/internal/cftable.nim
+++ b/rocksdb/internal/cftable.nim
@@ -41,4 +41,4 @@ proc close*(table: var ColFamilyTableRef) =
   if not table.isClosed():
     for _, v in table.columnFamilies.mpairs():
       v.close()
-    table.columnFamilies = nil
\ No newline at end of file
+    table.columnFamilies = nil
diff --git a/rocksdb/internal/utils.nim b/rocksdb/internal/utils.nim
index 045f3ba..0fa116f 100644
--- a/rocksdb/internal/utils.nim
+++ b/rocksdb/internal/utils.nim
@@ -18,4 +18,4 @@ template bailOnErrors*(errors: cstring): auto =
   if not errors.isNil:
     let res = err($(errors))
     rocksdb_free(errors)
-    return res
\ No newline at end of file
+    return res
diff --git a/rocksdb/lib/librocksdb.nim b/rocksdb/lib/librocksdb.nim
index db11310..b64faef 100644
--- a/rocksdb/lib/librocksdb.nim
+++ b/rocksdb/lib/librocksdb.nim
@@ -3202,4 +3202,4 @@ proc rocksdb_wait_for_compact_options_set_timeout*(
     importc: "rocksdb_wait_for_compact_options_set_timeout", dynlib: librocksdb.}
 proc rocksdb_wait_for_compact_options_get_timeout*(
     opt: ptr rocksdb_wait_for_compact_options_t): uint64 {.cdecl,
-    importc: "rocksdb_wait_for_compact_options_get_timeout", dynlib: librocksdb.}
\ No newline at end of file
+    importc: "rocksdb_wait_for_compact_options_get_timeout", dynlib: librocksdb.}
diff --git a/rocksdb/options/backupopts.nim b/rocksdb/options/backupopts.nim
index c7815fa..2161544 100644
--- a/rocksdb/options/backupopts.nim
+++ b/rocksdb/options/backupopts.nim
@@ -38,4 +38,3 @@ proc close*(engineOpts: var BackupEngineOptionsRef) =
   if not engineOpts.isClosed():
     rocksdb_options_destroy(engineOpts.cPtr)
     engineOpts.cPtr = nil
-
diff --git a/rocksdb/options/dbopts.nim b/rocksdb/options/dbopts.nim
index e99e120..4edf22e 100644
--- a/rocksdb/options/dbopts.nim
+++ b/rocksdb/options/dbopts.nim
@@ -82,4 +82,3 @@ proc close*(dbOpts: var DbOptionsRef) =
   if not dbOpts.isClosed():
     rocksdb_options_destroy(dbOpts.cPtr)
     dbOpts.cPtr = nil
-
diff --git a/rocksdb/options/readopts.nim b/rocksdb/options/readopts.nim
index 8cc86b9..05be81c 100644
--- a/rocksdb/options/readopts.nim
+++ b/rocksdb/options/readopts.nim
@@ -38,4 +38,3 @@ proc close*(readOpts: var ReadOptionsRef) =
   if not readOpts.isClosed():
     rocksdb_readoptions_destroy(readOpts.cPtr)
     readOpts.cPtr = nil
-
diff --git a/rocksdb/options/writeopts.nim b/rocksdb/options/writeopts.nim
index 5a635f9..abdfe7d 100644
--- a/rocksdb/options/writeopts.nim
+++ b/rocksdb/options/writeopts.nim
@@ -38,4 +38,3 @@ proc close*(writeOpts: var WriteOptionsRef) =
   if not writeOpts.isClosed():
     rocksdb_writeoptions_destroy(writeOpts.cPtr)
     writeOpts.cPtr = nil
-
diff --git a/rocksdb/rocksdb.nim b/rocksdb/rocksdb.nim
index a19e815..f858190 100644
--- a/rocksdb/rocksdb.nim
+++ b/rocksdb/rocksdb.nim
@@ -35,6 +35,7 @@ type
     path: string
     dbOpts: DbOptionsRef
     readOpts: ReadOptionsRef
+    defaultCfName: string
     cfTable: ColFamilyTableRef
 
   RocksDbReadOnlyRef* = ref object of RocksDbRef
@@ -57,7 +58,6 @@ proc openRocksDb*(
     cfOpts = columnFamilies.mapIt(it.options.cPtr)
     columnFamilyHandles = newSeq[ColFamilyHandlePtr](columnFamilies.len)
     errors: cstring
-
   let rocksDbPtr = rocksdb_open_column_families(
         dbOpts.cPtr,
         path.cstring,
@@ -74,6 +74,7 @@ proc openRocksDb*(
       dbOpts: dbOpts,
       readOpts: readOpts,
       writeOpts: writeOpts,
+      defaultCfName: DEFAULT_COLUMN_FAMILY_NAME,
       cfTable: newColFamilyTable(cfNames.mapIt($it), columnFamilyHandles))
   ok(db)
 
@@ -92,7 +93,6 @@ proc openRocksDbReadOnly*(
     cfOpts = columnFamilies.mapIt(it.options.cPtr)
     columnFamilyHandles = newSeq[ColFamilyHandlePtr](columnFamilies.len)
     errors: cstring
-
   let rocksDbPtr = rocksdb_open_for_read_only_column_families(
         dbOpts.cPtr,
         path.cstring,
@@ -109,6 +109,7 @@ proc openRocksDbReadOnly*(
       path: path,
       dbOpts: dbOpts,
       readOpts: readOpts,
+      defaultCfName: DEFAULT_COLUMN_FAMILY_NAME,
       cfTable: newColFamilyTable(cfNames.mapIt($it), columnFamilyHandles))
   ok(db)
 
@@ -119,11 +120,18 @@ proc cPtr*(db: RocksDbRef): RocksDbPtr =
   doAssert not db.isClosed()
   db.cPtr
 
+proc withDefaultColFamily*(db: RocksDbRef | RocksDbReadWriteRef, name: string): auto =
+  db.defaultCfName = name
+  db
+
+proc defaultColFamily*(db: RocksDbRef): string =
+  db.defaultCfName
+
 proc get*(
     db: RocksDbRef,
     key: openArray[byte],
     onData: DataProc,
-    columnFamily = DEFAULT_COLUMN_FAMILY_NAME): RocksDBResult[bool] =
+    columnFamily = db.defaultCfName): RocksDBResult[bool] =
 
   if key.len() == 0:
     return err("rocksdb: key is empty")
@@ -156,7 +164,7 @@ proc get*(
 proc get*(
     db: RocksDbRef,
     key: openArray[byte],
-    columnFamily = DEFAULT_COLUMN_FAMILY_NAME): RocksDBResult[seq[byte]] =
+    columnFamily = db.defaultCfName): RocksDBResult[seq[byte]] =
 
   var dataRes: RocksDBResult[seq[byte]]
   proc onData(data: openArray[byte]) =
@@ -169,9 +177,9 @@ proc get*(
   dataRes.err(res.error())
 
 proc put*(
-    db: var RocksDbReadWriteRef,
+    db: RocksDbReadWriteRef,
     key, val: openArray[byte],
-    columnFamily = DEFAULT_COLUMN_FAMILY_NAME): RocksDBResult[void] =
+    columnFamily = db.defaultCfName): RocksDBResult[void] =
 
   if key.len() == 0:
     return err("rocksdb: key is empty")
@@ -197,7 +205,7 @@ proc put*(
 proc keyExists*(
     db: RocksDbRef,
     key: openArray[byte],
-    columnFamily = DEFAULT_COLUMN_FAMILY_NAME): RocksDBResult[bool] =
+    columnFamily = db.defaultCfName): RocksDBResult[bool] =
 
   # TODO: Call rocksdb_key_may_exist_cf to improve performance for the case
   # when the key does not exist
@@ -205,9 +213,9 @@ proc keyExists*(
   db.get(key, proc(data: openArray[byte]) = discard, columnFamily)
 
 proc delete*(
-    db: var RocksDbReadWriteRef,
+    db: RocksDbReadWriteRef,
     key: openArray[byte],
-    columnFamily = DEFAULT_COLUMN_FAMILY_NAME): RocksDBResult[void] =
+    columnFamily = db.defaultCfName): RocksDBResult[void] =
 
   if key.len() == 0:
     return err("rocksdb: key is empty")
@@ -230,7 +238,7 @@ proc delete*(
 
 proc openIterator*(
     db: RocksDbRef,
-    columnFamily = DEFAULT_COLUMN_FAMILY_NAME): RocksDBResult[RocksIteratorRef] =
+    columnFamily = db.defaultCfName): RocksDBResult[RocksIteratorRef] =
   doAssert not db.isClosed()
 
   let cfHandle  = db.cfTable.get(columnFamily)
@@ -244,9 +252,12 @@ proc openIterator*(
 
   ok(newRocksIterator(rocksIterPtr))
 
-proc openWriteBatch*(db: RocksDbReadWriteRef): WriteBatchRef =
+proc openWriteBatch*(
+    db: RocksDbReadWriteRef,
+    columnFamily = db.defaultCfName): WriteBatchRef =
   doAssert not db.isClosed()
-  newWriteBatch(db.cfTable)
+
+  newWriteBatch(db.cfTable, columnFamily)
 
 proc write*(db: var RocksDbReadWriteRef, updates: WriteBatchRef): RocksDBResult[void] =
   doAssert not db.isClosed()
@@ -271,4 +282,4 @@ proc close*(db: RocksDbRef) =
       db.RocksDbReadWriteRef.writeOpts.close()
 
     rocksdb_close(db.cPtr)
-    db.cPtr = nil
\ No newline at end of file
+    db.cPtr = nil
diff --git a/rocksdb/rocksresult.nim b/rocksdb/rocksresult.nim
index d1b1438..290005d 100644
--- a/rocksdb/rocksresult.nim
+++ b/rocksdb/rocksresult.nim
@@ -18,4 +18,4 @@ export
 type
   RocksDBResult*[T] = Result[T, string]
 
-  DataProc* = proc(val: openArray[byte]) {.gcsafe, raises: [].}
\ No newline at end of file
+  DataProc* = proc(val: openArray[byte]) {.gcsafe, raises: [].}
diff --git a/rocksdb/transactiondb.nim b/rocksdb/transactiondb.nim
index 091d86b..8d306e6 100644
--- a/rocksdb/transactiondb.nim
+++ b/rocksdb/transactiondb.nim
@@ -79,7 +79,8 @@ proc beginTransaction*(
     db: TransactionDbRef,
     readOpts = defaultReadOptions(),
     writeOpts = defaultWriteOptions(),
-    txOpts = defaultTransactionOptions()): TransactionRef =
+    txOpts = defaultTransactionOptions(),
+    columnFamily = DEFAULT_COLUMN_FAMILY_NAME): TransactionRef =
   doAssert not db.isClosed()
 
   let txPtr = rocksdb_transaction_begin(
@@ -88,7 +89,7 @@ proc beginTransaction*(
         txOpts.cPtr,
         nil)
 
-  newTransaction(txPtr, readOpts, writeOpts, txOpts, db.cfTable)
+  newTransaction(txPtr, readOpts, writeOpts, txOpts, columnFamily, db.cfTable)
 
 proc close*(db: var TransactionDbRef) =
   if not db.isClosed():
diff --git a/rocksdb/transactions/transaction.nim b/rocksdb/transactions/transaction.nim
index 06c28eb..f5adaea 100644
--- a/rocksdb/transactions/transaction.nim
+++ b/rocksdb/transactions/transaction.nim
@@ -28,6 +28,7 @@ type
     readOpts: ReadOptionsRef
     writeOpts: WriteOptionsRef
     txOpts: TransactionOptionsRef
+    defaultCfName: string
     cfTable: ColFamilyTableRef
 
 proc newTransaction*(
@@ -35,6 +36,7 @@ proc newTransaction*(
     readOpts: ReadOptionsRef,
     writeOpts: WriteOptionsRef,
     txOpts: TransactionOptionsRef,
+    defaultCfName: string,
     cfTable: ColFamilyTableRef): TransactionRef =
 
   TransactionRef(
@@ -42,16 +44,24 @@ proc newTransaction*(
       readOpts: readOpts,
       writeOpts: writeOpts,
       txOpts: txOpts,
+      defaultCfName: defaultCfName,
       cfTable: cfTable)
 
 template isClosed*(tx: TransactionRef): bool =
   tx.cPtr.isNil()
 
+proc withDefaultColFamily*(tx: var TransactionRef, name: string): TransactionRef =
+  tx.defaultCfName = name
+  tx
+
+proc defaultColFamily*(tx: TransactionRef): string =
+  tx.defaultCfName
+
 proc get*(
     tx: TransactionRef,
     key: openArray[byte],
     onData: DataProc,
-    columnFamily = DEFAULT_COLUMN_FAMILY_NAME): RocksDBResult[bool] =
+    columnFamily = tx.defaultCfName): RocksDBResult[bool] =
 
   if key.len() == 0:
     return err("rocksdb: key is empty")
@@ -84,7 +94,7 @@ proc get*(
 proc get*(
     tx: TransactionRef,
     key: openArray[byte],
-    columnFamily = DEFAULT_COLUMN_FAMILY_NAME): RocksDBResult[seq[byte]] =
+    columnFamily = tx.defaultCfName): RocksDBResult[seq[byte]] =
 
   var dataRes: RocksDBResult[seq[byte]]
   proc onData(data: openArray[byte]) =
@@ -99,7 +109,7 @@ proc get*(
 proc put*(
     tx: var TransactionRef,
     key, val: openArray[byte],
-    columnFamily = DEFAULT_COLUMN_FAMILY_NAME): RocksDBResult[void] =
+    columnFamily = tx.defaultCfName): RocksDBResult[void] =
 
   if key.len() == 0:
     return err("rocksdb: key is empty")
@@ -124,7 +134,7 @@ proc put*(
 proc delete*(
     tx: var TransactionRef,
     key: openArray[byte],
-    columnFamily = DEFAULT_COLUMN_FAMILY_NAME): RocksDBResult[void] =
+    columnFamily = tx.defaultCfName): RocksDBResult[void] =
 
   if key.len() == 0:
     return err("rocksdb: key is empty")
diff --git a/rocksdb/transactions/txdbopts.nim b/rocksdb/transactions/txdbopts.nim
index e8b84cf..729f3e1 100644
--- a/rocksdb/transactions/txdbopts.nim
+++ b/rocksdb/transactions/txdbopts.nim
@@ -38,4 +38,3 @@ proc close*(txDbOpts: var TransactionDbOptionsRef) =
   if not txDbOpts.isClosed():
     rocksdb_transactiondb_options_destroy(txDbOpts.cPtr)
     txDbOpts.cPtr = nil
-
diff --git a/rocksdb/transactions/txopts.nim b/rocksdb/transactions/txopts.nim
index 1e4de66..4ab867e 100644
--- a/rocksdb/transactions/txopts.nim
+++ b/rocksdb/transactions/txopts.nim
@@ -38,4 +38,3 @@ proc close*(txOpts: var TransactionOptionsRef) =
   if not txOpts.isClosed():
     rocksdb_transaction_options_destroy(txOpts.cPtr)
     txOpts.cPtr = nil
-
diff --git a/rocksdb/writebatch.nim b/rocksdb/writebatch.nim
index 580bbc9..249ef44 100644
--- a/rocksdb/writebatch.nim
+++ b/rocksdb/writebatch.nim
@@ -22,11 +22,13 @@ type
 
   WriteBatchRef* = ref object
     cPtr: WriteBatchPtr
+    defaultCfName: string
     cfTable: ColFamilyTableRef
 
-proc newWriteBatch*(cfTable: ColFamilyTableRef): WriteBatchRef =
+proc newWriteBatch*(cfTable: ColFamilyTableRef, defaultCfName: string): WriteBatchRef =
   WriteBatchRef(
     cPtr: rocksdb_writebatch_create(),
+    defaultCfName: defaultCfName,
     cfTable: cfTable)
 
 template isClosed*(batch: WriteBatchRef): bool =
diff --git a/tests/test_backup.nim b/tests/test_backup.nim
index f8b9f9f..376d142 100644
--- a/tests/test_backup.nim
+++ b/tests/test_backup.nim
@@ -67,4 +67,4 @@ suite "BackupEngineRef Tests":
     engine.close()
     check engine.isClosed()
     engine.close()
-    check engine.isClosed()
\ No newline at end of file
+    check engine.isClosed()
diff --git a/tests/test_helper.nim b/tests/test_helper.nim
index 4493950..208317a 100644
--- a/tests/test_helper.nim
+++ b/tests/test_helper.nim
@@ -12,7 +12,8 @@
 import
     std/sequtils,
   ../rocksdb/backup,
-  ../rocksdb/rocksdb
+  ../rocksdb/rocksdb,
+  ../rocksdb/transactiondb
 
 
 proc initReadWriteDb*(
@@ -43,4 +44,16 @@ proc initBackupEngine*(path: string): BackupEngineRef =
 
   let res = openBackupEngine(path)
   doAssert res.isOk()
+  res.value()
+
+proc initTransactionDb*(
+    path: string,
+    columnFamilyNames = @["default"]): TransactionDbRef =
+
+  let res = openTransactionDb(
+      path,
+      columnFamilies = columnFamilyNames.mapIt(initColFamilyDescriptor(it)))
+  if res.isErr():
+    echo res.error()
+  doAssert res.isOk()
   res.value()
\ No newline at end of file
diff --git a/tests/test_rocksdb.nim b/tests/test_rocksdb.nim
index beb4208..3490da1 100644
--- a/tests/test_rocksdb.nim
+++ b/tests/test_rocksdb.nim
@@ -234,4 +234,15 @@ suite "RocksDbRef Tests":
 
     db.close()
     check db.isClosed()
-    removeDir(dbDir)
\ No newline at end of file
+    removeDir(dbDir)
+
+  test "Test withDefaultColFamily":
+    var
+      dbDir = mkdtemp()
+      db = initReadWriteDb(dbDir,
+          columnFamilyNames = @[CF_DEFAULT, CF_OTHER]).withDefaultColFamily(CF_OTHER)
+
+    check:
+      db.put(key, val).isOk()
+      not db.keyExists(key, CF_DEFAULT).get()
+      db.keyExists(key, CF_OTHER).get()