Merge pull request #31 from tidesdb/v0-5-0

extend api with column family clone method and transaction reset capa…

Author: guycipher

src/tidesdb.lua

@@ -117,6 +117,7 @@ ffi.cdef[[
     int tidesdb_create_column_family(void* db, const char* name, tidesdb_column_family_config_t* config);
     int tidesdb_drop_column_family(void* db, const char* name);
     int tidesdb_rename_column_family(void* db, const char* old_name, const char* new_name);
+    int tidesdb_clone_column_family(void* db, const char* source_name, const char* dest_name);
     void* tidesdb_get_column_family(void* db, const char* name);
     int tidesdb_list_column_families(void* db, char*** names, int* count);
 
@@ -129,6 +130,7 @@ ffi.cdef[[
     int tidesdb_txn_commit(void* txn);
     int tidesdb_txn_rollback(void* txn);
     void tidesdb_txn_free(void* txn);
+    int tidesdb_txn_reset(void* txn, int isolation);
     int tidesdb_txn_savepoint(void* txn, const char* name);
     int tidesdb_txn_rollback_to_savepoint(void* txn, const char* name);
     int tidesdb_txn_release_savepoint(void* txn, const char* name);
@@ -703,6 +705,16 @@ function Transaction:rollback()
     check_result(result, "failed to rollback transaction")
 end
 
+function Transaction:reset(isolation)
+    if self._closed then
+        error(TidesDBError.new("Transaction is closed"))
+    end
+
+    local result = lib.tidesdb_txn_reset(self._txn, isolation)
+    check_result(result, "failed to reset transaction")
+    self._committed = false
+end
+
 function Transaction:savepoint(name)
     if self._closed then
         error(TidesDBError.new("Transaction is closed"))
@@ -855,6 +867,15 @@ function TidesDB:rename_column_family(old_name, new_name)
     check_result(result, "failed to rename column family")
 end
 
+function TidesDB:clone_column_family(source_name, dest_name)
+    if self._closed then
+        error(TidesDBError.new("Database is closed"))
+    end
+
+    local result = lib.tidesdb_clone_column_family(self._db, source_name, dest_name)
+    check_result(result, "failed to clone column family")
+end
+
 function TidesDB:get_column_family(name)
     if self._closed then
         error(TidesDBError.new("Database is closed"))
@@ -1011,6 +1032,6 @@ function tidesdb.save_config_to_ini(ini_file, section_name, config)
 end
 
 -- Version
-tidesdb._VERSION = "0.3.0"
+tidesdb._VERSION = "0.5.0"
 
 return tidesdb

tests/test_tidesdb.lua

@@ -482,6 +482,113 @@ function tests.test_btree_stats_extended()
     print("PASS: test_btree_stats_extended")
 end
 
+function tests.test_clone_column_family()
+    local path = "./test_db_clone_cf"
+    cleanup_db(path)
+    
+    local db = tidesdb.TidesDB.open(path)
+    db:create_column_family("source_cf")
+    local cf = db:get_column_family("source_cf")
+    
+    -- Insert data into source
+    local txn = db:begin_txn()
+    txn:put(cf, "key1", "value1")
+    txn:put(cf, "key2", "value2")
+    txn:commit()
+    txn:free()
+    
+    -- Clone column family
+    db:clone_column_family("source_cf", "cloned_cf")
+    
+    -- Verify cloned column family exists
+    local cloned_cf = db:get_column_family("cloned_cf")
+    assert_true(cloned_cf ~= nil, "cloned column family should exist")
+    
+    -- Verify data is preserved in clone
+    local read_txn = db:begin_txn()
+    local v1 = read_txn:get(cloned_cf, "key1")
+    local v2 = read_txn:get(cloned_cf, "key2")
+    assert_eq(v1, "value1", "cloned key1 should have correct value")
+    assert_eq(v2, "value2", "cloned key2 should have correct value")
+    read_txn:free()
+    
+    -- Verify source still works independently
+    local src_txn = db:begin_txn()
+    local sv1 = src_txn:get(cf, "key1")
+    assert_eq(sv1, "value1", "source key1 should still exist")
+    src_txn:free()
+    
+    -- Verify modifications to clone don't affect source
+    local write_txn = db:begin_txn()
+    write_txn:put(cloned_cf, "key3", "value3")
+    write_txn:commit()
+    write_txn:free()
+    
+    local verify_txn = db:begin_txn()
+    local v3 = verify_txn:get(cloned_cf, "key3")
+    assert_eq(v3, "value3", "key3 should exist in clone")
+    local err = assert_error(function()
+        verify_txn:get(cf, "key3")
+    end, "key3 should not exist in source")
+    verify_txn:free()
+    
+    -- Verify cloning to existing name fails
+    local clone_err = assert_error(function()
+        db:clone_column_family("source_cf", "cloned_cf")
+    end, "cloning to existing name should fail")
+    
+    db:drop_column_family("source_cf")
+    db:drop_column_family("cloned_cf")
+    db:close()
+    cleanup_db(path)
+    print("PASS: test_clone_column_family")
+end
+
+function tests.test_transaction_reset()
+    local path = "./test_db_txn_reset"
+    cleanup_db(path)
+    
+    local db = tidesdb.TidesDB.open(path)
+    db:create_column_family("test_cf")
+    local cf = db:get_column_family("test_cf")
+    
+    -- Begin transaction and do first batch of work
+    local txn = db:begin_txn()
+    txn:put(cf, "key1", "value1")
+    txn:commit()
+    
+    -- Reset transaction instead of free + begin
+    txn:reset(tidesdb.IsolationLevel.READ_COMMITTED)
+    
+    -- Second batch of work using the same transaction
+    txn:put(cf, "key2", "value2")
+    txn:commit()
+    
+    -- Reset again with different isolation level
+    txn:reset(tidesdb.IsolationLevel.SERIALIZABLE)
+    
+    -- Third batch
+    txn:put(cf, "key3", "value3")
+    txn:commit()
+    
+    txn:free()
+    
+    -- Verify all data was written
+    local read_txn = db:begin_txn()
+    local v1 = read_txn:get(cf, "key1")
+    local v2 = read_txn:get(cf, "key2")
+    local v3 = read_txn:get(cf, "key3")
+    assert_eq(v1, "value1", "key1 should exist after reset")
+    assert_eq(v2, "value2", "key2 should exist after reset")
+    assert_eq(v3, "value3", "key3 should exist after reset")
+    read_txn:free()
+    
+    db:drop_column_family("test_cf")
+    db:close()
+    cleanup_db(path)
+    print("PASS: test_transaction_reset")
+end
+
 -- Run all tests
 local function run_tests()
     print("Running TidesDB Lua tests...")

tidesdb-0.4.0-1.rockspec tidesdb-0.5.0-1.rockspectidesdb-0.4.0-1.rockspec renamed to tidesdb-0.5.0-1.rockspec

@@ -1,8 +1,8 @@
 package = "tidesdb"
-version = "0.4.0-1"
+version = "0.5.0-1"
 source = {
    url = "git://github.com/tidesdb/tidesdb-lua.git",
-   tag = "v0.4.0"
+   tag = "v0.5.0"
 }
 description = {
    summary = "Official Lua bindings for TidesDB - A high-performance embedded key-value storage engine",