diff --git a/Makefile b/Makefile
index 6360b1e8..2fd48527 100644
--- a/Makefile
+++ b/Makefile
@@ -187,25 +187,25 @@ test-oracle: test-godror
 
 .PNONY: test-oci8
 test-oci8: go-check
-	$(GO) test -race -tags=oracle -db=oci8 -schema='$(TEST_ORACLE_SCHEMA)' -cache=$(TEST_CACHE_ENABLE) \
+	$(GO) test -v -race -tags=oracle -db=oci8 -schema='$(TEST_ORACLE_SCHEMA)' -cache=$(TEST_CACHE_ENABLE) \
 	-conn_str="$(TEST_ORACLE_USERNAME):$(TEST_ORACLE_PASSWORD)@$(TEST_ORACLE_HOST)/$(TEST_ORACLE_DBNAME)" \
 	-coverprofile=oracle.$(TEST_CACHE_ENABLE).coverage.out -covermode=atomic
 
 .PHONY: test-oci8\#%
 test-oci8\#%: go-check
-	$(GO) test -race -run $* -tags=oracle -db=oci8 -schema='$(TEST_PGSQL_SCHEMA)' -cache=$(TEST_CACHE_ENABLE) \
+	$(GO) test -v -race -run $* -tags=oracle -db=oci8 -schema='$(TEST_PGSQL_SCHEMA)' -cache=$(TEST_CACHE_ENABLE) \
 	-conn_str="postgres://$(TEST_PGSQL_USERNAME):$(TEST_PGSQL_PASSWORD)@$(TEST_PGSQL_HOST)/$(TEST_PGSQL_DBNAME)" \
 	-coverprofile=oracle.$(TEST_CACHE_ENABLE).coverage.out -covermode=atomic
 
 .PHONY: test-godror
 test-godror: go-check
-	$(GO) test -race -tags=oracle -db=godror -schema='$(TEST_ORACLE_SCHEMA)' -cache=$(TEST_CACHE_ENABLE) \
+	$(GO) test -v -race -tags=oracle -db=godror -schema='$(TEST_ORACLE_SCHEMA)' -cache=$(TEST_CACHE_ENABLE) \
 	-conn_str="oracle://$(TEST_ORACLE_USERNAME):$(TEST_ORACLE_PASSWORD)@$(TEST_ORACLE_HOST)/$(TEST_ORACLE_DBNAME)" \
 	-coverprofile=oracle.$(TEST_CACHE_ENABLE).coverage.out -covermode=atomic
 
 .PHONY: test-godror\#%
 test-godror\#%: go-check
-	$(GO) test -race -run $* -tags=oracle -db=godror -schema='$(TEST_ORACLE_SCHEMA)' -cache=$(TEST_CACHE_ENABLE) \
+	$(GO) test -v -race -run $* -tags=oracle -db=godror -schema='$(TEST_ORACLE_SCHEMA)' -cache=$(TEST_CACHE_ENABLE) \
 	-conn_str="oracle://$(TEST_ORACLE_USERNAME):$(TEST_ORACLE_PASSWORD)@$(TEST_ORACLE_HOST)/$(TEST_ORACLE_DBNAME)" \
 	-coverprofile=oracle.$(TEST_CACHE_ENABLE).coverage.out -covermode=atomic
 
diff --git a/core/interface.go b/core/interface.go
index a5c8e4e2..b2746ae0 100644
--- a/core/interface.go
+++ b/core/interface.go
@@ -7,6 +7,7 @@ import (
 
 // Queryer represents an interface to query a SQL to get data from database
 type Queryer interface {
+	QueryRowContext(ctx context.Context, query string, args ...interface{}) *Row
 	QueryContext(ctx context.Context, query string, args ...interface{}) (*Rows, error)
 }
 
diff --git a/dialects/dialect.go b/dialects/dialect.go
index 53c8cf29..a1299bea 100644
--- a/dialects/dialect.go
+++ b/dialects/dialect.go
@@ -59,7 +59,7 @@ type Dialect interface {
 	GetTables(queryer core.Queryer, ctx context.Context) ([]*schemas.Table, error)
 	IsTableExist(queryer core.Queryer, ctx context.Context, tableName string) (bool, error)
 	CreateTableSQL(table *schemas.Table, tableName string) ([]string, bool)
-	DropTableSQL(tableName string) (string, bool)
+	DropTableSQL(tableName, autoincrCol string) ([]string, bool)
 
 	GetColumns(queryer core.Queryer, ctx context.Context, tableName string) ([]string, map[string]*schemas.Column, error)
 	IsColumnExist(queryer core.Queryer, ctx context.Context, tableName string, colName string) (bool, error)
@@ -100,9 +100,9 @@ func (b *Base) FormatBytes(bs []byte) string {
 	return fmt.Sprintf("0x%x", bs)
 }
 
-func (db *Base) DropTableSQL(tableName string) (string, bool) {
+func (db *Base) DropTableSQL(tableName, autoincrCol string) ([]string, bool) {
 	quote := db.dialect.Quoter().Quote
-	return fmt.Sprintf("DROP TABLE IF EXISTS %s", quote(tableName)), true
+	return []string{fmt.Sprintf("DROP TABLE IF EXISTS %s", quote(tableName))}, true
 }
 
 func (db *Base) HasRecords(queryer core.Queryer, ctx context.Context, query string, args ...interface{}) (bool, error) {
diff --git a/dialects/mssql.go b/dialects/mssql.go
index 8ef924b8..3894e105 100644
--- a/dialects/mssql.go
+++ b/dialects/mssql.go
@@ -311,10 +311,10 @@ func (db *mssql) AutoIncrStr() string {
 	return "IDENTITY"
 }
 
-func (db *mssql) DropTableSQL(tableName string) (string, bool) {
-	return fmt.Sprintf("IF EXISTS (SELECT * FROM sysobjects WHERE id = "+
+func (db *mssql) DropTableSQL(tableName, autoincrCol string) ([]string, bool) {
+	return []string{fmt.Sprintf("IF EXISTS (SELECT * FROM sysobjects WHERE id = "+
 		"object_id(N'%s') and OBJECTPROPERTY(id, N'IsUserTable') = 1) "+
-		"DROP TABLE \"%s\"", tableName, tableName), true
+		"DROP TABLE \"%s\"", tableName, tableName)}, true
 }
 
 func (db *mssql) IndexCheckSQL(tableName, idxName string) (string, []interface{}) {
diff --git a/dialects/oracle.go b/dialects/oracle.go
index d29b1535..3e8b8630 100644
--- a/dialects/oracle.go
+++ b/dialects/oracle.go
@@ -523,9 +523,9 @@ func (db *oracle) SQLType(c *schemas.Column) string {
 	case schemas.Binary, schemas.VarBinary, schemas.Blob, schemas.TinyBlob, schemas.MediumBlob, schemas.LongBlob, schemas.Bytea:
 		return schemas.Blob
 	case schemas.Time, schemas.DateTime, schemas.TimeStamp:
-		res = schemas.TimeStamp
+		res = schemas.Date
 	case schemas.TimeStampz:
-		res = "TIMESTAMP WITH TIME ZONE"
+		res = "TIMESTAMP"
 	case schemas.Float, schemas.Double, schemas.Numeric, schemas.Decimal:
 		res = "NUMBER"
 	case schemas.Text, schemas.MediumText, schemas.LongText, schemas.Json:
@@ -556,8 +556,14 @@ func (db *oracle) IsReserved(name string) bool {
 	return ok
 }
 
-func (db *oracle) DropTableSQL(tableName string) (string, bool) {
-	return fmt.Sprintf("DROP TABLE `%s`", tableName), false
+func (db *oracle) DropTableSQL(tableName, autoincrCol string) ([]string, bool) {
+	var sqls = []string{
+		fmt.Sprintf("DROP TABLE `%s`", tableName),
+	}
+	if autoincrCol != "" {
+		sqls = append(sqls, fmt.Sprintf("DROP SEQUENCE %s", seqName(tableName)))
+	}
+	return sqls, false
 }
 
 func (db *oracle) CreateTableSQL(table *schemas.Table, tableName string) ([]string, bool) {
@@ -589,8 +595,19 @@ func (db *oracle) CreateTableSQL(table *schemas.Table, tableName string) ([]stri
 		sql += " ), "
 	}
 
-	sql = sql[:len(sql)-2] + ")"
-	return []string{sql}, false
+	var sqls = []string{sql[:len(sql)-2] + ")"}
+
+	if table.AutoIncrColumn() != nil {
+		var sql2 = fmt.Sprintf(`CREATE sequence %s 
+			minvalue 1
+       		nomaxvalue
+       		start with 1
+       		increment by 1
+       		nocycle
+			   nocache`, seqName(tableName))
+		sqls = append(sqls, sql2)
+	}
+	return sqls, false
 }
 
 func (db *oracle) SetQuotePolicy(quotePolicy QuotePolicy) {
@@ -627,12 +644,32 @@ func (db *oracle) IsColumnExist(queryer core.Queryer, ctx context.Context, table
 	return db.HasRecords(queryer, ctx, query, args...)
 }
 
-func (db *oracle) GetColumns(queryer core.Queryer, ctx context.Context, tableName string) ([]string, map[string]*schemas.Column, error) {
-	args := []interface{}{tableName}
-	s := "SELECT column_name,data_default,data_type,data_length,data_precision,data_scale," +
-		"nullable FROM USER_TAB_COLUMNS WHERE table_name = :1"
+func seqName(tableName string) string {
+	return "SEQ_" + strings.ToUpper(tableName)
+}
 
-	rows, err := queryer.QueryContext(ctx, s, args...)
+func (db *oracle) GetColumns(queryer core.Queryer, ctx context.Context, tableName string) ([]string, map[string]*schemas.Column, error) {
+	//s := "SELECT column_name,data_default,data_type,data_length,data_precision,data_scale," +
+	//	"nullable FROM USER_TAB_COLUMNS WHERE table_name = :1"
+
+	s := `select   column_name   from   user_cons_columns   
+  where   constraint_name   =   (select   constraint_name   from   user_constraints   
+			  where   table_name   =   :1  and   constraint_type   ='P')`
+	var pkName string
+	err := queryer.QueryRowContext(ctx, s, tableName).Scan(&pkName)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	s = `SELECT USER_TAB_COLS.COLUMN_NAME, USER_TAB_COLS.DATA_DEFAULT, USER_TAB_COLS.DATA_TYPE, USER_TAB_COLS.DATA_LENGTH, 
+		USER_TAB_COLS.data_precision, USER_TAB_COLS.data_scale, USER_TAB_COLS.NULLABLE,
+		user_col_comments.comments
+		FROM USER_TAB_COLS 
+		LEFT JOIN user_col_comments on user_col_comments.TABLE_NAME=USER_TAB_COLS.TABLE_NAME 
+		AND user_col_comments.COLUMN_NAME=USER_TAB_COLS.COLUMN_NAME
+		WHERE USER_TAB_COLS.table_name = :1`
+
+	rows, err := queryer.QueryContext(ctx, s, tableName)
 	if err != nil {
 		return nil, nil, err
 	}
@@ -644,11 +681,11 @@ func (db *oracle) GetColumns(queryer core.Queryer, ctx context.Context, tableNam
 		col := new(schemas.Column)
 		col.Indexes = make(map[string]int)
 
-		var colName, colDefault, nullable, dataType, dataPrecision, dataScale *string
+		var colName, colDefault, nullable, dataType, dataPrecision, dataScale, comment *string
 		var dataLen int
 
 		err = rows.Scan(&colName, &colDefault, &dataType, &dataLen, &dataPrecision,
-			&dataScale, &nullable)
+			&dataScale, &nullable, &comment)
 		if err != nil {
 			return nil, nil, err
 		}
@@ -665,10 +702,28 @@ func (db *oracle) GetColumns(queryer core.Queryer, ctx context.Context, tableNam
 			col.Nullable = false
 		}
 
-		var ignore bool
+		if comment != nil {
+			col.Comment = *comment
+		}
+		if pkName != "" && pkName == col.Name {
+			col.IsPrimaryKey = true
 
-		var dt string
-		var len1, len2 int
+			has, err := db.HasRecords(queryer, ctx, "SELECT * FROM USER_SEQUENCES WHERE SEQUENCE_NAME = :1", seqName(tableName))
+			if err != nil {
+				return nil, nil, err
+			}
+			if has {
+				col.IsAutoIncrement = true
+			}
+
+			fmt.Println("-----", pkName, col.Name, col.IsPrimaryKey)
+		}
+
+		var (
+			ignore     bool
+			dt         string
+			len1, len2 int
+		)
 		dts := strings.Split(*dataType, "(")
 		dt = dts[0]
 		if len(dts) > 1 {
@@ -721,6 +776,10 @@ func (db *oracle) GetColumns(queryer core.Queryer, ctx context.Context, tableNam
 		colSeq = append(colSeq, col.Name)
 	}
 
+	/*select *
+	from user_tab_comments
+	where Table_Name='用户表' */
+
 	return colSeq, cols, nil
 }
 
diff --git a/integrations/engine_test.go b/integrations/engine_test.go
index 0b792b71..646ddcdf 100644
--- a/integrations/engine_test.go
+++ b/integrations/engine_test.go
@@ -60,8 +60,7 @@ func TestAutoTransaction(t *testing.T) {
 	engine.Transaction(func(session *xorm.Session) (interface{}, error) {
 		_, err := session.Insert(TestTx{Msg: "hi"})
 		assert.NoError(t, err)
-
-		return nil, nil
+		return nil, err
 	})
 
 	has, err := engine.Exist(&TestTx{Msg: "hi"})
diff --git a/integrations/tests.go b/integrations/tests.go
index c8219935..a4105257 100644
--- a/integrations/tests.go
+++ b/integrations/tests.go
@@ -146,13 +146,12 @@ func createEngine(dbType, connStr string) error {
 	if err != nil {
 		return err
 	}
-	var tableNames = make([]interface{}, 0, len(tables))
 	for _, table := range tables {
-		tableNames = append(tableNames, table.Name)
-	}
-	if err = testEngine.DropTables(tableNames...); err != nil {
-		return err
+		if err = testEngine.DropTables(table); err != nil {
+			return err
+		}
 	}
+
 	return nil
 }
 
diff --git a/internal/statements/insert.go b/internal/statements/insert.go
index 6cbbbeda..79182a63 100644
--- a/internal/statements/insert.go
+++ b/internal/statements/insert.go
@@ -59,6 +59,10 @@ func (statement *Statement) GenInsertSQL(colNames []string, args []interface{})
 			return "", nil, err
 		}
 
+		if len(table.AutoIncrement) > 0 && statement.dialect.URI().DBType == schemas.ORACLE {
+			colNames = append(colNames, table.AutoIncrement)
+		}
+
 		if err := statement.dialect.Quoter().JoinWrite(buf.Builder, append(colNames, exprs.ColNames...), ","); err != nil {
 			return "", nil, err
 		}
@@ -112,6 +116,16 @@ func (statement *Statement) GenInsertSQL(colNames []string, args []interface{})
 				return "", nil, err
 			}
 
+			// Insert tablename (id) Values(seq_tablename.nextval)
+			if len(table.AutoIncrement) > 0 && statement.dialect.URI().DBType == schemas.ORACLE {
+				if _, err := buf.WriteString(","); err != nil {
+					return "", nil, err
+				}
+				if _, err := buf.WriteString("seq_" + tableName + ".nextval"); err != nil {
+					return "", nil, err
+				}
+			}
+
 			if len(exprs.Args) > 0 {
 				if _, err := buf.WriteString(","); err != nil {
 					return "", nil, err
diff --git a/session_insert.go b/session_insert.go
index 3ec4e93f..ffe47ef7 100644
--- a/session_insert.go
+++ b/session_insert.go
@@ -279,7 +279,9 @@ func (session *Session) innerInsert(bean interface{}) (int64, error) {
 	if err := session.statement.SetRefBean(bean); err != nil {
 		return 0, err
 	}
-	if len(session.statement.TableName()) <= 0 {
+
+	var tableName = session.statement.TableName()
+	if tableName == "" {
 		return 0, ErrTableNotFound
 	}
 
@@ -293,7 +295,6 @@ func (session *Session) innerInsert(bean interface{}) (int64, error) {
 		processor.BeforeInsert()
 	}
 
-	var tableName = session.statement.TableName()
 	table := session.statement.RefTable
 
 	colNames, args, err := session.genInsertColumns(bean)
@@ -355,19 +356,14 @@ func (session *Session) innerInsert(bean interface{}) (int64, error) {
 			}
 		}
 
-		res, err := session.queryBytes("select seq_atable.currval from dual")
+		var id int64
+		err = session.queryRow(fmt.Sprintf("select %s.currval from dual", tableName)).Scan(&id)
 		if err != nil {
-			return 0, err
-		}
-		if len(res) < 1 {
-			return 0, errors.New("insert no error but not returned id")
-		}
-
-		idByte := res[0][table.AutoIncrement]
-		id, err := strconv.ParseInt(string(idByte), 10, 64)
-		if err != nil || id <= 0 {
 			return 1, err
 		}
+		if id == 0 {
+			return 1, errors.New("insert no error but not returned id")
+		}
 
 		aiValue, err := table.AutoIncrColumn().ValueOf(bean)
 		if err != nil {
diff --git a/session_schema.go b/session_schema.go
index 9ccf8abe..7f02e453 100644
--- a/session_schema.go
+++ b/session_schema.go
@@ -131,8 +131,33 @@ func (session *Session) DropTable(beanOrTableName interface{}) error {
 }
 
 func (session *Session) dropTable(beanOrTableName interface{}) error {
-	tableName := session.engine.TableName(beanOrTableName)
-	sqlStr, checkIfExist := session.engine.dialect.DropTableSQL(session.engine.TableName(tableName, true))
+	var tableName, autoIncrementCol string
+	switch beanOrTableName.(type) {
+	case *schemas.Table:
+		table := beanOrTableName.(*schemas.Table)
+		tableName = table.Name
+		if table.AutoIncrColumn() != nil {
+			autoIncrementCol = table.AutoIncrColumn().Name
+		}
+	case string:
+		tableName = beanOrTableName.(string)
+	default:
+		v := utils.ReflectValue(beanOrTableName)
+		table, err := session.engine.tagParser.ParseWithCache(v)
+		if err != nil {
+			return err
+		}
+		if session.statement.AltTableName != "" {
+			tableName = session.statement.AltTableName
+		} else {
+			tableName = table.Name
+		}
+		if table.AutoIncrColumn() != nil {
+			autoIncrementCol = table.AutoIncrColumn().Name
+		}
+	}
+
+	sqlStrs, checkIfExist := session.engine.dialect.DropTableSQL(tableName, autoIncrementCol)
 	if !checkIfExist {
 		exist, err := session.engine.dialect.IsTableExist(session.getQueryer(), session.ctx, tableName)
 		if err != nil {
@@ -142,8 +167,11 @@ func (session *Session) dropTable(beanOrTableName interface{}) error {
 	}
 
 	if checkIfExist {
-		_, err := session.exec(sqlStr)
-		return err
+		for _, sqlStr := range sqlStrs {
+			if _, err := session.exec(sqlStr); err != nil {
+				return err
+			}
+		}
 	}
 	return nil
 }