dialects/dialect.go

@@ -133,6 +133,10 @@ func (db *Base) CreateTableSQL(ctx context.Context, queryer core.Queryer, table
 
 	for i, colName := range table.ColumnsSeq() {
 		col := table.GetColumn(colName)
+		if !col.Creatable() { // ignore <- tag column
+			continue
+		}
+
 		s, _ := ColumnString(db.dialect, col, col.IsPrimaryKey && len(table.PrimaryKeys) == 1, false)
 		b.WriteString(s)
 

dialects/mssql.go

@@ -650,6 +650,9 @@ func (db *mssql) CreateTableSQL(ctx context.Context, queryer core.Queryer, table
 
 	for i, colName := range table.ColumnsSeq() {
 		col := table.GetColumn(colName)
+		if !col.Creatable() { // ignore <- tag column
+			continue
+		}
 		s, _ := ColumnString(db.dialect, col, col.IsPrimaryKey && len(table.PrimaryKeys) == 1, true)
 		b.WriteString(s)
 

dialects/mysql.go

@@ -661,6 +661,10 @@ func (db *mysql) CreateTableSQL(ctx context.Context, queryer core.Queryer, table
 
 	for i, colName := range table.ColumnsSeq() {
 		col := table.GetColumn(colName)
+		if !col.Creatable() { // ignore <- tag column
+			continue
+		}
+
 		s, _ := ColumnString(db.dialect, col, col.IsPrimaryKey && len(table.PrimaryKeys) == 1, true)
 		b.WriteString(s)
 

dialects/oracle.go

@@ -625,6 +625,9 @@ func (db *oracle) CreateTableSQL(ctx context.Context, queryer core.Queryer, tabl
 
 	for _, colName := range table.ColumnsSeq() {
 		col := table.GetColumn(colName)
+		if !col.Creatable() { // ignore <- tag column
+			continue
+		}
 		/*if col.IsPrimaryKey && len(pkList) == 1 {
 			sql += col.String(b.dialect)
 		} else {*/

schemas/column.go

@@ -75,6 +75,11 @@ func NewColumn(name, fieldName string, sqlType SQLType, len1, len2 int64, nullab
 	}
 }
 
+// Creatable returns true if the column needs to be created when sync
+func (col *Column) Creatable() bool {
+	return col.MapType != ONLYFROMDB
+}
+
 // ValueOf returns column's filed of struct's value
 func (col *Column) ValueOf(bean interface{}) (*reflect.Value, error) {
 	dataStruct := reflect.Indirect(reflect.ValueOf(bean))