public Alter Table Add Unique

src/main/java/de/kreth/dbmanager/DbManager.java

@@ -107,6 +107,14 @@ public class DbManager {
 		}
 	}
 
+	public static String createUniqueConstraint(TableDefinition def, UniqueConstraint constraint) {
+		StringBuilder sql = new StringBuilder("ALTER TABLE ");
+		sql.append(def.getTableName()).append(" ADD CONSTRAINT UNIQUE_").append(String.join("_", constraint.getNames()))
+				.append(" UNIQUE (");
+		sql.append(String.join(", ", constraint.getNames())).append(")");
+		return sql.toString();
+	}
+
 	public static String createSqlStatement(TableDefinition def) {
 		assert (def != null);