lazarus链接oracle执行sql出错： illegal variable name/number

下面这句在pl/sql中正常运行：CREATE OR REPLACE TRIGGER MD_1_BI BEFORE INSERT ON MD_1 FOR EACH ROWBEGIN   SELECT GEN_MD_1_ID.NEXTVAL INTO :NEW.ID FROM DUAL;END;但在lazarus开发的程序中执行时出现上面错误提示。修改：ZSQLProcessor1.ParamCheck := false;