[20230417]sqlplus warpped word_warp.txt

[20230417]sqlplus warpped word_warp.txt --//今天调试sql脚本时遇到的情况,设置word_warp 如果前面有空格输出会丢失的情况. --//WARPPED用于折行，WARPPED按指定长度折行，WORD_WARPPED值按照完整字符串折行 --//但是可能遇到奇怪的问题前面的空格不显示的问题.通过例子说明. 1.环境: SCOTT@book> @ ver1 PORT_STRING                    VERSION        BANNER ------------------------------ -------------- -------------------------------------------------------------------------------- x86_64/Linux 2.4.xx            11.2.0.4.0     Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production 2.测试: SCOTT@book> select dname from dept where deptno = 10; DNAME -------------- ACCOUNTING SCOTT@book> column dname format a6 SCOTT@book> select dname from dept where deptno = 10; DNAME ------ ACCOUN TING --//缺省wrapped.出现折行. SCOTT@book> column dname format a6 word_wrap SCOTT@book> select dname from dept where deptno = 10; DNAME ------ ACCOUN TING --//这样看不出来,单词ACCOUNTING有点长!!写成如下: SCOTT@book> select 'hello how are you' dname from dept where deptno = 10; DNAME ------ hello how are you --//基本按照词分隔. SCOTT@book> column dname format a6 wrapped SCOTT@book> select 'hello how are you' dname from dept where deptno = 10; DNAME ------ hello how ar e you --//没有按照词分隔. --//如果开始部分存在空格呢? SCOTT@book> select lpad(' ',10,' ')||dname dname from dept where deptno = 10; DNAME ------     AC COUNTI NG SCOTT@book> column dname format a6 word_wrapped SCOTT@book> select lpad(' ',10,' ')||dname dname from dept where deptno = 10; DNAME ------ ACCOUN TING --//输出丢失前面的空格!!