powershell - 执行powershell语句后检测错误

Question

我正在使用 powershell 运行 sqlplus并且我希望 PowerShell 在脚本运行后检测是否有错误并执行一些操作，而不是我查看结果文件。

& 'sqlplus' 'system/myOraclePassword' '@Test' | out-file 'result.txt';

通常在DOS中，命令遇到错误时会出现%errorlevel%，不知道PowerShell中是否有类似的东西？

当然，我可以自己阅读日志文件，但有时，事情太常规了，我可能会忘记。

我的Test.sql:

select level from dual
connect by level<5;
select 10/0 from dual;
quit;

显然有一个除以零误差。 result.txt 捕获了它，但我希望 powershell 也检测到它

SQL*Plus: Release 12.1.0.2.0 Production on Thu Apr 27 16:24:30 2017Copyright (c) 1982, 2014, Oracle.  All rights reserved.Last Successful login time: Thu Apr 27 2017 16:17:34 -04:00Connected to:Oracle Database 12c Enterprise Edition Release 12.1.0.2.0 - 64bit ProductionWith the Partitioning, OLAP, Advanced Analytics and Real Application Testing options     LEVEL----------     1     2     3     4select 10/0 from dual         *ERROR at line 1:ORA-01476: divisor is equal to zero

Does the powershell statement return an errorlevel after the statement is executed like DOS?

I have tried:

& 'sqlplus' 'system/myOraclePassword' '@Test' | out-file 'result.txt';
if (errorlevel 1)
{ write-host error;
}
else
{ write-host ok;
}

但这导致了语法错误？

errorlevel : The term 'errorlevel' is not recognized as the name of a cmdlet, function, script file, or operable program. Check the spelling of the name, or if a path was included, verify that the path is correct and try again.

在powershell中检查错误的正确方法是什么？

更新

我用过这个:

if ($LASTEXITCODE -ne 0 )
{ 
write-host error;
}
else
{ 
write-host ok;
}

Answer 1

由于您正在调用一个可执行文件，您可能需要检查 $LASTEXITCODE变量或sqlplus的返回值。在 PowerShell 中，每个变量都有一个 $字首。