[英]Too many command-line arguments when calling pg_dump from java
After running into an issue on executing some queries as strings in Java for postgres, I went using string arrays, which solved my existing issues. 在遇到问题后,我使用Java中的字符串以Postgres的字符串形式执行一些查询后,我开始使用字符串数组,这解决了我现有的问题。
After the switch I am now having an issue with pg_dump
, but not with pg_restore
. 切换之后,我现在遇到了
pg_dump
的问题,但是没有遇到pg_restore
。
When I supply my method with the following array: 当我为我的方法提供以下数组时:
[time, ./pg_dump, -U, lehigh, -d, lehigh, -Fc, data/completedDb.dump]
I get the following error: 我收到以下错误:
pg_dump: too many command-line arguments (first is "data/completedDb.dump")
pg_dump:命令行参数过多(第一个是“ data / completedDb.dump”)
ProcessBuilder produces the following for my execution: ProcessBuilder产生以下内容供我执行:
time ./pg_dump -U lehigh -d lehigh -Fc data/completedDb.dump
And it works fine when I add the output arrow, and remove the data folder, on the command line. 当我在命令行上添加输出箭头并删除数据文件夹时,它工作正常。
time ./pg_dump -U lehigh -d lehigh -Fc > completedDb.dump
I'm running this through eclipse, in Java on a postgres database, using : 我正在使用Eclipse在Postgres数据库上的Java中通过Eclipse运行此操作:
Runtime.getRuntime().exec();
I've tried using Process.start()
but got the same errors, so I'm totally dumbfounded at what I'm doing wrong. 我尝试使用
Process.start()
但遇到了相同的错误,所以我对自己做错的事情完全傻眼了。
Prior to this change, pg_dump
was being executed properly as a single string. 在进行此更改之前,
pg_dump
已作为单个字符串正确执行。 I don't want to go back to that method as I want to maintain consistency, but I also want to figure out what I'm doing wrong here. 我不想回到那种方法,因为我想保持一致性,但是我也想弄清楚我在做什么错。
You should use -f before the output file name, since by default pg_dump outputs to stdout. 您应该在输出文件名之前使用-f,因为默认情况下pg_dump输出到stdout。
Try 尝试
[time, ./pg_dump, -U, lehigh, -d, lehigh, -Fc, -f, data/completedDb.dump] [时间,。/ pg_dump,-U,lehigh,-d,lehigh,-Fc,-f,data / completedDb.dump]
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