[英]Maximum length of command line argument that can be passed to SQL*Plus?
I am calling SQL*Plus from Linux C Shell:我从 Linux C Shell 调用 SQL*Plus:
sqlplus username/password @file.sql var1 var2 var3
If I pass a string as var1
, how long can this string be?如果我将一个字符串作为var1
传递,这个字符串可以有多长?
Is it governed by the OS?它是由操作系统管理的吗? In this case:在这种情况下:
Linux version 2.6.9-100.ELsmp (mockbuild@x86-010.build.bos.redhat.com) (gcc version 3.4.6 20060404 (Red Hat 3.4.6-11)) #1 SMP Tue Feb 1 12:17:32 EST 2011
Update: Empirical testing yielded the following results:更新:实证测试产生以下结果:
I think I'll use sqlldr
to overcome this.我想我会使用sqlldr
来克服这个问题。
Try with: xargs --show-limits </dev/null
尝试使用: xargs --show-limits </dev/null
Your environment variables take up 2446 bytes
POSIX upper limit on argument length (this system): 2092658
POSIX smallest allowable upper limit on argument length (all systems): 4096
Maximum length of command we could actually use: 2090212
Size of command buffer we are actually using: 131072
There is no limit per argument, but a total for the whole command line length.每个参数没有限制,而是整个命令行长度的总数。 In my system (Fedora 15/zsh) its closer to 2Mb.在我的系统 (Fedora 15/zsh) 中,它更接近 2Mb。 (line 4). (第 4 行)。
I came across "How long an argument list your kernel can take on the command line before it chokes?":我遇到了“您的内核在窒息之前可以在命令行上使用多长时间的参数列表?”:
getconf ARG_MAX
which gives the following on my system:这在我的系统上给出了以下内容:
131072
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