Skip to content
体验新版
项目
组织
正在加载...
登录
切换导航
打开侧边栏
Greenplum
Gpdb
提交
c3c39026
G
Gpdb
项目概览
Greenplum
/
Gpdb
通知
7
Star
1
Fork
0
代码
文件
提交
分支
Tags
贡献者
分支图
Diff
Issue
0
列表
看板
标记
里程碑
合并请求
0
DevOps
流水线
流水线任务
计划
Wiki
0
Wiki
分析
仓库
DevOps
项目成员
Pages
G
Gpdb
项目概览
项目概览
详情
发布
仓库
仓库
文件
提交
分支
标签
贡献者
分支图
比较
Issue
0
Issue
0
列表
看板
标记
里程碑
合并请求
0
合并请求
0
Pages
DevOps
DevOps
流水线
流水线任务
计划
分析
分析
仓库分析
DevOps
Wiki
0
Wiki
成员
成员
收起侧边栏
关闭侧边栏
动态
分支图
创建新Issue
流水线任务
提交
Issue看板
体验新版 GitCode,发现更多精彩内容 >>
提交
c3c39026
编写于
5月 31, 2006
作者:
B
Bruce Momjian
浏览文件
操作
浏览文件
下载
电子邮件补丁
差异文件
Support '' for literal ' in psql single-quote strings, documentation update.
上级
eaca1175
变更
2
隐藏空白更改
内联
并排
Showing
2 changed file
with
9 addition
and
6 deletion
+9
-6
doc/src/sgml/ref/psql-ref.sgml
doc/src/sgml/ref/psql-ref.sgml
+5
-5
src/bin/psql/psqlscan.l
src/bin/psql/psqlscan.l
+4
-1
未找到文件。
doc/src/sgml/ref/psql-ref.sgml
浏览文件 @
c3c39026
<!--
$PostgreSQL: pgsql/doc/src/sgml/ref/psql-ref.sgml,v 1.16
2 2006/05/26 19:51:29 tgl
Exp $
$PostgreSQL: pgsql/doc/src/sgml/ref/psql-ref.sgml,v 1.16
3 2006/05/31 11:35:17 momjian
Exp $
PostgreSQL documentation
-->
...
...
@@ -2262,7 +2262,7 @@ testdb=> <userinput>SELECT * FROM :foo;</userinput>
copy the contents of a file into a table column. First load the file into a
variable and then proceed as above.
<programlisting>
testdb=> <userinput>\set content '
\'' `cat my_file.txt` '\
''</userinput>
testdb=> <userinput>\set content '
''' `cat my_file.txt` ''
''</userinput>
testdb=> <userinput>INSERT INTO my_table VALUES (:content);</userinput>
</programlisting>
One possible problem with this approach is that <filename>my_file.txt</filename>
...
...
@@ -2270,14 +2270,14 @@ testdb=> <userinput>INSERT INTO my_table VALUES (:content);</userinput>
they don't cause a syntax error when the second line is processed. This
could be done with the program <command>sed</command>:
<programlisting>
testdb=> <userinput>\set content '
\'' `sed -e "s/'/\\\\\\'/g" < my_file.txt` '\
''</userinput>
testdb=> <userinput>\set content '
''' `sed -e "s/'/\\\\''/g" < my_file.txt` ''
''</userinput>
</programlisting>
Observe the correct number of backslashes (6)! It works
this way: After <application>psql</application> has parsed this
line, it passes <literal>sed -e "s/'/\\
\
'/g" < my_file.txt</literal>
line, it passes <literal>sed -e "s/'/\\
'
'/g" < my_file.txt</literal>
to the shell. The shell will do its own thing inside the double
quotes and execute <command>sed</command> with the arguments
<literal>-e</literal> and <literal>s/'/
\\
'/g</literal>. When
<literal>-e</literal> and <literal>s/'/
'
'/g</literal>. When
<command>sed</command> parses this it will replace the two
backslashes with a single one and then do the substitution. Perhaps
at one point you thought it was great that all Unix commands use the
...
...
src/bin/psql/psqlscan.l
浏览文件 @
c3c39026
...
...
@@ -33,7 +33,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/bin/psql/psqlscan.l,v 1.1
8 2006/05/11 19:15:35 tgl
Exp $
* $PostgreSQL: pgsql/src/bin/psql/psqlscan.l,v 1.1
9 2006/05/31 11:35:17 momjian
Exp $
*
*-------------------------------------------------------------------------
*/
...
...
@@ -861,6 +861,9 @@ other .
{quote} { return LEXRES_OK; }
/* We don't need a state here because we are already in a string */
{xqdouble} { emit("'", 1); }
"\\n" { appendPQExpBufferChar(output_buf, '\n'); }
"\\t" { appendPQExpBufferChar(output_buf, '\t'); }
"\\b" { appendPQExpBufferChar(output_buf, '\b'); }
...
...
编辑
预览
Markdown
is supported
0%
请重试
或
添加新附件
.
添加附件
取消
You are about to add
0
people
to the discussion. Proceed with caution.
先完成此消息的编辑!
取消
想要评论请
注册
或
登录