diff options
| -rw-r--r-- | doc/src/sgml/client-auth.sgml | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/doc/src/sgml/client-auth.sgml b/doc/src/sgml/client-auth.sgml index 3e7a9efd8cc..dd82e8af0d7 100644 --- a/doc/src/sgml/client-auth.sgml +++ b/doc/src/sgml/client-auth.sgml @@ -838,8 +838,9 @@ local db1,db2,@demodbs all md5 the remainder of the field is treated as a regular expression. (See <xref linkend="posix-syntax-details"/> for details of <productname>PostgreSQL</productname>'s regular expression syntax.) The regular - expression can include a single capture, or parenthesized subexpression, - which can then be referenced in the <replaceable>database-username</replaceable> + expression can include a single capture, or parenthesized subexpression. + The portion of the system user name that matched the capture can then + be referenced in the <replaceable>database-username</replaceable> field as <literal>\1</literal> (backslash-one). This allows the mapping of multiple user names in a single line, which is particularly useful for simple syntax substitutions. For example, these entries |