Commit 405f6519 authored by paul@teton.kitebird.com's avatar paul@teton.kitebird.com

Merge paul@work.mysql.com:/home/bk/mysql-4.0

into teton.kitebird.com:/home/paul/mysql-4.0
parents 34998c5a 2b359ed1
......@@ -15157,40 +15157,40 @@ With this option, the
@node LOAD DATA LOCAL, What Privileges, Privileges options, Privilege system
@subsection Security issues with LOAD DATA LOCAL
In MySQL 3.23.49 and MySQL 4.0.2 we added some new options to deal with
In MySQL 3.23.49 and MySQL 4.0.2, we added some new options to deal with
possible security issues when it comes to @code{LOAD DATA LOCAL}.
There are two possible problems with supporting this command:
As the reading of the file is initiated from the server, one could
theoretically create a patched MySQL server that could read any file one
the client machine, for which the current user have read privilege, when
theoretically create a patched MySQL server that could read any file on
the client machine that the current user has read access to, when
the client issues a query against the table.
In a web environment where the clients are connection from a web
server, a user could use @code{LOAD DATA LOCAL} to read any files for
which the web server process have read access to (assuming a user could
In a web environment where the clients are connecting from a web
server, a user could use @code{LOAD DATA LOCAL} to read any files
that the web server process has read access to (assuming a user could
run any command against the SQL server).
There are two separte fixes for this:
There are two separate fixes for this:
If one doesn't configure with @code{--enable-local-infile} then
If you don't configure MySQL with @code{--enable-local-infile}, then
@code{LOAD DATA LOCAL} will be disabled by all clients, unless one
calls @code{mysql_options(... MYSQL_OPT_LOCAL_INFILE, 0)} in the client.
@xref{mysql_options, , @code{mysql_options()}}.
One can enable this command in the @code{mysql} command line client by
specify the option @code{--local-infile[=1]} and disable it with
@code{--local-infile=0}.
For the @code{mysql} command line client, @code{LOAD DATA LOCAL} can be
enabled by specifying the option @code{--local-infile[=1]}, or disabled
with @code{--local-infile=0}.
By default all MySQL clients and libraries are compiled with
By default, all MySQL clients and libraries are compiled with
@code{--enable-local-infile}, to be compatible with MySQL 3.23.48 and
before.
One can disable all @code{LOAD DATA LOCAL} commands in the MySQL server
by starting @code{mysqld} with @code{--local-infile=0}.
In the case of that @code{LOAD DATA INFILE} is disabled in the server or
In the case that @code{LOAD DATA INFILE} is disabled in the server or
the client, you will get the error message (1148):
@example
......@@ -28685,9 +28685,9 @@ This is a synonym for @code{CHAR(1)}.
A variable-length string. @strong{Note:} Trailing spaces are removed when
the value is stored (this differs from the ANSI SQL specification). The range
of @code{M} is 1 to 255 characters. @code{VARCHAR} values are sorted and
compared in case-insensitive fashion unless the @code{BINARY} keyword is
given. @xref{Silent column changes}.
of @code{M} is 0 to 255 characters (1 to 255 prior to MySQL Version 4.0.2).
@code{VARCHAR} values are sorted and compared in case-insensitive fashion
unless the @code{BINARY} keyword is given. @xref{Silent column changes}.
@code{VARCHAR} is a shorthand for @code{CHARACTER VARYING}.
@xref{CHAR}.
......@@ -33544,7 +33544,7 @@ Only the last @code{SELECT} command can have @code{INTO OUTFILE}.
@end itemize
If you don't use the keyword @code{ALL} for the @code{UNION}, all
returned rows will be unique, like if you had done a @code{DISTINCT} for
returned rows will be unique, as if if you had done a @code{DISTINCT} for
the total result set. If you specify @code{ALL}, then you will get all
matching rows from all the used @code{SELECT} statements.
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment