Commit 59e0e7fc authored by unknown's avatar unknown

manual.texi fix typos, grammar in LOAD DATA LOCAL section

manual.texi	minor tweaks
manual.texi	VARCHAR(0) is legal now.


Docs/manual.texi:
  fix typos, grammar in LOAD DATA LOCAL section
parent 576530f7
...@@ -15157,40 +15157,40 @@ With this option, the ...@@ -15157,40 +15157,40 @@ With this option, the
@node LOAD DATA LOCAL, What Privileges, Privileges options, Privilege system @node LOAD DATA LOCAL, What Privileges, Privileges options, Privilege system
@subsection Security issues with LOAD DATA LOCAL @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}. possible security issues when it comes to @code{LOAD DATA LOCAL}.
There are two possible problems with supporting this command: There are two possible problems with supporting this command:
As the reading of the file is initiated from the server, one could 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 theoretically create a patched MySQL server that could read any file on
the client machine, for which the current user have read privilege, when the client machine that the current user has read access to, when
the client issues a query against the table. the client issues a query against the table.
In a web environment where the clients are connection from a web 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 for server, a user could use @code{LOAD DATA LOCAL} to read any files
which the web server process have read access to (assuming a user could that the web server process has read access to (assuming a user could
run any command against the SQL server). 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 @code{LOAD DATA LOCAL} will be disabled by all clients, unless one
calls @code{mysql_options(... MYSQL_OPT_LOCAL_INFILE, 0)} in the client. calls @code{mysql_options(... MYSQL_OPT_LOCAL_INFILE, 0)} in the client.
@xref{mysql_options, , @code{mysql_options()}}. @xref{mysql_options, , @code{mysql_options()}}.
One can enable this command in the @code{mysql} command line client by For the @code{mysql} command line client, @code{LOAD DATA LOCAL} can be
specify the option @code{--local-infile[=1]} and disable it with enabled by specifying the option @code{--local-infile[=1]}, or disabled
@code{--local-infile=0}. 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 @code{--enable-local-infile}, to be compatible with MySQL 3.23.48 and
before. before.
One can disable all @code{LOAD DATA LOCAL} commands in the MySQL server One can disable all @code{LOAD DATA LOCAL} commands in the MySQL server
by starting @code{mysqld} with @code{--local-infile=0}. 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): the client, you will get the error message (1148):
@example @example
...@@ -28685,9 +28685,9 @@ This is a synonym for @code{CHAR(1)}. ...@@ -28685,9 +28685,9 @@ This is a synonym for @code{CHAR(1)}.
A variable-length string. @strong{Note:} Trailing spaces are removed when A variable-length string. @strong{Note:} Trailing spaces are removed when
the value is stored (this differs from the ANSI SQL specification). The range 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 of @code{M} is 0 to 255 characters (1 to 255 prior to MySQL Version 4.0.2).
compared in case-insensitive fashion unless the @code{BINARY} keyword is @code{VARCHAR} values are sorted and compared in case-insensitive fashion
given. @xref{Silent column changes}. unless the @code{BINARY} keyword is given. @xref{Silent column changes}.
@code{VARCHAR} is a shorthand for @code{CHARACTER VARYING}. @code{VARCHAR} is a shorthand for @code{CHARACTER VARYING}.
@xref{CHAR}. @xref{CHAR}.
...@@ -33544,7 +33544,7 @@ Only the last @code{SELECT} command can have @code{INTO OUTFILE}. ...@@ -33544,7 +33544,7 @@ Only the last @code{SELECT} command can have @code{INTO OUTFILE}.
@end itemize @end itemize
If you don't use the keyword @code{ALL} for the @code{UNION}, all 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 the total result set. If you specify @code{ALL}, then you will get all
matching rows from all the used @code{SELECT} statements. matching rows from all the used @code{SELECT} statements.
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