Commit a2fc71d3 authored by monty@donna.mysql.com's avatar monty@donna.mysql.com
Browse files

Fixed bugs in the manual

parent 5218ca2a

Docs/manual.texi

+9 −8
Original line number Diff line number Diff line
@@ -33099,7 +33099,7 @@ simple rename should get your data back. 
@cindex changing, column order

@cindex tables, changing column order

@node Change column order,  , ALTER TABLE problems, Problems

@Section How To Change the Order of Columns in a Table

@section How To Change the Order of Columns in a Table









The whole point of SQL is to abstract the application from the data









storage format.  You should always specify the order in which you wish to








@@ -33118,9 +33118,10 @@ SELECT col_name1, col_name3, col_name2 FROM tbl_name;







will return columns in the order @code{col_name1}, @code{col_name3}, @code{col_name2}.

















You should @strong{NEVER}, in an application, use @code{SELECT *} and









retrieve the columns based on their position, because the order in which columns are









returned @strong{CANNOT} be guaranteed over time. A simple change to









your database may cause your application to fail rather dramatically.









retrieve the columns based on their position, because the order in which









columns are returned @strong{CANNOT} be guaranteed over time. A simple









change to your database may cause your application to fail rather









dramatically.

















If you want to change the order of columns anyway, you can do it as follows:
















@@ -33207,7 +33208,7 @@ you are making a copy of the files in the database directory. If you want to







make a SQL level backup of a table, you can use @code{SELECT INTO OUTFILE}.

















Another way to back up a database is to use the @code{mysqldump} program:









@xref{mysqldump}:









@xref{mysqldump}.

















@enumerate









@item








@@ -33234,7 +33235,7 @@ If you have to restore something, try to recover your tables using







@code{myisamchk -r} first.  That should work in 99.9% of all cases.  If









@code{myisamchk} fails, try the following procedure:









(This will only work if you have started @strong{MySQL} with









@code{--log-update}. @xref{Update log}):









@code{--log-update}. @xref{Update log}.):

















@enumerate









@item








@@ -33471,7 +33472,7 @@ when connecting to the @strong{MySQL} server.















@item









If your are using the @strong{MySQL} perl DBD module you can read the options









from the @strong{MySQL} option files. @xref{Option files}:









from the @strong{MySQL} option files. @xref{Option files}.

















@example









$dsn = "DBI:mysql:test;mysql_read_default_group=client;"








@@ -33731,7 +33732,7 @@ The number of decimals for numeric fields.















The functions available in the C API are listed below and are described in









greater detail in the next section.









@xref{C API functions}:









@xref{C API functions}.

















@multitable @columnfractions .3 .7









@item @strong{mysql_affected_rows()} @tab