Commit d45bf758 authored by serg@serg.mysql.com's avatar serg@serg.mysql.com
Browse files

manual cleanups

parent 3b774da4

BitKeeper/etc/logging_ok

+1 −0
Original line number Diff line number Diff line 
Miguel@light.local

serg@serg.mysql.com

Docs/manual.texi

+15 −14
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@@ -30991,7 +30991,8 @@ mysql> select ATAN(-2); 
@end example















@findex ATAN2()













@item ATAN2(Y,X)













@item ATAN(Y,X)













@itemx ATAN2(Y,X)















Returns the arc tangent of the two variables @code{X} and @code{Y}. It is















similar to calculating the arc tangent of @code{Y / X}, except that the















signs of both arguments are used to determine the quadrant of the









@@ -30999,7 +31000,7 @@ result:













@example















mysql> select ATAN(-2,2);















        -> -0.785398













mysql> select ATAN(PI(),0);













mysql> select ATAN2(PI(),0);















        -> 1.570796















@end example
























@@ -32203,6 +32204,18 @@ MySQL will directly use disk-based temporary tables if needed.













MySQL will also, in this case, prefer sorting to doing a















temporary table with a key on the @code{GROUP BY} elements.



























@item













@code{SQL_BUFFER_RESULT} will force the result to be put into a temporary













table. This will help MySQL free the table locks early and will help













in cases where it takes a long time to send the result set to the client.

























@item













@code{SQL_SMALL_RESULT}, a MySQL-specific option, can be used













with @code{GROUP BY} or @code{DISTINCT} to tell the optimizer that the













result set will be small.  In this case, MySQL will use fast













temporary tables to store the resulting table instead of using sorting. In













MySQL Version 3.23 this shouldn't normally be needed.



























@item















@cindex @code{GROUP BY}, extensions to ANSI SQL















If you use @code{GROUP BY}, the output rows will be sorted according to the









@@ -32221,18 +32234,6 @@ If you are not getting the results you expect from your query, please













read the @code{GROUP BY} description.















@xref{Group by functions}.



























@item













@code{SQL_BUFFER_RESULT} will force the result to be put into a temporary













table. This will help MySQL free the table locks early and will help













in cases where it takes a long time to send the result set to the client.

























@item













@code{SQL_SMALL_RESULT}, a MySQL-specific option, can be used













with @code{GROUP BY} or @code{DISTINCT} to tell the optimizer that the













result set will be small.  In this case, MySQL will use fast













temporary tables to store the resulting table instead of using sorting. In













MySQL Version 3.23 this shouldn't normally be needed.



























@item















@code{STRAIGHT_JOIN} forces the optimizer to join the tables in the order in















which they are listed in the @code{FROM} clause. You can use this to speed up