Add support for DROP TABLE IF EXISTS. (CVS 2843)

FossilOrigin-Name: a4c547de83d8b27f06a58f9e530a7c983ec1dc3a

www/lang.tcl

@@ -1,7 +1,7 @@
 #
 # Run this Tcl script to generate the lang-*.html files.
 #
-set rcsid {$Id: lang.tcl,v 1.102 2005/11/14 11:51:46 drh Exp $}
+set rcsid {$Id: lang.tcl,v 1.103 2005/12/29 01:11:37 drh Exp $}
 source common.tcl
 
 if {[llength $argv]>0} {
@@ -875,7 +875,7 @@ will be freed automatically by DROP INDEX.</p>
 Section {DROP TABLE} droptable
 
 Syntax {sql-command} {
-DROP TABLE [<database-name>.] <table-name>
+DROP TABLE [IF EXISTS] [<database-name>.] <table-name>
 }
 
 puts {
@@ -891,6 +891,9 @@ later INSERTs.  To
 remove free space in the database, use the <a href="#vacuum">VACUUM</a> 
 command.  If AUTOVACUUM mode is enabled for a database then space
 will be freed automatically by DROP TABLE.</p>
+
+<p>The optional IF EXISTS clause suppresses the error that would normally
+result if the table does not exist.</p>
 }