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Move TCL interface for sqlite3_release_memory() and sqlite3_soft_heap_limit()

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out of tclsqlite.c and into test1.c.  Update the TCL interface documention
to describe the "exists" method. (CVS 2862)

FossilOrigin-Name: 98194a45cc60cb9942847f773bc797fb5463bd10
This commit is contained in:
drh
2006-01-05 15:50:06 +00:00
parent ad68cb6b69
commit 6aafc29b5f
8 changed files with 143 additions and 90 deletions
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25
www/tclsqlite.tcl
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@ -1,7 +1,7 @@
#
# Run this Tcl script to generate the tclsqlite.html file.
#
set rcsid {$Id: tclsqlite.tcl,v 1.15 2005/09/13 07:00:06 drh Exp $}
set rcsid {$Id: tclsqlite.tcl,v 1.16 2006/01/05 15:50:07 drh Exp $}
source common.tcl
header {The Tcl interface to the SQLite library}
proc METHOD {name text} {
@ -71,6 +71,7 @@ foreach m [lsort {
copy
errorcode
eval
exists
function
last_insert_rowid
nullvalue
@ -418,6 +419,28 @@ return "0" if it wants SQLite to try again to open the database and
should return "1" if it wants SQLite to abandon the current operation.
}
##############################################################################
METHOD exists {
<p>The "exists" method is similar to "onecolumn" and "eval" in that
it executes SQL statements. The difference is that the "exists" method
always returns a boolean value which is TRUE if a query in the SQL
statement it executes returns one or more rows and FALSE if the SQL
returns an empty set.</p>
<p>The "exists" method is often used to test for the existance of
rows in a table. For example:</p>
<blockquote><b>
if {[db exists {SELECT 1 FROM table1 WHERE user=$user}]} {<br>
&nbsp;&nbsp;&nbsp;# Processing if $user exists<br>
} else {<br>
&nbsp;&nbsp;&nbsp;# Processing if $user does not exist<br>
}
</b></blockquote>
}
##############################################################################
METHOD last_insert_rowid {