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Re: MySQL and Perl - Shorthand

by George_Sherston (Vicar)
on Sep 21, 2002 at 12:42 UTC ( #199742=note: print w/ replies, xml ) Need Help??


in reply to MySQL and Perl - Shorthand

dws is quite right. I agree, one gets bored typing in all that stuff. I have a few subroutines in a local module that I use with pretty much anything I write:

package GS::DBIUtilities; require Exporter; @ISA = ("Exporter"); use DBI; my $module_dbh; sub GetDBH { #-------------------------------------------------------------- # Connect to the amt db and return a db #-------------------------------------------------------------- my $db = shift; $module_dbh = DBI->connect("DBI:mysql:database=$db", "xxxxx", "xxx +xx"); return $module_dbh; } sub DropDBH { #--------------------------------------------------------------- # Disconnect from DB #--------------------------------------------------------------- $module_dbh->disconnect if $module_dbh; } sub InsertMultipleValues { #--------------------------------------------------------------- # Inserts contents of a hashref into the db table specified #--------------------------------------------------------------- my $dbh = shift; my $table = shift; my $Inserts = shift; my @cols = keys %$Inserts; my @vals = @$Inserts{@cols}; my $cols = join ',', @cols; my $places = '?,' x @vals; chop $places; my $sth = $dbh->prepare("INSERT INTO $table ($cols) VALUES ($place +s)") or die $dbh->errstr; $sth->execute(@vals) or die "$dbh->errstr : $table"; } sub ReplaceMultipleValues { #--------------------------------------------------------------- # Replaces contents of a hashref into the db table specified #--------------------------------------------------------------- my $dbh = shift; my $table = shift; my $Replaces = shift; my @cols = keys %$Replaces; my @vals = @$Replaces{@cols}; my $cols = join ',', @cols; my $places = '?,' x @vals; chop $places; my $sth = $dbh->prepare("REPLACE INTO $table ($cols) VALUES ($plac +es)") or die $dbh->errstr; $sth->execute(@vals) or die $dbh->errstr; } sub FetchSingleItem { #--------------------------------------------------------------- # Fetch a single item from a database #--------------------------------------------------------------- my $dbh = shift; my $FetchCol = shift; my $table = shift; my $SearchCol = shift; my $SearchVal = shift; my $sth = $dbh->prepare("SELECT $FetchCol FROM $table WHERE $Searc +hCol = ? LIMIT 1") or die $dbh->errstr; $sth->execute($SearchVal); my @ref = $sth->fetchrow_array; return $ref[0]; } sub InsertAndGetID { #--------------------------------------------------------------- # inserts an entry into a db and gets the auto_increment ID #--------------------------------------------------------------- my $dbh = shift; my $table = shift; my $Inserts = shift; my $IDCol = shift; $Inserts->{$IDCol} = 'NULL'; $dbh->do("LOCK TABLES $table WRITE") or die $dbh->errstr; InsertMultipleValues($dbh,$table,$Inserts); $sth = $dbh->prepare("SELECT LAST_INSERT_ID() FROM $table") or die + $dbh->errstr; $sth->execute or die $dbh->errstr; my @ary = $sth->fetchrow_array or die $dbh->errstr; $dbh->do("UNLOCK TABLES") or die $dbh->errstr; $sth->finish; return $ary[0]; } sub FetchStar { #--------------------------------------------------------------- # Retrieves the whole of each row that matches the submitted # criteria. Returns a hashref if there is only one row, # otherwise a ref to an array of hashes. #--------------------------------------------------------------- my $dbh = shift; my $table = shift; my $SearchCol = shift; my $SearchVal = shift; my $sth = $dbh->prepare("SELECT * FROM $table WHERE $SearchCol = ? +") or die $dbh->errstr; $sth->execute($SearchVal); my @returns; while (my $ref = $sth->fetchrow_hashref) { push @returns, $ref; } if (@returns <= 1) { return $returns[0]; } else { return \@returns; } } @EXPORT = qw/ GetDBH DropDBH InsertMultipleValues ReplaceMultipleValues FetchStar FetchSingleItem InsertAndGetID /; 1;#


George Sherston


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