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|
#!/usr/local/bin/perl
# $Id: example.oldstyle,v 1.6 1998/09/27 19:12:35 mergl Exp $
######################### globals
$| = 1;
use Pg;
$dbmain = 'template1';
$dbname = 'pgperltest';
$trace = '/tmp/pgtrace.out';
$DEBUG = 0; # set this to 1 for traces
######################### the following functions will be tested
# PQsetdb()
# PQdb()
# PQuser()
# PQport()
# PQstatus()
# PQfinish()
# PQerrorMessage()
# PQtrace()
# PQuntrace()
# PQexec()
# PQconsumeInput
# PQgetline()
# PQputline()
# PQendcopy()
# PQresultStatus()
# PQntuples()
# PQnfields()
# PQfname()
# PQfnumber()
# PQftype()
# PQfsize()
# PQcmdStatus()
# PQoidStatus()
# PQcmdTuples()
# PQgetvalue()
# PQclear()
# PQprint()
# PQnotifies()
# PQlo_import()
# PQlo_export()
# PQlo_unlink()
######################### the following functions will not be tested
# PQconnectdb()
# PQconndefaults()
# PQsetdbLogin()
# PQreset()
# PQrequestCancel()
# PQpass()
# PQhost()
# PQtty()
# PQoptions()
# PQsocket()
# PQbackendPID()
# PQsendQuery()
# PQgetResult()
# PQisBusy()
# PQgetlineAsync()
# PQputnbytes()
# PQmakeEmptyPGresult()
# PQfmod()
# PQgetlength()
# PQgetisnull()
# PQdisplayTuples()
# PQprintTuples()
# PQlo_open()
# PQlo_close()
# PQlo_read()
# PQlo_write()
# PQlo_creat()
# PQlo_lseek()
# PQlo_tell()
######################### handles error condition
$SIG{PIPE} = sub { print "broken pipe\n" };
######################### create and connect to test database
$conn = PQsetdb('', '', '', '', $dbmain);
die PQerrorMessage($conn) unless PGRES_CONNECTION_OK eq PQstatus($conn);
print "connected to $dbmain\n";
# do not complain when dropping $dbname
$result = PQexec($conn, "DROP DATABASE $dbname");
PQclear($result);
$result = PQexec($conn, "CREATE DATABASE $dbname");
die PQerrorMessage($conn) unless PGRES_COMMAND_OK eq PQresultStatus($result);
print "created database $dbname\n";
PQclear($result);
PQfinish($conn);
$conn = PQsetdb('', '', '', '', $dbname);
die PQerrorMessage($conn) unless PGRES_CONNECTION_OK eq PQstatus($conn);
print "connected to $dbname\n";
######################### debug, PQtrace
if ($DEBUG) {
open(TRACE, ">$trace") || die "can not open $trace: $!";
PQtrace($conn, TRACE);
print "enabled tracing into $trace\n";
}
######################### check PGconn
$db = PQdb($conn);
print " database: $db\n";
$user = PQuser($conn);
print " user: $user\n";
$port = PQport($conn);
print " port: $port\n";
######################### create and insert into table
$result = PQexec($conn, "CREATE TABLE person (id int4, name char(16))");
die PQerrorMessage($conn) unless PGRES_COMMAND_OK eq PQresultStatus($result);
print "created table, status = ", PQcmdStatus($result), "\n";
PQclear($result);
for ($i = 1; $i <= 5; $i++) {
$result = PQexec($conn, "INSERT INTO person VALUES ($i, 'Edmund Mergl')");
die PQerrorMessage($conn) unless PGRES_COMMAND_OK eq PQresultStatus($result);
PQclear($result);
}
print "insert into table, last oid = ", PQoidStatus($result), "\n";
######################### copy to stdout, PQgetline
$result = PQexec($conn, "COPY person TO STDOUT");
die PQerrorMessage($conn) unless PGRES_COPY_OUT eq PQresultStatus($result);
print "copy table to STDOUT:\n";
PQclear($result);
$ret = 0;
$i = 1;
while (-1 != $ret) {
$ret = PQgetline($conn, $string, 256);
last if $string eq "\\.";
print " ", $string, "\n";
$i++;
}
die PQerrorMessage($conn) unless 0 == PQendcopy($conn);
######################### delete and copy from stdin, PQputline
$result = PQexec($conn, "BEGIN");
die PQerrorMessage($conn) unless PGRES_COMMAND_OK eq PQresultStatus($result);
PQclear($result);
$result = PQexec($conn, "DELETE FROM person");
die PQerrorMessage($conn) unless PGRES_COMMAND_OK eq PQresultStatus($result);
print "delete from table, command status = ", PQcmdStatus($result), ", no. of tuples = ", PQcmdTuples($result), "\n";
PQclear($result);
$result = PQexec($conn, "COPY person FROM STDIN");
die PQerrorMessage($conn) unless PGRES_COPY_IN eq PQresultStatus($result);
print "copy table from STDIN:\n";
PQclear($result);
for ($i = 1; $i <= 5; $i++) {
# watch the tabs and do not forget the newlines
PQputline($conn, "$i Edmund Mergl\n");
}
PQputline($conn, "\\.\n");
die PQerrorMessage($conn) unless 0 == PQendcopy($conn);
$result = PQexec($conn, "END");
die PQerrorMessage($conn) unless PGRES_COMMAND_OK eq PQresultStatus($result);
PQclear($result);
######################### select from person, PQgetvalue
$result = PQexec($conn, "SELECT * FROM person");
die PQerrorMessage($conn) unless PGRES_TUPLES_OK eq PQresultStatus($result);
print "select from table:\n";
for ($k = 0; $k < PQnfields($result); $k++) {
print " field = ", $k, "\tfname = ", PQfname($result, $k), "\tftype = ", PQftype($result, $k), "\tfsize = ", PQfsize($result, $k), "\tfnumber = ", PQfnumber($result, PQfname($result, $k)), "\n";
}
for ($k = 0; $k < PQntuples($result); $k++) {
for ($l = 0; $l < PQnfields($result); $l++) {
print " ", PQgetvalue($result, $k, $l);
}
print "\n";
}
PQclear($result);
######################### PQnotifies
if (! defined($pid = fork)) {
die "can not fork: $!";
} elsif (! $pid) {
# I'm the child
sleep 2;
$conn = PQsetdb('', '', '', '', $dbname);
$result = PQexec($conn, "NOTIFY person");
PQclear($result);
PQfinish($conn);
exit;
}
$result = PQexec($conn, "LISTEN person");
die PQerrorMessage($conn) unless PGRES_COMMAND_OK eq PQresultStatus($result);
print "listen table: status = ", PQcmdStatus($result), "\n";
PQclear($result);
while (1) {
PQconsumeInput($conn);
($table, $pid) = PQnotifies($conn);
last if $pid;
}
print "got notification: table = ", $table, " pid = ", $pid, "\n";
######################### PQprint
$result = PQexec($conn, "SELECT * FROM person");
die PQerrorMessage($conn) unless PGRES_TUPLES_OK eq PQresultStatus($result);
print "select from table and print:\n";
PQprint(STDOUT, $result, 0, 0, 0, 0, 0, 0, " ", "", "", "");
PQclear($result);
######################### PQlo_import, PQlo_export, PQlo_unlink
$lobject_in = '/tmp/gaga.in';
$lobject_out = '/tmp/gaga.out';
$data = "testing large objects using lo_import and lo_export";
open(FD, ">$lobject_in") or die "can not open $lobject_in";
print(FD $data);
close(FD);
$result = PQexec($conn, "BEGIN");
die PQerrorMessage($conn) unless PGRES_COMMAND_OK eq PQresultStatus($result);
PQclear($result);
$lobjOid = PQlo_import($conn, "$lobject_in") or die PQerrorMessage($conn);
print "importing file as large object, Oid = ", $lobjOid, "\n";
die PQerrorMessage($conn) unless 1 == PQlo_export($conn, $lobjOid, "$lobject_out");
print "exporting large object as temporary file\n";
$result = PQexec($conn, "END");
die PQerrorMessage($conn) unless PGRES_COMMAND_OK eq PQresultStatus($result);
PQclear($result);
print "comparing imported file with exported file: ";
print "not " unless (-s "$lobject_in" == -s "$lobject_out");
print "ok\n";
die PQerrorMessage($conn) if -1 == PQlo_unlink($conn, $lobjOid);
unlink $lobject_in;
unlink $lobject_out;
print "unlink large object\n";
######################### debug, PQuntrace
if ($DEBUG) {
close(TRACE) || die "bad TRACE: $!";
PQuntrace($conn);
print "tracing disabled\n";
}
######################### disconnect and drop test database
PQfinish($conn);
$conn = PQsetdb('', '', '', '', $dbmain);
die PQerrorMessage($conn) unless PGRES_CONNECTION_OK eq PQstatus($conn);
print "connected to $dbmain\n";
$result = PQexec($conn, "DROP DATABASE $dbname");
die PQerrorMessage($conn) unless PGRES_COMMAND_OK eq PQresultStatus($result);
print "drop database\n";
PQclear($result);
PQfinish($conn);
######################### EOF
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