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New tool to export one test as an SQL file to import on other server.

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Bernhard Fröhlich 2019-01-11 23:51:17 +01:00
parent 964db32cff
commit 927c8e5862
1 changed files with 104 additions and 0 deletions
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#!/usr/bin/perl
#
# Parameters: <t_id of test (topic) to be exported> <Username for DB access> <Password for DB access>
#
# Creates an SQL script to update a test in a database.
# The old test is deleted first, then the updated test is re-inserted.
# The IDs of records which existed before should stay the same.
#
use strict;
use DBI;
use Encode qw(decode encode);
my $TopicID;
my $TopicName;
my $DBUser;
my $DBPass;
my $dbh;
sub CheckArgs() {
my $sth;
my @data;
$dbh = DBI->connect("DBI:mysql:database=cats_db", $ARGV[1], $ARGV[2]);
$sth = $dbh->prepare("SELECT t_id, topic FROM topics WHERE t_id=?");
$sth->execute($ARGV[0]);
@data = $sth->fetchrow_array();
die "Cannot find topic id ".$ARGV[0]."\n" if (!@data || !$data[0]);
$TopicName = encode("UTF-8", decode("cp-1252", $data[1]));
print STDERR "Exporting topic $TopicName...\n";
($TopicID, $DBUser, $DBPass) = @ARGV;
}
#
# Create header and delete statements
#
sub DoHeader() {
print "-- Script to reload t_id $TopicID \"$TopicName\" into a CATS database\n";
print "--\n";
print "/*!40101 SET character_set_client = utf8 */;";
print "-- Delete old test\n";
print "DELETE FROM answers WHERE q_id IN (SELECT q_id FROM questions WHERE t_id=$TopicID);\n";
print "DELETE FROM question_description WHERE q_id IN (SELECT q_id FROM questions WHERE t_id=$TopicID);\n";
print "DELETE FROM questions WHERE t_id=$TopicID;\n";
print "DELETE FROM topics WHERE t_id=$TopicID;\n";
print "--\n\n";
}
sub DoExport($$) {
my ($table, $restriction) = @_;
my $sth;
my @data;
my @type_array;
my $i;
my $Row = 1;
$sth = $dbh->prepare("SELECT * FROM $table WHERE $restriction");
$sth->execute($TopicID);
print "INSERT INTO `$table` VALUES(";
@type_array = @{$sth->{TYPE}};
while(@data = $sth->fetchrow_array()) {
if ($Row>1) {
print ",";
}
for($i=0;$i<scalar(@data);$i++) {
print "," if ($i > 0);
if (!defined($data[$i])) {
print "NULL";
} elsif ($type_array[$i] == 4) {
print $data[$i];
} else {
$data[$i] =~ s/([\\'"])/\\$1/g;
$data[$i] = encode("UTF-8", decode("cp-1252", $data[$i]));
print "'$data[$i]'";
}
}
print ")";
$Row++;
}
print ";\n\n";
}
sub ExportTopic() {
DoExport("topics", "t_id=?");
}
sub ExportQuestions() {
DoExport("questions", "t_id=?");
DoExport("question_description", "q_id IN (SELECT q_id from questions where t_id=?)");
}
sub ExportAnswers() {
DoExport("answers", "q_id IN (SELECT q_id from questions where t_id=?)");
}
CheckArgs();
DoHeader();
ExportTopic();
ExportQuestions();
ExportAnswers();