#! /usr/bin/perl
#
# based on https://stackoverflow.com/a/87531/5742651
# usage: sqlite3 .dump database_name.sqlite3 | perl sqlite2mysql.pl | mysql -u root -p $import_database_name
#
# ignore follow lines:
# BEGIN TRANSACTION
# COMMIT
# sqlite_sequence
# CREATE UNIQUE INDEX
# PRAGMA foreign_keys=OFF
# "tablename/field" => `tablename/field`
# booleans 't' and 'f' => 1 and 0
# AUTOINCREMENT => AUTO_INCREMENT
# varchar => varchar(255)
# CREATE TABLE table... => DROP TABLE table; CREATE TABLE table...
# Merge insert sqls into multiple insert to speed up
# INSERT INTO table VALUES('val1');
# INSERT INTO table VALUES('val2'); => INSERT INTO table VALUES('val1'), ('val2'), ('val3');
# INSERT INTO table VALUES('val3');
my $open=0;
my $line_cache = '';
# For speed up
print "SET GLOBAL max_allowed_packet=209715200;\n";
#print "SET AUTOCOMMIT=0;\n";
while ($line = <>){
if (($line !~ /PRAGMA foreign_keys=OFF/) && ($line !~ /BEGIN TRANSACTION/) && ($line !~ /COMMIT/) && ($line !~ /sqlite_sequence/) && ($line !~ /CREATE UNIQUE INDEX/)){
if ($line =~ /CREATE TABLE \"([a-z_0-9]*)\"(.*)/){
$name = "\`$1\`";
$sub = $2;
$sub =~ s/varchar([^(])/varchar(255)$1/g;
$line = "DROP TABLE IF EXISTS $name;\nCREATE TABLE $name$sub\n";
}
elsif ($line =~ /CREATE VIEW ([a-z_0-9]*)(.*)/){
$name = "\`$1\`";
$sub = $2;
$line = "DROP VIEW IF EXISTS $name;\nCREATE VIEW $name$sub\n";
}
elsif ($line =~ /INSERT INTO \"([a-z_]*)\" VALUES(.*);/){
if ($open == 0) {
$open = 1;
$line_cache .= "INSERT INTO \`$1\` VALUES $2";
} else {
$line_cache .= ", $2";
}
next;
}else{
$line =~ s/\'\'/\\\'/g;
}
if ($open == 1) {
$open = 0;
$line = $line_cache.";\n".$line;
$line_cache = '';
}
$line =~ s/\"/`/g;
$line =~ s/([^\\'])\'t\'(.)/$1THIS_IS_TRUE$2/g;
$line =~ s/THIS_IS_TRUE/1/g;
$line =~ s/([^\\'])\'f\'(.)/$1THIS_IS_FALSE$2/g;
$line =~ s/THIS_IS_FALSE/0/g;
$line =~ s/AUTOINCREMENT/AUTO_INCREMENT/g;
print $line;
}
}
#print "SET AUTOCOMMIT=1;\n";
