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#!/usr/local/bin/perl -w |
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|
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# MySQL to PostgreSQL dump file converter |
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# |
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# usage: |
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# mysqldump my_db_name | ./mysql2pgsql | psql pg_db_name |
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# |
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# Convert mysqldump file (from MySQL) to something readable by psql ! |
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|
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# 1999-12-15 DbP -- Dobrica Pavlinusic <dpavlin@linux.hr> |
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# 1999-12-26 DbP don't make serial from auto_increment, create all manually |
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# (to set start value right) |
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# 2000-01-11 DbP now creates sequences with correct value |
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# 2000-04-25 DbP import into CVS (at cvs.linux.hr) |
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|
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use DBI; |
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|
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if (!defined($ARGV[0]) || !defined($ARGV[1])) { |
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print "Usage: $0 name_of_dump pg_database_name\n"; |
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exit 1; |
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} |
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|
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$dump="$ARGV[0]"; |
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$database="$ARGV[1]"; |
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|
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my $dbh = DBI->connect("DBI:Pg:dbname=template1","","") || die $DBI::errstr; |
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$dbh->do("create database $database") || die $dbh->errstr(); |
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$dbh->disconnect; |
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|
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my $dbh = DBI->connect("DBI:Pg:dbname=$database","","") || die $DBI::errstr; |
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|
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|
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$create=0; # inside create table? |
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$table=""; |
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|
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open(DUMP,"$dump") || die "can't open dump file $dump"; |
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|
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while(<DUMP>) { |
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chomp; |
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|
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# nuke comments or empty lines |
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next if (/^#/ || /^$/); |
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|
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if ($create && /^\);/i) { # end of create table squence |
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$create=0; |
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$sql =~ s/,$//g; # strip last , inside create table |
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} |
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|
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if ($create) { # are we inside create table? |
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|
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# FIX: nuke keys |
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next if (/^\s+key/i && !/^\s+primary key/i); |
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|
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# int,auto_increment -> serial |
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if (/int.*auto_increment/i) { |
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|
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# this was simple solution, but squence isn't |
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# initialized correctly so I have to do a work-around |
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# |
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# s/\w*int.*auto_increment/serial/ig; |
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|
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if (/^\s*(\w+)\s+/) { |
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$seq="${table}_${1}_seq"; |
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push @sequences,"$table.$1"; |
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s/(\w+) \w*int.*auto_increment/$1 int4 default nextval('$seq') not null/ig; |
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} else { |
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die "can't get name of field!"; |
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} |
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|
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# int type conversion |
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} elsif (/(\w*)int\(\d+\)/i) { |
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$size=$1; |
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$size =~ tr [A-Z] [a-z]; |
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if ($size eq "tiny" || $size eq "small") { |
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$out = "int2"; |
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} elsif ($size eq "big") { |
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$out = "int8"; |
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} else { |
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$out = "int4"; |
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} |
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s/\w*int\(\d+\)/$out/gc; |
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} |
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|
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# nuke int unsigned |
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s/(int\w+)\s+unsigned/$1/gi; |
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|
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# blob -> text |
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s/\w*blob/text/gi; |
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# tinytext -> text |
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s/tinytext/text/gi; |
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|
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# char -> varchar |
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# PostgreSQL would otherwise pad with spaces as opposed |
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# to MySQL! Your user interface may depend on this! |
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s/\s+char/ varchar/gi; |
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|
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# nuke date representation (not supported in PostgreSQL) |
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s/datetime default '[^']+'/datetime/i; |
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s/date default '[^']+'/datetime/i; |
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s/time default '[^']+'/datetime/i; |
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|
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# change not null datetime field to null valid ones |
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# (to support remapping of "zero time" to null |
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s/datetime not null/datetime/i; |
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|
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# nuke size of timestamp |
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s/timestamp\([^)]*\)/timestamp/i; |
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|
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# double -> float8 |
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s/double\([^)]*\)/float8/i; |
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|
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# add unique to definition of type (MySQL separates this) |
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if (/unique \w+ \((\w+)\)/i) { |
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$sql=~s/($1)([^,]+)/$1$2 unique/i; |
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next; |
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} |
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|
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# quote column names |
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s/(^\s*)(\S+)(\s*)/$1"$2"$3/gi if (!/key/i); |
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|
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} else { # not inside create table |
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|
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#---- fix data in inserted data: (from MS world) |
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# FIX: disabled for now |
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if (00 && /insert into/i) { |
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s!\x96!-!g; # -- |
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s!\x93!"!g; # `` |
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s!\x94!"!g; # '' |
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s!\x85!... !g; # \ldots |
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s!\x92!`!g; |
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} |
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|
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# fix dates '0000-00-00 00:00:00' (should be null) |
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s/'0000-00-00 00:00:00'/null/gi; |
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s/'0000-00-00'/null/gi; |
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s/'00:00:00'/null/gi; |
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s/([12]\d\d\d)([01]\d)([0-3]\d)([0-2]\d)([0-6]\d)([0-6]\d)/'$1-$2-$3 $4:$5:$6'/; |
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} |
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|
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$sql.="$_"; |
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|
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if (/create table/i) { |
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$create++; |
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/create table (\w+)/i; |
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$table=$1 if (defined($1)); |
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} |
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|
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|
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|
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if ($sql=~/\);/) { |
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($dosql,$sql)=split(/\);/,$sql); |
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$dosql.=");"; # nuked by split, put it back! |
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if ("$dosql" ne "") { |
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print STDERR "$dosql\n"; |
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$dbh->do("$dosql") || die "do: '$dosql' ",$dbh->errstr(); |
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} else { |
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print STDERR "empty sql!\n"; |
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} |
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} |
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|
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} |
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#print "creating sequences: @sequences\n"; |
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|
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foreach $seq (@sequences) { |
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($table,$field) = split(/\./,$seq); |
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$sql="select max($field)+1 from $table"; |
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print STDERR "$sql\n"; |
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$sth = $dbh->prepare($sql) || die $dbh->errstr(); |
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$sth->execute() || die $sth->errstr(); |
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($start) = $sth->fetchrow_array() || 1; |
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$seq="${table}_${field}_seq"; |
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$sql="create sequence $seq start $start increment 1"; |
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print STDERR "$sql\n"; |
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$dbh->do("create sequence $seq start $start increment 1") || die $dbh->errstr(); |
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} |
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|
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print "\n"; |
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