#!/usr/bin/perl -w
# mysql2pgsql
# MySQL to PostgreSQL dump file converter
#
# For usage: perl mysql2pgsql.perl --help
#
# ddl statments are changed but none or only minimal real data
# formatting are done.
# data consistency is up to the DBA.
#
# (c) 2004-2007 Jose M Duarte and Joseph Speigle ... gborg
#
# (c) 2000-2004 Maxim Rudensky <fonin@omnistaronline.com>
# (c) 2000 Valentine Danilchuk <valdan@ziet.zhitomir.ua>
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
# 3. All advertising materials mentioning features or use of this software
# must display the following acknowledgement:
# This product includes software developed by the Max Rudensky
# and its contributors.
# 4. Neither the name of the author nor the names of its contributors
# may be used to endorse or promote products derived from this software
# without specific prior written permission.
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
use Getopt::Long;
use POSIX;
use strict;
use warnings;
# main sections
# -------------
# 1 variable declarations
# 2 subroutines
# 3 get commandline options and specify help statement
# 4 loop through file and process
# 5. print_plpgsql function prototype
#################################################################
# 1. variable declarations
#################################################################
# command line options
my( $ENC_IN, $ENC_OUT, $PRESERVE_CASE, $HELP, $DEBUG, $SCHEMA, $LOWERCASE, $CHAR2VARCHAR, $NODROP, $SEP_FILE, $opt_debug, $opt_help, $opt_schema, $opt_preserve_case, $opt_char2varchar, $opt_nodrop, $opt_sepfile, $opt_enc_in, $opt_enc_out );
# variables for constructing pre-create-table entities
my $pre_create_sql=''; # comments, 'enum' constraints preceding create table statement
my $auto_increment_seq= ''; # so we can easily substitute it if we need a default value
my $create_sql=''; # all the datatypes in the create table section
my $post_create_sql=''; # create indexes, foreign keys, table comments
my $function_create_sql = ''; # for the set (function,trigger) and CURRENT_TIMESTAMP ( function,trigger )
# constraints
my ($type, $column_valuesStr, @column_values, $value );
my %constraints=(); # holds values constraints used to emulate mysql datatypes (e.g. year, set)
# datatype conversion variables
my ( $index,$seq);
my ( $column_name, $col, $quoted_column);
my ( @year_holder, $year, $constraint_table_name);
my $table=""; # table_name for create sql statements
my $table_no_quotes=""; # table_name for create sql statements
my $sl = '^\s+\w+\s+'; # matches the column name
my $tables_first_timestamp_column= 1; # decision to print warnings about default_timestamp not being in postgres
my $mysql_numeric_datatypes = "TINYINT|SMALLINT|MEDIUMINT|INT|INTEGER|BIGINT|REAL|DOUBLE|FLOAT|DECIMAL|NUMERIC";
my $mysql_datetime_datatypes = "|DATE|TIME|TIMESTAMP|DATETIME|YEAR";
my $mysql_text_datatypes = "CHAR|VARCHAR|BINARY|VARBINARY|TINYBLOB|BLOB|MEDIUMBLOB|LONGBLOB|TINYTEXT|TEXT|MEDIUMTEXT|LONGTEXT|ENUM|SET";
my $mysql_datatypesStr = $mysql_numeric_datatypes . "|". $mysql_datetime_datatypes . "|". $mysql_text_datatypes ;
# handling INSERT INTO statements
my $rowRe = qr{
\( # opening parens
( # (start capture)
(?: # (start group)
' # string start
[^'\\]* # up to string-end or backslash (escape)
(?: # (start group)
\\. # gobble escaped character
[^'\\]* # up to string-end of backslash
)* # (end group, repeat zero or more)
' # string end
| # (OR)
.*? # everything else (not strings)
)* # (end group, repeat zero or more)
) # (end capture)
\) # closing parent
}x;
my ($insert_table, $valueString);
#
########################################################
# 2. subroutines
#
# get_identifier
# print_post_create_sql()
# quote_and_lc()
# make_plpgsql($table,$column_name) -- at end of file
########################################################
# returns an identifier with the given suffix doing controlled
# truncation if necessary
sub get_identifier($$$) {
my ($table, $col, $suffix) = @_;
my $name = '';
$table=~s/\"//g; # make sure that $table doesn't have quotes so we don't end up with redundant quoting
# in the case of multiple columns
my @cols = split(/,/,$col);
$col =~ s/,//g;
# in case all columns together too long we have to truncate them
if (length($col) > 55) {
my $totaltocut = length($col)-55;
my $tocut = ceil($totaltocut / @cols);
@cols = map {substr($_,0,abs(length($_)-$tocut))} @cols;
$col="";
foreach (@cols){
$col.=$_;
}
}
my $max_table_length = 63 - length("_${col}_$suffix");
if (length($table) > $max_table_length) {
$table = substr($table, length($table) - $max_table_length, $max_table_length);
}
return quote_and_lc("${table}_${col}_${suffix}");
}
#
#
# called when we encounter next CREATE TABLE statement
# also called at EOF to print out for last table
# prints comments, indexes, foreign key constraints (the latter 2 possibly to a separate file)
sub print_post_create_sql() {
my ( @create_idx_comments_constraints_commandsArr, $stmts, $table_field_combination);
my %stmts;
# loop to check for duplicates in $post_create_sql
# Needed because of duplicate key declarations ( PRIMARY KEY and KEY), auto_increment columns
@create_idx_comments_constraints_commandsArr = split(';\n?', $post_create_sql);
if ($SEP_FILE) {
open(SEP_FILE, ">>:encoding($ENC_OUT)", $SEP_FILE) or die "Unable to open $SEP_FILE for output: $!\n";
}
foreach (@create_idx_comments_constraints_commandsArr) {
if (m/CREATE INDEX "*(\S+)"*\s/i) { # CREATE INDEX korean_english_wordsize_idx ON korean_english USING btree (wordsize);
$table_field_combination = $1;
# if this particular table_field_combination was already used do not print the statement:
if ($SEP_FILE) {
print SEP_FILE "$_;\n" if !defined($stmts{$table_field_combination});
} else {
print OUT "$_;\n" if !defined($stmts{$table_field_combination});
}
$stmts{$table_field_combination} = 1;
}
elsif (m/COMMENT/i) { # COMMENT ON object IS 'text'; but comment may be part of table name so use 'elsif'
print OUT "$_;\n"
} else { # foreign key constraint or comments (those preceded by -- )
if ($SEP_FILE) {
print SEP_FILE "$_;\n";
} else {
print OUT "$_;\n"
}
}
}
if ($SEP_FILE) {
close SEP_FILE;
}
$post_create_sql='';
# empty %constraints for next " create table" statement
}
# quotes a string or a multicolumn string (comma separated)
# and optionally lowercase (if LOWERCASE is set)
# lowercase .... if user wants default postgres behavior
# quotes .... to preserve keywords and to preserve case when case-sensitive tables are to be used
sub quote_and_lc($)
{
my $col = shift;
if ($LOWERCASE) {
$col = lc($col);
}
if ($col =~ m/,/) {
my @cols = split(/,\s?/, $col);
@cols = map {"\"$_\""} @cols;
return join(', ', @cols);
} else {
return "\"$col\"";
}
}
########################################################
# 3. get commandline options and maybe print help
########################################################
GetOptions("help", "debug"=> \$opt_debug, "schema=s" => \$SCHEMA, "preserve_case" => \$opt_preserve_case, "char2varchar" => \$opt_char2varchar, "nodrop" => \$opt_nodrop, "sepfile=s" => \$opt_sepfile, "enc_in=s" => \$opt_enc_in, "enc_out=s" => \$opt_enc_out );
$HELP = $opt_help || 0;
$DEBUG = $opt_debug || 0;
$PRESERVE_CASE = $opt_preserve_case || 0;
if ($PRESERVE_CASE == 1) { $LOWERCASE = 0; }
else { $LOWERCASE = 1; }
$CHAR2VARCHAR = $opt_char2varchar || 0;
$NODROP = $opt_nodrop || 0;
$SEP_FILE = $opt_sepfile || 0;
$ENC_IN = $opt_enc_in || 'utf8';
$ENC_OUT = $opt_enc_out || 'utf8';
if (($HELP) || ! defined($ARGV[0]) || ! defined($ARGV[1])) {
print "\n\nUsage: perl $0 {--help --debug --preserve_case --char2varchar --nodrop --schema --sepfile --enc_in --enc_out } mysql.sql pg.sql\n";
print "\t* OPTIONS WITHOUT ARGS\n";
print "\t--help: prints this message \n";
print "\t--debug: output the commented-out mysql line above the postgres line in pg.sql \n";
print "\t--preserve_case: prevents automatic case-lowering of column and table names\n";
print "\t\tIf you want to preserve case, you must set this flag. For example,\n";
print "\t\tIf your client application quotes table and column-names and they have cases in them, set this flag\n";
print "\t--char2varchar: converts all char fields to varchar\n";
print "\t--nodrop: strips out DROP TABLE statements\n";
print "\t\totherise harmless warnings are printed by psql when the dropped table does not exist\n";
print "\n\t* OPTIONS WITH ARGS\n";
print "\t--schema: outputs a line into the postgres sql file setting search_path \n";
print "\t--sepfile: output foreign key constraints and indexes to a separate file so that it can be\n";
print "\t\timported after large data set is inserted from another dump file\n";
print "\t--enc_in: encoding of mysql in file (default utf8) \n";
print "\t--enc_out: encoding of postgres out file (default utf8) \n";
print "\n\t* REQUIRED ARGUMENTS\n";
if (defined ($ARGV[0])) {
print "\tmysql.sql ($ARGV[0])\n";
} else {
print "\tmysql.sql (undefined)\n";
}
if (defined ($ARGV[1])) {
print "\tpg.sql ($ARGV[1])\n";
} else {
print "\tpg.sql (undefined)\n";
}
print "\n";
exit 1;
}
########################################################
# 4. process through mysql_dump.sql file
# in a big loop
########################################################
# open in and out files
open(IN,"<:encoding($ENC_IN)", $ARGV[0]) || die "can't open mysql dump file $ARGV[0]";
open(OUT,">:encoding($ENC_OUT)", $ARGV[1]) || die "can't open pg dump file $ARGV[1]";
# output header
print OUT "--\n";
print OUT "-- Generated from mysql2pgsql.perl\n";
print OUT "-- http://gborg.postgresql.org/project/mysql2psql/\n";
print OUT "-- (c) 2001 - 2007 Jose M. Duarte, Joseph Speigle\n";
print OUT "--\n";
print OUT "\n";
print OUT "-- warnings are printed for drop tables if they do not exist\n";
print OUT "-- please see http://archives.postgresql.org/pgsql-novice/2004-10/msg00158.php\n\n";
print OUT "-- ##############################################################\n";
if ($SCHEMA ) {
print OUT "set search_path='" . $SCHEMA . "'\\g\n" ;
}
# loop through mysql file on a per-line basis
while(<IN>) {
############## flow #########################
# (the lines are directed to different string variables at different times)
#
# handle drop table , unlock, connect statements
# if ( start of create table) {
# print out post_create table (indexes, foreign key constraints, comments from previous table)
# add drop table statement if !$NODROP to pre_create_sql
# next;
# }
# else if ( inside create table) {
# add comments in this portion to create_sql
# if ( end of create table) {
# delete mysql-unique CREATE TABLE commands
# print pre_create_sql
# print the constraint tables for set and year datatypes
# print create_sql
# print function_create_sql (this is for the enum columns only)
# next;
# }
# do substitutions
# -- NUMERIC DATATYPES
# -- CHARACTER DATATYPES
# -- DATE AND TIME DATATYPES
# -- KEY AND UNIQUE CREATIONS
# and append them to create_sql
# } else {
# print inserts on-the-spot (this script only changes default timestamp of 0000-00-00)
# }
# LOOP until EOF
#
########################################################
if (!/^\s*insert into/i) { # not inside create table so don't worry about data corruption
s/`//g; # '`pgsql uses no backticks to denote table name (CREATE TABLE `sd`) or around field
# and table names like mysql
# doh! we hope all dashes and special chars are caught by the regular expressions :)
}
if (/^\s*USE\s*([^;]*);/) {
print OUT "\\c ". $1;
next;
}
if (/^(UN)?LOCK TABLES/i || /drop\s+table/i ) {
# skip
# DROP TABLE is added when we see the CREATE TABLE
next;
}
if (/(create\s+table\s+)([-_\w]+)\s/i) { # example: CREATE TABLE `english_english`
print_post_create_sql(); # for last table
$tables_first_timestamp_column= 1; # decision to print warnings about default_timestamp not being in postgres
$create_sql = '';
$table_no_quotes = $2 ;
$table=quote_and_lc($2);
if ( !$NODROP ) { # always print drop table if user doesn't explicitly say not to
# to drop a table that is referenced by a view or a foreign-key constraint of another table,
# CASCADE must be specified. (CASCADE will remove a dependent view entirely, but in the
# in the foreign-key case it will only remove the foreign-key constraint, not the other table entirely.)
# (source: 8.1.3 docs, section "drop table")
warn "table $table will be dropped CASCADE\n";
$pre_create_sql .= "DROP TABLE $table CASCADE\\g\n"; # custom dumps may be missing the 'dump' commands
}
s/(create\s+table\s+)([-_\w]+)\s/$1 $table /i;
if ($DEBUG) {
$create_sql .= '-- ' . $_;
}
$create_sql .= $_;
next;
}
if ($create_sql ne "") { # we are inside create table statement so lets process datatypes
# print out comments or empty lines in context
if ($DEBUG) {
$create_sql .= '-- ' . $_;
}
if (/^#/ || /^$/ || /^\s*--/) {
s/^#/--/; # Two hyphens (--) is the SQL-92 standard indicator for comments
$create_sql.=$_;
next;
}
if (/\).*;/i) { # end of create table squence
s/INSERT METHOD[=\s+][^;\s]+//i;
s/PASSWORD=[^;\s]+//i;
s/ROW_FORMAT=(?:DEFAULT|DYNAMIC|FIXED|COMPRESSED|REDUNDANT|COMPACT)+//i;
s/DELAY KEY WRITE=[^;\s]+//i;
s/INDEX DIRECTORY[=\s+][^;\s]+//i;
s/DATA DIRECTORY=[^;\s]+//i;
s/CONNECTION=[^;\s]+//i;
s/CHECKSUM=[^;\s]+//i;
s/Type=[^;\s]+//i; # ISAM , # older versions
s/COLLATE=[^;\s]+//i; # table's collate
s/COLLATE\s+[^;\s]+//i; # table's collate
# possible AUTO_INCREMENT starting index, it is used in mysql 5.0.26, not sure since which version
if (/AUTO_INCREMENT=(\d+)/i) {
# should take < ---- ) ENGINE=MyISAM AUTO_INCREMENT=16 DEFAULT CHARSET=latin1;
# and should ouput ---> CREATE SEQUENCE "rhm_host_info_id_seq" START WITH 16;
my $start_value = $1;
print $auto_increment_seq . "--\n";
# print $pre_create_sql . "--\n";
$pre_create_sql =~ s/(CREATE SEQUENCE $auto_increment_seq )/$1 START WITH $start_value /;
}
s/AUTO_INCREMENT=\d+//i;
s/PACK_KEYS=\d//i; # mysql 5.0.22
s/DEFAULT CHARSET=[^;\s]+//i; # my mysql version is 4.1.11
s/ENGINE\s*=\s*[^;\s]+//i; # my mysql version is 4.1.11
s/ROW_FORMAT=[^;\s]+//i; # my mysql version is 5.0.22
s/MIN_ROWS=[^;\s]+//i;
s/MAX_ROWS=[^;\s]+//i;
s/AVG_ROW_LENGTH=[^;\s]+//i;
if (/COMMENT='([^']*)'/) { # ) ENGINE=MyISAM DEFAULT CHARSET=utf8 COMMENT='must be country zones';
$post_create_sql.="COMMENT ON TABLE $table IS '$1'\;"; # COMMENT ON table_name IS 'text';
s/COMMENT='[^']*'//i;
}
$create_sql =~ s/,$//g; # strip last , inside create table
# make sure we end in a comma, as KEY statments are turned
# into post_create_sql indices
# they often are the last line so leaving a 'hanging comma'
my @array = split("\n", $create_sql);
for (my $a = $#array; $a >= 0; $a--) { #loop backwards
if ($a == $#array && $array[$a] =~ m/,\s*$/) { # for last line
$array[$a] =~ s/,\s*$//;
next;
}
if ($array[$a] !~ m/create table/i) { # i.e. if there was more than one column in table
if ($a != $#array && $array[$a] !~ m/,\s*$/ ) { # for second to last
$array[$a] =~ s/$/,/;
last;
}
elsif ($a != $#array && $array[$a] =~ m/,\s*$/ ) { # for second to last
last;
}
}
}
$create_sql = join("\n", @array) . "\n";
$create_sql .= $_;
# put comments out first
print OUT $pre_create_sql;
# create separate table to reference and to hold mysql's possible set data-type
# values. do that table's creation before create table
# definition
foreach $column_name (keys %constraints) {
$type=$constraints{$column_name}{'type'};
$column_valuesStr = $constraints{$column_name}{'values'};
$constraint_table_name = get_identifier(${table},${column_name} ,"constraint_table");
if ($type eq 'set') {
print OUT qq~DROP TABLE $constraint_table_name CASCADE\\g\n~ ;
print OUT qq~create table $constraint_table_name ( set_values varchar UNIQUE)\\g\n~ ;
$function_create_sql .= make_plpgsql($table,$column_name);
} elsif ($type eq 'year') {
print OUT qq~DROP TABLE $constraint_table_name CASCADE\\g\n~ ;
print OUT qq~create table $constraint_table_name ( year_values varchar UNIQUE)\\g\n~ ;
}
@column_values = split /,/, $column_valuesStr;
foreach $value (@column_values) {
print OUT qq~insert into $constraint_table_name values ( $value )\\g\n~; # ad ' for ints and varchars
}
}
$create_sql =~ s/double double/double precision/g;
# print create table and reset create table vars
# when moving from each "create table" to "insert" part of dump
print OUT $create_sql;
print OUT $function_create_sql;
$pre_create_sql="";
$auto_increment_seq="";
$create_sql="";
$function_create_sql='';
%constraints=();
# the post_create_sql for this table is output at the beginning of the next table def
# in case we want to make indexes after doing inserting
next;
}
if (/^\s*(\w+)\s+.*COMMENT\s*'([^']*)'/) { #`zone_country_id` int(11) COMMENT 'column comment here',
$quoted_column=quote_and_lc($1);
$post_create_sql.="COMMENT ON COLUMN $table"."."." $quoted_column IS '$2'\;"; # COMMENT ON table_name.column_name IS 'text';
s/COMMENT\s*'[^']*'//i;
}
# NUMERIC DATATYPES
#
# auto_increment -> sequences
# UNSIGNED conversions
# TINYINT
# SMALLINT
# MEDIUMINT
# INT, INTEGER
# BIGINT
#
# DOUBLE [PRECISION], REAL
# DECIMAL(M,D), NUMERIC(M,D)
# FLOAT(p)
# FLOAT
s/(\w*int)\(\d+\)/$1/g; # hack of the (n) stuff for e.g. mediumint(2) int(3)
if (/^(\s*)(\w+)\s*.*numeric.*auto_increment/i) { # int,auto_increment -> serial
$seq = get_identifier($table, $2, 'seq');
$quoted_column=quote_and_lc($2);
# Smash datatype to int8 and autogenerate the sequence.
s/^(\s*)(\w+)\s*.*NUMERIC(.*)auto_increment([^,]*)/$1 $quoted_column serial8 $4/ig;
$create_sql.=$_;
next;
}
if (/^\s*(\w+)\s+.*int.*auto_increment/i) { # example: data_id mediumint(8) unsigned NOT NULL auto_increment,
$seq = get_identifier($table, $1, 'seq');
$quoted_column=quote_and_lc($1);
s/(\s*)(\w+)\s+.*int.*auto_increment([^,]*)/$1 $quoted_column serial8 $3/ig;
$create_sql.=$_;
next;
}
# convert UNSIGNED to CHECK constraints
if (m/^(\s*)(\w+)\s+((float|double precision|double|real|decimal|numeric))(.*)unsigned/i) {
$quoted_column = quote_and_lc($2);
s/^(\s*)(\w+)\s+((float|double precision|double|real|decimal|numeric))(.*)unsigned/$1 $quoted_column $3 $4 CHECK ($quoted_column >= 0)/i;
}
# example: `wordsize` tinyint(3) unsigned default NULL,
if (m/^(\s+)(\w+)\s+(\w+)\s+unsigned/i) {
$quoted_column=quote_and_lc($2);
s/^(\s+)(\w+)\s+(\w+)\s+unsigned/$1 $quoted_column $3 CHECK ($quoted_column >= 0)/i;
}
if (m/^(\s*)(\w+)\s+(bigint.*)unsigned/) {
$quoted_column=quote_and_lc($2);
# see http://archives.postgresql.org/pgsql-general/2005-07/msg01178.php
# and see http://www.postgresql.org/docs/8.2/interactive/datatype-numeric.html
# see http://dev.mysql.com/doc/refman/5.1/en/numeric-types.html max size == 20 digits
s/^(\s*)(\w+)\s+bigint(.*)unsigned/$1 $quoted_column NUMERIC (20,0) CHECK ($quoted_column >= 0)/i;
}
# int type conversion
# TINYINT (signed) -128 to 127 (unsigned) 0 255
# SMALLINT A small integer. The signed range is -32768 to 32767. The unsigned range is 0 to 65535.
# MEDIUMINT A medium-sized integer. The signed range is -8388608 to 8388607. The unsigned range is 0 to 16777215.
# INT A normal-size integer. The signed range is -2147483648 to 2147483647. The unsigned range is 0 to 4294967295.
# BIGINT The signed range is -9223372036854775808 to 9223372036854775807. The unsigned range is 0 to 18446744073709551615
# for postgres see http://www.postgresql.org/docs/8.2/static/datatype-numeric.html#DATATYPE-INT
s/^(\s+"*\w+"*\s+)tinyint/$1 smallint/i;
s/^(\s+"*\w+"*\s+)mediumint/$1 integer/i;
# the floating point types
# double -> double precision
# double(n,m) -> double precision
# float - no need for conversion
# float(n) - no need for conversion
# float(n,m) -> double precision
s/(^\s*\w+\s+)double(\(\d+,\d+\))?/$1float/i;
s/float(\(\d+,\d+\))/float/i;
#
# CHARACTER TYPES
#
# set
# enum
# binary(M), VARBINARy(M), tinyblob, tinytext,
# bit
# char(M), varchar(M)
# blob -> text
# mediumblob
# longblob, longtext
# text -> text
# mediumtext
# longtext
# mysql docs: A BLOB is a binary large object that can hold a variable amount of data.
# set
# For example, a column specified as SET('one', 'two') NOT NULL can have any of these values:
# ''
# 'one'
# 'two'
# 'one,two'
if (/(\w*)\s+set\(((?:['"]\w+['"]\s*,*)+(?:['"]\w+['"])*)\)(.*)$/i) { # example: `au_auth` set('r','w','d') NOT NULL default '',
$column_name = $1;
$constraints{$column_name}{'values'} = $2; # 'abc','def', ...
$constraints{$column_name}{'type'} = "set"; # 'abc','def', ...
$_ = qq~ $column_name varchar , ~;
$column_name = quote_and_lc($1);
$create_sql.=$_;
next;
}
if (/(\S*)\s+enum\(((?:['"][^'"]+['"]\s*,)+['"][^'"]+['"])\)(.*)$/i) { # enum handling
# example: `test` enum('?','+','-') NOT NULL default '?'
# $2 is the values of the enum 'abc','def', ...
$quoted_column=quote_and_lc($1);
# "test" NOT NULL default '?' CONSTRAINT test_test_constraint CHECK ("test" IN ('?','+','-'))
$_ = qq~ $quoted_column varchar CHECK ($quoted_column IN ( $2 ))$3\n~; # just assume varchar?
$create_sql.=$_;
next;
}
# Take care of "binary" option for char and varchar
# (pre-4.1.2, it indicated a byte array; from 4.1.2, indicates
# a binary collation)
s/(?:var)?char(?:\(\d+\))? (?:byte|binary)/text/i;
if (m/(?:var)?binary\s*\(\d+\)/i) { # c varBINARY(3) in Mysql
warn "WARNING in table '$table' '$_': binary type is converted to bytea (unsized) for Postgres\n";
}
s/(?:var)?binary(?:\(\d+\))?/text/i; # c varBINARY(3) in Mysql
s/bit(?:\(\d+\))?/bytea/i; # bit datatype -> bytea
# large datatypes
s/\w*blob/bytea/gi;
s/tinytext/text/gi;
s/mediumtext/text/gi;
s/longtext/text/gi;
# char -> varchar -- if specified as a command line option
# PostgreSQL would otherwise pad with spaces as opposed
# to MySQL! Your user interface may depend on this!
if ($CHAR2VARCHAR) {
s/(^\s+\S+\s+)char/${1}varchar/gi;
}
# nuke column's collate and character set
s/(\S+)\s+character\s+set\s+\w+/$1/gi;
s/(\S+)\s+collate\s+\w+/$1/gi;
#
# DATE AND TIME TYPES
#
# date time
# year
# datetime
# timestamp
# date time
# these are the same types in postgres, just do the replacement of 0000-00-00 date
if (m/default '(\d+)-(\d+)-(\d+)([^']*)'/i) { # we grab the year, month and day
# NOTE: times of 00:00:00 are possible and are okay
my $time = '';
my $year=$1;
my $month= $2;
my $day = $3;
if ($4) {
$time = $4;
}
if ($year eq "0000") { $year = '1970'; }
if ($month eq "00") { $month = '01'; }
if ($day eq "00") { $day = '01'; }
s/default '[^']+'/default '$year-$month-$day$time'/i; # finally we replace with $datetime
}
# convert mysql's year datatype to a constraint
if (/(\w*)\s+year\(4\)(.*)$/i) { # can be integer OR string 1901-2155
$constraint_table_name = get_identifier($table,$1 ,"constraint_table");
$column_name=quote_and_lc($1);
@year_holder = ();
$year='';
for (1901 .. 2155) {
$year = "'$_'";
unless ($year =~ /2155/) { $year .= ','; }
push( @year_holder, $year);
}
$constraints{$column_name}{'values'} = join('','',@year_holder); # '1901','1902', ...
$constraints{$column_name}{'type'} = "year";
$_ = qq~ $column_name varchar CONSTRAINT ${table}_${column_name}_constraint REFERENCES $constraint_table_name ("year_values") $2\n~;
$create_sql.=$_;
next;
} elsif (/(\w*)\s+year\(2\)(.*)$/i) { # same for a 2-integer string
$constraint_table_name = get_identifier($table,$1 ,"constraint_table");
$column_name=quote_and_lc($1);
@year_holder = ();
$year='';
for (1970 .. 2069) {
$year = "'$_'";
if ($year =~ /2069/) { next; }
push( @year_holder, $year);
}
push( @year_holder, '0000');
$constraints{$column_name}{'values'} = join(',',@year_holder); # '1971','1972', ...
$constraints{$column_name}{'type'} = "year"; # 'abc','def', ...
$_ = qq~ $1 varchar CONSTRAINT ${table}_${column_name}_constraint REFERENCES $constraint_table_name ("year_values") $2\n~;
$create_sql.=$_;
next;
}
# datetime
# Default on a dump from MySQL 5.0.22 is in the same form as datetime so let it flow down
# to the timestamp section and deal with it there
s/(${sl})datetime /$1timestamp without time zone /i;
# change not null datetime field to null valid ones
# (to support remapping of "zero time" to null
# s/($sl)datetime not null/$1timestamp without time zone/i;
# timestamps
#
# nuke datetime representation (not supported in PostgreSQL)
# change default time of 0000-00-00 to 1970-01-01
# we may possibly need to create a trigger to provide
# equal functionality with ON UPDATE CURRENT TIMESTAMP
if (m/${sl}timestamp/i) {
if ( m/ON UPDATE CURRENT_TIMESTAMP/i ) { # the ... default CURRENT_TIMESTAMP only applies for blank inserts, not updates
s/ON UPDATE CURRENT_TIMESTAMP//i ;
m/^\s*(\w+)\s+timestamp/i ;
# automatic trigger creation
$table_no_quotes =~ s/"//g;
$function_create_sql .= " CREATE OR REPLACE FUNCTION update_". $table_no_quotes . "() RETURNS trigger AS '
BEGIN
NEW.$1 := CURRENT_TIMESTAMP;
RETURN NEW;
END;
' LANGUAGE 'plpgsql';
-- before INSERT is handled by 'default CURRENT_TIMESTAMP'
CREATE TRIGGER add_current_date_to_".$table_no_quotes." BEFORE UPDATE ON ". $table . " FOR EACH ROW EXECUTE PROCEDURE
update_".$table_no_quotes."();\n";
}
if ($tables_first_timestamp_column && m/DEFAULT NULL/i) {
# DEFAULT NULL is the same as DEFAULT CURRENT_TIMESTAMP for the first TIMESTAMP column. (MYSQL manual)
s/($sl)(timestamp\s+)default null/$1 $2 DEFAULT CURRENT_TIMESTAMP/i;
}
$tables_first_timestamp_column= 0;
if (m/${sl}timestamp\s*\(\d+\)/i) { # fix for timestamps with width spec not handled (ID: 1628)
warn "WARNING for in table '$table' '$_': your default timestamp width is being ignored for table $table \n";
s/($sl)timestamp(?:\(\d+\))/$1datetime/i;
}
} # end timestamp section
# KEY AND UNIQUE CREATIONS
#
# unique
if ( /^\s+unique\s+\(([^(]+)\)/i ) { # example UNIQUE `name` (`name`), same as UNIQUE KEY
# POSTGRESQL: treat same as mysql unique
$quoted_column = quote_and_lc($1);
s/\s+unique\s+\(([^(]+)\)/ unique ($quoted_column) /i;
$create_sql.=$_;
next;
} elsif ( /^\s+unique\s+key\s*(\w+)\s*\(([^(]+)\)/i ) { # example UNIQUE KEY `name` (`name`)
# MYSQL: unique key: allows null=YES, allows duplicates=NO (*)
# ... new ... UNIQUE KEY `unique_fullname` (`fullname`) in my mysql v. Ver 14.12 Distrib 5.1.7-beta
# POSTGRESQL: treat same as mysql unique
# just quote columns
$quoted_column = quote_and_lc($2);
s/\s+unique\s+key\s*(\w+)\s*\(([^(]+)\)/ unique ($quoted_column) /i;
$create_sql.=$_;
# the index corresponding to the 'key' is automatically created
next;
}
# keys
if ( /^\s+fulltext key\s+/i) { # example: FULLTEXT KEY `commenttext` (`commenttext`)
# that is key as a word in the first check for a match
# the tsvector datatype is made for these types of things
# example mysql file:
# what is tsvector datatype?
# http://www.sai.msu.su/~megera/postgres/gist/tsearch/V2/docs/tsearch-V2-intro.html
warn "dba must do fulltext key transformation for $table\n";
next;
}
if ( /^(\s+)constraint (\S+) foreign key \((\S+)\) references (\S+) \((\S+)\)(.*)/i ) {
$quoted_column =quote_and_lc($3);
$col=quote_and_lc($5);
$post_create_sql .= "ALTER TABLE $table ADD FOREIGN KEY ($quoted_column) REFERENCES " . quote_and_lc($4) . " ($col);\n";
next;
}
if ( /^\s*primary key\s*\(([^)]+)\)([,\s]+)/i ) { # example PRIMARY KEY (`name`)
# MYSQL: primary key: allows null=NO , allows duplicates=NO
# POSTGRESQL: When an index is declared unique, multiple table rows with equal indexed values will not be
# allowed. Null values are not considered equal.
# POSTGRESQL quote's source: 8.1.3 docs section 11.5 "unique indexes"
# so, in postgres, we need to add a NOT NULL to the UNIQUE constraint
# and, primary key (mysql) == primary key (postgres) so that we *really* don't need change anything
$quoted_column = quote_and_lc($1);
s/(\s*)primary key\s+\(([^)]+)\)([,\s]+)/$1 primary key ($quoted_column)$3/i;
# indexes are automatically created for unique columns
$create_sql.=$_;
next;
} elsif (m/^\s+key\s[-_\s\w]+\((.+)\)/i ) { # example: KEY `idx_mod_english_def_word` (`word`),
# regular key: allows null=YES, allows duplicates=YES
# MYSQL: KEY is normally a synonym for INDEX. http://dev.mysql.com/doc/refman/5.1/en/create-table.html
#
# * MySQL: ALTER TABLE {$table} ADD KEY $column ($column)
# * PostgreSQL: CREATE INDEX {$table}_$column_idx ON {$table}($column) // Please note the _idx "extension"
# PRIMARY KEY (`postid`),
# KEY `ownerid` (`ownerid`)
# create an index for everything which has a key listed for it.
my $col = $1;
# TODO we don't have a translation for the substring syntax in text columns in MySQL (e.g. "KEY my_idx (mytextcol(20))")
# for now just getting rid of the brackets and numbers (the substring specifier):
$col=~s/\(\d+\)//g;
$quoted_column = quote_and_lc($col);
if ($col =~ m/,/) {
$col = s/,/_/;
}
$index = get_identifier($table, $col, 'idx');
$post_create_sql.="CREATE INDEX $index ON $table USING btree ($quoted_column)\;";
# just create index do not add to create table statement
next;
}
# handle 'key' declared at end of column
if (/\w+.*primary key/i) { # mysql: key is normally just a synonym for index
# just leave as is ( postgres has primary key type)
} elsif (/(\w+\s+(?:$mysql_datatypesStr)\s+.*)key/i) { # mysql: key is normally just a synonym for index
# I can't find a reference for 'key' in a postgres command without using the word 'primary key'
s/$1key/$1/i ;
$index = get_identifier($table, $1, 'idx');
$quoted_column =quote_and_lc($1);
$post_create_sql.="CREATE INDEX $index ON $table USING btree ($quoted_column) \;";
$create_sql.=$_;
}
# do we really need this anymore?
# remap colums with names of existing system attribute
if (/"oid"/i) {
s/"oid"/"_oid"/g;
print STDERR "WARNING: table $table uses column \"oid\" which is renamed to \"_oid\"\nYou should fix application manually! Press return to continue.";
my $wait=<STDIN>;
}
s/oid/_oid/i if (/key/i && /oid/i); # fix oid in key
# FINAL QUOTING OF ALL COLUMNS
# quote column names which were not already quoted
# perhaps they were not quoted because they were not explicitly handled
if (!/^\s*"(\w+)"(\s+)/i) {
/^(\s*)(\w+)(\s+)(.*)$/i ;
$quoted_column= quote_and_lc($2);
s/^(\s*)(\w+)(\s+)(.*)$/$1 $quoted_column $3 $4 /;
}
$create_sql.=$_;
# END of if ($create_sql ne "") i.e. were inside create table statement so processed datatypes
}
# add "not in create table" comments or empty lines to pre_create_sql
elsif (/^#/ || /^$/ || /^\s*--/) {
s/^#/--/; # Two hyphens (--) is the SQL-92 standard indicator for comments
$pre_create_sql .= $_ ; # printed above create table statement
next;
}
elsif (/^\s*insert into/i) { # not inside create table and doing insert
# fix mysql's zero/null value for timestamps
s/'0000-00-00/'1970-01-01/gi;
# commented out to fix bug "Field contents interpreted as a timestamp", what was the point of this line anyway?
#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'/;
#---- fix data in inserted data: (from MS world)
s!\x96!-!g; # --
s!\x93!"!g; # ``
s!\x94!"!g; # ''
s!\x85!... !g; # \ldots
s!\x92!`!g;
print OUT $pre_create_sql; # print comments preceding the insert section
$pre_create_sql="";
$auto_increment_seq = "";
s/'((?:[^'\\]++|\\.)*+)'(?=[),])/E'$1'/g;
# for the E'' see http://www.postgresql.org/docs/8.2/interactive/release-8-1.html
s!\\\\!\\\\\\\\!g; # replace \\ with ]\\\\
# split 'extended' INSERT INTO statements to something PostgreSQL can understand
( $insert_table, $valueString) = $_ =~ m/^INSERT\s+INTO\s+['`"]*(.*?)['`"]*\s+VALUES\s*(.*)/i;
$insert_table = quote_and_lc($insert_table);
s/^INSERT INTO.*?\);//i; # hose the statement which is to be replaced whether a run-on or not
# guarantee table names are quoted
print OUT qq(INSERT INTO $insert_table VALUES $valueString \n);
} else {
print OUT $_ ; # example: /*!40101 SET @OLD_CHARACTER_SET_CLIENT=@@CHARACTER_SET_CLIENT */;
}
# keep looping and get next line of IN file
} # END while(<IN>)
print_post_create_sql(); # in case there is extra from the last table
#################################################################
# 5. print_plgsql function prototype
# emulate the set datatype with the following plpgsql function
# looks ugly so putting at end of file
#################################################################
#
sub make_plpgsql {
my ($table,$column_name) = ($_[0],$_[1]);
$table=~s/\"//g; # make sure that $table doesn't have quotes so we don't end up with redundant quoting
my $constraint_table = get_identifier($table,$column_name ,"constraint_table");
return "
-- this function is called by the insert/update trigger
-- it checks if the INSERT/UPDATE for the 'set' column
-- contains members which comprise a valid mysql set
-- this TRIGGER function therefore acts like a constraint
-- provided limited functionality for mysql's set datatype
-- just verifies and matches for string representations of the set at this point
-- though the set datatype uses bit comparisons, the only supported arguments to our
-- set datatype are VARCHAR arguments
-- to add a member to the set add it to the ".$table."_".$column_name." table
CREATE OR REPLACE FUNCTION check_".$table."_".$column_name."_set( ) RETURNS TRIGGER AS \$\$\n
DECLARE
----
arg_str VARCHAR ;
argx VARCHAR := '';
nobreak INT := 1;
rec_count INT := 0;
psn INT := 0;
str_in VARCHAR := NEW.$column_name;
----
BEGIN
----
IF str_in IS NULL THEN RETURN NEW ; END IF;
arg_str := REGEXP_REPLACE(str_in, '\\',\\'', ','); -- str_in is CONSTANT
arg_str := REGEXP_REPLACE(arg_str, '^\\'', '');
arg_str := REGEXP_REPLACE(arg_str, '\\'\$', '');
-- RAISE NOTICE 'arg_str %',arg_str;
psn := POSITION(',' in arg_str);
IF psn > 0 THEN
psn := psn - 1; -- minus-1 from comma position
-- RAISE NOTICE 'psn %',psn;
argx := SUBSTRING(arg_str FROM 1 FOR psn); -- get one set member
psn := psn + 2; -- go to first starting letter
arg_str := SUBSTRING(arg_str FROM psn); -- hack it off
ELSE
psn := 0; -- minus-1 from comma position
argx := arg_str;
END IF;
-- RAISE NOTICE 'argx %',argx;
-- RAISE NOTICE 'new arg_str: %',arg_str;
WHILE nobreak LOOP
EXECUTE 'SELECT count(*) FROM $constraint_table WHERE set_values = ' || quote_literal(argx) INTO rec_count;
IF rec_count = 0 THEN RAISE EXCEPTION 'one of the set values was not found';
END IF;
IF psn > 0 THEN
psn := psn - 1; -- minus-1 from comma position
-- RAISE NOTICE 'psn %',psn;
argx := SUBSTRING(arg_str FROM 1 FOR psn); -- get one set member
psn := psn + 2; -- go to first starting letter
arg_str := SUBSTRING(arg_str FROM psn); -- hack it off
psn := POSITION(',' in arg_str);
ELSE nobreak = 0;
END IF;
-- RAISE NOTICE 'next argx % and next arg_str %', argx, arg_str;
END LOOP;
RETURN NEW;
----
END;
\$\$ LANGUAGE 'plpgsql' VOLATILE;
drop trigger set_test ON $table;
-- make a trigger for each set field
-- make trigger and hard-code in column names
-- see http://archives.postgresql.org/pgsql-interfaces/2005-02/msg00020.php
CREATE TRIGGER set_test
BEFORE INSERT OR UPDATE ON $table FOR EACH ROW
EXECUTE PROCEDURE check_".$table."_".$column_name."_set();\n";
} # end sub make_plpgsql();