From 190aab57c068f67b2940f6e75da988ec95e1ed31 Mon Sep 17 00:00:00 2001 From: Brian Quinion Date: Tue, 19 Mar 2013 00:47:57 +0100 Subject: [PATCH] add mysql to pgsql tool as lib --- mysql2pgsql/mysql2pgsql.perl | 949 +++++++++++++++++++++++++++++++++++ 1 file changed, 949 insertions(+) create mode 100755 mysql2pgsql/mysql2pgsql.perl diff --git a/mysql2pgsql/mysql2pgsql.perl b/mysql2pgsql/mysql2pgsql.perl new file mode 100755 index 00000000..e21eff37 --- /dev/null +++ b/mysql2pgsql/mysql2pgsql.perl @@ -0,0 +1,949 @@ +#!/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 +# (c) 2000 Valentine Danilchuk +# 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='" . $SCHEMA . "'\\g\n" ; +} + +# loop through mysql file on a per-line basis +while() { + +############## flow ######################### +# (the lines are directed to different string variables at different times) +# +# handle drop table , unlock, connect statements +# if ( start of create table) { +# print out post_create table (indexes, foreign key constraints, comments from previous table) +# add drop table statement if !$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 $wait=; + } + + s/oid/_oid/i if (/key/i && /oid/i); # fix oid in key + + # FINAL QUOTING OF ALL COLUMNS + # quote column names which were not already quoted + # perhaps they were not quoted because they were not explicitly handled + if (!/^\s*"(\w+)"(\s+)/i) { + /^(\s*)(\w+)(\s+)(.*)$/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 $_ ; # example: /*!40101 SET @OLD_CHARACTER_SET_CLIENT=@@CHARACTER_SET_CLIENT */; +} +# keep looping and get next line of IN file + +} # END while() + +print_post_create_sql(); # in case there is extra from the last table + +################################################################# +# 5. print_plgsql function prototype +# emulate the set datatype with the following plpgsql function +# looks ugly so putting at end of file +################################################################# +# +sub make_plpgsql { +my ($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(); + -- 2.45.1