Add other mysql conversion utility for comparisons.
This commit is contained in:
Bruce Momjian
parent
8814d1b2e7
commit
890bbf2770
820
contrib/mysql/my2pg.pl
Executable file
820
contrib/mysql/my2pg.pl
Executable file
@ -0,0 +1,820 @@
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#!/usr/bin/perl5
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#
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# My2Pg: MySQL to PostgreSQL dump conversion utility
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#
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# (c) 2000,2001 Maxim Rudensky <fonin@ziet.zhitomir.ua>
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# (c) 2000 Valentine Danilchuk <valdan@ziet.zhitomir.ua>
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# All right reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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# 3. All advertising materials mentioning features or use of this software
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# must display the following acknowledgement:
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# This product includes software developed by the Max Rudensky
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# and its contributors.
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# 4. Neither the name of the author nor the names of its contributors
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# may be used to endorse or promote products derived from this software
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# without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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# SUCH DAMAGE.
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#
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# $Id: my2pg.pl,v 1.1 2001/02/10 11:43:12 momjian Exp $
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# TODO:
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# + Handle SETs
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# - LIKE implementation
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# - memory use optimisation in SET_output function
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# - raw integer values as input values must be OK
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# - Use autoconf & automake to auto-build makefiles
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#
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# $Log: my2pg.pl,v $
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# Revision 1.1 2001/02/10 11:43:12 momjian
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# Add other mysql conversion utility for comparisons.
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#
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# Revision 1.15 2001/01/30 10:13:36 fonin
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# Re-released under BSD-like license.
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#
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# Revision 1.14 2000/12/18 20:55:13 fonin
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# Better -n implementation.
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#
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# Revision 1.13 2000/12/18 15:26:33 fonin
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# Added command-line options. -n forces *CHAR DEFAULT '' NOT NULL to be converted to *CHAR NULL.\nAUTO_INCREMENT fields converted not in SERIAL but in INT* NOT NULL DEFAULT nextval('seqname').\nDocumentation refreshed.\nDump enclosed in single transaction from now.
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#
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# Revision 1.12 2000/12/14 20:57:15 fonin
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# Doublequotation bug fixed (in CREATE INDEX ON TABLE (field1,field2))
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#
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# Revision 1.10 2000/11/27 14:18:22 fonin
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# Fixed bug - occasionaly was broken CREATE SEQUENCE generation
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#
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# Revision 1.8 2000/11/24 15:24:16 fonin
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# TIMESTAMP fix: MySQL output YYYYMMDDmmhhss to YYYYMMDD mmhhss
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#
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# Revision 1.7 2000/11/22 23:04:41 fonin
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# TIMESTAMP field fix. Better doublequoting. Splitting output dump
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# into 2 transactions - create/load/indexing first, sequence setvals then.
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# Added POD documentation.
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#
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#
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use Getopt::Std;
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my %opts; # command line options
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my $chareg=''; # CHAR conversion regexps
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# parse command line
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getopts('nh',\%opts);
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# output syntax
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if($opts{h} ne '') {
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usage();
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exit;
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}
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# convert CHAR types from NOT NULL DEFAULT '' to NULL
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if($opts{n} ne '') {
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$chareg='\s*?(default\s*?\'\')*?\s*?not\s*?null';
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}
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$|=1;
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print("------------------------------------------------------------------");
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print("\n-- My2Pg \$Revision: 1.1 $ \translated dump");
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print("\n--");
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print("\n------------------------------------------------------------------");
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print("\n\nBEGIN;\n\n\n");
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my %index; # contains array of CREATE INDEX for each table
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my %seq; # contains CREATE SEQUENCE for each table
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my %primary; # contains primary (eg SERIAL) fields for each table
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my %identifier; # contains generated by this program identifiers
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my $j=-1; # current position in $index{table}
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my @check; # CHECK constraint for current
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# generating full path to libtypes.c
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my $libtypesource='libtypes.c';
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my $libtypename=`pwd`;
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chomp($libtypename);
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$libtypename.='/libtypes.so';
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# push header to libtypes.c
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open(LIBTYPES,">$libtypesource");
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print LIBTYPES "/******************************************************";
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print LIBTYPES "\n * My2Pg \$Revision: 1.1 $ \translated dump";
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print LIBTYPES "\n * User types definitions";
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print LIBTYPES "\n ******************************************************/";
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print LIBTYPES "\n\n#include <postgres.h>\n";
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print LIBTYPES "\n#define ADD_COMMA if(strcmp(result,\"\")!=0) strcat(result,\",\")\n";
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# reading STDIN...
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while (<>) {
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# Comments start with -- in SQL
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if(!/insert into.*\(.*#.*\)/i) {
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s/#/--/;
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}
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# Convert numeric types
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s/tinyint\(\d+\)/INT2/i;
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s/smallint\(\d+\)/INT2/i;
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s/mediumint\(\d+\)/INT4/i;
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s/bigint\(\d+\)/INT8/i;
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s/int\(\d+\)/INT4/i;
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s/float(\(\d+,\d*\))/DECIMAL$1/i;
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s/double precision/FLOAT8/i;
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s/([\W])double(\(\d+,\d*\))/$1DECIMAL$2/i;
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s/([\W])double[\W]/$1FLOAT8/i;
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s/([\W])real[\W]/$1FLOAT8/i;
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s/([\W])real(\(\d+,\d*\))/$1DECIMAL$2/i;
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# Convert string types
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s/\w*blob$chareg/text/i;
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s/mediumtext$chareg/text/i;
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s/tinytext$chareg/text/i;
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s/(.*?char\(.*?\))$chareg/$1/i;
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# Convert DATE types
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s/datetime/TIMESTAMP/;
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s/timestamp\(\d+\)/TIMESTAMP/i;
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# Change all AUTO_INCREMENT fields to SERIAL ones with a pre-defined sequence
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if(/([\w\d]+)\sint.*auto_increment/i) {
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$tmpseq=new_name("$table_name"."_"."$+"."_SEQ",28);
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$seq{$table_name}=$tmpseq;
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$primary{$table_name}=$+;
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s/(int.*?)DEFAULT\s*?'.*?'(.*?)AUTO_INCREMENT/$1$2DEFAULT nextval\('$tmpseq'\)/i;
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}
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# Fix timestamps
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s/0000-00-00/0001-01-01/g;
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# may work wrong !!!
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s/00000000000000/00010101000000/g;
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s/(\d{8})(\d{6})/'$1 $2'/g;
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#<Hackzone> ---------------------------------------------------
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# convert UNSIGNED to CHECK constraints
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if(/^\s+?([\w\d_]+).*?unsigned/i) {
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$check.=",\n CHECK (\"$1\">=0)";
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}
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s/unsigned//i;
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# Limited ENUM support - little heuristic
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s/enum\('N','Y'\)/BOOL/i;
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s/enum\('Y','N'\)/BOOL/i;
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# ENUM support
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if(/^\s+?([\w\d_]+).*?enum\((.*?)\)/i) {
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my $enumlist=$2;
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my @item;
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$item[0]='';
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while($enumlist=~s/'([\d\w_]+)'//i) {
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$item[++$#item]=$1;
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}
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# forming identifier name
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$typename=new_name('enum_'.$table_name.'_'.$item[1],28);
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# $typename=lc('enum_'.$table_name.'_'.$item[1]);
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# creating input type function
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my $func_in="
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int2* $typename"."_in (char *str) {
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int2* result;
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if(str==NULL)
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return NULL;
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result=(int2*)palloc(sizeof(int2));
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*result=-1;";
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for(my $i=0;$i<=$#item;$i++) {
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$func_in.="
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if(strcmp(str,\"$item[$i]\")==0) {
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*result=$i;
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}";
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}
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$func_in.="
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if(*result == -1) {
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elog(ERROR,\"$typename"."_in: incorrect input value\");
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return NULL;
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}
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return (result);
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}\n";
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$types.="\n---";
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$types.="\n--- Types for table ".uc($table_name);
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$types.="\n---\n";
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print LIBTYPES "\n/*";
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print LIBTYPES "\n * Types for table ".uc($table_name);
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print LIBTYPES "\n */\n";
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$types.="\nCREATE FUNCTION $typename"."_in (opaque)
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RETURNS $typename
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AS '$libtypename'
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LANGUAGE 'c'
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WITH (ISCACHABLE);\n";
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# creating output function
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my $func_out="
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char* $typename"."_out (int2 *outvalue) {
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char* result;
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if(outvalue==NULL)
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return NULL;
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result=(char*)palloc(10);
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switch (*outvalue) {";
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for(my $i=0;$i<=$#item;$i++) {
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$func_out.="
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case $i:
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strcpy(result,\"$item[$i]\");
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break;";
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}
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$func_out.="
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default :
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elog(ERROR,\"$typename"."_out: incorrect stored value\");
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return NULL;
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break;
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}
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return result;
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}\n";
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$func_out.="\nbool $typename"."_eq(int2* a, int2* b) {
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return (*a==*b);
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}
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bool $typename"."_ne(int2* a, int2* b) {
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return (*a!=*b);
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}
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bool $typename"."_lt(int2* a, int2* b) {
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return (*a<*b);
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}
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bool $typename"."_le(int2* a, int2* b) {
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return (*a<=*b);
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}
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bool $typename"."_gt(int2* a, int2* b) {
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return (*a>*b);
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}
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bool $typename"."_ge(int2* a, int2* b) {
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return (*a>=*b);
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}\n";
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$types.="\nCREATE FUNCTION $typename"."_out (opaque)
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RETURNS opaque
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AS '$libtypename'
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LANGUAGE 'c'
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WITH (ISCACHABLE);\n";
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$types.="\nCREATE TYPE $typename (
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internallength = 2,
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input = $typename\_in,
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output = $typename\_out
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);\n";
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$types.="\nCREATE FUNCTION $typename"."_eq ($typename,$typename)
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RETURNS bool
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AS '$libtypename'
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LANGUAGE 'c';
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CREATE FUNCTION $typename"."_lt ($typename,$typename)
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RETURNS bool
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AS '$libtypename'
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LANGUAGE 'c';
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CREATE FUNCTION $typename"."_le ($typename,$typename)
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RETURNS bool
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AS '$libtypename'
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LANGUAGE 'c';
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CREATE FUNCTION $typename"."_gt ($typename,$typename)
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RETURNS bool
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AS '$libtypename'
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LANGUAGE 'c';
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CREATE FUNCTION $typename"."_ge ($typename,$typename)
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RETURNS bool
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AS '$libtypename'
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LANGUAGE 'c';
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CREATE FUNCTION $typename"."_ne ($typename,$typename)
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RETURNS bool
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AS '$libtypename'
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LANGUAGE 'c';
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CREATE OPERATOR < (
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leftarg = $typename,
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rightarg = $typename,
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-- negator = >=,
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procedure = $typename"."_lt
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);
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CREATE OPERATOR <= (
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leftarg = $typename,
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rightarg = $typename,
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-- negator = >,
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procedure = $typename"."_le
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);
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CREATE OPERATOR = (
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leftarg = $typename,
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rightarg = $typename,
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commutator = =,
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-- negator = <>,
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procedure = $typename"."_eq
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);
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CREATE OPERATOR >= (
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leftarg = $typename,
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rightarg = $typename,
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negator = <,
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procedure = $typename"."_ge
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);
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CREATE OPERATOR > (
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leftarg = $typename,
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rightarg = $typename,
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negator = <=,
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procedure = $typename"."_gt
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);
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CREATE OPERATOR <> (
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leftarg = $typename,
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rightarg = $typename,
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negator = =,
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procedure = $typename"."_ne
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);\n";
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print LIBTYPES $func_in;
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print LIBTYPES $func_out;
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s/enum\(.*?\)/$typename/i;
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}
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# SET support
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if(/^\s+?([\w\d_]+).*?set\((.*?)\)/i) {
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my $setlist=$2;
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my @item;
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$item[0]='';
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my $maxlen=0; # maximal string length
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while($setlist=~s/'([\d\w_]+)'//i) {
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$item[++$#item]=$1;
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$maxlen+=length($item[$#item])+1;
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}
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$maxlen+=1;
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my $typesize=int($#item/8);
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if($typesize<2) {
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$typesize=2;
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}
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$internalsize=$typesize;
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$typesize='int'.$typesize;
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# $typename=lc('set_'.$table_name.'_'.$item[1]);
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$typename=new_name('set_'.$table_name.'_'.$item[1],28);
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# creating input type function
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my $func_in="
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$typesize* $typename"."_in (char *str) {
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$typesize* result;
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char* token;
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if(str==NULL)
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return NULL;
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result=($typesize*)palloc(sizeof($typesize));
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*result=0;
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if(strcmp(str,\"\")==0)
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return result;
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for(token=strtok(str,\",\");token!=NULL;token=strtok(NULL,\",\")) {";
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for(my $i=0,my $j=1;$i<=$#item;$i++,$j*=2) {
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$func_in.="
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if(strcmp(token,\"$item[$i]\")==0) {
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*result|=$j;
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continue;
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}";
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}
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$func_in.="
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}
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if(*result == 0) {
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elog(ERROR,\"$typename"."_in: incorrect input value\");
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return NULL;
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}
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return (result);
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}\n";
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$types.="\n---";
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$types.="\n--- Types for table ".uc($table_name);
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$types.="\n---\n";
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print LIBTYPES "\n/*";
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print LIBTYPES "\n * Types for table ".uc($table_name);
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print LIBTYPES "\n */\n";
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$types.="\nCREATE FUNCTION $typename"."_in (opaque)
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RETURNS $typename
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AS '$libtypename'
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LANGUAGE 'c';\n";
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# creating output function
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my $func_out="
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char* $typename"."_out ($typesize *outvalue) {
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char* result;
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int i;
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if(outvalue==NULL)
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return NULL;
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result=(char*)palloc($maxlen);
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strcpy(result,\"\");
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for(i=1;i<=2 << (sizeof(int2)*8);i*=2) {
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switch (*outvalue & i) {";
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for(my $i=0,$j=1;$i<=$#item;$i++,$j*=2) {
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$func_out.="
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case $j:";
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if($item[$i] ne '') {
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$func_out.="ADD_COMMA;";
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}
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$func_out.="strcat(result,\"$item[$i]\");
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break;";
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}
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$func_out.="
|
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default :
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break;
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}
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}
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||||
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return result;
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}\n";
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$func_out.="\nbool $typename"."_eq($typesize* a, $typesize* b) {
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return (*a==*b);
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}
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$typesize find_in_set($typesize *a, $typesize *b) {
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int i;
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||||
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for(i=1;i<=sizeof($typesize)*8;i*=2) {
|
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if(*a & *b) {
|
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return 1;
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||||
}
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}
|
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return 0;
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||||
}
|
||||
|
||||
\n";
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||||
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||||
$types.="\nCREATE FUNCTION $typename"."_out (opaque)
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RETURNS opaque
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AS '$libtypename'
|
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LANGUAGE 'c';\n";
|
||||
|
||||
$types.="\nCREATE TYPE $typename (
|
||||
internallength = $internalsize,
|
||||
input = $typename\_in,
|
||||
output = $typename\_out
|
||||
);\n";
|
||||
|
||||
$types.="\nCREATE FUNCTION $typename"."_eq ($typename,$typename)
|
||||
RETURNS bool
|
||||
AS '$libtypename'
|
||||
LANGUAGE 'c';
|
||||
|
||||
CREATE FUNCTION find_in_set ($typename,$typename)
|
||||
RETURNS bool
|
||||
AS '$libtypename'
|
||||
LANGUAGE 'c';
|
||||
|
||||
CREATE OPERATOR = (
|
||||
leftarg = $typename,
|
||||
rightarg = $typename,
|
||||
commutator = =,
|
||||
procedure = $typename"."_eq
|
||||
);
|
||||
|
||||
CREATE OPERATOR <> (
|
||||
leftarg = $typename,
|
||||
rightarg = $typename,
|
||||
commutator = <>,
|
||||
negator = =,
|
||||
procedure = $typename"."_eq
|
||||
);
|
||||
|
||||
\n";
|
||||
|
||||
print LIBTYPES $func_in;
|
||||
print LIBTYPES $func_out;
|
||||
s/set\(.*?\)/$typename/i;
|
||||
}
|
||||
|
||||
# Change multy-field keys to multi-field indices
|
||||
# MySQL Dump usually ends the CREATE TABLE statement like this:
|
||||
# CREATE TABLE bids (
|
||||
# ...
|
||||
# PRIMARY KEY (bids_id),
|
||||
# KEY offer_id (offer_id,user_id,the_time),
|
||||
# KEY bid_value (bid_value)
|
||||
# );
|
||||
# We want to replace this with smth like
|
||||
# CREATE TABLE bids (
|
||||
# ...
|
||||
# PRIMARY KEY (bids_id),
|
||||
# );
|
||||
# CREATE INDEX offer_id ON bids (offer_id,user_id,the_time);
|
||||
# CREATE INDEX bid_value ON bids (bid_value);
|
||||
if (s/CREATE TABLE (.*) /CREATE TABLE "$1" /i) {
|
||||
if($oldtable ne $table_name) {
|
||||
$oldtable=$table_name;
|
||||
$j=-1;
|
||||
$check='';
|
||||
print $types;
|
||||
$types='';
|
||||
$dump=~s/,\n\);/\n\);/gmi;
|
||||
print $dump;
|
||||
$dump='';
|
||||
}
|
||||
$table_name=$1;
|
||||
}
|
||||
|
||||
# output CHECK constraints instead UNSIGNED modifiers
|
||||
if(/PRIMARY KEY \((.*)\)/i) {
|
||||
my $tmpfld=$1;
|
||||
$tmpfld=~s/,/","/;
|
||||
s/PRIMARY KEY (\(.*\))/PRIMARY KEY \("$tmpfld"\)/i;
|
||||
s/(PRIMARY KEY \(.*\)).*/$1$check\n/i;
|
||||
}
|
||||
|
||||
if(/^\s*KEY (.+) \((.*)\).*/i) {
|
||||
my $tmpfld=$2;
|
||||
$tmpfld=~s/\s*,\s*/","/;
|
||||
$index{$table_name}[++$j]="CREATE INDEX $1_$table_name\_index ON \"$table_name\" (\"$tmpfld\");";
|
||||
}
|
||||
if(/^\s*UNIQUE (.+) \((.*)\).*/i) {
|
||||
my $tmpfld=$2;
|
||||
$tmpfld=~s/,/","/;
|
||||
$index{$table_name}[++$j]="CREATE UNIQUE INDEX $1_$table_name\_index ON \"$table_name\" (\"$tmpfld\");";
|
||||
}
|
||||
s/^\s*UNIQUE (.+) (\(.*\)).*\n//i;
|
||||
s/^\s*KEY (.+) (\(.*\)).*\n//i;
|
||||
|
||||
if(!s/INSERT INTO\s+?(.*?)\s+?/INSERT INTO "$1" /i) {
|
||||
# Quote lowercase identifiers in double quotes
|
||||
while(!/^--/ && s/\s([A-Za-z_\d]+[a-z][A-Za-z_\d]*)\s/ "$+" /) {;}
|
||||
}
|
||||
|
||||
|
||||
#</Hackzone> --------------------------------------------------
|
||||
$dump.=$_;
|
||||
}
|
||||
|
||||
print $types;
|
||||
$dump=~s/,\n\);/\n\);/gmi;
|
||||
print $dump;
|
||||
|
||||
# Output indices for tables
|
||||
while(my($table,$ind)=each(%index)) {
|
||||
print "\n\n--";
|
||||
print "\n-- Indexes for table ".uc($table);
|
||||
print "\n--\n";
|
||||
for(my $i=0;$i<=$#{$ind};$i++) {
|
||||
print "\n$ind->[$i]";
|
||||
}
|
||||
|
||||
}
|
||||
print("\n\nEND;\n");
|
||||
print("\nBEGIN;\n");
|
||||
|
||||
while(my($table,$s)=each(%seq)) {
|
||||
print "\n\n--";
|
||||
print "\n-- Sequences for table ".uc($table);
|
||||
print "\n--\n";
|
||||
|
||||
# setting SERIAL sequence values right
|
||||
if($primary{$table} ne '') {
|
||||
print "\nCREATE SEQUENCE ".$seq{$table}.";";
|
||||
print "\nSELECT SETVAL('".$seq{$table}."',(select case when max(\"".$primary{$table}."\")>0 then max(\"".$primary{$table}."\")+1 else 1 end from \"$table\"));";
|
||||
}
|
||||
}
|
||||
|
||||
print("\n\nEND;\n");
|
||||
close(LIBTYPES);
|
||||
|
||||
open(MAKE,">Makefile");
|
||||
print MAKE "#
|
||||
# My2Pg \$Revision: 1.1 $ \translated dump
|
||||
# Makefile
|
||||
#
|
||||
|
||||
all: libtypes.so
|
||||
|
||||
libtypes.o: libtypes.c
|
||||
gcc -c -fPIC -g -O libtypes.c
|
||||
libtypes.so: libtypes.o
|
||||
ld -Bshareable -o libtypes.so libtypes.o";
|
||||
close(MAKE);
|
||||
|
||||
#
|
||||
# Function generates unique identifier
|
||||
# Args : template name, max length
|
||||
# Globals: %identifier
|
||||
#
|
||||
sub new_name() {
|
||||
my $name=lc(shift @_);
|
||||
my $len=shift @_;
|
||||
|
||||
# truncate long names
|
||||
if(length($name)>$len) {
|
||||
$name=~s/(.{$len}).*/$1/i;
|
||||
}
|
||||
|
||||
# find reserved identifiers
|
||||
if($identifier{$name}!=1) {
|
||||
$identifier{$name}=1;
|
||||
return $name;
|
||||
}
|
||||
else {
|
||||
for(my $i=1,my $tmpname=$name.$i;$identifier{$tmpname}!=1;) {
|
||||
$tmpname=$name.$i
|
||||
}
|
||||
$identifier{$tmpname}=1;
|
||||
return $tmpname;
|
||||
}
|
||||
|
||||
die "Error during unique identifier generation :-(";
|
||||
}
|
||||
|
||||
sub usage() {
|
||||
print <<EOF
|
||||
my2pg - MySQL to PostgreSQL database dump converter
|
||||
|
||||
Copyright (c) 2000 Max Rudensky <fonin\@ziet.zhitomir.ua>
|
||||
Copyright (c) 2000 Valentine Danilchuk <valdan\@ziet.zhitomir.ua>
|
||||
|
||||
This program is distributed in the hope that it will be useful,
|
||||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
|
||||
|
||||
SYNTAX:
|
||||
my2pg [-hn]
|
||||
|
||||
OPTIONS:
|
||||
h - this help
|
||||
n - convert *CHAR NOT NULL DEFAULT '' types to *CHAR NULL
|
||||
EOF
|
||||
;
|
||||
}
|
||||
|
||||
|
||||
=head1 NAME
|
||||
|
||||
my2pg - MySQL -> PostgreSQL dump conversion utility.
|
||||
|
||||
=head1 SYNTAX
|
||||
|
||||
mysqldump db | ./my2pg.pl [-n] > pgsqldump.txt
|
||||
vi libtypes.c
|
||||
make
|
||||
psql database < pgsqldump.txt
|
||||
where
|
||||
|
||||
=over 4
|
||||
|
||||
=item B<mysqldump.txt>
|
||||
|
||||
- mysqldump utility output,
|
||||
|
||||
=item B<pgsqldump.txt>
|
||||
|
||||
- file suitable for loading into PostgreSQL.
|
||||
|
||||
=item B<libtypes.c>
|
||||
|
||||
- C source for emulated MySQL types (ENUM, SET) generated by B<my2pg>
|
||||
|
||||
=back
|
||||
|
||||
=head1 OVERVIEW
|
||||
|
||||
B<my2pg> utility attempts to convert MySQL database dump to Postgres's one.
|
||||
B<my2pg> performs such conversions:
|
||||
|
||||
=over 4
|
||||
|
||||
=item Type conversion.
|
||||
|
||||
It tries to find proper Postgres
|
||||
type for each column.
|
||||
Unknown types are silently pushing to output dump;
|
||||
ENUM and SET types implemented via user types
|
||||
(C source for such types can be found in
|
||||
B<libtypes.c> file);
|
||||
|
||||
=item Identifiers double-quotation.
|
||||
|
||||
All column and table
|
||||
names should be enclosed to double-quotes to prevent
|
||||
interferension with reserved words;
|
||||
|
||||
=item Converting
|
||||
|
||||
KEY(field) to CREATE INDEX i_field on table (field);
|
||||
|
||||
=item The same
|
||||
|
||||
for UNIQUE keys;
|
||||
|
||||
=item Indices
|
||||
|
||||
are creating AFTER rows insertion (to speed up the load);
|
||||
|
||||
=item Translates '#'
|
||||
|
||||
MySQL comments to ANSI SQL '--'
|
||||
|
||||
=back
|
||||
|
||||
It encloses dump in transaction block to prevent single errors
|
||||
during data load.
|
||||
|
||||
=head1 COMMAND-LINE OPTIONS
|
||||
|
||||
My2pg takes the following command-line options:
|
||||
|
||||
=over 2
|
||||
|
||||
=item -n
|
||||
|
||||
Convert *CHAR DEFAULT '' NOT NULL types to *CHAR NULL.
|
||||
Postgres can't load empty '' strings in NOT NULL fields.
|
||||
|
||||
=item -h
|
||||
|
||||
Show usage banner.
|
||||
|
||||
=back
|
||||
|
||||
=head1 SIDE EFFECTS
|
||||
|
||||
=over 4
|
||||
|
||||
=item creates
|
||||
|
||||
file B<libtypes.c> in current directory
|
||||
overwriting existed file without any checks;
|
||||
|
||||
=item the same
|
||||
|
||||
for Makefile.
|
||||
|
||||
=back
|
||||
|
||||
=head1 BUGS
|
||||
|
||||
This program is very beta and extremely bugsome.
|
||||
Known bugs are:
|
||||
|
||||
=over 4
|
||||
|
||||
=item Poor doublequotation.
|
||||
|
||||
All identifiers such as table and column names should be enclosed in double
|
||||
quotes. Program can't handle upper-case identifiers,
|
||||
like DBA. Lower-case identifiers are OK.
|
||||
|
||||
=item SET type emulation is not full. LIKE operation on
|
||||
|
||||
SETs, raw integer input values should be implemented
|
||||
|
||||
=item B<Makefile> generated during output is
|
||||
platform-dependent and surely works only on
|
||||
Linux/gcc (FreeBSD/gcc probably works as well - not tested)
|
||||
|
||||
=item Generated B<libtypes.c> contain line
|
||||
|
||||
#include <postgres.h>
|
||||
|
||||
This file may be located not in standard compiler
|
||||
include path, you need to check it before compiling.
|
||||
|
||||
=back
|
||||
|
||||
=head1 AUTHORS
|
||||
|
||||
B<(c) 2000 Maxim V. Rudensky <fonin@ziet.zhitomir.ua>>
|
||||
B<(c) 2000 Valentine V. Danilchuk <valdan@ziet.zhitomir.ua>>
|
||||
|
||||
=head1 LICENSE
|
||||
|
||||
B<BSD>
|
||||
|
||||
=cut
|
||||
Loading…
x
Reference in New Issue
Block a user