mirror of https://github.com/postgres/postgres
Create diff of custom changes Tom made to the utility for CREATE FUNCTION. This will make moving this utility out of CVS easier.REL8_0_STABLE
Bruce Momjian
22 years ago
parent
085fa8ac48
commit
13b63d3764
@ -0,0 +1,112 @@ |
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*** /laptop/my2pg.pl Mon Apr 19 18:51:44 2004
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--- my2pg.pl Mon Apr 19 18:59:09 2004
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***************
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*** 38,43 ****
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--- 38,50 ----
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# $My2pg: my2pg.pl,v 1.28 2001/12/06 19:32:20 fonin Exp $
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# $Id: my2pg.diff,v 1.1 2004/04/19 23:18:12 momjian Exp $
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+ # Custom patch
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+ # Revision 1.9 2002/08/22 00:01:39 tgl
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+ # Add a bunch of pseudo-types to replace the behavior formerly associated
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+ # with OPAQUE, as per recent pghackers discussion. I still want to do some
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+ # more work on the 'cstring' pseudo-type, but I'm going to commit the bulk
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+ # of the changes now before the tree starts shifting under me ...
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+
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#
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# $Log: my2pg.diff,v $
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# Revision 1.1 2004/04/19 23:18:12 momjian
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# Update to my2pg version 1.28, add docs, update URL for newest version.
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#
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# Create diff of custom changes Tom made to the utility for CREATE
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# FUNCTION.
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#
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# This will make moving this utility out of CVS easier.
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#
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# Revision 1.28 2002/11/30 12:03:48 fonin
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***************
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*** 332,342 ****
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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 $func_out="
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--- 339,349 ----
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print LIBTYPES "\n * Types for table ".uc($table_name);
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print LIBTYPES "\n */\n";
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! $types.="\nCREATE FUNCTION $typename"."_in (cstring)
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RETURNS $typename
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AS '$libtypename'
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LANGUAGE 'c'
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! WITH (ISSTRICT, ISCACHABLE);\n";
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# creating output function
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my $func_out="
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***************
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*** 386,396 ****
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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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--- 393,403 ----
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return (*a>=*b);
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}\n";
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! $types.="\nCREATE FUNCTION $typename"."_out ($typename)
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! RETURNS cstring
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AS '$libtypename'
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LANGUAGE 'c'
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! WITH (ISSTRICT, ISCACHABLE);\n";
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$types.="\nCREATE TYPE $typename (
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internallength = 2,
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***************
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*** 532,538 ****
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print LIBTYPES "\n * Types for table ".uc($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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--- 539,545 ----
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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 (cstring)
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RETURNS $typename
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AS '$libtypename'
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LANGUAGE 'c';\n";
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***************
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*** 584,591 ****
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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';\n";
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--- 591,598 ----
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\n";
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! $types.="\nCREATE FUNCTION $typename"."_out ($typename)
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! RETURNS cstring
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AS '$libtypename'
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LANGUAGE 'c';\n";
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@ -0,0 +1,193 @@ |
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<HTML> |
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<HEAD> |
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<TITLE>my2pg - MySQL -> PostgreSQL dump conversion utility.</TITLE> |
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<LINK REV="made" HREF="mailto:bhcompile@daffy.perf.redhat.com"> |
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</HEAD> |
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<BODY> |
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<A NAME="__index__"></A> |
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<!-- INDEX BEGIN --> |
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<UL> |
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<LI><A HREF="#name">NAME</A></LI> |
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<LI><A HREF="#syntax">SYNTAX</A></LI> |
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<LI><A HREF="#overview">OVERVIEW</A></LI> |
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<LI><A HREF="#commandline options">COMMAND-LINE OPTIONS</A></LI> |
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<LI><A HREF="#side effects">SIDE EFFECTS</A></LI> |
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<LI><A HREF="#bugs">BUGS</A></LI> |
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<LI><A HREF="#authors">AUTHORS</A></LI> |
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<LI><A HREF="#credits">CREDITS</A></LI> |
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<LI><A HREF="#license">LICENSE</A></LI> |
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</UL> |
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<!-- INDEX END --> |
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<HR> |
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<P> |
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<H1><A NAME="name">NAME</A></H1> |
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<P>my2pg - MySQL -> PostgreSQL dump conversion utility.</P> |
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<P> |
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<HR> |
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<H1><A NAME="syntax">SYNTAX</A></H1> |
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<PRE> |
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mysqldump db | ./my2pg.pl [-nds] > pgsqldump.sql |
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vi libtypes.c |
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make |
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psql database < pgsqldump.txt |
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where</PRE> |
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<DL> |
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<DT><STRONG><A NAME="item_pgsqldump%2Esql"><EM>pgsqldump.sql</EM></A></STRONG><BR> |
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<DD> |
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- file suitable for loading into PostgreSQL. |
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<P></P> |
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<DT><STRONG><A NAME="item_libtypes%2Ec"><EM>libtypes.c</EM></A></STRONG><BR> |
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<DD> |
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- C source for emulated MySQL types (ENUM, SET) generated by <STRONG>my2pg</STRONG> |
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<P></P></DL> |
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<P> |
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<HR> |
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<H1><A NAME="overview">OVERVIEW</A></H1> |
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<P><STRONG>my2pg</STRONG> utility attempts to convert MySQL database dump to Postgres's one. |
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<STRONG>my2pg</STRONG> performs such conversions:</P> |
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<UL> |
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<LI><STRONG><A NAME="item_Type_conversion%2E">Type conversion.</A></STRONG><BR> |
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It tries to find proper Postgres |
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type for each column. |
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Unknown types are silently pushing to output dump; |
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ENUM and SET types implemented via user types |
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(C source for such types can be found in |
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<STRONG>libtypes.c</STRONG> file); |
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<P></P> |
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<LI><STRONG><A NAME="item_Encloses_identifiers_into_double_quotes%2E">Encloses identifiers into double quotes.</A></STRONG><BR> |
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All column and table |
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names should be enclosed to double-quotes to prevent |
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conflict with reserved SQL keywords; |
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<P></P> |
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<LI><STRONG><A NAME="item_Converting">Converting</A></STRONG><BR> |
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AUTO_INCREMENT fields to SERIAL. Actually, creating the sequence and |
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setting default value to nextval('seq'), well, you know :) |
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<P></P> |
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<LI><STRONG>Converting</STRONG><BR> |
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<CODE>KEY(field)</CODE> to CREATE INDEX i_field on table (field); |
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<P></P> |
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<LI><STRONG><A NAME="item_The_same">The same</A></STRONG><BR> |
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for UNIQUE keys; |
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<P></P> |
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<LI><STRONG><A NAME="item_Indices">Indices</A></STRONG><BR> |
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are creating AFTER rows insertion (to speed up the load); |
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<P></P> |
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<LI><STRONG><A NAME="item_Translates_%27%23%27">Translates '#'</A></STRONG><BR> |
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MySQL comments to ANSI SQL '--' |
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<P></P></UL> |
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<P>It encloses dump in transaction block to prevent single errors |
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during data load.</P> |
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<P> |
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<HR> |
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<H1><A NAME="commandline options">COMMAND-LINE OPTIONS</A></H1> |
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<P>My2pg takes the following command-line options:</P> |
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<DL> |
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<DT><STRONG><A NAME="item_%2Dn">-n</A></STRONG><BR> |
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<DD> |
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Convert *CHAR DEFAULT '' NOT NULL types to *CHAR NULL. |
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Postgres can't load empty '' strings in NOT NULL fields. |
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<P></P> |
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<DT><STRONG><A NAME="item_%2Dd">-d</A></STRONG><BR> |
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<DD> |
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Add double quotes around table and column names |
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<P></P> |
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<DT><STRONG><A NAME="item_%2Dh">-h</A></STRONG><BR> |
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<DD> |
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Show usage banner. |
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<P></P> |
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<DT><STRONG><A NAME="item_%2Ds">-s</A></STRONG><BR> |
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<DD> |
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Do not attempt to convert data. Currently my2pg only tries to convert |
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date and time data. |
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<P></P></DL> |
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<P> |
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<HR> |
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<H1><A NAME="side effects">SIDE EFFECTS</A></H1> |
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<UL> |
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<LI><STRONG><A NAME="item_creates">creates</A></STRONG><BR> |
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file <STRONG>libtypes.c</STRONG> in current directory |
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overwriting existed file without any checks; |
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<P></P> |
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<LI><STRONG><A NAME="item_the_same">the same</A></STRONG><BR> |
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for Makefile. |
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<P></P></UL> |
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<P> |
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<HR> |
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<H1><A NAME="bugs">BUGS</A></H1> |
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<P>Known bugs are:</P> |
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<UL> |
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<LI><STRONG><A NAME="item_Possible_problems_with_the_timestamp_data%2E">Possible problems with the timestamp data.</A></STRONG><BR> |
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PostgreSQL does not accept incorrect date/time values like <STRONG>2002-00-15</STRONG>, |
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while MySQL does not care about that. Currently my2pg cannot handle this |
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issue. You should care yourself to convert such a data. |
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<P></P> |
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<LI><STRONG><A NAME="item_Use_%2Ds_option_if_your_numeric_data_are_broken_du">Use -s option if your numeric data are broken during conversion.</A></STRONG><BR> |
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My2pg attempts to convert MySQL timestamps of the form <STRONG>yyyymmdd</STRONG> to |
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<STRONG>yyyy-mm-dd</STRONG> and <STRONG>yyyymmddhhmmss</STRONG> to <STRONG>yyyy-mm-dd hh:mm:ss</STRONG>. It performs |
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some heuristic checks to ensure that the month,day,hour,minutes and seconds have |
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values from the correct range (0..12, 0..31, 0..23, 0..59, 0..59 respectively). |
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It is still possible that your numeric values that satisfy these conditions |
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will get broken. |
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<P></P> |
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<LI><STRONG><A NAME="item_Possible_problems_with_enclosing_identifiers_in_do">Possible problems with enclosing identifiers in double quotes.</A></STRONG><BR> |
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All identifiers such as table and column names should be enclosed in double |
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quotes. Program can't handle upper-case identifiers, |
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like DBA. Lower-case identifiers are OK. |
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<P></P> |
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<LI><STRONG><A NAME="item_SET_type_emulation_is_not_full%2E_LIKE_operation_o">SET type emulation is not full. LIKE operation on</A></STRONG><BR> |
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SETs, raw integer input values should be implemented |
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<P></P> |
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<LI><STRONG><A NAME="item_Makefile"><STRONG>Makefile</STRONG></A></STRONG><BR> |
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generated during output is |
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platform-dependent and surely works only on |
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Linux/gcc (FreeBSD/gcc probably works as well - not tested) |
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<P></P> |
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<LI><STRONG><A NAME="item_Generated_libtypes%2Ec_contain_line">Generated <STRONG>libtypes.c</STRONG> contain line</A></STRONG><BR> |
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<PRE> |
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#include <postgres.h></PRE> |
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<P>This file may be located not in standard compiler |
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include path, you need to check it before compiling.</P> |
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</UL> |
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<P> |
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<HR> |
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<H1><A NAME="authors">AUTHORS</A></H1> |
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<P><STRONG>(c) 2000-2002 Maxim V. Rudensky (<A HREF="mailto:fonin@omnistaronline.com">fonin@ziet.zhitomir.ua</A>)</STRONG> (developer, maintainer)</P> |
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<P><STRONG>(c) 2000 Valentine V. Danilchuk (<A HREF="mailto:valdan@ziet.zhitomir.ua">valdan@ziet.zhitomir.ua</A>)</STRONG> (original script)</P> |
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<P> |
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<HR> |
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<H1><A NAME="credits">CREDITS</A></H1> |
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<P>Great thanks to all those people who provided feedback and make development |
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of this tool easier.</P> |
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<P>Jeff Waugh <<A HREF="mailto:jaw@ic.net">jaw@ic.net</A>></P> |
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<P>Joakim Lemström <<A HREF="mailto:jocke@bytewize.com">jocke@bytewize.com</A>> || <<A HREF="mailto:buddyh19@hotmail.com">buddyh19@hotmail.com</A>></P> |
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<P>Yunliang Yu <<A HREF="mailto:yu@math.duke.edu">yu@math.duke.edu</A>></P> |
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<P>Brad Hilton <<A HREF="mailto:bhilton@vpop.net">bhilton@vpop.net</A>></P> |
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<P>If you are not listed here please write to me.</P> |
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<P> |
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<HR> |
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<H1><A NAME="license">LICENSE</A></H1> |
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<P><STRONG>BSD</STRONG></P> |
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</BODY> |
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</HTML> |
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