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ac355d558e
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Tom Lane ac355d558e Move most of the error checking for foreign-key constraints out of 
parse analysis and into the execution code (in tablecmds.c).  This
eliminates a lot of unreasonably complex code that needed to have two
or more execution paths in case it was dealing with a not-yet-created
table column vs. an already-existing one.  The execution code is always
dealing with already-created tables and so needs only one case.  This
also eliminates some potential race conditions (the table wasn't locked
between parse analysis and execution), makes it easy to fix the gripe
about wrong referenced-column names generating a misleading error message,
and lets us easily add a dependency from the foreign-key constraint to
the unique index that it requires the referenced table to have.  (Cf.
complaint from Kris Jurka 12-Sep-2002 on pgsql-bugs.)

Also, third try at building a deletion mechanism that is not sensitive
to the order in which pg_depend entries are visited.  Adding the above-
mentioned dependency exposed the folly of what dependency.c had been
doing: it failed for cases where B depends on C while both auto-depend
on A.  Dropping A should succeed in this case, but was failing if C
happened to be visited before B.  It appears the only solution is two
separate walks over the dependency tree.
2002-09-22 00:37:09 +00:00
config Remove leftovers from subproject removals. Fixes for Python and Kerberos 2002-09-04 22:54:18 +00:00
contrib Tiny patch fixing small documentation typo. 2002-09-20 03:54:21 +00:00
doc Provide an upgrade strategy for dump files containing functions declared 2002-09-21 18:39:26 +00:00
src Move most of the error checking for foreign-key constraints out of 2002-09-22 00:37:09 +00:00
aclocal.m4 Remove leftovers from subproject removals. Fixes for Python and Kerberos 2002-09-04 22:54:18 +00:00
configure Put in defense against gcc -ffast-math. 2002-09-20 18:38:57 +00:00
configure.in Put in defense against gcc -ffast-math. 2002-09-20 18:38:57 +00:00
COPYRIGHT
GNUmakefile.in Adjust the tarball splitting scheme to the new reality. 2002-09-06 21:57:11 +00:00
HISTORY Add mention of /contrib/adddepend to HISTORY. 2002-09-18 20:43:03 +00:00
INSTALL
Makefile
README
register.txt

README 

PostgreSQL Database Management System
=====================================
  
This directory contains the source code distribution of the PostgreSQL
database management system.

PostgreSQL is an advanced object-relational database management system
that supports an extended subset of the SQL standard, including
transactions, foreign keys, subqueries, triggers, user-defined types
and functions.  This distribution also contains several language
bindings, including C, Perl, Python, and Tcl, as well as drivers
for JDBC.

As of v7.3, the ODBC and C++ interfaces have been moved over to the
PostgreSQL Projects WebSite @ http://gborg.postgresql.org.

See the file INSTALL for instructions on how to build and install
PostgreSQL.  That file also lists supported operating systems and
hardware platforms and contains information regarding any other
software packages that are required to build or run the PostgreSQL
system.  Changes between all PostgreSQL releases are recorded in the
file HISTORY.  Copyright and license information can be found in the
file COPYRIGHT.  A comprehensive documentation set is included in this
distribution; it can be read as described in the installation
instructions.

The latest version of this software may be obtained at
ftp://ftp.postgresql.org/pub/.  For more information look at our web
site located at http://www.postgresql.org/.