pg_dump problem
PgSQL 7.0.2
I used pg_dump to dump the schema of a db. I created table part_presencial
with this command
create table part_presencial(
login char(15) not null,
id_curso_polo int4 not null,
data_encontro date not null,
nota numeric(2,2) null,
foreign key(login,id_curso_polo) references matricula,
foreign key(id_curso_polo,data_encontro) references presencial,
primary key(login,id_curso_polo,data_encontro));
But pg_dump gives me this:
CREATE TABLE "part_presencial" (
"login" char(15) NOT NULL,
"id_curso_polo" int4 NOT NULL,
"data_encontro" date NOT NULL,
"nota" numeric(2,2),
PRIMARY KEY ("login", "id_curso_polo", "data_encontro")
);
Why doesn't pg_dump give me foreign keys constraints? It happens to all the
tables with foreign keys.
-----
Paulo Roberto Siqueira
paulo.siqueira@usa.net
Database Administrator
Goiania - GO - Brazil
At 22:05 3/08/00 -0300, Paulo Roberto Siqueira wrote:
Why doesn't pg_dump give me foreign keys constraints? It happens to all the
tables with foreign keys.
pg_dump does not restore the database by executing the same set of commands
as you used to create the database. Foreign key constraints are implemented
using a special kind of trigger (CONSTRAINT TRIGGER). If you look through
the pg_dump output, you will find a number of 'CREATE CONSTRAINT TRIGGER'
statements which will reapply the foreign key constraints.
This is definitely not an ideal situation, and with time I hope that
pg_dump output will become as close to ISO SQL as possible. But in the
example you quoted I would expect pg_dump to dump a basic 'create table'
statement followed by several 'alter table add constraint...' statements,
not one complex table definition.
Hope this helps,
Philip Warner.
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