Tagged Questions
4
votes
1answer
93 views
Transactions, references and how to enforce double entry bookkeeping? (PG)
Double entry bookkeeping is
a set of rules for recording financial information in a financial
accounting system in which every transaction or event changes at least
two different nominal ...
0
votes
1answer
66 views
Getting error while importing large data through csv
I am new Postgres. I am getting constraint violation errors while importing a
large CSV file.
I want to disable all of the database constraints temporarily - I do not know how to do this.
4
votes
2answers
111 views
Custom unique column constraint, only enforced if one column has a specific value
Is it possible to have a custom unique column constraint as follows? Suppose I have two cols, subset and type, both strings (though the data types probably doesn't matter).
If type is "true", then ...
2
votes
1answer
113 views
PostgreSQL EXCLUDE USING error: Data type integer has no default operator class
In PostgreSQL 9.2.3 I am trying to create this simplified table:
CREATE TABLE test (
user_id INTEGER,
startend TSTZRANGE,
EXCLUDE USING gist (user_id WITH =, startend WITH &&)
);
...
4
votes
1answer
2k views
Optimal way to ignore duplicate inserts?
Background
This problem relates to ignoring duplicate inserts using PostgreSQL 9.2 or greater. The reason I ask is because of this code:
-- Ignores duplicates.
INSERT INTO
db_table ...
2
votes
1answer
440 views
Will FK ON UPDATE CASCADE work?
Intuitively, adding the option ON UPDATE CASCADE to a foreign key constraint will have the effect of updating all referencing columns with the updated value of the key. Would that really work?
...
2
votes
1answer
72 views
Constrain input to a few different strings
Hi I can't seem to get a constraint working the way I expect in postgreSQL.
From within pgadmin I execute the following SQL query.
-- Check: "TypeCheck"
-- ALTER TABLE "ComLog" DROP CONSTRAINT ...
1
vote
1answer
936 views
disable constraints before using pg_restore.exe
When I try to execute pg_restore.exe of a dump file from a database, it throws dozens of errors, all the same:
ERROR: insert or update on table "someTable" violates foreign key constraint ...
9
votes
3answers
4k views
PostgreSQL multi-column unique constraint and NULL values
I have a table like the following:
create table my_table (
id int8 not null,
id_A int8 not null,
id_B int8 not null,
id_C int8 null,
constraint pk_my_table primary key (id),
constraint ...
5
votes
2answers
2k views
Non-unique multicolumn foreign key
I have a "comments" table that models a conversation on a topic, like this:
id serial
topic_id integer
parent_comment_id integer
body text
So, every comment has a reference to its topic AND ...
