mirror of
https://git.postgresql.org/git/postgresql.git
synced 2024-12-21 08:29:39 +08:00
51d16423ae
- Don't attempt to convert partial or expressional unique indexes
- Don't attempt to convert unique indexes based on a non-default
opclasses
- Untested prevention of conversion of non-btree indexes unique
indexes. Untested as postgresql doesn't allow hash, gist, or rtree
based indexes to be unique.
rbt=# create unique index t on a using hash (col);
ERROR: DefineIndex: access method "hash" does not support UNIQUE
indexes
rbt=# create unique index t on a using gist (col);
ERROR: DefineIndex: access method "gist" does not support UNIQUE
indexes
rbt=# select version();
version
------------------------------------------------------------------------
PostgreSQL 7.4devel on i386-unknown-freebsd4.8, compiled by GCC 2.95.4
Rod Taylor
46 lines
1.8 KiB
Plaintext
46 lines
1.8 KiB
Plaintext
|
|
Dependency Additions For PostgreSQL 7.3 Upgrades
|
|
|
|
In PostgreSQL releases prior to 7.3, certain database objects didn't
|
|
have proper dependencies. For example:
|
|
|
|
1) When you created a table with a SERIAL column, there was no linkage
|
|
to its underlying sequence. If you dropped the table with the SERIAL
|
|
column, the sequence was not automatically dropped.
|
|
|
|
2) When you created a foreign key, it created three triggers. If you
|
|
wanted to drop the foreign key, you had to drop the three triggers
|
|
individually.
|
|
|
|
3) When you created a column with constraint UNIQUE, a unique index was
|
|
created but there was no indication that the index was created as a
|
|
UNIQUE column constraint.
|
|
|
|
Fortunately, PostgreSQL 7.3 and later now tracks such dependencies
|
|
and handles these cases. Unfortunately, PostgreSQL dumps from prior
|
|
releases don't contain such dependency information.
|
|
|
|
This script operates on >= 7.3 databases and adds dependency information
|
|
for the objects listed above. It prompts the user on whether to create
|
|
a linkage for each object. You can use the -Y option to prevent such
|
|
prompting and have it generate all possible linkages.
|
|
|
|
This program requires the Pg:DBD Perl interface.
|
|
|
|
Usage:
|
|
|
|
adddepend [options] [dbname [username]]
|
|
|
|
Options:
|
|
-d <dbname> Specify database name to connect to (default: postgres)
|
|
-h <host> Specify database server host (default: localhost)
|
|
-p <port> Specify database server port (default: 5432)
|
|
-u <username> Specify database username (default: postgres)
|
|
--password=<pw> Specify database password (default: blank)
|
|
|
|
-Y The script normally asks whether the user wishes to apply
|
|
the conversion for each item found. This forces YES to all
|
|
questions.
|
|
|
|
Rod Taylor <pg@rbt.ca>
|