Обсуждение: synonym

Hi,

Is it possible to create synonym in postgresql?

I am getting error while creating synonym.

ERROR:  syntax error at or near "synonym" at character 8

Thanks & Regards, Suresh

PostgreSQL does not support SYNOSYM or ALIAS. Synonym is a non SQL 2003 feature implemented by Microsoft SQL 2005 (I think). While it does provide an interesting abstraction, but due to lack of relational integrity, it can be considered a risk.

That is, you can create a synonym, advertise it to you programmers, the code is written around it, including stored procedures, then one day the backend of this synonym (or link or pointer) is changed/deleted/etc leading to a run time error. I don't even think a prepare would catch that.

It is the same trap as the symbolic links in unix and null pointers in C/C++.

Cheers
Medi

Medi Montaseri wrote:
> PostgreSQL does not support SYNOSYM or ALIAS. Synonym is a non SQL 2003
> feature implemented by Microsoft SQL 2005 (I think). While it does provide
> an interesting abstraction, but due to lack of relational integrity, it can
> be considered a risk.
>
> That is, you can create a synonym, advertise it to you programmers, the code
> is written around it, including stored procedures, then one day the backend
> of this synonym (or link or pointer) is changed/deleted/etc leading to a run
> time error. I don't even think a prepare would catch that.
>
> It is the same trap as the symbolic links in unix and null pointers in
> C/C++.

It is on the TODO:

* Add support for public SYNONYMs

  http://archives.postgresql.org/pgsql-hackers/2006-03/msg00519.php

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