PHP with PostgreSQL - Getting list of Indexes & contrains

Author

Getting list of Indexes & contrains

Andrei Verovski

2005-09-13, 3:24 am

Hi,

I am using PostgreSQL 8 and adodb. adodb has a built-in function which
scans and retrieves db structure as assotiative array. Unfortunately,
it do not list indexes and constrains. What would be a SQL statement
to retrieve them?

Thanks in advance for any suggestion(s).

********************
********************
********
*** _ with best regards
*** _ Andrei Verovski (aka MacGuru)
*** _ Mac, Linux, DTP, Programming Web Site
***
*** _ http://snow.prohosting.com/guru4mac/
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Alban Medici

2005-09-13, 3:24 am

If you only want list and not exact description :
Use '\di' for indexes
And for sample description of a table '\d <yourtable>'

But for real description you have to cross pg_* tables.

Regards
Alban

-----Original Message-----
From: pgsql-php-owner@postgresql.org [mailto:pgsql-php-owner@postgresql.org]
On Behalf Of Andrei Verovski (aka MacGuru)
Sent: jeudi 8 septembre 2005 22:29
To: PostgreSQL - PHP
Subject: [PHP] Getting list of Indexes & contrains

Hi,

I am using PostgreSQL 8 and adodb. adodb has a built-in function which scans
and retrieves db structure as assotiative array. Unfortunately, it do not
list indexes and constrains. What would be a SQL statement to retrieve them?

Thanks in advance for any suggestion(s).

********************
********************
********
*** _ with best regards
*** _ Andrei Verovski (aka MacGuru)
*** _ Mac, Linux, DTP, Programming Web Site
***
*** _ http://snow.prohosting.com/guru4mac/
********************
********************
********

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Marc McIntyre

2005-09-19, 8:25 pm

If you use -E option when doing issuing a "\di" command in psql it will
show you the query that it performs to list the indexes.

For example:

mmcintyre@beta matrix $ psql -E -U clients marc_dev
Welcome to psql 7.4.7, the PostgreSQL interactive terminal.

Type: \copyright for distribution terms
\h for help with SQL commands
\? for help on internal slash commands
\g or terminate with semicolon to execute query
\q to quit

marc_dev=> \di
********* QUERY **********
SELECT n.nspname as "Schema",
c.relname as "Name",
CASE c.relkind WHEN 'r' THEN 'table' WHEN 'v' THEN 'view' WHEN 'i'
THEN 'index' WHEN 'S' THEN 'sequence' WHEN 's' THEN 'special' END as "Type",
u.usename as "Owner",
c2.relname as "Table"
FROM pg_catalog.pg_class c
JOIN pg_catalog.pg_index i ON i.indexrelid = c.oid
JOIN pg_catalog.pg_class c2 ON i.indrelid = c2.oid
LEFT JOIN pg_catalog.pg_user u ON u.usesysid = c.relowner
LEFT JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace
WHERE c.relkind IN ('i','')
AND n.nspname NOT IN ('pg_catalog', 'pg_toast')
AND pg_catalog. pg_table_is_visible(
c.oid)
ORDER BY 1,2;
********************
******
List of relations
Schema | Name | Type | Owner | Table
--------+--------------------------------+-------+---------+--------------------------
public | sq_ast_attr_name | index | clients | sq_ast_attr
public | sq_ast_attr_pkey | index | clients | sq_ast_attr
public | sq_ast_attr_type_cod
e | index | clients | sq_ast_attr
public | sq_ast_attr_type_cod
e_key | index | clients | sq_ast_attr
public | sq_ast_attr_uniq_val
_pkey | index | clients |
sq_ast_attr_uniq_val

public | sq_ast_attr_val_asse
tid | index | clients | sq_ast_attr_val
public | sq_ast_attr_val_attr
id | index | clients | sq_ast_attr_val
public | sq_ast_attr_val_conc
at | index | clients | sq_ast_attr_val
public | sq_ast_attr_val_pkey
| index | clients | sq_ast_attr_val
public | sq_ast_created | index | clients | sq_ast
public | sq_ast_edit_access_p
key | index | clients |
sq_ast_edit_access
:

You can then modify and use this query in your application.

Andrei Verovski (aka MacGuru) wrote:

>Hi,
>
>I am using PostgreSQL 8 and adodb. adodb has a built-in function which
>scans and retrieves db structure as assotiative array. Unfortunately,
>it do not list indexes and constrains. What would be a SQL statement
>to retrieve them?
>
>Thanks in advance for any suggestion(s).
>
>
> ********************
********************
********
>*** with best regards
>*** Andrei Verovski (aka MacGuru)
>*** Mac, Linux, DTP, Programming Web Site
>***
>*** http://snow.prohosting.com/guru4mac/
> ********************
********************
********
>
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>TIP 6: explain analyze is your friend
>
>
>

--
Marc McIntyre
MySource Matrix Lead Developer

...>> Sydney ...>
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Leichhardt, F: +61 (0) 2 9568 6733
NSW, 2040 W: http://www.squiz.net/

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ACT 2603

...>> London ...>
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140 Tabernacle St, F: +44 (0) 870 112 3394
London EC2A 4SD W: http://www.squiz.co.uk/

......>> Open Source - Own it - Squiz.net ...../>

IMPORTANT: This email (and any attachments) is commercial-in-confidence and or may be legally privileged and must not be forwarded, copied or shared without express permission from Squiz. If you are not the intended recipient, you may not legally copy, di
sclose or use the contents in any way and you should contact squiz@squiz.net immediately and destroy this message and any attachments. Thank you.

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Jim C. Nasby

2005-10-27, 8:14 am

You might also want to look at
http://pgfoundry.org/projects/newsysviews/ as some of the queries there
are more efficient than what's in psql (some by a couple orders of
magnitude IIRC).

On Tue, Sep 20, 2005 at 09:09:03AM +1000, Marc McIntyre wrote:
> If you use -E option when doing issuing a "\di" command in psql it will
> show you the query that it performs to list the indexes.
>
> For example:
>
> mmcintyre@beta matrix $ psql -E -U clients marc_dev
> Welcome to psql 7.4.7, the PostgreSQL interactive terminal.
>
> Type: \copyright for distribution terms
> \h for help with SQL commands
> \? for help on internal slash commands
> \g or terminate with semicolon to execute query
> \q to quit
>
> marc_dev=> \di
> ********* QUERY **********
> SELECT n.nspname as "Schema",
> c.relname as "Name",
> CASE c.relkind WHEN 'r' THEN 'table' WHEN 'v' THEN 'view' WHEN 'i'
> THEN 'index' WHEN 'S' THEN 'sequence' WHEN 's' THEN 'special' END as "Type",
> u.usename as "Owner",
> c2.relname as "Table"
> FROM pg_catalog.pg_class c
> JOIN pg_catalog.pg_index i ON i.indexrelid = c.oid
> JOIN pg_catalog.pg_class c2 ON i.indrelid = c2.oid
> LEFT JOIN pg_catalog.pg_user u ON u.usesysid = c.relowner
> LEFT JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace
> WHERE c.relkind IN ('i','')
> AND n.nspname NOT IN ('pg_catalog', 'pg_toast')
> AND pg_catalog. pg_table_is_visible(
c.oid)
> ORDER BY 1,2;
> ********************
******
> List of relations
> Schema | Name | Type | Owner | Table
> --------+--------------------------------+-------+---------+--------------------------
> public | sq_ast_attr_name | index | clients | sq_ast_attr
> public | sq_ast_attr_pkey | index | clients | sq_ast_attr
> public | sq_ast_attr_type_cod
e | index | clients | sq_ast_attr
> public | sq_ast_attr_type_cod
e_key | index | clients | sq_ast_attr
> public | sq_ast_attr_uniq_val
_pkey | index | clients |
> sq_ast_attr_uniq_val

> public | sq_ast_attr_val_asse
tid | index | clients | sq_ast_attr_val
> public | sq_ast_attr_val_attr
id | index | clients | sq_ast_attr_val
> public | sq_ast_attr_val_conc
at | index | clients | sq_ast_attr_val
> public | sq_ast_attr_val_pkey
| index | clients | sq_ast_attr_val
> public | sq_ast_created | index | clients | sq_ast
> public | sq_ast_edit_access_p
key | index | clients |
> sq_ast_edit_access
> :
>
> You can then modify and use this query in your application.
>
>
> Andrei Verovski (aka MacGuru) wrote:
>
>
>
> --
> Marc McIntyre
> MySource Matrix Lead Developer
>
> ..>> Sydney ...>
> 92 Jarrett St T: +61 (0) 2 9568 6866
> Leichhardt, F: +61 (0) 2 9568 6733
> NSW, 2040 W: http://www.squiz.net/
>
> ..>> Canberra ...>
> Walter Turnbull Bldg T: +61 (0) 2 6233 0607
> 44 Sydney Ave, F: +61 (0) 2 6233 0696
> Forrest, W: http://www.squiz.net/
> ACT 2603
>
> ..>> London ...>
> The Old Fire Station, T: +44 (0) 20 7300 7321
> 140 Tabernacle St, F: +44 (0) 870 112 3394
> London EC2A 4SD W: http://www.squiz.co.uk/
>
> .....>> Open Source - Own it - Squiz.net ...../>
>
> IMPORTANT: This email (and any attachments) is commercial-in-confidence and
> or may be legally privileged and must not be forwarded, copied or shared
> without express permission from Squiz. If you are not the intended
> recipient, you may not legally copy, disclose or use the contents in any
> way and you should contact squiz@squiz.net immediately and destroy this
> message and any attachments. Thank you.
>
>
>
>
>
> ---------------------------(end of broadcast)---------------------------
> TIP 6: explain analyze is your friend
>

--
Jim C. Nasby, Sr. Engineering Consultant jnasby@pervasive.com
Pervasive Software http://pervasive.com work: 512-231-6117
vcard: http://jim.nasby.net/pervasive.vcf cell: 512-569-9461

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