Обсуждение: How to use EXPLAIN (TIMING)

Поиск

Список

Период

Сортировка

How to use EXPLAIN (TIMING)

От

Robins Tharakan

Дата:

12 апреля 2013 г., 18:14:30

Hi,

While creating regression tests for EXPLAIN I am (somehow) unable to get (TIMING) option to work with EXPLAIN!

I must be doing something stupid but all these options below just didn't work. Could someone point me to the right direction?

mpf2=# explain (TIMING) SELECT 1;

ERROR: EXPLAIN option TIMING requires ANALYZE

mpf2=# EXPLAIN (TIMING FALSE) SELECT 1;

QUERY PLAN

------------------------------------------

Result (cost=0.00..0.01 rows=1 width=0)

(1 row)

mpf2=# EXPLAIN ANALYSE (TIMING) SELECT 1;

ERROR: syntax error at or near "TIMING"

LINE 1: EXPLAIN ANALYSE (TIMING) SELECT 1;

^

mpf2=# EXPLAIN ANALYSE (TIMING TRUE) SELECT 1;

ERROR: syntax error at or near "TIMING"

LINE 1: EXPLAIN ANALYSE (TIMING TRUE) SELECT 1;

^

mpf2=# EXPLAIN ANALYSE TIMING TRUE SELECT 1;

ERROR: syntax error at or near "TIMING"

LINE 1: EXPLAIN ANALYSE TIMING TRUE SELECT 1;

^

mpf2=# EXPLAIN ANALYSE TIMING SELECT 1;

ERROR: syntax error at or near "TIMING"

LINE 1: EXPLAIN ANALYSE TIMING SELECT 1;

^

mpf2=# EXPLAIN TIMING ANALYSE SELECT 1;

ERROR: syntax error at or near "TIMING"

LINE 1: EXPLAIN TIMING ANALYSE SELECT 1;

^

mpf2=# EXPLAIN (TIMING) ANALYSE SELECT 1;

ERROR: syntax error at or near "ANALYSE"

LINE 1: EXPLAIN (TIMING) ANALYSE SELECT 1;

^

mpf2=# EXPLAIN (TIMING) ANALYZE SELECT 1;

ERROR: syntax error at or near "ANALYZE"

LINE 1: EXPLAIN (TIMING) ANALYZE SELECT 1;

^

mpf2=# EXPLAIN (TIMING FALSE) ANALYZE SELECT 1;

ERROR: syntax error at or near "ANALYZE"

LINE 1: EXPLAIN (TIMING FALSE) ANALYZE SELECT 1;

^

mpf2=# SELECT version();

version

--------------------------------------------------------------------------------

------------------------------

PostgreSQL 9.2.3 on x86_64-unknown-linux-gnu, compiled by gcc (GCC) 4.4.6 20120

305 (Red Hat 4.4.6-4), 64-bit

(1 row)

Thanks

--

Robins Tharakan

Re: How to use EXPLAIN (TIMING)

От

Andres Freund

Дата:

12 апреля 2013 г., 18:18:13

On 2013-04-12 20:44:02 +0530, Robins Tharakan wrote:
> Hi,
> 
> While creating regression tests for EXPLAIN I am (somehow) unable to get
> (TIMING) option to work with EXPLAIN!
> 
> I must be doing something stupid but all these options below just didn't
> work. Could someone point me to the right direction?

EXPLAIN (ANALYZE, TIMING on/off) ...;

Greetings,

Andres Freund

-- Andres Freund                       http://www.2ndQuadrant.com/PostgreSQL Development, 24x7 Support, Training &
Services