How to use EXPLAIN (TIMING)

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От	Robins Tharakan
Тема	How to use EXPLAIN (TIMING)
Дата	12 апреля 2013 г. 15:14:30
Msg-id	CAEP4nAzWMzZ08Bzo4078VREXmEp0zP2f0xjP-pB1vb4XZtE3Uw@mail.gmail.com обсуждение исходный текст
Ответы	Re: How to use EXPLAIN (TIMING)
Список	pgsql-hackers

Дерево обсуждения

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

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