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Clean up logging for extended-query-protocol operations, as per my recent

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proposal.  Parameter logging works even for binary-format parameters, and
logging overhead is avoided when disabled.

log_statement = all output for the src/test/examples/testlibpq3.c example
now looks like

LOG:  statement: execute <unnamed>: SELECT * FROM test1 WHERE t = $1
DETAIL:  parameters: $1 = 'joe''s place'
LOG:  statement: execute <unnamed>: SELECT * FROM test1 WHERE i = $1::int4
DETAIL:  parameters: $1 = '2'

and log_min_duration_statement = 0 results in

LOG:  duration: 2.431 ms  parse <unnamed>: SELECT * FROM test1 WHERE t = $1
LOG:  duration: 2.335 ms  bind <unnamed> to <unnamed>: SELECT * FROM test1 WHERE t = $1
DETAIL:  parameters: $1 = 'joe''s place'
LOG:  duration: 0.394 ms  execute <unnamed>: SELECT * FROM test1 WHERE t = $1
DETAIL:  parameters: $1 = 'joe''s place'
LOG:  duration: 1.251 ms  parse <unnamed>: SELECT * FROM test1 WHERE i = $1::int4
LOG:  duration: 0.566 ms  bind <unnamed> to <unnamed>: SELECT * FROM test1 WHERE i = $1::int4
DETAIL:  parameters: $1 = '2'
LOG:  duration: 0.173 ms  execute <unnamed>: SELECT * FROM test1 WHERE i = $1::int4
DETAIL:  parameters: $1 = '2'

(This example demonstrates the folly of ignoring parse/bind steps for duration
logging purposes, BTW.)

Along the way, create a less ad-hoc mechanism for determining which commands
are logged by log_statement = mod and log_statement = ddl.  The former coding
was actually missing quite a few things that look like ddl to me, and it
did not handle EXECUTE or extended query protocol correctly at all.

This commit does not do anything about the question of whether log_duration
should be removed or made less redundant with log_min_duration_statement.
This commit is contained in:
Tom Lane
2006-09-07 22:52:01 +00:00
parent b6eab50ce4
commit 893632be4e
10 changed files with 828 additions and 319 deletions
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5
src/backend/commands/portalcmds.c
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@ -14,7 +14,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/commands/portalcmds.c,v 1.54 2006/09/06 20:40:47 tgl Exp $
* $PostgreSQL: pgsql/src/backend/commands/portalcmds.c,v 1.55 2006/09/07 22:52:00 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -109,12 +109,11 @@ PerformCursorOpen(DeclareCursorStmt *stmt, ParamListInfo params)
/*
* XXX: debug_query_string is wrong here: the user might have
* submitted more than one semicolon delimited queries.
* submitted multiple semicolon delimited queries.
*/
PortalDefineQuery(portal,
NULL,
pstrdup(debug_query_string),
NULL,
"SELECT", /* cursor's query is always a SELECT */
list_make1(query),
list_make1(plan),