pgsql: Make use of in-core query id added by commit 5fd9dfa5f5

Make use of in-core query id added by commit 5fd9dfa5f5

Use the in-core query id computation for pg_stat_activity,
log_line_prefix, and EXPLAIN VERBOSE.

Similar to other fields in pg_stat_activity, only the queryid from the
top level statements are exposed, and if the backends status isn't
active then the queryid from the last executed statements is displayed.

Add a %Q placeholder to include the queryid in log_line_prefix, which
will also only expose top level statements.

For EXPLAIN VERBOSE, if a query identifier has been computed, either by
enabling compute_query_id or using a third-party module, display it.

Bump catalog version.

Discussion: https://postgr.es/m/20210407125726.tkvjdbw76hxnpwfi@nol

Author: Julien Rouhaud

Reviewed-by: Alvaro Herrera, Nitin Jadhav, Zhihong Yu

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/4f0b0966c866ae9f0e15d7cc73ccf7ce4e1af84b

Modified Files
--------------
contrib/pg_stat_statements/pg_stat_statements.c | 112 ++++++++++--------------
doc/src/sgml/config.sgml                        |  29 ++++--
doc/src/sgml/monitoring.sgml                    |  16 ++++
doc/src/sgml/ref/explain.sgml                   |   6 +-
src/backend/catalog/system_views.sql            |   1 +
src/backend/commands/explain.c                  |  18 ++++
src/backend/executor/execMain.c                 |   9 ++
src/backend/executor/execParallel.c             |   5 +-
src/backend/parser/analyze.c                    |   5 ++
src/backend/tcop/postgres.c                     |   5 ++
src/backend/utils/activity/backend_status.c     |  68 ++++++++++++++
src/backend/utils/adt/pgstatfuncs.c             |   7 +-
src/backend/utils/error/elog.c                  |   8 ++
src/backend/utils/misc/postgresql.conf.sample   |   1 +
src/backend/utils/misc/queryjumble.c            |  27 +++---
src/include/catalog/catversion.h                |   2 +-
src/include/catalog/pg_proc.dat                 |   6 +-
src/include/utils/backend_status.h              |   5 ++
src/test/regress/expected/explain.out           |  11 ++-
src/test/regress/expected/rules.out             |   9 +-
src/test/regress/sql/explain.sql                |   5 +-
21 files changed, 250 insertions(+), 105 deletions(-)