Horton

Re: [Proposal] Global temporary tables

tushar <tushar.ahuja@enterprisedb.com>

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From: tushar <tushar.ahuja@enterprisedb.com>
To: 曾文旌 <wenjing.zwj@alibaba-inc.com>, Pavel Stehule <pavel.stehule@gmail.com>, Robert Haas <robertmhaas@gmail.com>, Prabhat Sahu <prabhat.sahu@enterprisedb.com>
Cc: Tomas Vondra <tomas.vondra@2ndquadrant.com>, Konstantin Knizhnik <k.knizhnik@postgrespro.ru>, PostgreSQL Hackers <pgsql-hackers@postgresql.org>, 蔡松露(子嘉) <zijia@taobao.com>, "Cai, Le" <le.cai@alibaba-inc.com>, 萧少聪(铁庵) <shaocong.xsc@alibaba-inc.com>
Date: 2020-04-08T10:34:20Z
Lists: pgsql-hackers

Commits

Same data as JSON: GET /api/v1/messages/:b64id/commits the thread's linked commits as JSON, with link sources. API reference →

  1. PageAddItemExtended(): Add LP_UNUSED assertion.

  2. Remove temporary files after backend crash

  3. Fix comment in indexing.c

  4. Fix failure to ignore leftover temp tables after a server crash.

On 4/7/20 2:27 PM, 曾文旌 wrote:
> Vacuum full GTT, cluster GTT is already 
> supported in global_temporary_table_v24-pg13.patch.
Please refer this below scenario , where pg_upgrade is failing
1)Server is up and running (./pg_ctl -D data status)
2)Stop the server ( ./pg_ctl -D data stop)
3)Connect to server using single user mode ( ./postgres --single -D data 
postgres) and create a global temp table
[tushar@localhost bin]$ ./postgres --single -D data1233 postgres

PostgreSQL stand-alone backend 13devel
backend> create global temp table t(n int);

--Press Ctl+D to exit

4)Perform initdb ( ./initdb -D data123)
5.Run pg_upgrade
[tushar@localhost bin]$ ./pg_upgrade -d data -D data123 -b . -B .
--
--
--
Restoring database schemas in the new cluster
   postgres
*failure*
Consult the last few lines of "pg_upgrade_dump_13592.log" for
the probable cause of the failure.
Failure, exiting

log file content  -

[tushar@localhost bin]$ tail -20   pg_upgrade_dump_13592.log
pg_restore: error: could not execute query: ERROR:  pg_type array OID 
value not set when in binary upgrade mode
Command was:
-- For binary upgrade, must preserve pg_type oid
SELECT 
pg_catalog.binary_upgrade_set_next_pg_type_oid('13594'::pg_catalog.oid);


-- For binary upgrade, must preserve pg_class oids
SELECT 
pg_catalog.binary_upgrade_set_next_heap_pg_class_oid('13593'::pg_catalog.oid);

CREATE GLOBAL TEMPORARY TABLE "public"."t" (
     "n" integer
)
WITH ("on_commit_delete_rows"='false');

-- For binary upgrade, set heap's relfrozenxid and relminmxid
UPDATE pg_catalog.pg_class
SET relfrozenxid = '0', relminmxid = '0'
WHERE oid = '"public"."t"'::pg_catalog.regclass;

-- 
regards,tushar
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