Horton

Re: Allow CLUSTER, VACUUM FULL and REINDEX to change tablespace on the fly

Justin Pryzby <pryzby@telsasoft.com>

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From: Justin Pryzby <pryzby@telsasoft.com>
To: Alexey Kondratov <a.kondratov@postgrespro.ru>
Cc: Michael Paquier <michael@paquier.xyz>, Masahiko Sawada <masahiko.sawada@2ndquadrant.com>, Steve Singer <steve@ssinger.info>, pgsql-hackers@lists.postgresql.org, Alvaro Herrera <alvherre@2ndquadrant.com>, Robert Haas <robertmhaas@gmail.com>, Alexander Korotkov <a.korotkov@postgrespro.ru>, Masahiko Sawada <sawada.mshk@gmail.com>, Jose Luis Tallon <jltallon@adv-solutions.net>
Date: 2020-03-27T04:01:06Z
Lists: pgsql-hackers 
> Another issue is this:
> > +VACUUM ( FULL [, ...] ) [ TABLESPACE <replaceable class="parameter">new_tablespace</replaceable> ] [ <replaceable class="parameter">table_and_columns</replaceable> [, ...] ]
> As you mentioned in your v1 patch, in the other cases, "tablespace
> [tablespace]" is added at the end of the command rather than in the middle.  I
> wasn't able to make that work, maybe because "tablespace" isn't a fully
> reserved word (?).  I didn't try with "SET TABLESPACE", although I understand
> it'd be better without "SET".

I think we should use the parenthesized syntax for vacuum - it seems clear in
hindsight.

Possibly REINDEX should use that, too, instead of adding OptTablespace at the
end.  I'm not sure.

CLUSTER doesn't support parenthesized syntax, but .. maybe it should?

Also, perhaps VAC FULL (and CLUSTER, if it grows parenthesized syntax), should
support something like this:

USING INDEX TABLESPACE name

I guess I would prefer just "index tablespace", without "using":

|VACUUM(FULL, TABLESPACE ts, INDEX TABLESPACE its) t;
|CLUSTER(VERBOSE, TABLESPACE ts, INDEX TABLESPACE its) t;

-- 
Justin

Commits

  1. Add TABLESPACE option to REINDEX

  2. Refactor code in tablecmds.c to check and process tablespace moves

  3. Refactor option handling of CLUSTER, REINDEX and VACUUM

  4. pg_dump: Don't use enums for defining bit mask values

  5. Refactor CLUSTER and REINDEX grammar to use DefElem for option lists

  6. Refactor parsing rules for option lists of EXPLAIN, VACUUM and ANALYZE

  7. Improve tab completion of REINDEX in psql

  8. Fix possible crash during FATAL exit from reindexing.