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tableam: relation creation, VACUUM FULL/CLUSTER, SET TABLESPACE.

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This moves the responsibility for:
- creating the storage necessary for a relation, including creating a
  new relfilenode for a relation with existing storage
- non-transactional truncation of a relation
- VACUUM FULL / CLUSTER's rewrite of a table
below tableam.

This is fairly straight forward, with a bit of complexity smattered in
to move the computation of xid / multixid horizons below the AM, as
they don't make sense for every table AM.

Author: Andres Freund
Discussion: https://postgr.es/m/20180703070645.wchpu5muyto5n647@alap3.anarazel.de
This commit is contained in:
Andres Freund
2019-03-28 20:01:14 -07:00
parent 7e69323bf7
commit d25f519107
13 changed files with 856 additions and 579 deletions
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30
src/backend/commands/sequence.c
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@ -312,12 +312,17 @@ ResetSequence(Oid seq_relid)
seq->log_cnt = 0;
/*
* Create a new storage file for the sequence. We want to keep the
* sequence's relfrozenxid at 0, since it won't contain any unfrozen XIDs.
* Same with relminmxid, since a sequence will never contain multixacts.
* Create a new storage file for the sequence.
*/
RelationSetNewRelfilenode(seq_rel, seq_rel->rd_rel->relpersistence,
InvalidTransactionId, InvalidMultiXactId);
RelationSetNewRelfilenode(seq_rel, seq_rel->rd_rel->relpersistence);
/*
* Ensure sequence's relfrozenxid is at 0, since it won't contain any
* unfrozen XIDs. Same with relminmxid, since a sequence will never
* contain multixacts.
*/
Assert(seq_rel->rd_rel->relfrozenxid == InvalidTransactionId);
Assert(seq_rel->rd_rel->relminmxid == InvalidMultiXactId);
/*
* Insert the modified tuple into the new storage file.
@ -482,12 +487,17 @@ AlterSequence(ParseState *pstate, AlterSeqStmt *stmt)
/*
* Create a new storage file for the sequence, making the state
* changes transactional. We want to keep the sequence's relfrozenxid
* at 0, since it won't contain any unfrozen XIDs. Same with
* relminmxid, since a sequence will never contain multixacts.
* changes transactional.
*/
RelationSetNewRelfilenode(seqrel, seqrel->rd_rel->relpersistence,
InvalidTransactionId, InvalidMultiXactId);
RelationSetNewRelfilenode(seqrel, seqrel->rd_rel->relpersistence);
/*
* Ensure sequence's relfrozenxid is at 0, since it won't contain any
* unfrozen XIDs. Same with relminmxid, since a sequence will never
* contain multixacts.
*/
Assert(seqrel->rd_rel->relfrozenxid == InvalidTransactionId);
Assert(seqrel->rd_rel->relminmxid == InvalidMultiXactId);
/*
* Insert the modified tuple into the new storage file.