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Modify LOCK to LOCK-NOWAIT-and-loop at swap tables to avoid holding exclusive locks long time. Suggested by Kenny Gorman.

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Takahiro Itagaki
2009-04-16 06:01:01 +00:00
parent 942180c2d8
commit e1011e11fe
6 changed files with 849 additions and 680 deletions
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lib/pg_reorg.sql.in
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@ -114,7 +114,7 @@ CREATE VIEW reorg.tables AS
reorg.get_create_trigger(R.oid, PK.indexrelid) AS create_trigger,
'CREATE TABLE reorg.table_' || R.oid || ' WITH (' || array_to_string(array_append(R.reloptions, 'oids=' || CASE WHEN R.relhasoids THEN 'true' ELSE 'false' END), ',') || ') TABLESPACE ' || coalesce(quote_ident(S.spcname), 'pg_default') || ' AS SELECT * FROM ONLY ' || reorg.oid2text(R.oid) AS create_table,
'DELETE FROM reorg.log_' || R.oid AS delete_log,
'LOCK TABLE ' || reorg.oid2text(R.oid) || ' IN ACCESS EXCLUSIVE MODE' AS lock_table,
'LOCK TABLE ' || reorg.oid2text(R.oid) || ' IN ACCESS EXCLUSIVE MODE NOWAIT' AS lock_table,
reorg.get_index_keys(CK.indexrelid, R.oid) AS ckey,
'SELECT * FROM reorg.log_' || R.oid || ' ORDER BY id LIMIT $1' AS sql_peek,
'INSERT INTO reorg.table_' || R.oid || ' VALUES ($1.*)' AS sql_insert,