客户对DWS执行并发insert overwrite操作,报错:org.postgresql.util.PSQLException: ERROR: tuple concurrently updated。客户作业存在并发操作,同时对一张表执行两个insert overwrite操作。一个cn在执行:另外一个cn在执行:这个函数里面有dele
"tuple concurrently updated"); break; case TM_Deleted: elog(ERROR, "tuple concurrently deleted"); break; default: elog(ERROR, "unrecognized heap_update status: %u", result); break; } }
UPDATE, DELETE */#define ShareUpdateExclusiveLock 4/* VACUUM (non-FULL), ANALYZE, CREATE* INDEX CONCURRENTLY */#define ShareLock 5/* CREATE INDEX (WITHOUT CONCURRENTLY) */#define ShareRowExclusiveLock 6/* like EXCLUSIVE MODE, but allows ROW* ...
heap_lock_tuple的逻辑: HeapTupleSatisfiesUpdate:HeapTupleBeingUpdated:已插入,正在被修改,还没有提交。多个事务在lock元组,而且至少有一个在运行仅仅有一个事务在修改元组,但还没有提交 拿锁,修改pg_multixact, 修改flag, 放锁 tuple锁 PostgreSQL中的行锁 coltpython:Postgresql锁机制 modb.pro/db/70021一文搞懂...
PostgreSQL是一种开源的关系型数据库管理系统(RDBMS),它支持高级的SQL查询语言和广泛的数据类型。级联更新是指在更新一行数据时,同时更新该行中的多个列。 在PostgreSQL 11...
longer running, but its parent has not updated its state yet. It is not necessary to update a subtransaction’s transaction status to subcommit, so we can just defer it until main transaction commit. The main role of marking transactions as sub-committed is to provide an atomic commit proto...
table_name:Name of the table colocation of which will be updated. colocate_with:The table to which the table should be colocated with. If you want to break the colocation of a table, you should specifycolocate_with => 'none'. Return value ...
i.e. the number of tuples present in the table before the processing started. On the other hand,ins,updanddelare the numbers of tuples inserted, updated and deleted by applications during the table processing. (These "concurrent data changes" must also be incorporated into the squeezed table...
ALTERTABLE[IFEXISTS]nameDETACH PARTITIONpartition_name [CONCURRENTLY| FINALIZE ] 大表search IN ( consts ) 优化 场景: SaaS业务, 电商, 社交等场景 业务特点:IN的输入条件很多导致IN过滤慢 价值: 支持 linear search TO hash table probe,提高IN语句的处理性能, 在条件多、被过滤掉的数据量大的SQL中性能提升...
An index build with the CONCURRENTLY option failed, leaving an "invalid" index. Such indexes are useless but it can be convenient to use REINDEX to rebuild them. Note that REINDEX will not perform a concurrent build. To build the index without interfering with production it is nec...