AI代码解释 DO$$BEGINEXECUTE'CREATE TABLE IF NOT EXISTS orders_'||EXTRACT(YEARFROMCURRENT_DATE+INTERVAL'1 year')||' PARTITION OF orders FOR VALUES FROM ('''||CURRENT_DATE+INTERVAL'1 year'||''') TO ('''||CURRENT_DATE+INTERVAL'2 years'||''')';END$$; 通过这种方式,每年年初会自动生...
EXECUTE 'CREATE TABLE IF NOT EXISTS orders_' || EXTRACT(YEAR FROM CURRENT_DATE + INTERVAL '1 year') || ' PARTITION OF orders FOR VALUES FROM (''' || CURRENT_DATE + INTERVAL '1 year' || ''') TO (''' || CURRENT_DATE + INTERVAL '2 years' || ''')'; END $$; 1. 2. 3...
DO$$BEGINEXECUTE'CREATE TABLE IF NOT EXISTS orders_'||EXTRACT(YEARFROMCURRENT_DATE+INTERVAL'1 year')||' PARTITION OF orders FOR VALUES FROM ('''||CURRENT_DATE+INTERVAL'1 year'||''') TO ('''||CURRENT_DATE+INTERVAL'2 years'||''')';END$$; 通过这种方式,每年年初会自动生成新一年的分...
into (partition P001, partition P000); alter table ltz_partition split partition P000 at (1000)-- 123 to 999 into (partition P002, partition P000); alter table ltz_partition split partition P000 at (2000)-- 1000 to 1999 into (partition P003, partition P000); alter table ltz_partitio...
def createPartitionByName(tabname: str, interval: int): tmptab = tabname + '_2' renamesql = '''alter table %s rename to %s''' % (tabname, tmptab) createsql = '''create table %s (like %s) partition by range (id)''' % (tabname, tmptab) seqname = tabname + '_id_seq_1...
but for datetime ordering columns it is an interval. For example, if the ordering column is of type date or timestamp, one could writeRANGE BETWEEN '1 day' PRECEDING AND '10 days'FOLLOWING. The offset is still required to be non-null and non-negative, though the meaning of “non-negati...
不支持interval分区,没有自带的自动新增分区功能 分区表的分区本身也是表,主表不存储数据,分区表存储数据 truncate,vacuum,analyze主表会执行所有分区。truncate only不能在主表上执行,但可以在存数据的分区表上执行,仅清除这个分区表 range,hash分区的分区键可以有多个列,list分区的分区键只能是单个列或表达式 ...
PostgreSQL group by with interval ‘'OR’statment on 'GROUP BY‘postgresql POSTGRESQL group by for interval 查询和分区By子句group by窗口 如何正确使用Postgresql中的GROUP BY函数 在PostgreSQL中使用COUNT with JOIN和GROUP BY PostgreSQL中窗口函数的最佳实践 ...
1. 目前支持range , hash分区。 HASH and RANGE partitioning schemes; 2. 支持自动分区管理(通过函数接口创建分区,自动将主表数据迁移到分区表),或手工分区管理(通过函数实现,将已有的表绑定到分区表,或者从分区表剥离)。 Both automatic and manual partition management; ...
创建声明式分区表SQL如下所示CREATE TABLE ptab01 (id int not null, tm timestamptz not null) PARTITION BY RANGE (tm);。首先我们看一下其抽象查询语法树AST,RawStmt结构体是单个语句的raw解析树的存储结构(container for any one statement's raw parse tree)。CreateStmt结构体定义在src/include/nodes/par...