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 ...
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...
...这个窗口默认是全部数据,也可以规定窗口长度,如设定窗口与Group By一样,圈定当前省份下的数据。因为对当前数据处理时,可以参考窗口范围内的更多数据,所以在分析上更为灵活。...窗口函数over可以使用partition by、rows between … and …、range between … and …子句进...
新的 multirange 类型支持所有和 range 类型相关的操作。PostgreSQL 14 为嵌套对象增加了一个新的通用下标访问方法。例如，用户可以使用以下下标访问的方法获取 JSONB 数据中的元素：SELECT ('{ "this": { "now": { "works": "in postgres 14!" }}}'::jsonb)['this']['now']['works'];jsonb |-...