假设我们要创建一个表users,datemodified其中的一列在更新行时默认更新为当前时间戳。MySQL的姐妹PR中给出的解决方案是: user = Table("users", Metadata, Column("datemodified", TIMESTAMP, server_default=text("CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP"), ), ) Run Code Online (Sandbox Code Playg...
PostgreSQL supports a TIMESTAMP data type that is used to store the DateTime values in the database. In PostgreSQL, “NULL” is used as the column’s default value, if no default value is explicitly declared. However, if a particular value is assigned as the column’s default value, ...
CREATE TABLE Time: 4.362 ms postgres=# insert into t2 select generate_series(1,10000000); INSERT 0 10000000 Time: 4942.546 ms (00:04.943) postgres=# alter table t2 add d timestamp default timeofday()::timestamp; ALTER TABLE postgres=# select pg_size_pretty(pg_total_relation_size('t2'))...
或 server_default = text（'LOCALTIMESTAMP '）func. sysdate（）-不是PostgreSQL的函数。阅读更多here.
update CURRENT_TIMESTAMP, ... but with pgsql it seems you need to do a trigger: CREATE RULE [rule] AS ON UPDATE TO [table] DO UPDATE [table] SET stamp = CURRENT_TIMESTAMP \g which give you: ERROR: infinite recursion detected in rules for ...
insert插入一条数据,TIMESTAMP的列值为NULL,会自动存储时候,会将当前timestamp存储到这个timestamp列中。 1. 2. 3. 也就是说会自动分配 DEFAULT CURRENT_TIMESTAMP和ON UPDATE CURRENT_TIMESTAMP 属性。 每次更新记录都会将timestamp列更新为当前的时间戳对应的时间值 ...
I ran into this issue also, and was able to get the behavior I expected by adding this code before creating aknexclient object: consttypes=require("pg").types;constTIMESTAMP_OID=1114;types.setTypeParser(TIMESTAMP_OID,function(value){// Example value string: "2018-10-04 12:30:21.199"ret...
postgresql_connection(<= v3.2.13) primary_key(<= v2.3.8) primary_key_prefix_type(<= v3.1.0) protected_attributes(<= v2.3.8) quote_bound_value(<= v3.1.0) quoted_table_name(<= v3.1.0) quote_value(<= v3.1.0) raise_if_bind_arity_mismatch(<= v3.1.0) ...
`create_time` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT 创建时间, `update_time` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT 更新时间, 改成: `create_time` datetime DEFAULT NULL COMMENT 创建时间, ...
> I have a question about "date" & "timestamp" types in PostgreSQL. I want to > setup the default value '0000-00-00' and "0000-00-00 00:00:00" for them. > However, it seems that PostgreSQL does not support it. Could someone helps me ...