支持k8s,docker等容器化环境部署 支持多种常见DCS(Distributed Configuration Store)存储元数据,包括etcd,ZooKeeper,Consul,Kubernetes 这里的集群方案采用Patroni来搭建,主要是因为Patroni轻量,自定义程度高,社区也活跃。 在搭建的过程中除了上述的这么框架,还有很多框架需要用到,启到了辅助的作用,比如: 对于负载均衡集群...
This adds a tags column that can store an array of strings. How to Find One or More Elements in a PostgreSQL Array Time to discover the most effective PostgreSQL find in array approaches! The following queries will be executed using DbVisualizer, a top-rated database client with full Postgre...
In PostgreSQL, you can store an array of strings, an array of integers, etc., in array columns. The array comes in handy in some situations e.g., storing days of the week, and months of the year. JSON PostgreSQL provides two JSON data types: JSON and JSONB for storing JSON data. ...
说明:Characterwiththe given code.ForUTF8 the argumentistreatedasaUnicodecode point.Forother multibyte encodings the argument must designate a strictlyASCIIcharacter. TheNULL(0)characterisnotallowed becausetextdata types cannot store such bytes. 得到某ACSII值对应的字符 例子:chr(65)=A 函数:convert(stri...
高扩展性PostgreSQL支持多种数据类型(如JSON、XML、HSTORE)和扩展机制,允许用户创建自定义的数据类型、操作符和索引。其强大的扩展功能使得开发者可以根据特定需求扩展数据库功能。 丰富的功能PostgreSQL支持诸如事务处理、视图、触发器、外键等标准SQL功能,并且提供了先进的特性如表继承、规则系统、外部数据包装器(FDW)、...
The third parameter is the number of parameters passed. Passing NULL to the fourth parameter means that the server should figure out the parameter types. The fifth parameter is a pointer to an array of strings containing parameters. The next two parameters are only relevant with binary parameters...
函数:regexp_matches(string text, pattern text [, flags text])说明:Return all captured substrings resulting from matching a POSIX regular expression against the string. See Section 9.7.3 for more information. 对字符串按正则表达式进行匹配,如果存在则会在结果数组中表示出来 ...
如果你关掉了standard_conforming_strings,你在文串常量中写的任何反斜线都需要被双写。 请注意反斜线在串文本里已经有特殊含义了,所以如果你写一个 包含反斜线的模式常量,那你就要在 SQL 语句里写两个反斜线。 因此,写一个匹配单个反斜线的模式实际上要在语句里写四个反斜线。 你可以通过用 ESCAPE 选择一个不...
PostgreSQL supports views – virtual tables that do not store data themselves. Updatable views are supported, but updates do not occur automatically unless they meet the following conditions: The query of that view must have precisely one section in the FROM clause, which can be a table...
Fixed a crash with execution of pltsql user defined functions. Aurora Babelfish release 4.1.0, April 29, 2024 New features Babelfish introduces support for two spatial data types Geometry and Geography to store and manipulate spatial data under a limited scope. For more information, see Babelfish...