key_value_store | table | postgres ambari | members | table | postgres ambari | metainfo | table | postgres ambari | permission_roleauthorization | table | postgres ambari | qrtz_blob_triggers | table | postgres ambari | qrtz_calendars | table | postgres ambari | qrtz_cron_triggers | ...
This repository contains Moray, the highly-available key-value store from Joyent. The Moray service provides a simple put/get/search/delete abstraction on top of Postgres 9.x, over plain TCP usingnode-fast. Active Branches There are currently two active branches of this repository, for the two...
现在,你可以通过Rails的更新方法来更新hstore字段的值。假设你想更新metadata字段中的某个键的值,可以使用以下代码: 这将更新metadata字段中键为key的值为new_value。 总结一下,通过上述步骤,你可以在Rails中使用PostgreSQL的hstore数据类型,并更新hstore字段的值。
Need relational database features: Some teams use NoSQL key-value stores for these types of semi-structured data-intensive workloads—but if you find yourself unwilling to go to NoSQL because there are relational database features you need, then Hyperscale (Citus) might be...
key text UNIQUE NOT NULL,value jsonb,inserted_at timestamp);CREATE INDEX idx_cache_key ON cache (key);与普通表的唯一区别是UNLOGGED关键词。至于列，使用的是JSONB值，但可以使用任何适合需要的值，例如text, varchar或者hstore。还包括inserted_at列，该列将用于缓存失效。还创建一个索引以获得更好的读取...
tree (LSM tree). RocksDB can efficiently use many CPU cores and fast storage. This is the first foreign data wrapper that connects a LSM-tree-based storage engine to PostgreSQL. Because RocksDB is an embeddable key-value store, you do not need to run another server to use this extension...
支持的数据类型有地理坐标、range类型(比如ip范围)、hstore(key/value对)、整型数组、pg_trgm。 GIST和range GIST与Range 问题(见上图示意):假设表中有一列是range类型的数据,给出一个range范围,找出表中所有和它有重叠部分的数据。 如果是B-Tree,我们可以按照range的最大值或最小值进行排序,但仍然避免不了每...
ETCDis used as the distributed configuration store (DCS). It stores the state of the PostgreSQL cluster. When there are changes to the state of any PostgreSQL node, Patroni updates the state change in the ETCD key-value store. ETCD uses this information to elect the master node and keeps ...
hstore Data type for storing sets of (key, value) pairs hypopg Hypothetical indexes for PostgreSQL http HTTP client for PostgreSQL, allows web page retrieval inside the database. insert_username Functions for tracking who changed a table
Figure 1:A typical deployment of PostgreSQL HA cluster managed by Patroni with etcd as Distributed Key-Value Store and HAProxy to provide a single endpoint for client connections to the primary node. Introducing Citus support in Patroni 3.0 ...