zoukankan      html  css  js  c++  java
  • LightDB13.3-21.2 Release Note

    E.1. Release 13.3-21.2

    Release date: 2021-10-24

    This release contains a variety of changes from LightDB 13.3-21.1.

    • This version contains a database monitor and management platform, the LightDB Enterprise Manager (LightDB-EM) embeded version, provides monitoring and management solution for LightDB.

    • New Installation Wizard, with GUI and CLI mode. Allows you to simply and easily install standalone or high-available deployment LightDB, including the LightDB-EM.

    • Enhanced PWR and ASH, especially wait-event. helps you to find out most resource-consuming activities and top SQL in your LightDB databases.

    • Enhanced Oracle compatibly, as follows: Function. rowid, sysdate, nvl function supports numeric, real, integer, text, varchar, bpchar, bit conversion. guid function. DataType. clob, blob, varchar2, number, rowid.

    • Enhanced MySQL compatibly, as follows: Function. uuid function. DataType. datetime. Syntax and features. supporting AUTO_INCREMENT, ON UPDATE CURRENT_TIMESTAMP.

    • Add a new GUC parameter lightdb_keep_temp_file, for debug purpose. allowing temporary files, such as sort and hash temporary files, be retained.

    • Add Ordered optimizer hint, which is equivalent to Leading optimizer hint.

    • To Improve database design and best practice, LightDB introduce design checking throught DDL. Five kinds of checking are supported now: keyword_not_allowed,bad_datatype,must_have_pk,must_have_gmt,no_more_100cols. This rules can all enable or enable as need, like MySQL's sql-mode. GUC parameter lightdb_best_practice_mode and lightdb_best_practice_level used for control the rule. Existing object all not effected.

    • To improve legacy system pull-mode incremental-sync speed, LightDB support hidden auto-increment primary key column and hidden update timestamp column. Add WITH PRIMARY KEY to create a implicit column ltapk, which will be incremented automatically when new row is inserted. Add WITH UPDATE CURRENT_TIMESTAMP to create a implicit column ltaut, which will be updated automatically when row is inserted or modified.

    • The following built-in extensions are auto enabled by default in every database, user don't need to perform CREATE EXTENSION manually.

      • pg_log_long_xact, pl/pgsql function to log long running transactions

      • pg_bulkload, pg_bulkload is a high speed data loading utility for LightDB, an replacement for COPY command

      • system_stats, System statistic functions for LightDB

      • timescaledb, enables scalable inserts and complex queries for time-series data

      • zhparser, a parser for full-text search of Chinese. The default configuration name is zhcfg

      • rum, RUM index access method, a more faster full text search implementation.

      • tsvector2, a extended format of tsvector, a better space usage datatype for full text search.

    • The following two extensions also built-in but not enabled by default, perform CREATE EXTENSION before using them.

      • mysql_fdw, a Foreign Data Wrapper (FDW) for MySQL

      • oracle_fdw, a Foreign Data Wrapper for Oracle

  • 相关阅读:
    员工年龄排序之桶排序
    滑动窗口中最大值
    开机自动启动Tomcat
    基于RXTX的串口通讯 windows64位系统可用
    一些SQL
    Java 实现文件上传、下载、打包、文件copy、文件夹copy。
    Page-encoding specified in XML prolog (UTF-8) is different from that specified in page directive (utf-8)
    Java -> 把Excel表格中的数据写入数据库与从数据库中读出到本地 (未完善)
    (转)解决:本地计算机 上的 OracleOraDb10g_home1TNSListener服务启动后停止
    PHP、Java对称加密中的AES加密方法
  • 原文地址:https://www.cnblogs.com/zhjh256/p/15483769.html
Copyright © 2011-2022 走看看