Custom Search
www.rocket99.com : Technical Guides Sybase Oracle UNIX Javascript


Technical Guides
Sybase
Oracle
UNIX
Javascript




Of Interest

Business Intelligence and Analytics



Oracle Training





Sybase » Administration » DBA » Features

Sybase ASE 15 Enhancements

     

Table Structure Enhancements

Partitioned tables: Tables can be partitioned by range, value, or round-robin (Semantic Partitioning)

What is a partition?

A partition is a segment of a table, usually with rows sharing a common value (e.g. period_id);


Partitions allow for
  • fast deletion of data
  • simple bulk replacement of data
  • ultra high volume OLTP, via round-robin distribution
  • better query performance through partition elimination (homing in on a single partition)
  • super-large tables (hundreds of gigabytes) that are manageable


All ASE 15 tables are partitioned (most tables will have a single partition)

Computed columns
  • materialized (stored, calc'd upon datachange) or non-materialized (calc'd upon retrival)
  • computed columns can be indexed (function-based index)


Statistics
  • Update statistics is not necessary after index rebuild
  • sp_recompile is not necessary after index rebuild


Encrypted columns : meets US Government encryption standards

Object names (tables, etc) can be up to 255 characters long

Temp table (#temp) improvements, including naming

Object level recovery: allows single objects to be recovered from dump files



Query engine enhancements
  • Joins / searches now optimized for queries with calculated columns e.g. select account_id from account_header where floor(gic_subindustry/100) = 451020
  • Joins / searches now optimized for queries with mismatched data types e.g. -- join an integer with a real/float select t1.account_id from account_header t1, account_attribute t2 where t1.acct_id = t2.svalue and t2.cat_cd = 'BC'
  • Hash joins * i/o is dramatically reduced for non-index type queries, dramatically improving performance. e.g. -- join 2 tables, against non-indexed or computed columns select t2.sales_nm, count(1) from account_header t1, sales_historical_data t2 where convert( integer, ( left(convert(varchar(10),account_id),5) ) ) = t2.sales_id ** ASE 15 is up to 20 times faster than ASE 12 for these types of queries
  • Work table optimization, hash-based distinct e.g. select count(distinct round(svalue) ) from account_attribute ** ASE 15 is up to 20 times faster than ASE 12 for these types of queries






Sybase : Related Topics

Sybase : Administration : Post-installation check
Sybase : Administration : Device initialization
Sybase : Administration : Database Creation
Sybase : Administration : A backup routine
Sybase : Administration : Striping Dump Devices
Sybase : Administration : Moving the transaction log to another device
Sybase : Administration : Adding a segment to a database
Sybase : Administration : Configuring the cache
Sybase : Administration : Apply multiple transaction dumps
Sybase : Administration : Database maintenance procedure
Sybase : Administration : Database maintenance script
Sybase : Administration : Server configuration
Sybase : Administration : Dealing with a Corrupted Database
Sybase : Administration : Dealing with a Server Failure
Sybase : Administration : DBCC Notes
Sybase : Administration : Create proxy tables and external logins
Sybase : Administration : Renaming a database
Sybase : Administration : Reorg: rebuilding a table
Sybase : Administration : Setting the thresholds
Sybase : Administration : Apply a transaction dump
Sybase : Administration : Security Tasks
Sybase : Administration : Setting Process Priorities
Sybase : Administration : Sybase ASE Architecture Overview
Sybase : Administration : Drop an alias, with objects linked to login
Sybase : Administration : Display grants, effective rights to objects
Sybase : Administration : Displaying access information from sysprotects
Sybase : Administration : Database Engines: Status and Settings
Sybase : Administration : Replication Server 15 Configuration
Sybase : Administration : Loading data into Sybase IQ from a Remote Server
Sybase : Administration : Sybase IQ Overview
Sybase : Administration : Sybase IQ Functions
Sybase : Administration : Sybase IQ - Remote Access From ASE
Sybase : Administration : Sybase IQ : Procedure Profiling / Monitoring
Sybase : Administration : Sybase IQ: Restoring a Database from Dump Files
Sybase : Administration : Sybase IQ: Minimize Storage option
Sybase : Administration : Sybase IQ: Index Types
Sybase : Administration : Sybase IQ: HUGEPAGE Support
Sybase : Administration : Sybase IQ: Database Creation (Raw Devices)
Sybase : Administration : Sybase IQ : Repairing Problems / Troubleshooting Corruption
Sybase : Administration : Sybase IQ : Moving / Re-allocating / Re-org
Sybase : Administration : Sybase IQ: Sysmon / System Performance Analysis
Sybase : Administration : Sybase IQ: Monitoring Connections / Processes
Sybase : Administration : Sybase ASE: Installing a new server via srvbuildres utility
Sybase : Administration : Sybase IQ: Copying users/logins between databases
Sybase : Administration : Sybase IQ: Managing User Accounts
Sybase : Administration : Sybase ASE: Database Schema Compare
Sybase : Administration : Sybase IQ: Listing tables, ordered by size allocated
Sybase : Administration : Sybase IQ : Comparing grants / permissions between servers
Sybase : Administration : Sybase ASE: Database page size
Sybase : Administration : Sybase ASE: Managing users and roles
Sybase : Administration : Sybase ASE: Setting resource limits for users
Sybase : Administration : Sybase ASE: Setting up user assigned custom tempdbs
Sybase : Administration : Sybase ASE: Setting up the transaction log cache using logiosize
Sybase : Administration : Sybase IQ: Server Startup Switches
Sybase : Administration : Sybase ASE: Managing Identity Columns
Sybase : Administration : Sybase IQ: Working with options and server settings
Sybase : Administration : Sybase IQ: Monitoring and Troubleshooting via System Procedures

Sybase Web Site
Sybase iAnywhere Mobile Web Site
Oracle Enterprise Web Site



Get the latest Rocket99 news and tech tips via






Site Index About this Guide to Sybase, Oracle, and UNIX Contact Us Advertise on this site




Copyright © 2016 Stoltenbar Inc All Rights Reserved.