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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

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