SAS/ACCESS 9.2 for Relational Databases: Reference, Fourth Edition

SAS/ACCESS Interface to Teradata 4 The SAS/ACCESS Teradata Client 783When to Use SAS/ACCESS Locking Options 834Examples 835Setting the Isolation Level to ACCESS for Teradata Tables 835Setting Isolation Level to WRITE to Update a Teradata Table 836Preventing a Hung SAS Session When Reading and Inserting to the Same Table 836Naming Conventions for Teradata 837Teradata Conventions 837SAS Naming Conventions 837Naming Objects to Meet Teradata and SAS Conventions 837Accessing Teradata Objects That Do Not Meet SAS Naming Conventions 837Example 1: Unusual Teradata Table Name 838Example 2: Unusual Teradata Column Names 838Data Types for Teradata 838Overview 838Binary String Data 838Character String Data 839Date, Time, and Timestamp Data 839Numeric Data 840Teradata Null Values 840LIBNAME Statement Data Conversions 841Data Returned as SAS Binary Data with Default Format $HEX 842Introduction to SAS/ACCESS Interface to TeradataOverviewThis section describes SAS/ACCESS Interface to Teradata. For a list of SAS/ACCESSfeatures that are available for this interface, see “SAS/ACCESS Interface to Teradata:Supported Features” on page 85.Note: SAS/ACCESS Interface to Teradata does not support the DBLOAD andACCESS procedures. The LIBNAME engine technology enhances and replaces thefunctionality of these procedures. Therefore, you must revise SAS jobs that werewritten for a different SAS/ACCESS interface and that include DBLOAD or ACCESSprocedures before you can run them with SAS/ACCESS Interface to Teradata. 4The SAS/ACCESS Teradata ClientTeradata is a massively parallel (MPP) RDBMS. A high-end Teradata server supportsmany users. It simultaneously loads and extracts table data and processes complexqueries.Because Teradata customers run many processors at the same time for queries of thedatabase, users enjoy excellent DBMS server performance. The challenge to clientsoftware, such as SAS, is to leverage Teradata performance by rapidly extracting andloading table data. SAS/ACCESS Interface to Teradata meets this challenge by lettingyou optimize extracts and loads (reads and creates).Information throughout this document explains how you can use the SAS/ACCESSinterface to optimize DBMS operations:3 It can create and update Teradata tables. It supports a FastLoad interface thatrapidly creates new table. It can also potentially optimize table reads by usingFastExport for the highest possible read performance.