Home Page for the TeradataForum
 

Archives of the TeradataForum

Message Posted: Thu, 06 Nov 2008 @ 20:33:27 GMT


     
  <Prev Next>   <<First <Prev
Next>
Last>>
 


Subj:   Re: Fastexport HEX chars at the beginning of each record
 
From:   Bob Hahn

As others have said, with FastExport you must concatenate a cast of each field to char or varchar plus literal field delimiters. If the 2 byte length is a problem cast the entire string to fixed character. To get a row delimiter specify 'format text' on the .export statement (or concatenate it).

With the TPT Export Operator, the Data Connector can add the field and record delimiters but you are still required to cast every field to character or varchar in the sql statement in the export operator.

There's another trick, with BTEQ use 'set separator' and export in report mode. It is single session, and uses field mode (so Teradata does the convert to character), and uses a lot more client cpu and is slower than FastExport or TPT Export. But you don't have to cast every field and concatenate literal delimiters--you can even use 'select *'. For smaller exports it is fine.

Similarly, with the TPT SQL Selector Operator you don't have to cast every field to character because it also uses field mode so Teradata converts to character and the DC can add the field/record delimiters. Again, it is single session and a lot slower than FastExport or the TPT Export Operator and uses significantly more client cpu.

Here's a simple BTEQ example.

     .set titledashes off;
     .set separator ',';
     .set session respbuflen max1mb;  /* these next 2 .sets maximize return
     throughput */
     .set session tworespbufs on;  /* default */
     .os rm outfile;    /* otherwise it appends to existing file */
     .export report file=outfile;
     select * from t1;
     .export reset;
     .logoff;
     .quit;


     
  <Prev Next>   <<First <Prev
Next>
Last>>
 
 
 
 
 
 
 
 
 
  
  Top Home Privacy Feedback  
 
 
Copyright for the TeradataForum (TDATA-L), Manta BlueSky    
Copyright 2016 - All Rights Reserved    
Last Modified: 15 Jun 2023