Appending Data to a Large Object Result | Teradata Vantage - Appending Data to a Large Object Result - Analytics Database - Teradata Vantage

SQL External Routine Programming

Deployment
VantageCloud
VantageCore
Edition
Enterprise
IntelliFlex
VMware
Product
Analytics Database
Teradata Vantage
Release Number
17.20
Published
June 2022
Language
English (United States)
Last Update
2023-07-11
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iiv1628111441820.ditamap
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dita:id
B035-1147
lifecycle
latest
Product Category
Teradata Vantageā„¢

A UDF that declares the result as a LOB_RESULT_LOCATOR type must use the FNC_LobAppend library function to append a sequence of bytes to the result.

The following code excerpt modifies the preceding code excerpt to show how to append data to a LOB_RESULT_LOCATOR result:

#define BUFFER_SIZE 500
   
void do_something ( LOB_LOCATOR *a,
                    LOB_RESULT_LOCATOR *result,
                    char sqlstate[6] )
{
   BYTE            buffer[BUFFER_SIZE];
   FNC_LobLength_t actlen;
   LOB_CONTEXT_ID  id;
   
   FNC_LobOpen(*a, &id, 0, BUFFER_SIZE);
   FNC_LobRead(id, buffer, BUFFER_SIZE, &actlen);
   FNC_LobAppend(*result, buffer, actlen, &actlen);
   FNC_LobClose(id);
   
    ...
   
}