Package com.amazonaws.athena.connector.lambda.data.writers.extractors

Interface VarCharExtractor

All Superinterfaces:

Extractor

public interface VarCharExtractor
extends Extractor

Used to extract a VarChar value from the context object. This interface enables the use of a pseudo-code generator for RowWriter which reduces object and branching overhead when translating from your source system to Apache Arrow.

For example of how to use this, see ExampleRecordHandler in athena-federation-sdk.

Method Summary

Modifier and Type	Method	Description
void	extract(Object context, NullableVarCharHolder dst)	Used to extract a value from the context.

Method Detail

extract

void extract(Object context,
             NullableVarCharHolder dst)
      throws Exception

Used to extract a value from the context.

Parameters:

context - This is the object you provided to GeneratorRowWriter and is frequently the handle to the source system row/query from which you need to extract a value.

dst - The 'Holder' that you should write your value to and optionally set the isSet flag to > 0 for non-null or 0 for null.

Throws:

Exception - internal exception.