I have created native script that checks if a specific field (mapped to
type long) in the document is empty, using three different options below,
the two first options sometime return false.
Is there a documentation on the semantics of each option?
>From what I see, the first two options use
PackedArrayIndexFieldData.loadDirect(AtomicReaderContext context) which
gets the terms from a Lucene reader (lucene.index.SegmentReader) and since
they're not null, the field value isn't considered empty.
I'm using ElasticSearch 0.90.5 and java 1.7u17.
public class MapScript extends AbstractSearchScript {
@Override
public Object run() {
if (!doc().containsKey("field2")) //sometime false
return new Object();
if (doc().get("field2") == ScriptDocValues.EMPTY) //sometime false
return new Object();
ScriptDocValues value = (ScriptDocValues) doc().get("field2");
if (value.isEmpty()) //always true
return new Object();
return new Object();
}
}
Here’s the data for this script:
curl -XPOST localhost:9200/documents/ -d '{ "mappings" : { "type1" :
{ "properties" : { "field1" : { "type" : "long" }
} }}}'
curl -XPUT localhost:9200/documents/type1/1 -d '{ "field1" : 7 }'
curl -XPUT localhost:9200/documents/type1/_mapping -d '{ "type1" :
{ "properties" : { "field2" : {"type" : "long"}
} }}'
curl -XPUT localhost:9200/documents/type1/2 -d '{ "field1" : 77 }'
curl -XPUT localhost:9200/documents/type1/3 -d '{ "field1" : 3, "field2" :
33 }'
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