mirror of https://github.com/apache/lucene.git
17 lines
766 B
Plaintext
17 lines
766 B
Plaintext
# Apache Lucene Migration Guide
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## Separation of IndexDocument and StoredDocument (LUCENE-3312)
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The API of oal.document was restructured to differentiate between stored
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documents and indexed documents. IndexReader.document(int) now returns
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StoredDocument instead of Document. In most cases a simple replacement
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of the return type is enough to upgrade.
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## FunctionValues.exist() Behavior Changes due to ValueSource bug fixes (LUCENE-5961)
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Bugs fixed in several ValueSource functions may result in different behavior in
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situations where some documents do not have values for fields wrapped in other
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ValueSources. Users who want to preserve the previous behavior may need to wrap
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their ValueSources in a "DefFunction" along with a ConstValueSource of "0.0".
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