return new FieldDataType("string");
}
@Test
public void testFieldCacheExpression() throws Exception {
BytesRefColumnReference bytesRefColumn = new BytesRefColumnReference(fieldName().name());
bytesRefColumn.startCollect(ctx);
bytesRefColumn.setNextReader(readerContext);
IndexSearcher searcher = new IndexSearcher(readerContext.reader());
TopDocs topDocs = searcher.search(new MatchAllDocsQuery(), 20);
int i = 0;
StringBuilder builder = new StringBuilder();
for (ScoreDoc doc : topDocs.scoreDocs) {
builder.append(i);
bytesRefColumn.setNextDocId(doc.doc);
assertThat(bytesRefColumn.value().utf8ToString(), is(builder.toString()));
i++;
}
}