/**
* Init calculated state reading/creating
*/
private void initCachedState() {
dataEmptyKeyValueRef =
new ColumnReference(emptyKeyValueCFPtr.copyBytesIfNecessary(),
QueryConstants.EMPTY_COLUMN_BYTES);
indexQualifiers = Lists.newArrayListWithExpectedSize(this.coveredColumns.size());
for (ColumnReference ref : coveredColumns) {
indexQualifiers.add(new ImmutableBytesPtr(IndexUtil.getIndexColumnName(