Examples with SecondaryIndexPrefixScan herddb.index.SecondaryIndexPrefixScan used on opensource projects

Example 6 with SecondaryIndexPrefixScan

use of herddb.index.SecondaryIndexPrefixScan in project herddb by diennea.

the class SQLPlanner method findSecondaryIndexOperation.

private static IndexOperation findSecondaryIndexOperation(AbstractIndexManager index, Expression where, Table table) throws StatementExecutionException {
    IndexOperation secondaryIndexOperation = null;
    String[] columnsToMatch = index.getColumnNames();
    SQLRecordKeyFunction indexSeekFunction = findIndexAccess(where, columnsToMatch, index.getIndex(), table.name, EqualsTo.class);
    if (indexSeekFunction != null) {
        if (indexSeekFunction.isFullPrimaryKey()) {
            secondaryIndexOperation = new SecondaryIndexSeek(index.getIndexName(), columnsToMatch, indexSeekFunction);
        } else {
            secondaryIndexOperation = new SecondaryIndexPrefixScan(index.getIndexName(), columnsToMatch, indexSeekFunction);
        }
    } else {
        SQLRecordKeyFunction rangeMin = findIndexAccess(where, columnsToMatch, index.getIndex(), table.name, GreaterThanEquals.class);
        if (rangeMin != null && !rangeMin.isFullPrimaryKey()) {
            rangeMin = null;
        }
        if (rangeMin == null) {
            rangeMin = findIndexAccess(where, columnsToMatch, index.getIndex(), table.name, GreaterThan.class);
            if (rangeMin != null && !rangeMin.isFullPrimaryKey()) {
                rangeMin = null;
            }
        }
        SQLRecordKeyFunction rangeMax = findIndexAccess(where, columnsToMatch, index.getIndex(), table.name, MinorThanEquals.class);
        if (rangeMax != null && !rangeMax.isFullPrimaryKey()) {
            rangeMax = null;
        }
        if (rangeMax == null) {
            rangeMax = findIndexAccess(where, columnsToMatch, index.getIndex(), table.name, MinorThan.class);
            if (rangeMax != null && !rangeMax.isFullPrimaryKey()) {
                rangeMax = null;
            }
        }
        if (rangeMin != null || rangeMax != null) {
            secondaryIndexOperation = new SecondaryIndexRangeScan(index.getIndexName(), columnsToMatch, rangeMin, rangeMax);
        }
    }
    return secondaryIndexOperation;
}