presto-main/src/main/java/io/prestosql/operator/PagesHash.java/PagesHash/positionEqualsCurrentRowIgnoreNulls
class PagesHash:    private boolean positionEqualsCurrentRowIgnoreNulls(int leftPosition, byte rawHash, int rightPosition, Page rightPage)
    {
        if (positionToHashes[leftPosition] != rawHash) {
            return false;
        }

        long pageAddress = addresses.getLong(leftPosition);
        int blockIndex = decodeSliceIndex(pageAddress);
        int blockPosition = decodePosition(pageAddress);

        return pagesHashStrategy.positionEqualsRowIgnoreNulls(blockIndex, blockPosition, rightPosition, rightPage);
    }