private static TupleFilter buildInFilter(
TblColRef[] hostCols, Set<Array<String>> satisfyingHostRecords) {
if (satisfyingHostRecords.size() == 0) {
return ConstantTupleFilter.FALSE;
}
int hn = hostCols.length;
if (hn == 1) {
CompareTupleFilter in = new CompareTupleFilter(FilterOperatorEnum.IN);
in.addChild(new ColumnTupleFilter(hostCols[0]));
in.addChild(new ConstantTupleFilter(asValues(satisfyingHostRecords)));
return in;
} else {
LogicalTupleFilter or = new LogicalTupleFilter(FilterOperatorEnum.OR);
for (Array<String> rec : satisfyingHostRecords) {
LogicalTupleFilter and = new LogicalTupleFilter(FilterOperatorEnum.AND);
for (int i = 0; i < hn; i++) {
CompareTupleFilter eq = new CompareTupleFilter(FilterOperatorEnum.EQ);
eq.addChild(new ColumnTupleFilter(hostCols[i]));
eq.addChild(new ConstantTupleFilter(rec.data[i]));
and.addChild(eq);
}
or.addChild(and);
}
return or;
}
}
private static LogicalTupleFilter buildRangeFilter(
TblColRef[] hostCols, Set<Array<String>> satisfyingHostRecords) {
int hn = hostCols.length;
String[] min = new String[hn];
String[] max = new String[hn];
findMinMax(satisfyingHostRecords, hostCols, min, max);
LogicalTupleFilter and = new LogicalTupleFilter(FilterOperatorEnum.AND);
for (int i = 0; i < hn; i++) {
CompareTupleFilter compMin = new CompareTupleFilter(FilterOperatorEnum.GTE);
compMin.addChild(new ColumnTupleFilter(hostCols[i]));
compMin.addChild(new ConstantTupleFilter(min[i]));
and.addChild(compMin);
CompareTupleFilter compMax = new CompareTupleFilter(FilterOperatorEnum.LTE);
compMax.addChild(new ColumnTupleFilter(hostCols[i]));
compMax.addChild(new ConstantTupleFilter(max[i]));
and.addChild(compMax);
}
return and;
}