@Override
public void analyze(Analyzer analyzer) throws AnalysisException {
if (isAnalyzed_) return;
super.analyze(analyzer);
analyzer.castAllToCompatibleType(originalChildren_);
// TODO: improve with histograms
selectivity_ = Expr.DEFAULT_SELECTIVITY;
// Rewrite between predicate into a conjunctive/disjunctive compound predicate.
if (isNotBetween_) {
// Rewrite into disjunction.
Predicate lower =
new BinaryPredicate(
BinaryPredicate.Operator.LT, originalChildren_.get(0), originalChildren_.get(1));
Predicate upper =
new BinaryPredicate(
BinaryPredicate.Operator.GT, originalChildren_.get(0), originalChildren_.get(2));
rewrittenPredicate_ = new CompoundPredicate(CompoundPredicate.Operator.OR, lower, upper);
} else {
// Rewrite into conjunction.
Predicate lower =
new BinaryPredicate(
BinaryPredicate.Operator.GE, originalChildren_.get(0), originalChildren_.get(1));
Predicate upper =
new BinaryPredicate(
BinaryPredicate.Operator.LE, originalChildren_.get(0), originalChildren_.get(2));
rewrittenPredicate_ = new CompoundPredicate(CompoundPredicate.Operator.AND, lower, upper);
}
try {
rewrittenPredicate_.analyze(analyzer);
fn_ = rewrittenPredicate_.fn_;
} catch (AnalysisException e) {
// We should have already guaranteed that analysis will succeed.
Preconditions.checkState(false, "Analysis failed in rewritten between predicate");
}
// Make sure toThrift() picks up the children of the rewritten predicate.
children_ = rewrittenPredicate_.getChildren();
}
@Override
protected void toThrift(TExprNode msg) {
rewrittenPredicate_.toThrift(msg);
}
@Override
public List<Expr> getConjuncts() {
return rewrittenPredicate_.getConjuncts();
}