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FelderaAggregate.java
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68 lines (54 loc) · 2.44 KB
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package sqlancer.feldera.ast;
import sqlancer.feldera.FelderaSchema;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.stream.Collectors;
public class FelderaAggregate implements FelderaExpression {
private final FelderaAggregateFunction func;
private final List<FelderaExpression> expr;
private boolean blackbox;
public enum FelderaAggregateFunction {
AVG(FelderaSchema.FelderaDataType.INT, FelderaSchema.FelderaDataType.DOUBLE),
COUNT(FelderaSchema.FelderaDataType.values()), EVERY(FelderaSchema.FelderaDataType.BOOLEAN),
MAX(FelderaSchema.FelderaDataType.values()), MIN(FelderaSchema.FelderaDataType.values()),
SOME(FelderaSchema.FelderaDataType.BOOLEAN),
SUM(FelderaSchema.FelderaDataType.INT, FelderaSchema.FelderaDataType.DOUBLE),
STDDEV(FelderaSchema.FelderaDataType.INT, FelderaSchema.FelderaDataType.DOUBLE),
STDDEV_POP(FelderaSchema.FelderaDataType.INT, FelderaSchema.FelderaDataType.DOUBLE),;
private final FelderaSchema.FelderaDataType[] supportedReturnTypes;
FelderaAggregateFunction(FelderaSchema.FelderaDataType... supportedReturnTypes) {
this.supportedReturnTypes = supportedReturnTypes.clone();
}
public List<FelderaSchema.FelderaDataType> getTypes(FelderaSchema.FelderaDataType returnType) {
return Collections.singletonList(returnType);
}
public boolean supportsReturnType(FelderaSchema.FelderaDataType returnType) {
return Arrays.stream(supportedReturnTypes).anyMatch(t -> t == returnType)
|| supportedReturnTypes.length == 0;
}
public static List<FelderaAggregateFunction> getAggregates(FelderaSchema.FelderaDataType type) {
return Arrays.stream(values()).filter(p -> p.supportsReturnType(type)).collect(Collectors.toList());
}
}
public FelderaAggregate(FelderaAggregateFunction func, List<FelderaExpression> expr) {
this.func = func;
this.expr = expr;
this.blackbox = false;
}
@Override
public boolean isBlackbox() {
return blackbox;
}
@Override
public void setBlackbox(boolean blackbox) {
this.blackbox = blackbox;
this.expr.forEach(f -> f.setBlackbox(blackbox));
}
public FelderaAggregateFunction getFunc() {
return func;
}
public List<FelderaExpression> getExpr() {
return expr;
}
}