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MaterializeFunction.java
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256 lines (211 loc) · 8.6 KB
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package sqlancer.materialize.ast;
import sqlancer.materialize.MaterializeSchema.MaterializeDataType;
public class MaterializeFunction implements MaterializeExpression {
private final String func;
private final MaterializeExpression[] args;
private final MaterializeDataType returnType;
private MaterializeFunctionWithResult functionWithKnownResult;
public MaterializeFunction(MaterializeFunctionWithResult func, MaterializeDataType returnType,
MaterializeExpression... args) {
functionWithKnownResult = func;
this.func = func.getName();
this.returnType = returnType;
this.args = args.clone();
}
public MaterializeFunction(MaterializeFunctionWithUnknownResult f, MaterializeDataType returnType,
MaterializeExpression... args) {
this.func = f.getName();
this.returnType = returnType;
this.args = args.clone();
}
public String getFunctionName() {
return func;
}
public MaterializeExpression[] getArguments() {
return args.clone();
}
public enum MaterializeFunctionWithResult {
ABS(1, "abs") {
@Override
public MaterializeConstant apply(MaterializeConstant[] evaluatedArgs, MaterializeExpression... args) {
if (evaluatedArgs[0].isNull()) {
return MaterializeConstant.createNullConstant();
} else {
return MaterializeConstant
.createIntConstant(Math.abs(evaluatedArgs[0].cast(MaterializeDataType.INT).asInt()));
}
}
@Override
public boolean supportsReturnType(MaterializeDataType type) {
return type == MaterializeDataType.INT;
}
@Override
public MaterializeDataType[] getInputTypesForReturnType(MaterializeDataType returnType, int nrArguments) {
return new MaterializeDataType[] { returnType };
}
},
LOWER(1, "lower") {
@Override
public MaterializeConstant apply(MaterializeConstant[] evaluatedArgs, MaterializeExpression... args) {
if (evaluatedArgs[0].isNull()) {
return MaterializeConstant.createNullConstant();
} else {
String text = evaluatedArgs[0].asString();
return MaterializeConstant.createTextConstant(text.toLowerCase());
}
}
@Override
public boolean supportsReturnType(MaterializeDataType type) {
return type == MaterializeDataType.TEXT;
}
@Override
public MaterializeDataType[] getInputTypesForReturnType(MaterializeDataType returnType, int nrArguments) {
return new MaterializeDataType[] { MaterializeDataType.TEXT };
}
},
LENGTH(1, "length") {
@Override
public MaterializeConstant apply(MaterializeConstant[] evaluatedArgs, MaterializeExpression... args) {
if (evaluatedArgs[0].isNull()) {
return MaterializeConstant.createNullConstant();
}
String text = evaluatedArgs[0].asString();
return MaterializeConstant.createIntConstant(text.length());
}
@Override
public boolean supportsReturnType(MaterializeDataType type) {
return type == MaterializeDataType.INT;
}
@Override
public MaterializeDataType[] getInputTypesForReturnType(MaterializeDataType returnType, int nrArguments) {
return new MaterializeDataType[] { MaterializeDataType.TEXT };
}
},
UPPER(1, "upper") {
@Override
public MaterializeConstant apply(MaterializeConstant[] evaluatedArgs, MaterializeExpression... args) {
if (evaluatedArgs[0].isNull()) {
return MaterializeConstant.createNullConstant();
} else {
String text = evaluatedArgs[0].asString();
return MaterializeConstant.createTextConstant(text.toUpperCase());
}
}
@Override
public boolean supportsReturnType(MaterializeDataType type) {
return type == MaterializeDataType.TEXT;
}
@Override
public MaterializeDataType[] getInputTypesForReturnType(MaterializeDataType returnType, int nrArguments) {
return new MaterializeDataType[] { MaterializeDataType.TEXT };
}
},
NUM_NONNULLS(1, "num_nonnulls") {
@Override
public MaterializeConstant apply(MaterializeConstant[] args, MaterializeExpression... origArgs) {
int nr = 0;
for (MaterializeConstant c : args) {
if (!c.isNull()) {
nr++;
}
}
return MaterializeConstant.createIntConstant(nr);
}
@Override
public MaterializeDataType[] getInputTypesForReturnType(MaterializeDataType returnType, int nrArguments) {
return getRandomTypes(nrArguments);
}
@Override
public boolean supportsReturnType(MaterializeDataType type) {
return type == MaterializeDataType.INT;
}
@Override
public boolean isVariadic() {
return true;
}
},
NUM_NULLS(1, "num_nulls") {
@Override
public MaterializeConstant apply(MaterializeConstant[] args, MaterializeExpression... origArgs) {
int nr = 0;
for (MaterializeConstant c : args) {
if (c.isNull()) {
nr++;
}
}
return MaterializeConstant.createIntConstant(nr);
}
@Override
public MaterializeDataType[] getInputTypesForReturnType(MaterializeDataType returnType, int nrArguments) {
return getRandomTypes(nrArguments);
}
@Override
public boolean supportsReturnType(MaterializeDataType type) {
return type == MaterializeDataType.INT;
}
@Override
public boolean isVariadic() {
return true;
}
};
private String functionName;
final int nrArgs;
private final boolean variadic;
public MaterializeDataType[] getRandomTypes(int nr) {
MaterializeDataType[] types = new MaterializeDataType[nr];
for (int i = 0; i < types.length; i++) {
types[i] = MaterializeDataType.getRandomType();
}
return types;
}
MaterializeFunctionWithResult(int nrArgs, String functionName) {
this.nrArgs = nrArgs;
this.functionName = functionName;
this.variadic = false;
}
/**
* Gets the number of arguments if the function is non-variadic. If the function is variadic, the minimum number
* of arguments is returned.
*
* @return the number of arguments
*/
public int getNrArgs() {
return nrArgs;
}
public abstract MaterializeConstant apply(MaterializeConstant[] evaluatedArgs, MaterializeExpression... args);
@Override
public String toString() {
return functionName;
}
public boolean isVariadic() {
return variadic;
}
public String getName() {
return functionName;
}
public abstract boolean supportsReturnType(MaterializeDataType type);
public abstract MaterializeDataType[] getInputTypesForReturnType(MaterializeDataType returnType,
int nrArguments);
public boolean checkArguments(MaterializeExpression... constants) {
return true;
}
}
@Override
public MaterializeConstant getExpectedValue() {
if (functionWithKnownResult == null) {
return null;
}
MaterializeConstant[] constants = new MaterializeConstant[args.length];
for (int i = 0; i < constants.length; i++) {
constants[i] = args[i].getExpectedValue();
if (constants[i] == null) {
return null;
}
}
return functionWithKnownResult.apply(constants, args);
}
@Override
public MaterializeDataType getExpressionType() {
return returnType;
}
}