Examples with FunctionParameter org.apache.calcite.schema.FunctionParameter used on opensource projects

Example 6 with FunctionParameter

use of org.apache.calcite.schema.FunctionParameter in project beam by apache.

the class UdafImpl method getParameters.

@Override
public List<FunctionParameter> getParameters() {
    List<FunctionParameter> para = new ArrayList<>();
    para.add(new FunctionParameter() {

        @Override
        public int getOrdinal() {
            // up to one parameter is supported in UDAF.
            return 0;
        }

        @Override
        public String getName() {
            // not used as Beam SQL uses its own execution engine
            return null;
        }

        @Override
        public RelDataType getType(RelDataTypeFactory typeFactory) {
            Type inputType = getInputType();
            if (inputType instanceof TypeVariable) {
                throw new IllegalArgumentException("Unable to infer SQL type from type variable " + inputType + ". This usually means you are trying to use a generic type whose type information " + "is not known at runtime. You can wrap your CombineFn into typed subclass" + " by 'new TypedCombineFnDelegate<...>(combineFn) {}'");
            }
            return CalciteUtils.sqlTypeWithAutoCast(typeFactory, inputType);
        }

        @Override
        public boolean isOptional() {
            // not used as Beam SQL uses its own execution engine
            return false;
        }
    });
    return para;
}

Example 7 with FunctionParameter

use of org.apache.calcite.schema.FunctionParameter in project beam by apache.

the class LazyAggregateCombineFnTest method nonparameterizedGetUdafImpl_throwsIllegalStateException.

@Test
public void nonparameterizedGetUdafImpl_throwsIllegalStateException() {
    LazyAggregateCombineFn<?, ?, ?> combiner = new LazyAggregateCombineFn<>(new NonParameterizedAggregateFn());
    AggregateFunction aggregateFunction = combiner.getUdafImpl();
    RelDataTypeFactory typeFactory = new JavaTypeFactoryImpl(RelDataTypeSystem.DEFAULT);
    exceptions.expect(IllegalStateException.class);
    List<FunctionParameter> params = aggregateFunction.getParameters();
    params.get(0).getType(typeFactory);
}

Example 8 with FunctionParameter

use of org.apache.calcite.schema.FunctionParameter in project calcite by apache.

the class CalciteCatalogReader method toOp.

/**
 * Converts a function to a {@link org.apache.calcite.sql.SqlOperator}.
 *
 * <p>The {@code typeFactory} argument is technical debt; see [CALCITE-2082]
 * Remove RelDataTypeFactory argument from SqlUserDefinedAggFunction
 * constructor.
 */
private static SqlOperator toOp(RelDataTypeFactory typeFactory, SqlIdentifier name, final Function function) {
    List<RelDataType> argTypes = new ArrayList<>();
    List<SqlTypeFamily> typeFamilies = new ArrayList<>();
    for (FunctionParameter o : function.getParameters()) {
        final RelDataType type = o.getType(typeFactory);
        argTypes.add(type);
        typeFamilies.add(Util.first(type.getSqlTypeName().getFamily(), SqlTypeFamily.ANY));
    }
    final Predicate<Integer> optional = new PredicateImpl<Integer>() {

        public boolean test(Integer input) {
            return function.getParameters().get(input).isOptional();
        }
    };
    final FamilyOperandTypeChecker typeChecker = OperandTypes.family(typeFamilies, optional);
    final List<RelDataType> paramTypes = toSql(typeFactory, argTypes);
    if (function instanceof ScalarFunction) {
        return new SqlUserDefinedFunction(name, infer((ScalarFunction) function), InferTypes.explicit(argTypes), typeChecker, paramTypes, function);
    } else if (function instanceof AggregateFunction) {
        return new SqlUserDefinedAggFunction(name, infer((AggregateFunction) function), InferTypes.explicit(argTypes), typeChecker, (AggregateFunction) function, false, false, typeFactory);
    } else if (function instanceof TableMacro) {
        return new SqlUserDefinedTableMacro(name, ReturnTypes.CURSOR, InferTypes.explicit(argTypes), typeChecker, paramTypes, (TableMacro) function);
    } else if (function instanceof TableFunction) {
        return new SqlUserDefinedTableFunction(name, ReturnTypes.CURSOR, InferTypes.explicit(argTypes), typeChecker, paramTypes, (TableFunction) function);
    } else {
        throw new AssertionError("unknown function type " + function);
    }
}

Example 9 with FunctionParameter

use of org.apache.calcite.schema.FunctionParameter in project calcite by apache.

the class SqlUserDefinedAggFunction method getParamTypes.

@Override
public List<RelDataType> getParamTypes() {
    List<RelDataType> argTypes = new ArrayList<>();
    for (FunctionParameter o : function.getParameters()) {
        final RelDataType type = o.getType(typeFactory);
        argTypes.add(type);
    }
    return toSql(argTypes);
}