use of org.apache.calcite.sql.validate.SqlUserDefinedAggFunction 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);
}
}
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