Examples with ContextResolvedFunction org.apache.flink.table.catalog.ContextResolvedFunction used on opensource projects

Example 1 with ContextResolvedFunction

use of org.apache.flink.table.catalog.ContextResolvedFunction in project flink by apache.

the class RexNodeJsonDeserializer method deserializeFunctionClass.

private static SqlOperator deserializeFunctionClass(JsonNode jsonNode, SerdeContext serdeContext) {
    final String className = jsonNode.required(FIELD_NAME_CLASS).asText();
    final Class<?> functionClass = loadClass(className, serdeContext, "function");
    final UserDefinedFunction functionInstance = UserDefinedFunctionHelper.instantiateFunction(functionClass);
    final ContextResolvedFunction resolvedFunction;
    // because we never serialize classes for system functions
    if (jsonNode.has(FIELD_NAME_CATALOG_NAME)) {
        final ObjectIdentifier objectIdentifier = ObjectIdentifierJsonDeserializer.deserialize(jsonNode.required(FIELD_NAME_CATALOG_NAME).asText(), serdeContext);
        resolvedFunction = ContextResolvedFunction.permanent(FunctionIdentifier.of(objectIdentifier), functionInstance);
    } else {
        resolvedFunction = ContextResolvedFunction.anonymous(functionInstance);
    }
    switch(functionInstance.getKind()) {
        case SCALAR:
        case TABLE:
            return BridgingSqlFunction.of(serdeContext.getFlinkContext(), serdeContext.getTypeFactory(), resolvedFunction);
        case AGGREGATE:
            return BridgingSqlAggFunction.of(serdeContext.getFlinkContext(), serdeContext.getTypeFactory(), resolvedFunction);
        default:
            throw new TableException(String.format("Unsupported anonymous function kind '%s' for class '%s'.", functionInstance.getKind(), className));
    }
}