davidradl commented on code in PR #26282:
URL: https://github.com/apache/flink/pull/26282#discussion_r1989637015
##########
flink-table/flink-table-api-java/src/main/java/org/apache/flink/table/expressions/resolver/rules/ResolveCallByArgumentsRule.java:
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@@ -247,6 +265,85 @@ private Optional<TypeInference>
getOptionalTypeInference(FunctionDefinition defi
}
}
+ private UnresolvedCallExpression executeAssignment(
+ String functionName,
+ TypeInference inference,
+ UnresolvedCallExpression unresolvedCall) {
+ final List<Expression> actualArgs = unresolvedCall.getChildren();
+ final Map<String, Expression> namedArgs = new HashMap<>();
+
+ actualArgs.stream()
+ .map(this::extractAssignment)
+ .filter(Objects::nonNull)
+ .forEach(
+ assignment -> {
+ if
(namedArgs.containsKey(assignment.getKey())) {
+ throw new ValidationException(
+ String.format(
+ "Invalid call to function
'%s'. "
+ + "Duplicate named
argument found: %s",
+ functionName,
assignment.getKey()));
+ }
+ namedArgs.put(assignment.getKey(),
assignment.getValue());
+ });
+
+ if (namedArgs.isEmpty()) {
+ // Use position-based call
+ return unresolvedCall;
+ }
+
+ final List<StaticArgument> declaredArgs =
inference.getStaticArguments().orElse(null);
+ if (declaredArgs == null) {
+ throw new ValidationException(
+ String.format(
+ "Invalid call to function '%s'. "
+ + "The function does not support named
arguments. "
+ + "Please pass the arguments based on
positions (i.e. without asArgument()).",
+ functionName));
+ }
+
+ // Fill optional arguments
+ declaredArgs.forEach(
+ declaredArg -> {
+ if (declaredArg.isOptional()) {
+ namedArgs.putIfAbsent(
+ declaredArg.getName(), valueLiteral(null,
DataTypes.NULL()));
Review Comment:
Could an optional argument have a default? Or is this handled elsewhere?
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