private TPreparedExpression assembleFunction(
ExpressionNode functionNode,
String functionName,
List<ExpressionNode> argumentNodes,
ColumnExpressionContext columnContext,
SubqueryOperatorAssembler subqueryAssembler) {
List<TPreparedExpression> arguments =
assembleExpressions(argumentNodes, columnContext, subqueryAssembler);
TValidatedScalar overload;
SparseArray<Object> preptimeValues = null;
if (functionNode instanceof FunctionExpression) {
FunctionExpression fexpr = (FunctionExpression) functionNode;
overload = fexpr.getResolved();
preptimeValues = fexpr.getPreptimeValues();
} else if (functionNode instanceof BooleanOperationExpression) {
List<TPreptimeValue> inputPreptimeValues = new ArrayList<>(argumentNodes.size());
for (ExpressionNode argument : argumentNodes) {
inputPreptimeValues.add(argument.getPreptimeValue());
}
OverloadResolver<TValidatedScalar> scalarsResolver = registryService.getScalarsResolver();
OverloadResult<TValidatedScalar> overloadResult =
scalarsResolver.get(functionName, inputPreptimeValues);
overload = overloadResult.getOverload();
} else if (functionNode instanceof IfElseExpression) {
overload = ifElseValidated;
} else {
throw new AssertionError(functionNode);
}
TInstance resultInstance = functionNode.getType();
return new TPreparedFunction(overload, resultInstance, arguments, preptimeValues);
}
private TPreparedExpression tryLiteral(ExpressionNode node) {
TPreparedExpression result = null;
TPreptimeValue tpv = node.getPreptimeValue();
if (tpv != null) {
TInstance type = tpv.type();
ValueSource value = tpv.value();
if (type != null && value != null) result = new TPreparedLiteral(type, value);
}
return result;
}