private String locateAppropriateDialectFunctionNameForAliasTest() {
for (Iterator itr = getDialect().getFunctions().entrySet().iterator(); itr.hasNext(); ) {
final Map.Entry entry = (Map.Entry) itr.next();
final SQLFunction function = (SQLFunction) entry.getValue();
if (!function.hasArguments() && !function.hasParenthesesIfNoArguments()) {
return (String) entry.getKey();
}
}
return null;
}
private static boolean isFunction(
String lcToken, String nextToken, SQLFunctionRegistry functionRegistry) {
// checking for "(" is currently redundant because it is checked before getting here;
// doing the check anyhow, in case that earlier check goes away;
if ("(".equals(nextToken)) {
return true;
}
SQLFunction function = functionRegistry.findSQLFunction(lcToken);
if (function == null) {
// lcToken does not refer to a function
return false;
}
// if function.hasParenthesesIfNoArguments() is true, then assume
// lcToken is not a function (since it is not followed by '(')
return !function.hasParenthesesIfNoArguments();
}