Set resourceGroupQueryType as String not Optional

[JeongDaeKim]

trino-gateway/gateway-ha/src/main/java/io/trino/gateway/ha/router/TrinoQueryProperties.java

Line 189 in 7b2bbde

resourceGroupQueryType = StatementUtils.getQueryType(statement).toString();

[StatementUtils.getQueryType returns Optional] (https://github.com/trinodb/trino/blob/c751cf5a500af61ff43b3ab0abd6d07b40cd7148/core/trino-main/src/main/java/io/trino/util/StatementUtils.java#L251), so resourceGroupQueryType will be Optional.toString not QueryType.toString, like Optional[...].

[Chaho12]

@willmostly

if getQueryType(statement) returns an empty Optional, as calling toString() on an empty Optional would result in a NoSuchElementException.

• https://github.com/trinodb/trino-gateway/blob/main/gateway-ha/src/main/java/io/trino/gateway/ha/router/TrinoQueryProperties.java#L189

What do you think of having a default string of UKNOWN if the optional is empty?

resourceGroupQueryType = StatementUtils.getQueryType(statement)
                                      .map(QueryType::toString)
                                      .orElse("UNKNOWN");