zhangOranges opened a new issue, #29005:
URL: https://github.com/apache/shardingsphere/issues/29005
Version: 5.1.0
Class:org.apache.shardingsphere.sharding.route.engine.type.unicast.ShardingUnicastRoutingEngine
`@Override
public RouteContext route(final ShardingRule shardingRule) {
RouteContext result = new RouteContext();
String dataSourceName =
getRandomDataSourceName(shardingRule.getDataSourceNames());
RouteMapper dataSourceMapper = new RouteMapper(dataSourceName,
dataSourceName);
if (shardingRule.isAllBroadcastTables(logicTables)) {
List<RouteMapper> tableMappers = new
ArrayList<>(logicTables.size());
for (String each : logicTables) {
tableMappers.add(new RouteMapper(each, each));
}
result.getRouteUnits().add(new RouteUnit(dataSourceMapper,
tableMappers));
} else if (logicTables.isEmpty()) {
result.getRouteUnits().add(new RouteUnit(dataSourceMapper,
Collections.emptyList()));
} else if (1 == logicTables.size()) {
String logicTableName = logicTables.iterator().next();
if (!shardingRule.findTableRule(logicTableName).isPresent()) {
result.getRouteUnits().add(new RouteUnit(dataSourceMapper,
Collections.emptyList()));
return result;
}
DataNode dataNode = shardingRule.getDataNode(logicTableName);
result.getRouteUnits().add(new RouteUnit(new
RouteMapper(dataNode.getDataSourceName(), dataNode.getDataSourceName()),
Collections.singletonList(new
RouteMapper(logicTableName, dataNode.getTableName()))));
} else {
routeWithMultipleTables(result, shardingRule);
}
return result;
}`
shardingRule.getDataNode method
Class:org.apache.shardingsphere.sharding.rule.ShardingRule
` public DataNode getDataNode(final String logicTableName) {
TableRule tableRule = getTableRule(logicTableName);
return tableRule.getActualDataNodes().get(0);
}`
Directly get (0) here
If I choose one, the results of my query will not be correct. Should I
return all the actual nodes here?
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