@Override
public RouteResultset routeToMultiNode(
SchemaConfig schema,
boolean isSelect,
boolean cache,
QueryTreeNode ast,
RouteResultset rrs,
Collection<String> dataNodes,
String stmt)
throws SQLSyntaxErrorException {
if (isSelect) {
String sql = SelectSQLAnalyser.analyseMergeInf(rrs, ast, true, schema.getDefaultMaxLimit());
if (sql != null) {
stmt = sql;
}
}
RouteResultsetNode[] nodes = new RouteResultsetNode[dataNodes.size()];
int i = 0;
for (String dataNode : dataNodes) {
nodes[i++] = new RouteResultsetNode(dataNode, rrs.getSqlType(), stmt);
}
rrs.setCacheAble(cache);
rrs.setNodes(nodes);
return rrs;
}
/**
* 判断两个表所在节点集合是否相等
*
* @param curRNodeSet 当前表所在的节点集合
* @param newNodeSet 新表所在节点集合
* @return 返回fase(不相等)或true(相等)
* @author mycat
*/
private static boolean checkIfValidMultiTableRoute(
Set<String> curRNodeSet, Collection<String> newNodeSet) {
if (curRNodeSet.size() != newNodeSet.size()) {
return false;
} else {
for (String dataNode : newNodeSet) {
if (!curRNodeSet.contains(dataNode)) {
return false;
}
}
}
return true;
}