public SubmitQueryResponse execute(
QueryContext queryContext, Session session, String sql, String jsonExpr, LogicalPlan plan)
throws Exception {
SubmitQueryResponse.Builder response = SubmitQueryResponse.newBuilder();
response.setUserName(queryContext.get(SessionVars.USERNAME));
LogicalRootNode rootNode = plan.getRootBlock().getRoot();
if (PlannerUtil.checkIfSetSession(rootNode)) {
execSetSession(session, plan, response);
} else if (PlannerUtil.checkIfDDLPlan(rootNode)) {
if (PlannerUtil.isDistExecDDL(rootNode)) {
if (rootNode.getChild().getType() == NodeType.CREATE_INDEX) {
checkIndexExistence(queryContext, (CreateIndexNode) rootNode.getChild());
}
executeDistributedQuery(queryContext, session, plan, sql, jsonExpr, response);
} else {
ddlExecutor.execute(queryContext, plan);
response.setState(OK);
response.setResultType(ResultType.NO_RESULT);
}
} else if (plan.isExplain()) { // explain query
execExplain(session, sql, plan, queryContext, plan.isExplainGlobal(), response);
} else if (PlannerUtil.checkIfQueryTargetIsVirtualTable(plan)) {
execQueryOnVirtualTable(queryContext, session, sql, plan, response);
// Simple query indicates a form of 'select * from tb_name [LIMIT X];'.
} else if (PlannerUtil.checkIfSimpleQuery(plan)) {
execSimpleQuery(queryContext, session, sql, plan, response);
// NonFromQuery indicates a form of 'select a, x+y;'
} else if (PlannerUtil.checkIfNonFromQuery(plan)) {
execNonFromQuery(queryContext, session, sql, plan, response);
} else { // it requires distributed execution. So, the query is forwarded to a query master.
executeDistributedQuery(queryContext, session, plan, sql, jsonExpr, response);
}
response.setSessionVars(ProtoUtil.convertFromMap(session.getAllVariables()));
return response.build();
}
