摘要：
接前面：/* ---------------------------------------------------------------- * ExecutorRun * * This is the main routine of the executor module. It accepts * the query descriptor from the traffic cop and executes the * query plan. * * ExecutorStart must have been called ... 阅读全文
摘要：
接前面深入考察 PortalRun: 初步判断，其核心在于boolPortalRun(Portal portal, long count, bool isTopLevel, DestReceiver *dest, DestReceiver *altdest, char *completionTag){ ... portal->status = PORTAL_ACTIVE; ... PG_TRY(); { ActivePortal = portal; CurrentResourceOwner = por... 阅读全文
摘要：
接前面，回溯调用关系：exec_simple_query --> PortalStart --> ExecutorStart --> StandardExecutorStart --> InitPlan再回到 exec_simple_query 来：事前知道，表 tst04 对应的文件名为 16393。postgres=# select oid from pg_class where relname='tst04'; oid ------- 16393(1 row)postgres=# 看 exec_simple_query，加点调试信息：static 阅读全文
摘要：
接前面，在 PortalStart 中调用了 ExecutorStart，ExecutorStart 会调用 InitPlan：/* ---------------------------------------------------------------- * InitPlan * * Initializes the query plan: open files, allocate storage * and start up the rule manager * -----------------------------------------... 阅读全文