摘要:
Hive之权限 一、库级的权限 -- 授予所有权限给某个用户 grant all on msta to user {userName}; -- 授权admin privilege权限 grant ADMIN PRIVILEGE on database {dbName} to user {userNa 阅读全文
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spark之交集并集差集拉链 def main(args: Array[String]): Unit = { val sparkConf = new SparkConf().setMaster("local[*]").setAppName("Operator") val sc = new Spark 阅读全文
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PostgreSQL锁级别及什么操作获取什么锁 /* NoLock is not a lock mode, but a flag value meaning "don't get a lock" */ #define NoLock 0 #define AccessShareLock 1 /* SEL 阅读全文