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-- 1. 转换期间对表加7->8级锁,其他session对表只有读权限 -- 2. 行存转列存时 -- 2.1.只保留主键和唯一约束/唯一索引,其它索引不会迁移到列存表上 -- 2.2.存在where条件的表达式索引不会迁移到列存表上 -- 2.3.非btree索引不会迁移到列存表上 -- 2.4.没有迁移的索引会记录在字段skipidxdef中 --...
SUM(CASE WHEN (d_day_name='Sunday') THEN ss_sales_price ELSE null END) sun_sales, SUM(CASE WHEN (d_day_name='Monday') THEN ss_sales_price ELSE null END) mon_sales, SUM(CASE WHEN (d_day_name='Tuesday') THEN ss_sales_price ELSE null END) tue_sales, ...
CREATE TABLE The CREATE TABLE statement in Oracle databases is used to create new tables. GaussDB(DWS) also supports this statement. So it does not need to be migrated. ALTER TABLE The ALTER TABLE statement in Oracle databases is used to add, rename, modify, or drop/delete columns in a t...
regions. In this case, we can implement row-level permission control to user groups. Create a test user group region_bj. Step 1 Move the cursor to Settings on the right of the menu bar and click Row-level Permission in the drop-down list box. The row-level permission list page is ...
The cluster name contains 4 to 64 case-insensitive characters and must start with a letter. Only letters, digits, hyphens (-), and underscores (_) are allowed. NOTE: If the cluster name cannot be changed on the console, contact technical support. dws-demo Cluster Version Displays the vers...
I am bit new to Gson, I have a json in following format:- and have an java class:- package com.nab.testing.taf.config; And i am parsing it like this:- Case 1: com.google.gson.JsonSyntaxException: java...Having Some issues with google cloud messaging api for android I am new to...
目前开始更新 MyBatis,一起深入浅出! 目前已经更新到了: Hadoop(已更完) HDFS(已更完) MapReduce(已更完) Hive(已更完) Flume(已更完) Sqoop(已更完) Zookeeper(已更完) HBase(已更完) Redis (已更完) Kafka(已更完) Spark(已更完)
postgres$#raiseinfo'hello %', my_var; postgres$#END$$;INFO: hello worldANONYMOUSBLOCKEXECUTE 这时细心的小伙伴们就会发现,GaussDB(DWS)不仅支持了Oracle的PL/SQL的兼容性支持,对于Oracle高级包中的dbms_output.put_line函数也做了支持。所以我们也可以将两个风格混用,发现也是支持的。(^-^)V ...
case class case classOrderDetailWide( varorder_detail_id:Long =0L, varorder_id: Long=0L, varorder_status:String=null, varcreate_time:String=null, varuser_id: Long=0L, varsku_id: Long=0L, varsku_price: Double=0D, varsku_num: Long=0L, ...