EXPLAIN SELECT c.c_name FROM tpch100.customer c WHERE c.c_custkey = CAST(RANDOM() * 1000 AS INT) AND c.c_custkey BETWEEN 1000 AND 2000 AND c.c_custkey = 1500 結果 Query Plan - Output[c_name] => [[c_name]] - Rem
That is, MySQL explains how it would process the statement, including information about how tables are joined and in which order. For information about using EXPLAIN to obtain execution plan information, see Section 10.8.2, “EXPLAIN Output Format”. When EXPLAIN is used with FOR CONNECTION ...
% db2 connect to <database_name> % db2 set current explain mode explain % db2 -tvf <Input file with an SQL statement ended with a semicolon> % db2 set current explain mode no % db2exfmt -d <dbname> -g TIC -w -1 -n % -s % -# 0 -o <output file> 1. 2. 3. 4. 5. ...
TiDB is an open-source, cloud-native, distributed, MySQL-Compatible database for elastic scale and real-time analytics. Try free: https://tidbcloud.com/free-trial - *: support JSON format output in explain statement (#39253) · ti-chi-bot/tidb@8e0e49c
/* run it (if needed) and produce output */ ExplainOnePlan(plan, into, es, queryString, params, queryEnv, &planduration); }}/* * ExplainOneUtility - * print out the execution plan for one utility statement * (In general, utility statements don't have plans, but there are some * ...
-no_prompt = do not prompt for user input -o <outfile>; = name of output file -r <requester>; = id of explain requester -s <schema>; = Schema or qualifier of source of Explain request (SOURCE_SCHEMA) -t = terminal output desired ...
当S1,B1做完连接后,接着对Si,Bi进行连接,这里oracle将比较两个分区,选取小的那个做build input,就是动态角色互换,这个动态角色互换发生在除第一对分区以外的分区上面。 三. Hash Join算法 第1步:判定小表是否能够全部存放在hash area内存中,如果可以,则做内存hash join。如果不行,转第二步。
1:21 with the broadcast operator indicates that the input parallelism is 1 and the output parallelism is 21. id: the unique ID of an operator. In this example, id=100002 is returned. dop: the actual DOP of an operator during the runtime. The value of this parameter is the same ...
scott@ORCL> explain plan set statement_id='IDX' for create index i_t1 on t1(object_id); Explained. scott@ORCL> @Get_Plan Enter value for input_statement_id: IDX old 9: AND statement_id =upper( '&input_statement_id') new 9: AND statement_id =upper( 'IDX') ...
[ { "Plan": { "Node Type": "Expression", "Expression": { "Inputs": [], "Actions": [ { "Node Type": "Column", "Result Type": "UInt8", "Result Type": "Column", "Column": "Const(UInt8)", "Arguments": [], "Removed Arguments": [], "Result": 0 } ], "Outputs": [ ...