sql-execution-plan

I have 2 tables, "transaksi" and "buku". "transaksi" has around ~250k rows, and buku has around ~170k rows. Both tables have column called "k999a", and both tables use no indexes. Now I check these 2 statements. Statement 1: explain select k999a from transaksi where k999a not in (select k999a from buku); Statement 1 outputs: Seq Scan on transaksi (cost=0.00..721109017.46 rows=125426 width=9) Filter: (NOT (SubPlan 1)) SubPlan 1 -> Materialize (cost=0.00..5321.60 rows=171040 width=8) -> Seq Scan on buku (cost=0.00..3797.40 rows=171040 width=8) Statement 2: explain select k999a from transaksi

I'm a bit stuck with a stored procedure that is executing really slow. The stored procedure basically contains a query that uses an incoming parameter (in_id) and is put in a cursor like this: open tmp_cursor for select col1, col2, col3 from table1 tab where ((in_id is null) or (tab.id = in_id)); -- tab.id is the PK When I get an execution plan for the SQL query separately with predefined value, I get good results with the query using an index. However when I call the procedure from my application, I see that no index is being used and the table gets full scan, thus giving slow performance. If

The queries are performed on a large table with 11 million rows. I have already performed an ANALYZE on the table prior to the query executions. Query 1: SELECT * FROM accounts t1 LEFT OUTER JOIN accounts t2 ON (t1.account_no = t2.account_no AND t1.effective_date < t2.effective_date) WHERE t2.account_no IS NULL; Explain Analyze: Hash Anti Join (cost=480795.57..1201111.40 rows=7369854 width=292) (actual time=29619.499..115662.111 rows=1977871 loops=1) Hash Cond: ((t1.account_no)::text = (t2.account_no)::text) Join Filter: ((t1.effective_date)::text < (t2.effective_date)::text) -> Seq Scan on

I usually generate explain plans using the following in sqlplus: SET AUTOTRACE ON SET TIMING ON SET TRIMSPOOL ON SET LINES 200 SPOOL filename.txt SET AUTOTRACE TRACEONLY; {query goes here} SPOOL OFF SET AUTOTRACE OFF But what If I want to generate explain plan for a stored procedure? Is there a way to generate explain plan for the entire stored procedure? The SP has no input/output parameters. What you are generating is correctly called an "execution plan". "Explain plan" is a command used to generate and view an execution plan, much as AUTOTRACE TRACEONLY does in your example. By definition,

I have a query which is superfast in SQL Server Management STudio and super slow when run under sp_ExecuteSQL. Is this to do with caching of execution plans not happening when run under spExecuteSQL? No. You can see both execution plans and compare them using the following query. SELECT usecounts, cacheobjtype, objtype, text, query_plan, value as set_options FROM sys.dm_exec_cached_plans CROSS APPLY sys.dm_exec_sql_text(plan_handle) CROSS APPLY sys.dm_exec_query_plan(plan_handle) cross APPLY sys.dm_exec_plan_attributes(plan_handle) AS epa where text like '%Some unique string in your query%'