Thank you Jannie, By using explore I can see the mat version of the query. In software stack page, https://www.monetdb.org/Documentation/Manuals/MonetDB/Architecture/SoftwareS... it is written that Outputs of both the first and the second layer are MAL expressions. So do you have any idea about which layer does the EXPLORE command MAL output belongs to? I am especially interested in the process between query submission and actual execution. So can you suggest me a starting point in the source code to explore more? Thank you, Mustafa Korkmaz
-----Original Message----- From: developers-list [mailto:developers-list-bounces+t-mukork=microsoft.com@monetdb.org] On Behalf Of Ying Zhang Sent: Wednesday, December 2, 2015 7:47 AM To: Communication channel for developers of the MonetDB suite. developers-list@monetdb.org Subject: Re: About compilation time
Hai Mustafa,
I’m not aware that monetdb directly gives you this information. what you could try is to prefix your query with PLAN or EXPLAIN, which will limit a monetdb server to only generate the logical or physical execution plan for the query. Do this with client and server on the same machine, send the output to /dev/null, then you can measure the wall clock time. This should give you something usable.
For only the parsing time, I’m afraid you need to dig into the source code to add timing…
Not sure what parsing/compilation details you’re looking for, but you can have a look at the output of PLAN and EXPLAIN anyway.
Best,
Jennie
On Dec 01, 2015, at 20:29 , Mustafa Korkmaz t-mukork@microsoft.com wrote:
Hello all, I’m conducting an experiment to show pros/cons of certain DBs and I need to investigate query compilation performance in details. For this, Is there any way to measure the elapsed time in query parsing/compilation time in MonetDB? Also is there any document out there to show the query parsing/compilation details? What I find for timing is only “-i” flag which gives an overall timing stat. I’d be glad for any help. Thank you Mustafa Korkmaz
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