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dbxlookup with where function()

Motivator

Hi,

I am looking for a way to embed a fieldvalue to SQL for dbxlookup:

some searches
| eval p1_lon=lon-diff, p1_lat=lat-diff, p2_lon=lon+diff, p2_lat=lat+diff
| eval linestring=p1_lon + " " + p1_lat + ", " + p2_lon + " " + p2_lat
| dbxlookup connection="mysql-splunk" query="
SELECT city, ASTEXT(geom) 
FROM dbconnect.geotable where MBRContains(GeomFromText('LINESTRING(" + linestring + ")'),geom)"
OUTPUT city

, where I want to use linestring field with MBRcontains() function as an input field and get city as output field from the result of SQL.
DB is mysql and connection is OK as tested.

This is working SQL for test..

select city, ASTEXT(geom) from geotable where MBRContains(GeomFromText('LINESTRING(136.71567 35.38456, 136.72877 35.39766)'), geom);

Any comment/hint/thought/example would be appreciated!

Thank you!

0 Karma
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Re: dbxlookup with where function()

Splunk Employee
Splunk Employee

Looks like you need to make some changes in dblookup:

| eval p1_lon=lon-diff, p1_lat=lat-diff, p2_lon=lon+diff, p2_lat=lat+diff
| eval linestring=p1_lon + " " + p1_lat + ", " + p2_lon + " " + p2_lat
| dbxlookup connection="mysql-splunk" query="
   SELECT linestring, city FROM dbconnect.geotable 
   where MBRContains(GeomFromText(\""linestring"\")"
         "linestring" AS "linestring" 
         OUTPUT city
Highlighted

Re: dbxlookup with where function()

Motivator

Thank you for your comment.
I corrected my mistake in SQL..

I tried the following SQL, but still no success.

| stats count 
| eval lon=136.72222, lat=35.39111, diff=0.00654729
| eval p1_lon=lon-diff, p1_lat=lat-diff, p2_lon=lon+diff, p2_lat=lat+diff
| eval linestring=p1_lon + " " + p1_lat + ", " + p2_lon + " " + p2_lat
| dbxlookup connection="mysql-splunk" query="SELECT city, ASTEXT(geom) FROM dbconnect.geotable where MBRContains(GeomFromText('LINESTRING(\""linestring"\")'),geom)" "linestring" AS "linestring" OUTPUT city

The test SQL in my question should return one city name, but I got the following error..

Error(s) occur when processing chunks in running lookup command. Unknown column 'linestring' in 'field list'.

Does lookup field in Splunk Search should be included to selected field in the SQL?

0 Karma