UCOSP status report #2
Friday, February 5, 2010

For the past 2 weeks, I have been working with the first 2 patches, issimple and isempty, with the first one committed and second one pending for approval. These patches are compiled based on the latest from the GEOS library repository after the people working on it fixed the building issue, and applied the patch sent by my mentor Alex Trofast.

Next moving on, I'm going to work closely with Sara on the SEP testing and hopefully and compile a set of steps for newbies to QA for Ingres.

Wiki pages that I have been reading about.
http://community.ingres.com/wiki/Test_Developer
http://community.ingres.com/wiki/SEPGUIDE

Posted byA nerdy girl at 9:37 AM 0 comments  

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UCOSP status report #1
Friday, January 22, 2010

For the first week, I have tried stepped through the code in Ingres using the build that is generated by ./runbuild.sh -g after a clean along with gcc.

For the first patch isempty, I have the diff patch that I have so far to Andrew, Alex, and Sara. I have got a confirmation from Alex that the patch Right now I'm currently stuck on some build error that is at this point unknown to me.

I have followed the exact same steps for this way of clean build.

In $ING_ROOT:
rm -rf release install build logs tools
./runbuild.sh -c
cd src
rm -rf `svn stat | grep ? | awk '{ print $2'`
runbuild.sh -g

However, the build gave me the following error
grep --color -n error ./logs/jam_01_23_10_0309.log
1384:/data/g7iwwong/geospatial/src/common/adf/adg/adgoptab.c:1106: error: 'ADO_ISEMPTY_CNT' undeclared here (not in a function)
1385:/data/g7iwwong/geospatial/src/common/adf/adg/adgoptab.c:1106: error: 'ADZ_ISEMPTY_FIIDX' undeclared here (not in a function)

Posted byA nerdy girl at 12:47 PM 0 comments  

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UCOSP code sprint day #3
Monday, January 18, 2010

Today both the Geotools and Ingres group continued to explored the unanswered questions in their heads. We also had an hour of wrap up after lunch on what's good/bad about this meeting up.

I found the code sprint well-organized and yet elastic to different needs for different groups. I have also learnt more about the different curriculum from different schools, their strength and weakness. I am also able to get most of the discussion about sync'ing the knowledge among the team, the flow of the term, contacts, communication channel and job allocation done at this code sprint, which will definitely ease my work for the rest of the term.

Schedule of this term total = 11 weeks

Meeting: Every Friday
Where: GTalk/Skype/Google Wave
Blogs: Update 1 summarized blogpost to UCOSP per week after the meeting

Week 1(22 Jan 2010): Eva: figure out how to debug the code, and complete the 1st patch: isEmpty. See Ingres in debugging mode in action(attach gcc and run on top of Ingres?). Sara: figure out how to add test cases, how the connections are made in between the test_suite and the ingres geospatial code base, structure of the test suite for geospatial, what are the files that are needed to be modified in order to test the functions that Eva writes.
Week 2(29 Jan 2010): the 2nd patch: IsEmpty
Week 3(5 Feb 2010): testing of the first 2 patches
Week 4(12 Feb 2010): the 3rd patch: Overlaps
Week 5(19 Feb 2010): the 4th patch: NumPoints
Week 6(26 Feb 2010): testing of the 3rd, 4th patches
Week 7(5 Mar 2010): ----
Week 8(12 Mar 2010): the 5th patch: X
Week 9(19 Mar 2010): the 6th patch: Y
Week 10(26 Mar 2010): testing of the 5th, 6th patches
Week 11(2 Apr 2010): Video of seeing the SQL running in action

Posted byA nerdy girl at 12:23 PM 0 comments  

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UCOSP code sprint day #2
Saturday, January 16, 2010

Today we continue to explore the unanswered questions left over from yesterday. These are the things that I have explored

OGC stands for opengeospatial consortium, and GEOS is an implementation of the OGC specification. It is formed by a set of companies who have invested their time to have set out a standard for geospatial information systems and databases. GEOS implements part of the SFS standard and Ingres uses it for geospatial manipulation and calculation. The patch Alex sent sends me extends GEOS to support more of the standard so that Ingres can use the GEOS.

Functions instances to implement:

  • IsSimple,
  • IsEmpty,
  • Overlaps,
  • X(on points only),
  • Y(on points only),
  • NumPoints (on linestring only)

Files to change:
  • adgoptab.roc
  • fi_defn.txt
  • aduint.h
  • adfops.h
  • adupoint.c
  • adffiids.h


Following the standard that is quoted from OpenGIS Implementation Specification for Geographic information - Simple feature access:
Organization: Open Geospatial Consortium Inc.
Date: 2005-11-22
Reference number of this document: OGC 05-134
Version: 1.1.0
Category: OpenGIS® Implementation Specification
Editor: Keith Ryden

SQL functions on type Geometry
IsEmpty(g Geometry) : Integer
The return type is Integer, with a return value of 1 for TRUE, 0 for FALSE, and –1 for UNKNOWN corresponding to a function invocation on NULL arguments.
TRUE if this geometric object corresponds to the empty set

IsSimple(g Geometry): Integer
The return type is Integer, with a return value of 1 for TRUE, 0 for FALSE, and –1 for UNKNOWN corresponding to a function invocation on NULL arguments.
TRUE if this geometric object is simple, as defined in the Geometry Model

SQL functions that test spatial relationships
Overlaps(g1 Geometry, g2 Geometry) : Integer
The return type is Integer, with a return value of 1 for TRUE, 0 for FALSE, and –1 for UNKNOWN corresponding to a function invocation on NULL arguments.
TRUE if the intersection of g1 and g2 results in a value of the same dimension as g1 and g2 that is different from both g1 and g2 Integer

SQL functions on type Point
X(p Point) : Double Precision
return the x-coordinate of Point p as a double precision number

Y(p Point) : Double Precision
return the y-coordinate of Point p as a double precision number

SQL functions on type LineString
NumPoints(l LineString) : Integer
return the number of Points in the LineString

Posted byA nerdy girl at 12:23 PM 0 comments  

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UCOSP code sprint day #1
Friday, January 15, 2010

Today Andrew started off the day with explaining to the group of Ingres UCOSP students the general overview picture of how a user at the browser level, Tomcat, GEOServer/Map Server, Geotools and Ingres DMBS fit together. It's decided that the 4 students from University of Waterloo and University of British Columbia work on the Geotools communication with the Ingres DBMS, and that me working on the implementation of SQL functions while Sara test them out.

We have also decided the goal of the code sprint for the Geotools group to figure out where the code that need to be modified sit, what are the road blocks, and what is the schedule of the work for the rest of the team. It's clear for the Ingres SQL group what need to be done, so the goal of the code sprint will be having 1 patch completed and if not, what is the road block to it and the schedule fo the work for the rest of the team.

We had pizza lunch and I met with some sponsors who is those that support us financially. I have also talked in person to some other graduate students and professors who I have been talking to on IRC/mailing list in previous term, and they are working on the analysis of the performance of Ingres. Hope that I can learn more from them/together for this semester!

Posted byA nerdy girl at 12:19 PM 0 comments  

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Yay, SQL implementation in action!
Tuesday, January 5, 2010

I am always interested in coding and stepping through the code in a DBMS in action and my dreams have finally come true!

As a continuation of the work that I have been doing from last term, other than the error handling of the SQL functions, this semester it's clear that I will be implementing 6 SQL functions embedded in Ingres using the GEOS library with my mentor Alex Trofast.

Posted byA nerdy girl at 3:23 PM 0 comments  

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I'm back with Ingres again
Monday, January 4, 2010

After spending a semester with the Ingres community, I have decided to stay with the team for another semester with Andrew Ross and the Geospatial team.

Other than me, this time we also have Sara Castaneda Danaher(University of Virgin Islands) as a returning student, Lim Goh(University of Waterloo), Xiaoxiao Li(University of Waterloo), Henry Chow(University of British Columbia), and Anthony McCallum(University of British Columbia).

I'm already looking forward to the code sprint that will be 2 weeks from now :)

Posted byA nerdy girl at 2:32 PM 0 comments  

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