Bug report #5252

MSSQL Estimated table parameter is not used

Added by Jeremy Palmer over 12 years ago. Updated almost 11 years ago.

Assignee:Tamas Szekeres
Category:Data Provider
Affected QGIS version:master Regression?:No
Operating System:Windows Easy fix?:No
Pull Request or Patch supplied:No Resolution:
Crashes QGIS or corrupts data:No Copied to github as #:14986


When loading the "Add MS Tables(s)" Dialog and connecting to a MSSQL database, determining the geometry type is very slow for large table, even if the "Use estimated table parameters" option is set for the connection.

Looking at https://github.com/qgis/Quantum-GIS/blob/d212ca7f7174a2063f245e31e27f2848387c1df0/src/providers/mssql/qgsmssqlsourceselect.cpp#L740 is seems like it should be working. Maybe the parameter is not being passed down correctly?

Associated revisions

Revision 51011559
Added by Tamas Szekeres over 12 years ago

Improve handling of estimated metadata (fixes #5227 fixes #5252)


#1 Updated by Tamas Szekeres over 12 years ago

Fixed in :szekerest/Quantum-GIS.git

#2 Updated by Tamas Szekeres over 12 years ago

  • Status changed from Open to Closed

#3 Updated by Jeremy Palmer over 12 years ago

  • Assignee changed from Tamas Szekeres to Jürgen Fischer

Thanks. Can this stuff be backported to 1.8?

#4 Updated by Jeremy Palmer over 12 years ago

  • Status changed from Closed to Reopened
  • Assignee changed from Jürgen Fischer to Tamas Szekeres

Hi Tamas,

I just re-tested this and it still seems that the estimated metadata parameter is not being used correctly. If the un-tick the "Only look in the geometry_columns metadata table" option large layers take a long time to update in the grid. Also when I add the layer to the canvas it takes a long time too (as it again tries to determine the table geometry type). Once the layer is added to the canvas, if I view the datasource URI in the metadata tab with the layer properties it doesn't have the estimated metadata parameter listed.

I'm using revision e54e87f trunk on winxp


#5 Updated by Paolo Cavallini almost 12 years ago

  • Target version changed from Version 1.8.0 to Version 2.0.0

#6 Updated by Tamas Szekeres almost 11 years ago

  • Status changed from Reopened to Closed

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