Bug report #21963
graphical identify and select feature do not work on Postgis-sql layer
| Status: | Closed | ||
|---|---|---|---|
| Priority: | Normal | ||
| Assignee: | - | ||
| Category: | Data Provider/PostGIS | ||
| Affected QGIS version: | 3.6.2 | Regression?: | No |
| Operating System: | windows 7 | Easy fix?: | No |
| Pull Request or Patch supplied: | No | Resolution: | invalid |
| Crashes QGIS or corrupts data: | No | Copied to github as #: | 29778 |
Description
I have a SQL-defined postgis layer defined by this statement:
((((SELECT row_number() over () AS uid,* FROM (SELECT generate_series(0, laenge_asb,100) AS station, st_astext(
ST_LineInterpolatePoint(
geometrie,
generate_series(0, laenge_asb,100):: double precision /(laenge_asb)
)
) FROM "erhaltung"."abschnitt" ) AS subq_1 ) ) ) )
abschnitt is a table in my postgis database with a LineStringZM geometry of SRID 4326 stored in the geometrie column that has an integer laenge_asb column
When I try to identify or select features in it by using the identify or select tool, the PostGIS log tab contains this error and no feature is identified or selected:
2019-04-30T14:09:40 WARNING Fetching from cursor qgis_144 failed
Database error: ERROR: Operation on mixed SRID geometries
2019-04-30T14:09:40 WARNING Query: CLOSE qgis_144 returned 7 [ERROR: current transaction is aborted, commands ignored until end of transaction block
]
2019-04-30T14:09:40 WARNING 1 cursor states lost.
SQL: CLOSE qgis_144
Result: 7 (ERROR: current transaction is aborted, commands ignored until end of transaction block
)
History
#1
Updated by Sebastian Brocks over 5 years ago
This looks like the issue in issue #4470
#2
Updated by Jürgen Fischer over 5 years ago
- Status changed from Open to Feedback
Why are you using st_astext?
#3
Updated by Sebastian Brocks over 5 years ago
No particular reason, I'm a relative newbie with regard to postgis and QGIS. Changing to st_aswekt makes identify and select work correctly.
#4
Updated by Jürgen Fischer over 5 years ago
- Resolution set to invalid
- Status changed from Feedback to Closed
Sebastian Brocks wrote:
No particular reason, I'm a relative newbie with regard to postgis and QGIS. Changing to st_aswekt makes identify and select work correctly.
you shouldn't need either st_astext or st_ewkt - the geometry ST_LineInterpolatePoint produces should work as it, but `st_astext` will essentially just remove the SRID and in turn cause the error.