[mssql] Allow SQL queries as layer sources #60728
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Lightens load when browsing SQL Server connections via browser
And fix failures
Follows the approach used by eg the postgres provider, where a mssql layer can specify an arbitrary SQL query to use as the layer's source instead of a table. This is done by using the URI form: table="(SELECT ...)" key='primary_key' srid=4326 type=POINT The query MUST be wrapped in (), and the primary key and geometry properties MUST be set in the URI. Note that SQL Server requirements mandate that EVERY column in the query must have an explicit name/alias set, or the database queries will fail. Sponsored by City of Canning
Allows loading SQL Server queries as map layers from the browser, and updating the SQL for existing query layers Sponsored by City of Canning
nyalldawson
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Allows loading SQL Server queries as map layers from the browser, and updating the SQL for existing query layers
Sponsored by City of Canning
Fixes #19301
(temporarily contains various other open PRs with fixes for the mssql provider)