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Be smart when adding limit: followup #8092

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elpaso committed Sep 22, 2020
1 parent 1c1febc commit ef02c542522c96508d80e153bc5e90d4172a79b8
Showing with 2 additions and 1 deletion.
  1. +2 −1 python/plugins/db_manager/db_plugins/postgis/connector.py
@@ -121,7 +121,8 @@ def description(self):
uri = QgsDataSourceUri(self.connection.uri())

# TODO: make this part provider-agnostic
uri.setTable('(SELECT row_number() OVER () AS __rid__, * FROM (' + self.sql + ' LIMIT 1) as foo)')
sql = self.sql if self.sql.upper().find(' LIMIT ') >= 0 else self.sql + ' LIMIT 1 '
uri.setTable('(SELECT row_number() OVER () AS __rid__, * FROM (' + sql + ') as foo)')
uri.setKeyColumn('__rid__')
# TODO: fetch provider name from connection (QgsAbstractConnectionProvider)
# TODO: re-use the VectorLayer for fetching rows in batch mode

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