Changed where condition of createbasequery and extended timeout of re… - #20
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Changed where condition of createbasequery and extended timeout of re…#20lendrom wants to merge 1 commit into
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…quests Changed 'where' condition from "where":"objectid=objectid" to "where":"1=1" in createBaseQuery method of EsriVectorQueryFactoy. There is a possiblity that table or feature layer's physical structure in the database does not have a field named literally 'objectid'. One example could be query layers published by AGS or external origin tables registered with geodatabase (there are cases, when the field will be named OBJECTID_1 or that some existing column name other than objectid will be used). I'm not sure what is the 'right' way to check the name of a field that has role of objectid but if someone needs to use objectid field name in query, there are several ways to check it . For example, fields that play a role of objectidfield have type set to 'esriFieldTypeOID'. Queries for 'returnIdsOnly' also return property: 'objectIdFieldName', so it could be obtained by querying with 'returnIdsOnly' and where='1=2'. In createBaseQuery method case there's no need to look for objectid field name as 'objectid=objectid' is only an 'empty' condition. The condition "1=1" is more general and should be equally suitable. http://desktop.arcgis.com/en/arcmap/10.3/manage-data/using-sql-with-gdbs/object-id.htm Timeout for queries also changed from 10 to 60 seconds.
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Changes seem to be sensible! Many thanks! |
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…quests
Changed 'where' condition from "where":"objectid=objectid" to "where":"1=1" in createBaseQuery method of EsriVectorQueryFactoy. There is a possiblity that table or feature layer's physical structure in the database does not have a field named literally 'objectid'. One example could be query layers published by AGS or external origin tables registered with geodatabase (there are cases, when the field will be named OBJECTID_1 or that some existing column name other than objectid will be used). I'm not sure what is the 'right' way to check the name of a field that has role of objectid but if someone needs to use objectid field name in query, there are several ways to check it . For example, fields that play a role of objectidfield have type set to 'esriFieldTypeOID'. Queries for 'returnIdsOnly' also return property: 'objectIdFieldName', so it could be obtained by querying with 'returnIdsOnly' and where='1=2'.
In createBaseQuery method case there's no need to look for objectid field name as 'objectid=objectid' is only an 'empty' condition. The condition "1=1" is more general and should be equally suitable.
http://desktop.arcgis.com/en/arcmap/10.3/manage-data/using-sql-with-gdbs/object-id.htm
Timeout for queries also changed from 10 to 60 seconds.