Add possibility to use a sql file to sql key of 'Data' parameter (entity sheet)

[abennici]

We have only possibility to write sql query chain for this key but not have the capacity to join a sql file including this query. For long and complexe query chain, this alternative method could be more easily for user.

[eblondel]

Can you clarify if you refer to the source or the upload? For source we can already have a SQL file as source file, geoflow detects SQL type and tries to execute the query to read the data source. For upload, we only have a "sql" property (that we need to think in renaming.. ) are you referring to this, and supporting a reference a SQL script file for upload?

[abennici]

My request refer to the upload call "sql". The sql property (or renaming) could by update to support the two type of declaration under ?

e.g. sql: SELECT * FROM mydata_
or
e.g. sql: myUploadRequest@http://mysql.sql

[eblondel]

For that we already have uploadSource, but we don't think we manage Sql files here (at least not yet). by analogy we should have uploadSourceSql as renaming of sql. It would make sense to have management of SQL files for uploadSource, as content of the sql can be large, and doesn't help readability of Data column