Commit 1b87d95e authored by alexpott's avatar alexpott

Issue #2949378 by masipila, heddn, phenaproxima: Document that SqlBase source...

Issue #2949378 by masipila, heddn, phenaproxima: Document that SqlBase source plugin must use the ignore_map configuraition option if expressions are used in the query
parent 8361c942
......@@ -24,8 +24,11 @@
* - target: (optional) The database target name. Defaults to 'default'.
* - batch_size: (optional) Number of records to fetch from the database during
* each batch. If omitted, all records are fetched in a single query.
* - ignore_map: (optional) Source data is joined to the map table by default.
* If set to TRUE, the map table will not be joined.
* - ignore_map: (optional) Source data is joined to the map table by default to
* improve migration performance. If set to TRUE, the map table will not be
* joined. Using expressions in the query may result in column aliases in the
* JOIN clause which would be invalid SQL. If you run into this, set
* ignore_map to TRUE.
*
* For other optional configuration keys inherited from the parent class, refer
* to \Drupal\migrate\Plugin\migrate\source\SourcePluginBase.
......
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