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we now can have several data modification collections in one query.

This commit is contained in:
Wilfried Goesgens 2017-03-17 11:05:21 +01:00
parent 3df8b676ee
commit 77c0dcc0d6
1 changed files with 4 additions and 5 deletions
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9
Documentation/Books/AQL/DataQueries.mdpp
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@ -286,11 +286,10 @@ must be known to the AQL executor at query-compile time and cannot change at
runtime. Using a bind parameter to specify the
[collection name](../Manual/Appendix/Glossary.html#collection-name) is allowed.
Data-modification queries are restricted to modifying data in a single
collection per query. That means a data-modification query cannot modify
data in multiple collections with a single query. It is still possible (and
was shown above) to read from one or many collections and modify data in another
within the same query.
Data-modification queries are restricted to a single modify operation per collection.
That means you may not place several `REMOVE` or `UPDATE` statements for one collection
in one query. In case you have several places in a query providing you lists of documents
to delete, collect them in an array so you can remove them all at once.
Only a single data-modification operation can be used per AQL query. Data-modification
queries cannot be used inside subqueries. Data-modification operations can optionally