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Add note about data changes

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Peter J. Holzer 2022-02-02 14:41:05 +01:00
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@ -54,3 +54,9 @@ I think we should have empty nodes which are just used to group dependencies,
e.g. something like `table_x_complete` which depends on `table_x` and all its
columns, contraints, indexes, data, etc. so that other nodes can just depend on
`table_x_complete` and don't have to bother about the details.
I don't have a good ideas for data changes yet. For example I may want
to change the value of a (non-PK) column for one or more rows. Easy in
SQL, not easy in a generic way without reinventing SQL.
Idea for the simple case: data_update key={} new={}.
Maybe allow arbitrary SQL for the complex case. But must be idempotent.