CS as of 1.4.2 doesn't support multiple-table UPDATE feature.
Given that now CS has a number of requirements imposed by JOIN-s we can only support multiple-table UPDATE-s that satisfy this requirements.
Here are the current limitations:
- CS can execute only equi-JOIN operations
- It can't have a circular graph of JOIN keys(the workaround is to use functional JOIN keys)
Consider the example of multiple-tables UPDATE-s CS could support: