* String columns with a length higher then 4000 are converted into a CLOB columns automagically - we have to respect this when migrating
* Adding schema migration tests to prevent unnecessary and non-sense migration steps
Fix Oracle autoincrement and unsigned handling
* Fix sqlite integer type for autoincrement
* Use lower case table names - fixes pg
* Fix postgres with default -1 - this only affect pg 9.4 servers - 9.5 seems to work fine
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