Performance issue with sync script adding columns with default value (4326444)

The sync script generated by the Compare Schema module in Toad for adding columns with default value causes performance issue or table lock for large table.

Submitted enhancement requests:

Idea#337 -http://toadfororacle.ideascale.com/a/dtd/Add-column-to-a-table-with-default-value-requires-improvement/108344-8477
  
Idea#338 -http://toadfororacle.ideascale.com/a/dtd/Adding-multiple-columns-with-default-value-need-improvement/108388-8477

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