Fix creating SQLServerDataTable being O(n^2) issue#514

Merged

peterbae merged 6 commits intomicrosoft:devfrom peterbae:SQLServerDataTableImprovement-497

Oct 11, 2017

+46-24

Commits on Sep 26, 2017

Implement checkDuplicateColumnName to check duplicate columns
peterbae
committed

Commits on Sep 27, 2017

Commits on Oct 5, 2017

remove null check and change Set object name
peterbae
committed

Commits on Oct 6, 2017

Refactoring the logic for checking duplicate column into Util class and adding a test case for this
peterbae
committed