如何使用DACPAC DeploymentPlanModifier删除特定的数据丢失警告？

Question

I have a DeploymentPlanModifier implementation that, for simplicity, remove any AlterElementStep from the deployment plan that have AlterTableDropTableElementStatement script statements in it.

This makes sure that no ALTER TABLE ... DROP COLUMN ... is generated in the deployment script. The deployment script and the deployment report, however, still gets generated with data loss checks (on the former) and warnings (on the latter) due to removed columns.

For the deployment script checks, I found that I could parse the script generated by DeploymentScriptSteps and remove those steps associated to the data loss check for the columns I did not drop. However I'm still looking for a similar alternative for the deployment report.

I do not want to disable data loss warnings/checks altogether. I just want to manipulate the checks/warnings associated to the columns I am touching as part of my plan modifications.

Is there a better way to remove data loss checks and warnings from both artifacts without manually parsing the generated output?

Answer 1

I've got a deployment contributor that does a similar thing (don't drop columns) and someone submitted a pull request where they did the same thing and th only way they could do it was to parse the generated output

This is how he did it:

https://agilesqlclub.codeplex.com/SourceControl/latest#SqlPackageFilter/Filter/DataLossCheckStep.cs

Ed