ryanrodemoyer / dacpac_merge

dacpac_merge

Build Steps

1. Load the solution (src\dacpacs.sln) and build.
2. Open the LINQPad file (src\dacpac_merge.linq) and run.
3. Generate the deployment script by running the scripts\sqlpackage_script.bat file.
4. Open the file scripts\merged.output.sql to see the contents of the merged dacpacs.

Attribution

Based on the code at https://github.com/GoEddie/DacpacMerge / https://the.agilesql.club/2019/03/how-can-we-merge-multiple-dacpacs-into-one/

Merging Dacpacs

This merge strategy currently uses the "last in wins" methodology. Consider that Database1.dacpac is the "base" dacpac and then we overlay all user defined objects from Database2.dacpac. If an object is defined in both dacpacs then the object from the last dacpac is present in the merged dacpac.

Pre and Post deployment scripts are different. Each script is built during the initial build of Database1.dacpac and Database2.dacpac. Consider these files to be "compiled" and we cannot reflect in to individual scripts that were used to generate. In this case, our easiest option is to determine the order in which the scripts can run and then simply append them together in that order.

A secondary option exists if we could reliably parse the SQL script to extract the individual scripts. In this case, we could more intelligently merge the scripts together.

The final output is available at https://github.com/ryanrodemoyer/dacpac_merge/blob/main/scripts/merged.output.sql.

Database1.dacpac

dbo.Podcasts (net new)

CREATE TABLE [dbo].[Podcasts]
(
	[Id] INT NOT NULL PRIMARY KEY IDENTITY(1,1), 
    [PodcastName] NVARCHAR(50) NULL, 
    [ReleaseDate] DATETIME2 NULL
)

GO

CREATE INDEX [IX_Podcasts_PodcastName] ON [dbo].[Podcasts] ([PodcastName])

dbo.Users (exists in both)

CREATE TABLE [dbo].[Users]
(
	[Id] INT NOT NULL PRIMARY KEY, 
    [Name] VARCHAR(100) NULL, 
    [DateJoined] DATETIME NULL
)

dbo.PodcastUpsert (net new, stored procedure)

CREATE PROCEDURE [dbo].[PodcastsUpsert]
	@podcastName nvarchar(50)
	, @releaseDate datetime2
AS
insert dbo.Podcasts (PodcastName,ReleaseDate)
values (@podcastName,@releaseDate)

Script.PreDeployment.sql (Pre Deploy action)

print 'Database1 PreDeploy'

Script.PostDeployment.sql (Post Deploy action)

print 'Database1 PostDeploy'

Database2.dacpac

dbo.Users (exists in both)

CREATE TABLE [dbo].[Users]
(
	[Id] INT NOT NULL PRIMARY KEY, 
    [Name] VARCHAR(100) NULL, 
    [DateJoined] DATETIME NOT NULL, 
    [AccountExpires] DATETIME NULL
)

dbo.VideoGames (net new)

CREATE TABLE [dbo].[VideoGames]
(
	[Id] INT NOT NULL PRIMARY KEY, 
    [VideoGameName] NVARCHAR(50) NULL, 
    [ReleaseYear] INT NULL, 
    [GameSystem] VARCHAR(20) NOT NULL, 
    [IsFPS] BIT NULL
)

dbo.YoutubeChannels (net new)

CREATE TABLE [dbo].[YoutubeChannels]
(
	[Id] INT NOT NULL PRIMARY KEY IDENTITY, 
    [ChannelName] NVARCHAR(50) NULL, 
    [Subscribers] INT NULL
)

GO

CREATE INDEX [IX_YoutubeChannels_ChannelName] ON [dbo].[YoutubeChannels] ([ChannelName])

dbo.ChannelsUpsert (net new, stored procedure)

CREATE PROCEDURE [dbo].[ChannelsUpsert]
	@channelName nvarchar(50)
	, @subscribers int
AS
insert dbo.YoutubeChannels (ChannelName,Subscribers)
values (@channelName,@subscribers)

dbo.VideoGamesInsert (net new, stored procedure)

CREATE PROCEDURE [dbo].[VideoGamesInsert]
	@videoGameName nvarchar(50)
	, @releaseYear int
	, @gameSystem varchar(20)
	, @isFps bit
AS
insert dbo.VideoGames (VideoGameName,ReleaseYear,GameSystem,IsFPS)
values (@videoGameName,@releaseYear,@gameSystem,@isFps)

Script.PreDeployment.sql (Pre Deploy action)

print 'Database2 PreDeploy'

Script.PostDeployment.sql (Post Deploy action)

print 'Database2 PostDeploy'