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sysdac_history_internal (Transact-SQL)

Contains information about the actions taken to manage data-tier applications (DAC). This table is stored in the dbo schema of the msdb database.

Column name

Data type

Description

action_id

int

Identifier of the action

sequence_id

int

Identifies a step within an action.

instance_id

uniqueidentifier

Identifier of the DAC instance. This column can be joined on the instance_id column in dbo.sysdac_instances (Transact-SQL).

action_type

tinyint

Identifier of the action type:

0 = deploy

1 = create

2 = rename

3 = detach

4 = delete

action_type_name

varchar(19)

Name of the action type:

deploy

create

rename

detach

delete

dac_object_type

tinyint

Identifier of the type of object affected by the action:

0 = dacpac

1 = login

2 = database

dac_object_type_name

varchar(8)

Name of the type of object affected by the action:

dacpac = DAC instance

login

database

action_status

tinyint

Code identifying the current status of the action:

0 = pending

1 = success

2 = fail

action_status_name

varchar(11)

Current status of the action:

pending

success

fail

Required

bit

Used by the Database Engine when rolling back a DAC operation.

dac_object_name_pretran

sysname

Name of the object before the transaction containing the action is committed. Used only for databases and logins.

dac_object_name_posttran

sysname

Name of the object after the transaction containing the action is committed. Used only for databases and logins.

sqlscript

nvarchar(max)

Transact-SQL script that implements an action on a database or login.

payload

varbinary(max)

DAC package definition saved in a binary encoded string.

Comments

varchar(max)

Records the login of a user who accepted potential data loss in a DAC upgrade.

error_string

nvarchar(max)

Error message generated if the action encounters an error.

created_by

sysname

The login that launched the action that created this entry.

date_created

datetime

The date and time this entry was created.

date_modified

datetime

The date and time the entry was last modified.

DAC management actions, such as deploying or deleting a DAC, generate multiple steps. Each action is assigned an action identifier. Each step is assigned a sequence number and a row in sysdac_history_internal, where the status of the step is recorded. Each row is created when the action step starts, and is updated as needed to reflect the status of the operation. For example, a deploy DAC action could be assigned action_id 12 and get four rows in sysdac_history_internal:

action_id

sequence_id

action_type_name

dac_object_type_name

12

0

create

dacpac

12

1

create

login

12

2

create

database

12

3

rename

database

DAC operations, such as delete, do not remove rows from sysdac_history_internal. You can use the following query to manually delete the rows for DACs no longer deployed on an instance of the Database Engine:

DELETE FROM msdb.dbo.sysdac_history_internal
WHERE instance_id NOT IN
   (SELECT instance_id
    FROM msdb.dbo.sysdac_instances_internal);

Deleting rows for active DACs does not impact DAC operations; the only impact is that you will not be able to report the full history for the DAC.

NoteNote

Currently, there is no mechanism for deleting sysdac_history_internal rows on Windows Azure SQL Database.

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