Error Importing Azure bacpac file to local db error incorrect syntax near EXTERNAL

问题

When importing db fro azure bacpac file to local sql server 2016 I'm geting the following error.

Error SQL72014: .Net SqlClient Data Provider: Msg 102, Level 15, State 1, Line 1 Incorrect syntax near 'EXTERNAL'.
Error SQL72045: Script execution error.  The executed script: CREATE EXTERNAL DATA SOURCE [BoxDataSrc]
    WITH (
    TYPE = RDBMS,
    LOCATION = N'MYAZUREServer.database.windows.net',
    DATABASE_NAME = N'MyAzureDb',
    CREDENTIAL = [SQL_Credential]
    );

(Microsoft.SqlServer.Dac)

回答1:

I ran into this same issue today. Since "WITH(TYPE = RDBMS)" is only applicable to Azure SQL DB, we get the error when attempting to import the bacpac into SQL Server 2017 on-premise. I did find a solution thanks to this article:

https://blogs.msdn.microsoft.com/azuresqldbsupport/2017/08/16/editing-a-bacpac-file/

The relevant steps rewritten here:

Make a copy of the bacpac file (for safety in case of errors).
Change the file extension to zip, then decompress it into a folder. Surprisingly, a bacpac is actually just a zip file, not something proprietary and hard to get into.

Find the model.xml file and edit it to remove the section that looks like this:

<Element Type="SqlExternalDataSource" Name="[BoxDataSrc]">
    <Property Name="DataSourceType" Value="1" />
    <Property Name="Location" Value="MYAZUREServer.database.windows.net" />
    <Property Name="DatabaseName" Value="MyAzureDb" />
    <Relationship Name="Credential">
        <Entry>
            <References Name="[SQL_Credential]" />
        </Entry>
    </Relationship>
</Element>

If you have multiple external data sources of this type, you will pobably need to repeat step 3 for each one. I only had one.
Save and close model.xml.

Now you need to re-generate the checksum for model.xml so that the bacpac doesn't think it was tampered with (since you just tampered with it). Create a PowerShell file named computeHash.ps1 and put this code into it.

$modelXmlPath = Read-Host "model.xml file path"
$hasher = [System.Security.Cryptography.HashAlgorithm]::Create("System.Security.Cryptography.SHA256CryptoServiceProvider")
$fileStream = new-object System.IO.FileStream ` -ArgumentList @($modelXmlPath, [System.IO.FileMode]::Open)
$hash = $hasher.ComputeHash($fileStream)
$hashString = ""
Foreach ($b in $hash) { $hashString += $b.ToString("X2") }
$fileStream.Close()
$hashString

Run the PowerShell script and give it the filepath to your unzipped and edited model.xml file. It will return a checksum value.
Copy the checksum value, then open up Origin.xml and replace the existing checksum, toward the bottom on the line that looks like this:
```
<Checksum Uri="/model.xml">9EA0F06B282D4F42955C78A98822A31AA0ED0225CB131B8759379055A482D01F</Checksum>
```
Save and close Origin.xml, then select all the files and put them into a new zip file and rename the extension to bacpac.

Now you can use this new bacpac to import the database without getting the error. It worked for me, it could work for you, too.

回答2:

As per @SQLDoug's answer, this can happen if your Azure SQL database has External Tables (i.e. linked tables from other databases). You can check that in SSMS here:

Addendum to accepted answer

If you delete those external tables' datasouces you'll also need to delete the SqlExternalTable elements in the model.xml file that were using those datasources too, they'll look something like this:

   <Element Type="SqlExternalTable" Name="[dbo].[DeliveryMethodsRestored]">
        <Property Name="ExternalSchemaName" Value="dbo" />
        <Property Name="ExternalObjectName" Value="DeliveryMethods" />
        <Property Name="IsAnsiNullsOn" Value="True" />
        <Property Name="IsQuotedIdentifierOn" Value="False" />
        <Relationship Name="Columns">
            <Entry>
                <Element Type="SqlSimpleColumn" Name="[dbo].[DeliveryMethodsRestored].[DeliveryMethodId]">
                    <Property Name="IsNullable" Value="False" />
                    <Relationship Name="TypeSpecifier">
                        <Entry>
          SNIP....
    </Element>

If you do a search for 'SqlExternalTable' in model.xml you'll find them all easily.

Alternative approach to solving this issue

Rather than correcting the bacpac after downloading it, the other way to deal with this is simply to remove the external tables before creating the bacpac i.e.:

Restore a copy of your database to a separate database
Delete the External Tables in the restored copy

Delete the External Data Sources in the restored copy

Create the bacpac from that restored copy
Delete the copy database

This approach has the advantage that you aren't creating the bacpac from the live database, which apparently 'can cause the exported table data to be inconsistent because, unlike SQL Server's physical backup/restore, exports do not guarantee transactional consistency'.

If that's something you're likely to do a that a lot you could probably write scripts to automate most of the above steps.

回答3:

Elastic Database queries are supported only on Azure SQL Database v12 or later, Not on local server. https://msdn.microsoft.com/en-us/library/dn935022.aspx

回答4:

Same error code with different error.

Could not import package. Warning SQL72012: The object [PreProd_Data] exists in the target, but it will not be dropped even though you selected the 'Generate drop statements for objects that are in the target database but that are not in the source' check box.

Warning SQL72012: The object [PreProd_Log] exists in the target, but it will not be dropped even though you selected the 'Generate drop statements for objects that are in the target database but that are not in the source' check box.

Error SQL72014: .Net SqlClient Data Provider: Msg 102, Level 15, State 1, Line 5 Incorrect syntax near 'OPTIMIZE_FOR_AD_HOC_WORKLOADS'.

Error SQL72045: Script execution error. The executed script: IF EXISTS (SELECT 1 FROM [master].[dbo].[sysdatabases] WHERE [name] = N'$(DatabaseName)') BEGIN ALTER DATABASE SCOPED CONFIGURATION SET OPTIMIZE_FOR_AD_HOC_WORKLOADS = ON; END

Solution

this blog will help to edit model.xml to remove Relationship command for OPTIMIZE_FOR_AD_HOC_WORKLOADS which is not necessary in SQL Server 2017 Instance.

https://blogs.msdn.microsoft.com/azuresqldbsupport/2017/08/16/editing-a-bacpac-file/

Make a copy of the bacpac file (for safety in case of errors). Change the file extension to zip, then decompress it into a folder. Surprisingly, a bacpac is actually just a zip file, not something proprietary and hard to get into. Find the model.xml file and edit it to remove the section that looks like this:

The relevant steps rewritten here:

Make a copy of the bacpac file (for safety in case of errors).
Change the file extension to zip, then decompress it into a folder. Surprisingly, a bacpac is actually just a zip file, not something proprietary and hard to get into.

Find the model.xml file and edit it to remove the section that looks like this:

<Relationship Name="GenericDatabaseScopedConfigurationOptions">
    <Entry>
        <References Name="[OPTIMIZE_FOR_AD_HOC_WORKLOADS]" />
    </Entry>
</Relationship>

Remove following block from model.xml

<Element Type="SqlGenericDatabaseScopedConfigurationOptions" Name="[OPTIMIZE_FOR_AD_HOC_WORKLOADS]">
    <Property Name="GenericValueType" Value="2" />
    <Property Name="GenericValue" Value="ON" />
</Element>

Save and close model.xml.
Now you need to re-generate the checksum for model.xml so that the bacpac doesn't think it was tampered with (since you just tampered with it). Create a PowerShell file named computeHash.ps1 and put this code into it.
Run the PowerShell script and give it the filepath to your unzipped and edited model.xml file. It will return a checksum value.
Copy the checksum value, then open up Origin.xml and replace the existing checksum.
Save and close Origin.xml, then select all the files and put them into a new zip file and rename the extension to bacpac.

Now bacpack file will is ready to import and it work for me.

Thanks.

来源：https://stackoverflow.com/questions/42028861/error-importing-azure-bacpac-file-to-local-db-error-incorrect-syntax-near-extern

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