LiteSpeed for SQL Server 8.8 - Installation Guide

xp_objectrecovery_executeselect

Execute SELECT statement queries against the backup files, which you can use for row-level restores. The SELECT results can be a table in a database, ship directory, or a .csv file.

This topic covers:

• Syntax

• Arguments

• Examples

• Returns

Syntax

View the SELECT query results

EXEC master.dbo.xp_objectrecovery_executeselect
(@filename = 'backup_file_name') [,...n]
[, @filenumber = n]
[, @encryptionkey = 'encryption_key']
[( , @logfilename = 'log_file_name'
[, @stripedlogfilename = 'striped_log_file_name'] [,...n]
[, @logencryptionkey = 'log_encryption_key']
[, @logfilenumber = n ] ) [,...n]]
[, @difffilename = 'diff_file_name'] [,...n]
[, @difffilenumber = n]
[, @diffencryptionkey= 'diff_encrypt_key']
[, @LSM = 'option' ]
{, @scripttext = 'script_text' |
, @scriptfilename = 'script_file_name'}
[, @destinationserver = 'dest_server_name']
[, @tempdirectory = 'recovery_temp_dir']
[, @disablelogprocessing = 0 | 1 ]

Restore the SELECT query results into a database

EXEC master.dbo.xp_objectrecovery_executeselect
(@filename = 'backup_file_name') [,...n]
[, @filenumber = n]
[, @encryptionkey = 'encryption_key']
[( , @logfilename = 'log_file_name'
[, @stripedlogfilename = 'striped_log_file_name'] [,...n]
[, @logencryptionkey = 'log_encryption_key']
[, @logfilenumber = n ] ) [,...n]]
[, @difffilename = 'diff_file_name'] [,...n]
[, @difffilenumber = n]
[, @diffencryptionkey= 'diff_encrypt_key']
[, @LSM = 'option' ]
{, @scripttext = 'script_text' |
, @scriptfilename = 'script_file_name'}
, @destinationtable = 'dest_table_name' 
[, @prefixtableobjects = N'prefix']
[, @suffixtableobjects = N'suffix']
, @destinationdatabase = 'database_name'
[, @destinationserver = 'dest_server_name']
[, @tempdirectory = 'recovery_temp_dir']
[, @onfilegroup = 'table_filegroup_name']
[, @textimageonfilegroup = 'blob_filegroup_name']
[, @disablelogprocessing = 0 | 1 ]

Recover the SELECT query results into a ship directory

EXEC master.dbo.xp_objectrecovery_executeselect
(@filename = 'backup_file_name') [,...n]
[, @filenumber = n]
[, @encryptionkey = 'encryption_key']
[( , @logfilename = 'log_file_name'
[, @stripedlogfilename = 'striped_log_file_name'] [,...n]
[, @logencryptionkey = 'log_encryption_key']
[, @logfilenumber = n ] ) [,...n]]
[, @difffilename = 'diff_file_name'] [,...n]
[, @difffilenumber = n]
[, @diffencryptionkey= 'diff_encrypt_key']
[, @LSM = 'option' ]
{, @scripttext = 'script_text' |
, @scriptfilename = 'script_file_name'}
, @destinationtable = 'dest_table_name' 
[, @prefixtableobjects = N'prefix']
[, @suffixtableobjects = N'suffix']
, @shipdirectory = 'recovery_ship_dir'
[, @onfilegroup = 'table_filegroup_name']
[, @textimageonfilegroup = 'blob_filegroup_name']
[, @disablelogprocessing = 0 | 1 ]

Recover the SELECT query results into a .csv file

EXEC master.dbo.xp_objectrecovery_executeselect
(@filename = 'backup_file_name') [,...n]
[, @filenumber = n]
[, @encryptionkey = 'encryption_key']
[( , @logfilename = 'log_file_name'
[, @stripedlogfilename = 'striped_log_file_name'] [,...n]
[, @logencryptionkey = 'log_encryption_key']
[, @logfilenumber = n ] ) [,...n]]
[, @difffilename = 'diff_file_name'] [,...n]
[, @difffilenumber = n]
[, @diffencryptionkey = 'diff_encrypt_key']
[, @LSM = 'option' ]
{, @scripttext = 'script_text' |
, @scriptfilename = 'script_file_name'}
, @destinationfilename = 'csv_file_name'
[, @disablelogprocessing = 0 | 1 ]

If the backup is stored in the cloud (Amazon S3) these parameters help us with access

[, @CloudBucketName = N'aabucket1']
[, @CloudAccessKey = N'***']
[, @CloudSecretKey = N'***']
[, @CloudRegionName = N'us-west-2']
[, @ProxyHost = N'proxy.sitelocal']
[, @ProxyPort = 8080]
[, @ProxyLogin = N'DOMAIN\temp-xyz-MYtester']
[, @ProxyPassword = N'***']

If the backup is stored in the cloud (Microsoft Azure) these parameters help us with access

@CloudVendor = N'AzureBlob',
@CloudBucketName = N'test',
@CloudAccessKeyEnc = N'*******',
@CloudSecretKeyEnc = N'******',
@UseSSL = 1,
@affinity = 0,
@logging = 0

Arguments

Tips:

• To see the list of accepted arguments and data types for arguments, execute the following:
  exec master.dbo.<procedure_name> show_help

• To convert the script for use with the command-line utilities, execute the following:
  exec master.dbo.<procedure_name> show_cmd, <xp_arguments>

@backend

Object Level Recovery can restore tables using two different internal techniques to handle the record inserts.

The first and default method uses BCP files and a TSQL BULK INSERT statement. Object Level Recovery will write a BCP format file and an accompanying binary data file to the local file system. These files may become very large depending on the table size and will require permissions to write to a temporary directory. The default TEMP location can be set by using the @TempDirectory parameter or by setting a permanent temp location in the LiteSpeed configuration file.

An alternate insertion method can be specified to use Sql Server’s Sql Native Client capabilities. This method inserts row-data directly into the destination database bypassing any storage on the local file-system. To enable this method, use the parameter @backend='SQLNativeClient' (or -b 1 from the command line). To make this the default method set the value “BackEnd=SQLNativeClient” in the Object Level Recovery section of the LiteSpeed configuration file.

Regardless of the insertion method used, the batch size can be globally managed by setting the value “BulkImportBatchSize=<N>”. This will set the number of row inserts for each batched transaction.

@CloudAccessKey

The @CloudAccessKey argument specifies the name of the unique Cloud Web Service alphanumeric access key that identifies each user. The selections include Amazon Access Key, Azure Account Name, Google e-mail styled account.

@CloudAccessKeyEnc

The @CloudAccessKeyEnc argument specifies the name of the encrypted unique Cloud Web Service alphanumeric access key that identifies each user.

@CloudBucketName

The @CloudBucketName argument specifies the name of the container for cloud objects. Bucket names must be at least 3 and no more than 63 characters long. The selections are Amazon Bucket Name, Azure Container Name, Google Bucket Name. Google Bucket Name requirements are described at https://cloud.google.com/storage/docs/naming.

@CloudGovRegion

The @CloudGovRegion argument enables a special restricted region for the US Government use in Amazon S3 and Azure Clouds. This argument accepts one of the following values:

• 0—Do not use government cloud (default)
• 1—Use government cloud

@CloudRegionName

The @CloudRegionName argument specifies the name of the Cloud Web Service region to use for a bucket. Example values are but not limited to: us-east-1, us-east-2, us-west-1, us-west-2, ca-central-1, eu-central-1, eu-west-1, eu-west-2, ap-south-1, ap-southeast-1, ap-southeast-2, ap-northeast-1, ap-northeast-2, sa-east-1, N'Germany' and N'China'.

@CloudSecretKey

The @CloudSecretKey argument specifies the name of the Cloud Web Service secret key that is assigned when you initially get a Cloud account.

@CloudSecretKeyEnc

The @CloudSecretKeyEnc argument specifies the name of the encrypted Cloud Web Service secret key that is assigned when you initially get a Cloud account.

@CloudVendor

The @CloudVendor argument specifies the name of the cloud service provider. The argument accepts one of the following values: "AmazonS3", "AzureBlob" or "GoogleStorage".

@destinationdatabase

Specifies the destination database.

@destinationfilename

Name of comma separated file (.csv) that is generated instead restoring into a database. This is an ad hoc solution for users want to see the restored data in Excel. You can only use this argument for text data.

@destinationserver

Name of the destination server.

@destinationtable

Specifies the name of the destination table. LiteSpeed will not overwrite an existing table. If you select the same server instance and database as the original table, you must use a different table name.

NOTE: For Execute-Select operations, LiteSpeed will attempt to insert (append) all selected records into existing table.

@diffencryptionkey

Value used to generate the encryption key for the encryption algorithm. If you do not supply encryption key, then the program will not encrypt the backup. If you use the wrong encryption key, the restore will fail.

Caution: When encrypting data, take care not to lose the encryption key; a backup cannot be restored or recovered without the original encryption key.

Example of key: 'Mypassword'

Equivalent to @encryptionkey, but used for differential backups instead of full backup files.

@difffilename

Name of backup file to restore. Used for differential backups instead of full backup files. You can supply multiple instances of this argument.

@difffilenumber

Identifies the backup file within the backup set. Equivalent to @filenumber, but used for differential backups instead of full backup files.

@disablelogprocessing

Instructs LiteSpeed to skip all transaction log backups and tail log processing. This may improve read and recovery times. This argument accepts one of the following values:

• 0—False (Default).
• 1—True. LiteSpeed will entirely ignore any transaction log backups specified and will not process the tail log.

@encryptionkey

Value used to generate the encryption key for the encryption algorithm. If you do not supply encryption key, then the program will not encrypt the backup. If you use the wrong encryption key, the restore will fail.

Caution: When encrypting data, take care not to lose the encryption key; a backup cannot be restored or recovered without the original encryption key.

Example of key: 'Mypassword'

@filename

Specifies a backup location (e.g. C:\backups\AdventureWorks.bak). This argument accepts network destinations. You can supply multiple instances of this argument to use stripe backups.

@filenumber

Specifies the particular backup to use when recasting, restoring, extracting or reading from files with multiple appended backups. You can run xp_restore_headeronly to query the files contained within the backup set given by backup_file_name.

@KeepComputedColumns

Instructs LiteSpeed to keep the computed columns with the object restore. This argument accepts one of the following values:

• 0—False
• 1—True

@logencryptionkey

Value used to generate the encryption key for the encryption algorithm. If you do not supply encryption key, then the program will not encrypt the backup. If you use the wrong encryption key, the restore will fail.

Caution: When encrypting data, take care not to lose the encryption key; a backup cannot be restored or recovered without the original encryption key.

Example of key: 'Mypassword'

Equivalent to @encryptionkey, but used for transaction log backups.

@logfilename

Syntax

@logfilenumber

@LSM

Specifies handling for OLR LSM mapfile(s).

• Create—Reads backup and creates a new mapfile. It will ignore attached LSM.
• Keep—Does not delete mapfile(s) when complete.
• Delete—Always deletes mapfile(s) when complete.

@OLRUDT

Create table script:

• 0—Off. Create table with native types, if possible; othervise (CLR UDT) create with UDT.
• 1—On. Create table with UDT (Default).

@onfilegroup

Filegroup with the object to restore.

@PersistLogProcessing

Instructs LiteSpeed to persist log processing, so the same database backup does not have to be processed for each Object Level Recovery operation. This argument accepts one of the following values:

• 0—False (Default).
• 1—True. LiteSpeed will persist transaction log backups specified and the tail log for future use. This option can offer a huge performance gain for working with databases with large tail logs that could possibly take a long time to process.

@ProxyHost

The @ProxyHost argument is optional and specifies the name of the proxy host name that is running the proxy server.

@ProxyLogin

The @ProxyLogin argument is optional and specifies the proxy server login credential.

@ProxyPassword

The @ProxyPassword argument is optional and specifies the proxy server password credential.

@ProxyPasswordEnc

The @ProxyPasswordEnc argument is optional and specifies the encrypted proxy server password credential.

@ProxyPort

The @ProxyPort argument is optional and contains the port number of the proxy server. The TCP/IP port values can be 1-65535.

@scriptfilename

Name of the SELECT script file to be executed.

@scripttext

The text of the SELECT script to be executed. The SELECT statement is imbedded in a single-quoted string literal, and all single-quoted string literals in the SELECT statement need to be double single-quoted.  For example:

@scripttext = 'SELECT * FROM dbo.Customers WHERE City=''London'''

The single quoted string literal 'London' is double single-quoted.

You can also use SET QUOTED_IDENTIFIER OFF to allow double quotes. For example:

SET QUOTED_IDENTIFIER OFF
EXEC xp_objectrecovery_executeselect
@filename = 'C:\MSSQL\Backup\MyDB_Backup.BAK'
, @scripttext = "SELECT * FROM dbo.Customers WHERE City='London'"
, @destinationtable = 'dbo.CustomersInLondon'
, @destinationdatabase = 'MyDB'

@shipdirectory

Name of the ship directory. Use this argument when you want to restore the object later or at a different physical location.  This argument creates the following files in the ship directory:

• CREATE <object_name>.sql

• BULK INSERT <object_name>.sql

• <object_name>.fmt

• <object_name>.bcp

To restore the object, run the CREATE file first, and then run the BULK INSERT file. You will need to slightly modify the BULK INSERT file because of the .fmt and .bcp file path names.

Tip: You can zip the files and send them to someone else.

@stripedlogfilename

Specifies the striped log file name.

NOTE: The striped files for a given log backup must be specified before the next log backup set is specified.

@tempdirectory

Specifies a temporary directory for use with Object Level Recovery. Use this argument when the default Windows temp directory does not have enough free disk space for the restore process.

@textimageonfilegroup

Destination TEXTIMAGE_ON filegroup name. Used to restore a BLOB (binary large object).

@UseSSL

The @UseSSL argument specifies that the connection uses SSL security. This argument accepts one of the following values:

• 0—Do not use SSL
• 1—Use SSL (default)

@with

Each @with argument should be a syntactically complete and correct statement. Please refer to the SQL Server Transact-SQL backup and restore documentation for the syntax and usage.

The supported formats are:

• @with='PARAMETER'
• @with='PARAMETER=''accepted_value'''

NOTES:

• Extended stored procedure arguments are limited to 255 characters. If you need more than 255 characters, use multiple @with arguments.
• Do not supply the @with parameter if no additional features are required.

This extended stored procedure accepts the following @with parameters:

Examples

View the SELECT query results

xp_objectrecovery_executeselect
@filename = 'D:\temp\LiteSpeedLocal.bak'
, @scripttext = 'select top (4)* from dbo.LiteSpeedActivity'

Restore the SELECT query results into a database using inline script

EXEC master.dbo.xp_objectrecovery_executeselect
@filename = 'C:\MSSQL\Backup\MyDB_Backup.BAK'
, @scripttext = 'SELECT * FROM dbo.Customers WHERE City=''London'''
, @destinationtable = 'dbo.CustomersInLondon'
, @destinationdatabase = 'MyDB'

Restore the SELECT query results into a database using script file

EXEC master.dbo.xp_objectrecovery_executeselect
@filename = 'C:\MSSQL\Backup\MyDB_Backup.BAK'
, @scriptfilename = 'C:\temp\SelectCustomerFromLondon.sql'
, @destinationtable = 'dbo.CustomersInLondon'
, @destinationdatabase = 'MyDB'
, @destinationserver = 'MyMachine\SQL2000'
, @tempdirectory = 'D:\temp'
, @onfilegroup = 'Secondary'
, @textimageonfilegroup = 'Secondary'

Restore the SELECT query results into ship directory

EXEC master.dbo.xp_objectrecovery_executeselect
@filename = 'C:\MSSQL\Backup\MyDB_Backup.BAK'
, @scriptfilename = 'C:\temp\SelectCustomerFromLondon.sql'
, @destinationtable = 'dbo.CustomersInLondon'
, @shipdirectory = 'C:\temp\London'

Restore the SELECT query results into a .csv file

EXEC master.dbo.xp_objectrecovery_executeselect
@filename = 'C:\MSSQL\Backup\MyDB_Backup.BAK'
, @scriptfilename = 'C:\temp\SelectCustomerFromLondon.sql'
, @destinationfilename = 'C:\temp\LondonCustomer.csv'

Returns

0 (success) or non-zero (failure). Return codes represent the native error number returned from SQL Server for any errors encountered during the operation.

To capture the output message, run the following:

declare @rmsg varchar(999)
exec master..<procedure_name> <arguments>, @resultmsg=@rmsg output
select @rmsg

To capture the output message and the result code, run the following:

declare @rc int
declare @rmsg varchar(999)
exec master..<procedure_name> <arguments>, @resultmsg=@rmsg output, @resultcode=@rc output
select @rc, @rmsg

Related Topics

About Using Extended Stored Procedures

xp_objectrecovery

xp_objectrecovery_createscript

xp_objectrecovery_viewcontents