مشاركة عبر

  • مقالة

sp_getdefaultdatatypemapping (Transact-SQL)

Returns information on the default mapping for the specified data type between Microsoft SQL Server and a non-SQL Server database management system (DBMS). This stored procedure is executed at the Distributor on any database.

Topic link iconTransact-SQL Syntax Conventions

Syntax

sp_getdefaultdatatypemapping [ @source_dbms= ] 'source_dbms' 
    [ , [ @source_version= ] 'source_version' ]
        , [ @source_type= ] 'source_type'  
    [ , [ @source_length= ] source_length ]
    [ , [ @source_precision= ] source_precision ]
    [ , [ @source_scale= ] source_scale ]
    [ , [ @source_nullable= ] source_nullable ]
        , [ @destination_dbms = ] 'destination_dbms' 
    [ , [ @destination_version = ] 'destination_version' ]
    [ , [ @destination_type = ] 'destination_type' OUTPUT ]
    [ , [ @destination_length= ] destination_length OUTPUT ]
    [ , [ @destination_precision= ] destination_precision OUTPUT ]
    [ , [ @destination_scale= ] destination_scale OUTPUT ]
    [ , [ @destination_nullable= ] source_nullable OUTPUT ]
    [ , [ @dataloss= ] dataloss OUTPUT ]

Arguments

  • [ @source_dbms= ] 'source_dbms'
    Is the name of the DBMS from which the data types are mapped. source_dbms is sysname, and can be one of the following values:

    Value

    Description

    MSSQLSERVER

    The source is a SQL Server database.

    ORACLE

    The source is an Oracle database.

    You must specify this parameter.

  • [ @source_version= ] 'source_version'
    Is the version number of the source DBMS. source_version is varchar(10), with a default value of NULL.

  • [ @source_type= ] 'source_type'
    Is the data type in the source DBMS. source_type is sysname, with no default.

  • [ @source_length= ] source_length
    Is the length of the data type in the source DBMS. source_length is bigint, with a default value of NULL.

  • [ @source_precision= ] source_precision
    Is the precision of the data type in the source DBMS. source_precision is bigint, with a default value of NULL.

  • [ @source_scale= ] source_scale
    Is the scale of the data type in the source DBMS. source_scale is int, with a default value of NULL.

  • [ @source_nullable= ] source_nullable
    Is if the data type in the source DBMS supports a value of NULL. source_nullable is bit, with a default value of 1, which means that NULL values are supported.

  • [ @destination_dbms = ] 'destination_dbms'
    Is the name of the destination DBMS. destination_dbms is sysname, and can be one of the following values:

    Value

    Description

    MSSQLSERVER

    The destination is a SQL Server database.

    ORACLE

    The destination is an Oracle database.

    DB2

    The destination is an IBM DB2 database.

    SYBASE

    The destination is a Sybase database.

    You must specify this parameter.

  • [ @destination_version= ] 'destination_version'
    Is the product version of the destination DBMS. destination_version is varchar(10), with a default value of NULL.

  • [ @destination_type= ] 'destination_type' OUTPUT
    Is the data type listed in the destination DBMS. destination_type is sysname, with a default value of NULL.

  • [ @destination_length= ] destination_length OUTPUT
    Is the length of the data type in the destination DBMS. destination_length is bigint, with a default value of NULL.

  • [ @destination_precision= ] destination_precision OUTPUT
    Is the precision of the data type in the destination DBMS. destination_precision is bigint, with a default value of NULL.

  • [ @destination_scale= ] destination_scaleOUTPUT
    Is the scale of the data type in the destination DBMS. destination_scale is int, with a default value of NULL.

  • [ @destination_nullable= ] destination_nullableOUTPUT
    Is if the data type in the destination DBMS supports a value of NULL. destination_nullable is bit, with a default value of NULL. 1 means that NULL values are supported.

  • [ @dataloss= ] datalossOUTPUT
    Is if the mapping has the potential for data loss. dataloss is bit, with a default value of NULL. 1 means that there is a potential for data loss.

Return Code Values

0 (success) or 1 (failure)

Remarks

sp_getdefaultdatatypemapping is used in all types of replication between SQL Server and a non-SQL Server DBMS.

sp_getdefaultdatatypemapping returns the default destination data type that is the closest match to the specified source data type.

Permissions

Only members of the sysadmin fixed server role can execute sp_getdefaultdatatypemapping.