What Is Oledb In Sql Server

Ole db is microsoft s strategic low level application program interface api for access to different data sources.

What is oledb in sql server. Linked server queries remote procedure calls bulk insert operations full text search and queries to external data sources for example excel all contribute to oledb wait type. Ole db driver for sql server delivers the sql ole db driver in one dynamic link library dll. Both the sql server native client 10 0 ole db provider sqlncli10 and sql server ole db driver sqloledb are ole db providers shipped by microsoft. Microsoft s release of sql server 2012 internal code.

Oledb is an api used by sql server when retrieving data from a remote server or datasource. Since sql server is 1 made by microsoft and 2 the microsoft database platform both odbc and ole db are a natural fit for it. Ole db includes not only the structured query language sql capabilities of the microsoft sponsored standard data interface open database connectivity odbc but. Denali is the last to include an ole db provider for sql server but support will continue for 7 years.

The ole db provider for sql server in mdac 2 7 mdac 2 8 and windows dac 6 0 has a dynamic property called allow native variants which as the name implies allows developers to access the sql variant in its native form as opposed to a dbtype variant. Sqloledb has been deprecated for some time but is provided for backwards compatibility in modern windows operating systems as part of windows data access components. This interface is called msdasql microsoft ole db provider for odbc. Oledb is a common wait type in sql server indicating a significant amout of wait time accumulation.

Note that there is a known issue since sql server 2000 with rolled back operations through linked servers where the linked server is not sql server. Since all other database platforms had odbc interfaces microsoft obviously had to provide one for. The ole db driver for sql server is a stand alone data access application programming interface api used for ole db that was introduced in sql server 2005 9 x. Connection strings using sqloledb for connections to sql server sql server 2000 and sql server 7 0.

This wait type indicates that an spid has made a function call to an ole db provider and is waiting for the function to return the required data. Sql server data access technologies.