mindbcompatibilitylevel-geography-data-type.md

title	MinDbCompatibilityLevel (geography Data Type)
description	MinDbCompatibilityLevel (geography Data Type)
author	MladjoA
ms.author	mlandzic
ms.date	03/14/2017
ms.service	sql
ms.subservice	t-sql
ms.topic	reference
ms.custom	ignite-2025
f1_keywords	MinDbCompatibilityLevel MinDbCompatibilityLevel_TSQL
helpviewer_keywords	MinDbCompatibilityLevel method (geography)
dev_langs	TSQL
monikerRange	=azuresqldb-current || >=sql-server-2016 || >=sql-server-linux-2017 || =azuresqldb-mi-current || =fabric-sqldb

MinDbCompatibilityLevel (geography Data Type)

[!INCLUDE SQL Server Azure SQL Database Azure SQL Managed Instance FabricSQLDB]

Returns the minimum database compatibility that recognizes the geography data type.

Syntax

  
. MinDbCompatibilityLevel ( )  

Return Types

[!INCLUDEssNoVersion] return type: int

CLR return type: int

Remarks

Use MinDbCompatibilityLevel() to test a spatial object for compatibility before changing the compatibility level on a database. An invalid geography type returns 110.

Examples

A. Testing CircularString type for compatibility with compatibility level 110

The following example tests a CircularString instance for compatibility with an earlier version of [!INCLUDEssNoVersion]:

DECLARE @g geometry = 'CIRCULARSTRING(-120.533 46.566, -118.283 46.1, -122.3 47.45)';  
IF @g.MinDbCompatibilityLevel() <= 110  
BEGIN  
    SELECT @g.ToString();  
END  

B. Testing LineString type for compatibility with compatibility level 100

The following example tests a LineString instance for compatibility with [!INCLUDEsql2008-md]:

DECLARE @g geometry = 'LINESTRING(-120.533 46.566, -118.283 46.1, -122.3 47.45)';  
IF @g.MinDbCompatibilityLevel() <= 100  
BEGIN  
    SELECT @g.ToString();  
END  

C. Testing the value of a Geography instance for compatibility

The following example shows the compatibility levels for two geography instances. One is smaller than a hemisphere and the other is larger than a hemisphere:

DECLARE @g geography = geography::Parse('POLYGON((0 -10, 120 -10, 240 -10, 0 -10))');  
DECLARE @h geography = geography::Parse('POLYGON((0 10, 120 10, 240 10, 0 10))');  
IF (@g.EnvelopeAngle() >= 90)  
BEGIN  
SELECT @g.MinDbCompatibilityLevel();  
END     
IF (@h.EnvelopeAngle() < 90)  
BEGIN  
SELECT @h.MinDbCompatibilityLevel();  
END  

The first SELECT statement returns 110 and the second SELECT statement returns 100.

See Also

ALTER DATABASE Compatibility Level (Transact-SQL)
SQL Server Database Engine Backward Compatibility