Parse (Database Engine)
Parse converts the canonical string representation of a hierarchyid to a hierarchyid value. Parse is called implicitly when a conversion from a string type to hierarchyid occurs. Acts as the opposite of ToString. Parse() is a static method.
Syntax
-- Transact-SQL syntax
hierarchyid::Parse (input)
-- This is functionally equivalent to the following syntax
-- which implicitly calls Parse():
CAST (input AS hierarchyid )
-- CLR syntax
static SqlHierarchyId Parse (SqlString input)
Arguments
input
Transact-SQL: The character data type value that is being converted.CLR: The String value that is being evaluated.
Return Types
**SQL Server return type:**hierarchyid
**CLR return type:**SqlHierarchyId
Remarks
If Parse receives a value that is not a valid string representation of a hierarchyid, an exception is raised. For example, if char data types contain trailing spaces, an exception is raised.
Examples
A. Converting Transact-SQL values without a table
The following code example uses ToString to convert a hierarchyid value to a string, and Parse to convert a string value to a hierarchyid.
DECLARE @StringValue AS nvarchar(4000), @hierarchyidValue AS hierarchyid
SET @StringValue = '/1/1/3/'
SET @hierarchyidValue = 0x5ADE
SELECT hierarchyid::Parse(@StringValue) AS hierarchyidRepresentation,
@hierarchyidValue.ToString() AS StringRepresentation ;
GO
Here is the result set.
hierarchyidRepresentation StringRepresentation
------------------------- -----------------------
0x5ADE /1/1/3/
B. CLR example
The following code snippet calls the Parse() method:
string input = “/1/2/”;
SqlHierarchyId.Parse(input);