How to get stored procedure parameters details?

select     'Parameter_name' = name,     'Type'   = type_name(user_type_id),     'Length'   = max_length,     'Prec'   = case when type_name(system_type_id) = 'uniqueidentifier'               then precision                else OdbcPrec(system_type_id, max_length, precision) end,     'Scale'   = OdbcScale(system_type_id, scale),     'Param_order'  = parameter_id,     'Collation'   = convert(sysname,                    case when system_type_id in (35, 99, 167, 175, 231, 239)                     then ServerProperty('collation') end)    from sys.parameters where object_id = object_id('MySchema.MyProcedure')

select * from sys.parameters inner join sys.procedures on parameters.object_id = procedures.object_id inner join sys.types on parameters.system_type_id = types.system_type_id AND parameters.user_type_id = types.user_type_idwhere procedures.name = 'sp_name'

For a supplied procedure name, the following query lists all of its parameters and their order along with their type and the type's length (for use with VARCHAR, etc.)

Replace procedure_name with the name of your procedure.

DECLARE @ProcedureName VARCHAR(MAX) = 'procedure_name'SELECT    pa.parameter_id AS [order]    , pa.name AS [name]    , UPPER(t.name) AS [type]    , t.max_length AS [length] FROM sys.parameters AS pa INNER JOIN sys.procedures AS p on pa.object_id = p.object_id INNER JOIN sys.types AS t on pa.system_type_id = t.system_type_id AND pa.user_type_id = t.user_type_idWHERE p.name = @ProcedureName