DROP FUNCTION IF EXISTS [dbo].[fnGetKapcsolodoTantargyak]
GO

CREATE FUNCTION [dbo].[fnGetKapcsolodoTantargyak] (
   @pIntezmenyId    INT 
  ,@pTanevId      INT
  ,@pTantargyId    INT
) 
RETURNS @return TABLE (
   ID                      INT
  ,C_FOTARGYID                INT
  ,C_NEV                    NVARCHAR(255)
  ,C_TARGYKATEGORIA               INT
  ,C_INTEZMENYID                 INT
  ,C_TANEVID                   INT
    ,C_ISTANULMANYIATLAGBANEMSZAMIT CHAR(1)
)
BEGIN   
  IF @pTantargyId IS NULL
  BEGIN   
    INSERT INTO @return 
    SELECT ID, C_FOTARGYID, C_NEV, C_TARGYKATEGORIA, C_INTEZMENYID, C_TANEVID, C_ISTANULMANYIATLAGBANEMSZAMIT FROM T_TANTARGY_OSSZES WHERE C_INTEZMENYID = @pIntezmenyId AND C_TANEVID = @pTanevId AND TOROLT = 'F'
  END
  ELSE   
  BEGIN   
    INSERT INTO @return 
    SELECT ID, C_FOTARGYID, C_NEV, C_TARGYKATEGORIA, C_INTEZMENYID, C_TANEVID, C_ISTANULMANYIATLAGBANEMSZAMIT FROM T_TANTARGY_OSSZES WHERE ID = @pTantargyId AND C_INTEZMENYID = @pIntezmenyId AND C_TANEVID = @pTanevId AND TOROLT = 'F'
    UNION
    SELECT ID, C_FOTARGYID, C_NEV, C_TARGYKATEGORIA, C_INTEZMENYID, C_TANEVID, C_ISTANULMANYIATLAGBANEMSZAMIT FROM T_TANTARGY_OSSZES WHERE C_FOTARGYID = @pTantargyId AND C_INTEZMENYID = @pIntezmenyId AND C_TANEVID = @pTanevId AND TOROLT = 'F'
    UNION
    SELECT ID, C_FOTARGYID, C_NEV, C_TARGYKATEGORIA, C_INTEZMENYID, C_TANEVID, C_ISTANULMANYIATLAGBANEMSZAMIT FROM T_TANTARGY_OSSZES WHERE C_FOTARGYID = (SELECT C_FOTARGYID FROM T_TANTARGY_OSSZES WHERE ID = @pTantargyId AND C_INTEZMENYID = @pIntezmenyId AND C_TANEVID = @pTanevId AND TOROLT = 'F') AND C_INTEZMENYID = @pIntezmenyId AND C_TANEVID = @pTanevId AND TOROLT = 'F'
    UNION
    SELECT ID, C_FOTARGYID, C_NEV, C_TARGYKATEGORIA, C_INTEZMENYID, C_TANEVID, C_ISTANULMANYIATLAGBANEMSZAMIT FROM T_TANTARGY_OSSZES WHERE ID = (SELECT C_FOTARGYID FROM T_TANTARGY_OSSZES WHERE ID = @pTantargyId AND C_INTEZMENYID = @pIntezmenyId AND C_TANEVID = @pTanevId AND TOROLT = 'F') AND C_INTEZMENYID = @pIntezmenyId AND C_TANEVID = @pTanevId AND TOROLT = 'F'
    ORDER BY C_FOTARGYID ASC, C_NEV ASC
  END
  RETURN  
END

GO