RTTS example

[Former Member]

Hi Experts,

Am practing one RTTS example but am getting dump for the below example when we execute.

when i use describe_by_data( value ) am getiing output

when i use describe_by_name( value ) am getting runtime error.

Please explain what is the excat diff between describe_by_data( ) and describe_by_name( ) methods ?

data: value type i.

data: obj_ref type REF TO cl_abap_typedescr.

START-OF-SELECTION.

*obj_ref  = cl_abap_typedescr=>describe_by_data( value  ).
obj_ref = cl_abap_typedescr=>describe_by_name( value ).

  WRITE: / 'Typename:', obj_ref->absolute_name.
  WRITE: / 'Kind    :', obj_ref->type_kind.
  WRITE: / 'Length  :', obj_ref->length.
  WRITE: / 'Decimals:', obj_ref->decimals.

[RaymondGiuseppi]

Just read documentation of the methods with its samples.

descr_ref = cl_abap_typedescr=>describe_by_name( 'MY_TYPE' ). " name of type/data
descr_ref = cl_abap_typedescr=>describe_by_data( my_data ). " type/data

Regards,

Raymond

[Former Member]

Hi Raymond,

data: value type i.

obj_ref  = cl_abap_typedescr=>describe_by_data( value  ).

when we use above statement am getting correct output.(BELOW OUTPUT)

WRITE: / 'Typename:', obj_ref->absolute_name.   ---->\TYPE=I

  WRITE: / 'Kind    :', obj_ref->type_kind.            ------> I

  WRITE: / 'Length  :', obj_ref->length.                ------->4

  WRITE: / 'Decimals:', obj_ref->decimals.         -------->0

obj_ref  = cl_abap_typedescr=>describe_by_name ( value  ).

when i use above stmt am getting runtime dump.

obj_ref  = cl_abap_typedescr=>describe_by_name ( 'VALUE'  ).

when i use above stmt am not getting exact output.(BELOW OUTPUT).it is supposed to display interger type as per my guess

WRITE: / 'Typename:', obj_ref->absolute_name.   ---->\TYPE=C

  WRITE: / 'Kind    :', obj_ref->type_kind.            ------> C

  WRITE: / 'Length  :', obj_ref->length.                ------->32

  WRITE: / 'Decimals:', obj_ref->decimals.         -------->0

Please correct my code any one..i will reward

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Message was edited by: Suhas Saha

[Former Member]

Hi All,

data: value type i.

obj_ref  = cl_abap_typedescr=>describe_by_data( value  ).

when we use above statement am getting correct output.(BELOW OUTPUT)

WRITE: / 'Typename:', obj_ref->absolute_name.   ---->\TYPE=I

  WRITE: / 'Kind    :', obj_ref->type_kind.            ------> I

  WRITE: / 'Length  :', obj_ref->length.                ------->4

  WRITE: / 'Decimals:', obj_ref->decimals.         -------->0

obj_ref  = cl_abap_typedescr=>describe_by_name ( value  ).

when i use above stmt am getting runtime dump.

obj_ref  = cl_abap_typedescr=>describe_by_name ( 'VALUE'  ).

when i use above stmt am not getting exact output.(BELOW OUTPUT).it is supposed to display interger type as per my guess

WRITE: / 'Typename:', obj_ref->absolute_name.   ---->\TYPE=C

  WRITE: / 'Kind    :', obj_ref->type_kind.            ------> C

  WRITE: / 'Length  :', obj_ref->length.                ------->32

  WRITE: / 'Decimals:', obj_ref->decimals.         -------->0

I dont know the reason why it is displaying like that?

[Former Member]

Run below statement and usage would be clear.

 obj_ref  = cl_abap_typedescr=>describe_by_name( 'SFLIGHT'  ).

You have to pass a type name, either from dictionary or one defined in program using TYPES statement.

[former_member192854]

Hi Srinad,

this describe_by_name will describe types which are in the datadictionary (SE11). The data element 'VALUE'. So in your last example the data element VALUE will be described, instead of the instance variable 'value'.

Best,

Sander