ABAP Select data from SAP table IST_TELN_MV into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP IST_TELN_MV table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to IST_TELN_MV. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the IST_TELN_MV table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_IST_TELN_MV TYPE STANDARD TABLE OF IST_TELN_MV,
      WA_IST_TELN_MV TYPE IST_TELN_MV,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <IST_TELN_MV> TYPE IST_TELN_MV.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_IST_TELN_MV.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM IST_TELN_MV
  INTO TABLE IT_IST_TELN_MV.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IST_TELN_MV
*  INTO TABLE @DATA(IT_IST_TELN_MV2).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_IST_TELN_MV INDEX 1 INTO DATA(WA_IST_TELN_MV2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_IST_TELN_MV ASSIGNING <IST_TELN_MV>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IST_TELN_MV>-CLIENT = 1.
<IST_TELN_MV>-FRG_GUID = 1.
<IST_TELN_MV>-VALID_FROM = 1.
<IST_TELN_MV>-VALID_TO = 1.
<IST_TELN_MV>-UPNAME = 1.

ENDLOOP.

LOOP AT IT_IST_TELN_MV INTO WA_IST_TELN_MV.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IST_TELN_MV-HISTEX, sy-vline,
  WA_IST_TELN_MV-LOGSYS, sy-vline,
  WA_IST_TELN_MV-ACODE, sy-vline,
  WA_IST_TELN_MV-ADDKEY, sy-vline,
  WA_IST_TELN_MV-BGUID, sy-vline,
  WA_IST_TELN_MV-CANCELED, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IST_TELN_MV you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_IST_TELN_MV TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_IST_TELN_MV INTO WA_IST_TELN_MV.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.

*Conversion exit TSTPS, internal->external for field VALID_FROM
CALL FUNCTION 'CONVERSION_EXIT_TSTPS_OUTPUT'
  EXPORTING
    input =                      WA_IST_TELN_MV-VALID_FROM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IST_TELN_MV-VALID_FROM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTPS, internal->external for field VALID_TO
CALL FUNCTION 'CONVERSION_EXIT_TSTPS_OUTPUT'
  EXPORTING
    input =                      WA_IST_TELN_MV-VALID_TO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IST_TELN_MV-VALID_TO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LOGSYS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IST_TELN_MV-LOGSYS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IST_TELN_MV-LOGSYS.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_IST_TELN_MV_STR, 
CLIENT TYPE STRING,
FRG_GUID TYPE STRING,
VALID_FROM TYPE STRING,
VALID_TO TYPE STRING,
UPNAME TYPE STRING,
HISTEX TYPE STRING,
LOGSYS TYPE STRING,
ACODE TYPE STRING,
ADDKEY TYPE STRING,
BGUID TYPE STRING,
CANCELED TYPE STRING,
CANCELR TYPE STRING,
CCODE TYPE STRING,
GROUP_ID TYPE STRING,
KISDN TYPE STRING,
KLEAD TYPE STRING,
KPNUM TYPE STRING,
LOCKED TYPE STRING,
LOCK_R TYPE STRING,
LOCK_T TYPE STRING,
NOLOCK TYPE STRING,
NOLOCK_R TYPE STRING,
OGUID TYPE STRING,
PGUID TYPE STRING,
TCOMP TYPE STRING,
TELNUM TYPE STRING,
KGSM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IST_TELN_MV_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_IST_TELN_MV_STR-CLIENT sy-vline 
WA_IST_TELN_MV_STR-FRG_GUID sy-vline 
WA_IST_TELN_MV_STR-VALID_FROM sy-vline 
WA_IST_TELN_MV_STR-VALID_TO sy-vline 
WA_IST_TELN_MV_STR-UPNAME sy-vline 
WA_IST_TELN_MV_STR-HISTEX sy-vline 
WA_IST_TELN_MV_STR-LOGSYS sy-vline 
WA_IST_TELN_MV_STR-ACODE sy-vline 
WA_IST_TELN_MV_STR-ADDKEY sy-vline 
WA_IST_TELN_MV_STR-BGUID sy-vline 
WA_IST_TELN_MV_STR-CANCELED sy-vline 
WA_IST_TELN_MV_STR-CANCELR sy-vline 
WA_IST_TELN_MV_STR-CCODE sy-vline 
WA_IST_TELN_MV_STR-GROUP_ID sy-vline 
WA_IST_TELN_MV_STR-KISDN sy-vline 
WA_IST_TELN_MV_STR-KLEAD sy-vline 
WA_IST_TELN_MV_STR-KPNUM sy-vline 
WA_IST_TELN_MV_STR-LOCKED sy-vline 
WA_IST_TELN_MV_STR-LOCK_R sy-vline 
WA_IST_TELN_MV_STR-LOCK_T sy-vline 
WA_IST_TELN_MV_STR-NOLOCK sy-vline 
WA_IST_TELN_MV_STR-NOLOCK_R sy-vline 
WA_IST_TELN_MV_STR-OGUID sy-vline 
WA_IST_TELN_MV_STR-PGUID sy-vline 
WA_IST_TELN_MV_STR-TCOMP sy-vline 
WA_IST_TELN_MV_STR-TELNUM sy-vline 
WA_IST_TELN_MV_STR-KGSM sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.