ABAP Select data from SAP table RN1WPV014_SELSCREEN into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RN1WPV014_SELSCREEN 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 RN1WPV014_SELSCREEN. 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 RN1WPV014_SELSCREEN 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_RN1WPV014_SELSCREEN TYPE STANDARD TABLE OF RN1WPV014_SELSCREEN,
      WA_RN1WPV014_SELSCREEN TYPE RN1WPV014_SELSCREEN,
      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: <RN1WPV014_SELSCREEN> TYPE RN1WPV014_SELSCREEN.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RN1WPV014_SELSCREEN.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RN1WPV014_SELSCREEN
  INTO TABLE IT_RN1WPV014_SELSCREEN.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RN1WPV014_SELSCREEN
*  INTO TABLE @DATA(IT_RN1WPV014_SELSCREEN2).
*--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_RN1WPV014_SELSCREEN INDEX 1 INTO DATA(WA_RN1WPV014_SELSCREEN2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RN1WPV014_SELSCREEN ASSIGNING <RN1WPV014_SELSCREEN>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RN1WPV014_SELSCREEN>-PLANDATE = 1.
<RN1WPV014_SELSCREEN>-OPOE = 1.
<RN1WPV014_SELSCREEN>-ANFOE = 1.
<RN1WPV014_SELSCREEN>-ANPOE = 1.
<RN1WPV014_SELSCREEN>-SINTUG = 1.

ENDLOOP.

LOOP AT IT_RN1WPV014_SELSCREEN INTO WA_RN1WPV014_SELSCREEN.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RN1WPV014_SELSCREEN-SINTOG, sy-vline,
  WA_RN1WPV014_SELSCREEN-UEBRIG, sy-vline,
  WA_RN1WPV014_SELSCREEN-STATUS, sy-vline,
  WA_RN1WPV014_SELSCREEN-WP_REQ, sy-vline,
  WA_RN1WPV014_SELSCREEN-WP_REM, sy-vline,
  WA_RN1WPV014_SELSCREEN-WP_DAY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RN1WPV014_SELSCREEN 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_RN1WPV014_SELSCREEN 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_RN1WPV014_SELSCREEN INTO WA_RN1WPV014_SELSCREEN.


*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 ALPHA, internal->external for field OPOE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1WPV014_SELSCREEN-OPOE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1WPV014_SELSCREEN-OPOE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ANFOE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1WPV014_SELSCREEN-ANFOE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1WPV014_SELSCREEN-ANFOE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ANPOE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1WPV014_SELSCREEN-ANPOE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1WPV014_SELSCREEN-ANPOE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ETRGP
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1WPV014_SELSCREEN-ETRGP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1WPV014_SELSCREEN-ETRGP.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LEIST
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1WPV014_SELSCREEN-LEIST
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1WPV014_SELSCREEN-LEIST.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VMA
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1WPV014_SELSCREEN-VMA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1WPV014_SELSCREEN-VMA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PATNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1WPV014_SELSCREEN-PATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1WPV014_SELSCREEN-PATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PAPID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1WPV014_SELSCREEN-PAPID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1WPV014_SELSCREEN-PAPID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field FALNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1WPV014_SELSCREEN-FALNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1WPV014_SELSCREEN-FALNR.
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_RN1WPV014_SELSCREEN_STR, 
PLANDATE TYPE STRING,
OPOE TYPE STRING,
ANFOE TYPE STRING,
ANPOE TYPE STRING,
SINTUG TYPE STRING,
SINTOG TYPE STRING,
UEBRIG TYPE STRING,
STATUS TYPE STRING,
WP_REQ TYPE STRING,
WP_REM TYPE STRING,
WP_DAY TYPE STRING,
ETRBY TYPE STRING,
ETRGP TYPE STRING,
LEIST TYPE STRING,
VMA TYPE STRING,
PRIO TYPE STRING,
STAT TYPE STRING,
PATNR TYPE STRING,
PAPID TYPE STRING,
FALNR TYPE STRING,
NOSRV TYPE STRING,
DATE_MT TYPE STRING,
DATE_OT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RN1WPV014_SELSCREEN_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_RN1WPV014_SELSCREEN_STR-PLANDATE sy-vline 
WA_RN1WPV014_SELSCREEN_STR-OPOE sy-vline 
WA_RN1WPV014_SELSCREEN_STR-ANFOE sy-vline 
WA_RN1WPV014_SELSCREEN_STR-ANPOE sy-vline 
WA_RN1WPV014_SELSCREEN_STR-SINTUG sy-vline 
WA_RN1WPV014_SELSCREEN_STR-SINTOG sy-vline 
WA_RN1WPV014_SELSCREEN_STR-UEBRIG sy-vline 
WA_RN1WPV014_SELSCREEN_STR-STATUS sy-vline 
WA_RN1WPV014_SELSCREEN_STR-WP_REQ sy-vline 
WA_RN1WPV014_SELSCREEN_STR-WP_REM sy-vline 
WA_RN1WPV014_SELSCREEN_STR-WP_DAY sy-vline 
WA_RN1WPV014_SELSCREEN_STR-ETRBY sy-vline 
WA_RN1WPV014_SELSCREEN_STR-ETRGP sy-vline 
WA_RN1WPV014_SELSCREEN_STR-LEIST sy-vline 
WA_RN1WPV014_SELSCREEN_STR-VMA sy-vline 
WA_RN1WPV014_SELSCREEN_STR-PRIO sy-vline 
WA_RN1WPV014_SELSCREEN_STR-STAT sy-vline 
WA_RN1WPV014_SELSCREEN_STR-PATNR sy-vline 
WA_RN1WPV014_SELSCREEN_STR-PAPID sy-vline 
WA_RN1WPV014_SELSCREEN_STR-FALNR sy-vline 
WA_RN1WPV014_SELSCREEN_STR-NOSRV sy-vline 
WA_RN1WPV014_SELSCREEN_STR-DATE_MT sy-vline 
WA_RN1WPV014_SELSCREEN_STR-DATE_OT sy-vline      INTO ld_text SEPARATED BY SPACE.

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