ABAP Select data from SAP table RJHA_OL_DISPO_PARAMS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RJHA_OL_DISPO_PARAMS
*  INTO TABLE @DATA(IT_RJHA_OL_DISPO_PARAMS2).
*--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_RJHA_OL_DISPO_PARAMS INDEX 1 INTO DATA(WA_RJHA_OL_DISPO_PARAMS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RJHA_OL_DISPO_PARAMS>-BELEGEINH_RNG = 1.
<RJHA_OL_DISPO_PARAMS>-INHALTSKOM_RNG = 1.
<RJHA_OL_DISPO_PARAMS>-PLAZ_ONL_RNG = 1.
<RJHA_OL_DISPO_PARAMS>-UNIT_OL = 1.
<RJHA_OL_DISPO_PARAMS>-TARGTYP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RJHA_OL_DISPO_PARAMS-OL_KZ_TRGT_VERT, sy-vline,
  WA_RJHA_OL_DISPO_PARAMS-KNTKTZHL_MAINT, sy-vline,
  WA_RJHA_OL_DISPO_PARAMS-DATE_LT_IST, sy-vline,
  WA_RJHA_OL_DISPO_PARAMS-KNTKTZHL_ZEITR, sy-vline,
  WA_RJHA_OL_DISPO_PARAMS-KNTKTZHL_ZEITRME, sy-vline,
  WA_RJHA_OL_DISPO_PARAMS-VKORG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RJHA_OL_DISPO_PARAMS 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_RJHA_OL_DISPO_PARAMS 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_RJHA_OL_DISPO_PARAMS INTO WA_RJHA_OL_DISPO_PARAMS.


*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 CUNIT, internal->external for field UNIT_OL
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RJHA_OL_DISPO_PARAMS-UNIT_OL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RJHA_OL_DISPO_PARAMS-UNIT_OL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field KNTKTZHL_ZEITRME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RJHA_OL_DISPO_PARAMS-KNTKTZHL_ZEITRME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RJHA_OL_DISPO_PARAMS-KNTKTZHL_ZEITRME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field S_KNTKTZHL_ZRME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RJHA_OL_DISPO_PARAMS-S_KNTKTZHL_ZRME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RJHA_OL_DISPO_PARAMS-S_KNTKTZHL_ZRME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field RASTER_ZEITRAUM
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RJHA_OL_DISPO_PARAMS-RASTER_ZEITRAUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RJHA_OL_DISPO_PARAMS-RASTER_ZEITRAUM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field RASTER_ZR_ISO
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RJHA_OL_DISPO_PARAMS-RASTER_ZR_ISO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RJHA_OL_DISPO_PARAMS-RASTER_ZR_ISO.
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_RJHA_OL_DISPO_PARAMS_STR, 
BELEGEINH_RNG TYPE STRING,
INHALTSKOM_RNG TYPE STRING,
PLAZ_ONL_RNG TYPE STRING,
UNIT_OL TYPE STRING,
TARGTYP TYPE STRING,
OL_KZ_TRGT_VERT TYPE STRING,
KNTKTZHL_MAINT TYPE STRING,
DATE_LT_IST TYPE STRING,
KNTKTZHL_ZEITR TYPE STRING,
KNTKTZHL_ZEITRME TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,
SPART TYPE STRING,
SEL_MIN_DATE TYPE STRING,
SEL_MAX_DATE TYPE STRING,
MIN_DATE TYPE STRING,
MAX_DATE TYPE STRING,
S_KNTKTZHL_ZR TYPE STRING,
S_KNTKTZHL_ZRME TYPE STRING,
RASTER_ZEITRAUM TYPE STRING,
RASTER_ZR_ISO TYPE STRING,
FIRSTDAY_OF_WEEK TYPE STRING,
RASTER_TARGET_SH TYPE STRING,
SHOW_ORDER TYPE STRING,
FULL_EPSILON TYPE STRING,
CONTEXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RJHA_OL_DISPO_PARAMS_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_RJHA_OL_DISPO_PARAMS_STR-BELEGEINH_RNG sy-vline 
WA_RJHA_OL_DISPO_PARAMS_STR-INHALTSKOM_RNG sy-vline 
WA_RJHA_OL_DISPO_PARAMS_STR-PLAZ_ONL_RNG sy-vline 
WA_RJHA_OL_DISPO_PARAMS_STR-UNIT_OL sy-vline 
WA_RJHA_OL_DISPO_PARAMS_STR-TARGTYP sy-vline 
WA_RJHA_OL_DISPO_PARAMS_STR-OL_KZ_TRGT_VERT sy-vline 
WA_RJHA_OL_DISPO_PARAMS_STR-KNTKTZHL_MAINT sy-vline 
WA_RJHA_OL_DISPO_PARAMS_STR-DATE_LT_IST sy-vline 
WA_RJHA_OL_DISPO_PARAMS_STR-KNTKTZHL_ZEITR sy-vline 
WA_RJHA_OL_DISPO_PARAMS_STR-KNTKTZHL_ZEITRME sy-vline 
WA_RJHA_OL_DISPO_PARAMS_STR-VKORG sy-vline 
WA_RJHA_OL_DISPO_PARAMS_STR-VTWEG sy-vline 
WA_RJHA_OL_DISPO_PARAMS_STR-SPART sy-vline 
WA_RJHA_OL_DISPO_PARAMS_STR-SEL_MIN_DATE sy-vline 
WA_RJHA_OL_DISPO_PARAMS_STR-SEL_MAX_DATE sy-vline 
WA_RJHA_OL_DISPO_PARAMS_STR-MIN_DATE sy-vline 
WA_RJHA_OL_DISPO_PARAMS_STR-MAX_DATE sy-vline 
WA_RJHA_OL_DISPO_PARAMS_STR-S_KNTKTZHL_ZR sy-vline 
WA_RJHA_OL_DISPO_PARAMS_STR-S_KNTKTZHL_ZRME sy-vline 
WA_RJHA_OL_DISPO_PARAMS_STR-RASTER_ZEITRAUM sy-vline 
WA_RJHA_OL_DISPO_PARAMS_STR-RASTER_ZR_ISO sy-vline 
WA_RJHA_OL_DISPO_PARAMS_STR-FIRSTDAY_OF_WEEK sy-vline 
WA_RJHA_OL_DISPO_PARAMS_STR-RASTER_TARGET_SH sy-vline 
WA_RJHA_OL_DISPO_PARAMS_STR-SHOW_ORDER sy-vline 
WA_RJHA_OL_DISPO_PARAMS_STR-FULL_EPSILON sy-vline 
WA_RJHA_OL_DISPO_PARAMS_STR-CONTEXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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