ABAP Select data from SAP table INST_PLN_HDR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM INST_PLN_HDR
*  INTO TABLE @DATA(IT_INST_PLN_HDR2).
*--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_INST_PLN_HDR INDEX 1 INTO DATA(WA_INST_PLN_HDR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<INST_PLN_HDR>-WAERS = 1.
<INST_PLN_HDR>-BLDAT = 1.
<INST_PLN_HDR>-BUDAT = 1.
<INST_PLN_HDR>-GPART = 1.
<INST_PLN_HDR>-VKONT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_INST_PLN_HDR-BLART, sy-vline,
  WA_INST_PLN_HDR-STTDT, sy-vline,
  WA_INST_PLN_HDR-RBETR, sy-vline,
  WA_INST_PLN_HDR-ANZRT, sy-vline,
  WA_INST_PLN_HDR-ABSRT, sy-vline,
  WA_INST_PLN_HDR-KENNZ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_INST_PLN_HDR 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_INST_PLN_HDR 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_INST_PLN_HDR INTO WA_INST_PLN_HDR.


*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 GPART
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_INST_PLN_HDR-GPART
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_INST_PLN_HDR-GPART.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field VTREF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_INST_PLN_HDR-VTREF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_INST_PLN_HDR-VTREF.
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_INST_PLN_HDR_STR, 
WAERS TYPE STRING,
BLDAT TYPE STRING,
BUDAT TYPE STRING,
GPART TYPE STRING,
VKONT TYPE STRING,
BLART TYPE STRING,
STTDT TYPE STRING,
RBETR TYPE STRING,
ANZRT TYPE STRING,
ABSRT TYPE STRING,
KENNZ TYPE STRING,
DIVAM TYPE STRING,
RPTYP TYPE STRING,
GEBUEHR TYPE STRING,
REMAINAMNT TYPE STRING,
GBBLART TYPE STRING,
FIKEY TYPE STRING,
STTIN TYPE STRING,
INKEY TYPE STRING,
IBLAR TYPE STRING,
FAEIN TYPE STRING,
GZVER TYPE STRING,
RPCAT TYPE STRING,
RPRDA TYPE STRING,
VTREF TYPE STRING,
SUBAP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_INST_PLN_HDR_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_INST_PLN_HDR_STR-WAERS sy-vline 
WA_INST_PLN_HDR_STR-BLDAT sy-vline 
WA_INST_PLN_HDR_STR-BUDAT sy-vline 
WA_INST_PLN_HDR_STR-GPART sy-vline 
WA_INST_PLN_HDR_STR-VKONT sy-vline 
WA_INST_PLN_HDR_STR-BLART sy-vline 
WA_INST_PLN_HDR_STR-STTDT sy-vline 
WA_INST_PLN_HDR_STR-RBETR sy-vline 
WA_INST_PLN_HDR_STR-ANZRT sy-vline 
WA_INST_PLN_HDR_STR-ABSRT sy-vline 
WA_INST_PLN_HDR_STR-KENNZ sy-vline 
WA_INST_PLN_HDR_STR-DIVAM sy-vline 
WA_INST_PLN_HDR_STR-RPTYP sy-vline 
WA_INST_PLN_HDR_STR-GEBUEHR sy-vline 
WA_INST_PLN_HDR_STR-REMAINAMNT sy-vline 
WA_INST_PLN_HDR_STR-GBBLART sy-vline 
WA_INST_PLN_HDR_STR-FIKEY sy-vline 
WA_INST_PLN_HDR_STR-STTIN sy-vline 
WA_INST_PLN_HDR_STR-INKEY sy-vline 
WA_INST_PLN_HDR_STR-IBLAR sy-vline 
WA_INST_PLN_HDR_STR-FAEIN sy-vline 
WA_INST_PLN_HDR_STR-GZVER sy-vline 
WA_INST_PLN_HDR_STR-RPCAT sy-vline 
WA_INST_PLN_HDR_STR-RPRDA sy-vline 
WA_INST_PLN_HDR_STR-VTREF sy-vline 
WA_INST_PLN_HDR_STR-SUBAP sy-vline      INTO ld_text SEPARATED BY SPACE.

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