ABAP Select data from SAP table EJVL_CORR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EJVL_CORR
*  INTO TABLE @DATA(IT_EJVL_CORR2).
*--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_EJVL_CORR INDEX 1 INTO DATA(WA_EJVL_CORR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<EJVL_CORR>-JVLBASIS = 1.
<EJVL_CORR>-JVLBETR = 1.
<EJVL_CORR>-JVLBETRTAX = 1.
<EJVL_CORR>-JVLBONUS = 1.
<EJVL_CORR>-JVLBONUSTAX = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EJVL_CORR-MWSKZ, sy-vline,
  WA_EJVL_CORR-FAEDN, sy-vline,
  WA_EJVL_CORR-ZINSZ, sy-vline,
  WA_EJVL_CORR-JVLSTATUS, sy-vline,
  WA_EJVL_CORR-JVLTE, sy-vline,
  WA_EJVL_CORR-AKTIV, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_EJVL_CORR 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_EJVL_CORR 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_EJVL_CORR INTO WA_EJVL_CORR.


*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 ZINSZ
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EJVL_CORR-ZINSZ
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EJVL_CORR-ZINSZ.
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_EJVL_CORR_STR, 
JVLBASIS TYPE STRING,
JVLBETR TYPE STRING,
JVLBETRTAX TYPE STRING,
JVLBONUS TYPE STRING,
JVLBONUSTAX TYPE STRING,
MWSKZ TYPE STRING,
FAEDN TYPE STRING,
ZINSZ TYPE STRING,
JVLSTATUS TYPE STRING,
JVLTE TYPE STRING,
AKTIV TYPE STRING,
FDATE TYPE STRING,
TDATE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EJVL_CORR_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_EJVL_CORR_STR-JVLBASIS sy-vline 
WA_EJVL_CORR_STR-JVLBETR sy-vline 
WA_EJVL_CORR_STR-JVLBETRTAX sy-vline 
WA_EJVL_CORR_STR-JVLBONUS sy-vline 
WA_EJVL_CORR_STR-JVLBONUSTAX sy-vline 
WA_EJVL_CORR_STR-MWSKZ sy-vline 
WA_EJVL_CORR_STR-FAEDN sy-vline 
WA_EJVL_CORR_STR-ZINSZ sy-vline 
WA_EJVL_CORR_STR-JVLSTATUS sy-vline 
WA_EJVL_CORR_STR-JVLTE sy-vline 
WA_EJVL_CORR_STR-AKTIV sy-vline 
WA_EJVL_CORR_STR-FDATE sy-vline 
WA_EJVL_CORR_STR-TDATE sy-vline      INTO ld_text SEPARATED BY SPACE.

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