ABAP Select data from SAP table JITBW_H into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM JITBW_H
*  INTO TABLE @DATA(IT_JITBW_H2).
*--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_JITBW_H INDEX 1 INTO DATA(WA_JITBW_H2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<JITBW_H>-REQUEST = 1.
<JITBW_H>-DATAPAKID = 1.
<JITBW_H>-RECORD = 1.
<JITBW_H>-JINUM = 1.
<JITBW_H>-POSID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_JITBW_H-ABTYP, sy-vline,
  WA_JITBW_H-KUNNR, sy-vline,
  WA_JITBW_H-ABLAD, sy-vline,
  WA_JITBW_H-FLDPO, sy-vline,
  WA_JITBW_H-LIUMF, sy-vline,
  WA_JITBW_H-WERKS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_JITBW_H 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_JITBW_H 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_JITBW_H INTO WA_JITBW_H.


*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.
ENDFORM. 

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

TYPES: BEGIN OF T_JITBW_H_STR, 
REQUEST TYPE STRING,
DATAPAKID TYPE STRING,
RECORD TYPE STRING,
JINUM TYPE STRING,
POSID TYPE STRING,
ABTYP TYPE STRING,
KUNNR TYPE STRING,
ABLAD TYPE STRING,
FLDPO TYPE STRING,
LIUMF TYPE STRING,
WERKS TYPE STRING,
EDATUM TYPE STRING,
EZEIT TYPE STRING,
EXTST TYPE STRING,
INTST TYPE STRING,
KNREF TYPE STRING,END OF T_EKKO_STR.
DATA: WA_JITBW_H_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_JITBW_H_STR-REQUEST sy-vline 
WA_JITBW_H_STR-DATAPAKID sy-vline 
WA_JITBW_H_STR-RECORD sy-vline 
WA_JITBW_H_STR-JINUM sy-vline 
WA_JITBW_H_STR-POSID sy-vline 
WA_JITBW_H_STR-ABTYP sy-vline 
WA_JITBW_H_STR-KUNNR sy-vline 
WA_JITBW_H_STR-ABLAD sy-vline 
WA_JITBW_H_STR-FLDPO sy-vline 
WA_JITBW_H_STR-LIUMF sy-vline 
WA_JITBW_H_STR-WERKS sy-vline 
WA_JITBW_H_STR-EDATUM sy-vline 
WA_JITBW_H_STR-EZEIT sy-vline 
WA_JITBW_H_STR-EXTST sy-vline 
WA_JITBW_H_STR-INTST sy-vline 
WA_JITBW_H_STR-KNREF sy-vline      INTO ld_text SEPARATED BY SPACE.

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