ABAP Select data from SAP table ISMAM_TXW_JJTVB into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ISMAM_TXW_JJTVB
*  INTO TABLE @DATA(IT_ISMAM_TXW_JJTVB2).
*--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_ISMAM_TXW_JJTVB INDEX 1 INTO DATA(WA_ISMAM_TXW_JJTVB2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ISMAM_TXW_JJTVB>-MANDT = 1.
<ISMAM_TXW_JJTVB>-VNR = 1.
<ISMAM_TXW_JJTVB>-BEDNR = 1.
<ISMAM_TXW_JJTVB>-GUELTIGAB = 1.
<ISMAM_TXW_JJTVB>-GUELTIGBIS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ISMAM_TXW_JJTVB-BEDART, sy-vline,
  WA_ISMAM_TXW_JJTVB-BEDGR, sy-vline,
  WA_ISMAM_TXW_JJTVB-XSTDBED, sy-vline,
  WA_ISMAM_TXW_JJTVB-PROSL, sy-vline,
  WA_ISMAM_TXW_JJTVB-XPROV, sy-vline,
  WA_ISMAM_TXW_JJTVB-XBONUS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ISMAM_TXW_JJTVB 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_ISMAM_TXW_JJTVB 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_ISMAM_TXW_JJTVB INTO WA_ISMAM_TXW_JJTVB.


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

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

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

*Conversion exit ALPHA, internal->external for field LAST_BESNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ISMAM_TXW_JJTVB-LAST_BESNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISMAM_TXW_JJTVB-LAST_BESNR.
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_ISMAM_TXW_JJTVB_STR, 
MANDT TYPE STRING,
VNR TYPE STRING,
BEDNR TYPE STRING,
GUELTIGAB TYPE STRING,
GUELTIGBIS TYPE STRING,
BEDART TYPE STRING,
BEDGR TYPE STRING,
XSTDBED TYPE STRING,
PROSL TYPE STRING,
XPROV TYPE STRING,
XBONUS TYPE STRING,
XBONUS2 TYPE STRING,
XSTEIG TYPE STRING,
XBERICHT TYPE STRING,
XVORAUS TYPE STRING,
JVERMART TYPE STRING,
XLOEVM TYPE STRING,
XLOEKZ TYPE STRING,
VOR_VNR TYPE STRING,
VOR_BEDNR TYPE STRING,
XNOGVZ TYPE STRING,
KURZTEXT TYPE STRING,
LANGTEXT TYPE STRING,
ERFUSER TYPE STRING,
ERFDATE TYPE STRING,
ERFTIME TYPE STRING,
AENUSER TYPE STRING,
AENDATE TYPE STRING,
AENTIME TYPE STRING,
LAST_BESNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ISMAM_TXW_JJTVB_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_ISMAM_TXW_JJTVB_STR-MANDT sy-vline 
WA_ISMAM_TXW_JJTVB_STR-VNR sy-vline 
WA_ISMAM_TXW_JJTVB_STR-BEDNR sy-vline 
WA_ISMAM_TXW_JJTVB_STR-GUELTIGAB sy-vline 
WA_ISMAM_TXW_JJTVB_STR-GUELTIGBIS sy-vline 
WA_ISMAM_TXW_JJTVB_STR-BEDART sy-vline 
WA_ISMAM_TXW_JJTVB_STR-BEDGR sy-vline 
WA_ISMAM_TXW_JJTVB_STR-XSTDBED sy-vline 
WA_ISMAM_TXW_JJTVB_STR-PROSL sy-vline 
WA_ISMAM_TXW_JJTVB_STR-XPROV sy-vline 
WA_ISMAM_TXW_JJTVB_STR-XBONUS sy-vline 
WA_ISMAM_TXW_JJTVB_STR-XBONUS2 sy-vline 
WA_ISMAM_TXW_JJTVB_STR-XSTEIG sy-vline 
WA_ISMAM_TXW_JJTVB_STR-XBERICHT sy-vline 
WA_ISMAM_TXW_JJTVB_STR-XVORAUS sy-vline 
WA_ISMAM_TXW_JJTVB_STR-JVERMART sy-vline 
WA_ISMAM_TXW_JJTVB_STR-XLOEVM sy-vline 
WA_ISMAM_TXW_JJTVB_STR-XLOEKZ sy-vline 
WA_ISMAM_TXW_JJTVB_STR-VOR_VNR sy-vline 
WA_ISMAM_TXW_JJTVB_STR-VOR_BEDNR sy-vline 
WA_ISMAM_TXW_JJTVB_STR-XNOGVZ sy-vline 
WA_ISMAM_TXW_JJTVB_STR-KURZTEXT sy-vline 
WA_ISMAM_TXW_JJTVB_STR-LANGTEXT sy-vline 
WA_ISMAM_TXW_JJTVB_STR-ERFUSER sy-vline 
WA_ISMAM_TXW_JJTVB_STR-ERFDATE sy-vline 
WA_ISMAM_TXW_JJTVB_STR-ERFTIME sy-vline 
WA_ISMAM_TXW_JJTVB_STR-AENUSER sy-vline 
WA_ISMAM_TXW_JJTVB_STR-AENDATE sy-vline 
WA_ISMAM_TXW_JJTVB_STR-AENTIME sy-vline 
WA_ISMAM_TXW_JJTVB_STR-LAST_BESNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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