ABAP Select data from SAP table ISMAM_TXW_JHAGA2 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_JHAGA2 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_JHAGA2. 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_JHAGA2 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_JHAGA2 TYPE STANDARD TABLE OF ISMAM_TXW_JHAGA2,
      WA_ISMAM_TXW_JHAGA2 TYPE ISMAM_TXW_JHAGA2,
      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_JHAGA2> TYPE ISMAM_TXW_JHAGA2.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_ISMAM_TXW_JHAGA2.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM ISMAM_TXW_JHAGA2
  INTO TABLE IT_ISMAM_TXW_JHAGA2.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ISMAM_TXW_JHAGA2
*  INTO TABLE @DATA(IT_ISMAM_TXW_JHAGA22).
*--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_JHAGA2 INDEX 1 INTO DATA(WA_ISMAM_TXW_JHAGA22).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_ISMAM_TXW_JHAGA2 ASSIGNING <ISMAM_TXW_JHAGA2>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ISMAM_TXW_JHAGA2>-MANDT = 1.
<ISMAM_TXW_JHAGA2>-AVM_NR = 1.
<ISMAM_TXW_JHAGA2>-POS_NR = 1.
<ISMAM_TXW_JHAGA2>-GRUPPABRNR = 1.
<ISMAM_TXW_JHAGA2>-CCAUA = 1.

ENDLOOP.

LOOP AT IT_ISMAM_TXW_JHAGA2 INTO WA_ISMAM_TXW_JHAGA2.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ISMAM_TXW_JHAGA2-CCOLD, sy-vline,
  WA_ISMAM_TXW_JHAGA2-CCVAL, sy-vline,
  WA_ISMAM_TXW_JHAGA2-CCPRE, sy-vline,
  WA_ISMAM_TXW_JHAGA2-CCACT, sy-vline,
  WA_ISMAM_TXW_JHAGA2-AUTWV, sy-vline,
  WA_ISMAM_TXW_JHAGA2-AUDAT_CC, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ISMAM_TXW_JHAGA2 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_JHAGA2 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_JHAGA2 INTO WA_ISMAM_TXW_JHAGA2.


*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 AVM_NR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ISMAM_TXW_JHAGA2-AVM_NR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISMAM_TXW_JHAGA2-AVM_NR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field CCACT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ISMAM_TXW_JHAGA2-CCACT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISMAM_TXW_JHAGA2-CCACT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MF_COA_LAGME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_ISMAM_TXW_JHAGA2-MF_COA_LAGME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISMAM_TXW_JHAGA2-MF_COA_LAGME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field INS_SERIES_RULE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ISMAM_TXW_JHAGA2-INS_SERIES_RULE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISMAM_TXW_JHAGA2-INS_SERIES_RULE.
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_JHAGA2_STR, 
MANDT TYPE STRING,
AVM_NR TYPE STRING,
POS_NR TYPE STRING,
GRUPPABRNR TYPE STRING,
CCAUA TYPE STRING,
CCOLD TYPE STRING,
CCVAL TYPE STRING,
CCPRE TYPE STRING,
CCACT TYPE STRING,
AUTWV TYPE STRING,
AUDAT_CC TYPE STRING,
AUTIM TYPE STRING,
CCALL TYPE STRING,
REACT TYPE STRING,
AUTWR TYPE STRING,
CCWAE TYPE STRING,
AUNUM TYPE STRING,
AUTRA TYPE STRING,
RCAVR TYPE STRING,
RCAVA TYPE STRING,
RCAVZ TYPE STRING,
RCRSP TYPE STRING,
CMPSA TYPE STRING,
CMPSB TYPE STRING,
CMPSC TYPE STRING,
CMPSE TYPE STRING,
CMPSF TYPE STRING,
CMPSG TYPE STRING,
CMPSH TYPE STRING,
CMPS0 TYPE STRING,
CMPS1 TYPE STRING,
CMPS2 TYPE STRING,
CMPSM TYPE STRING,
CMGST TYPE STRING,
MF_BER_MGLME TYPE STRING,
MF_COA_MGLME TYPE STRING,
MF_COA_LAGME TYPE STRING,
INS_SERIES_RULE TYPE STRING,
INS_SERIES TYPE STRING,
INS_SERIES_NO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ISMAM_TXW_JHAGA2_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_JHAGA2_STR-MANDT sy-vline 
WA_ISMAM_TXW_JHAGA2_STR-AVM_NR sy-vline 
WA_ISMAM_TXW_JHAGA2_STR-POS_NR sy-vline 
WA_ISMAM_TXW_JHAGA2_STR-GRUPPABRNR sy-vline 
WA_ISMAM_TXW_JHAGA2_STR-CCAUA sy-vline 
WA_ISMAM_TXW_JHAGA2_STR-CCOLD sy-vline 
WA_ISMAM_TXW_JHAGA2_STR-CCVAL sy-vline 
WA_ISMAM_TXW_JHAGA2_STR-CCPRE sy-vline 
WA_ISMAM_TXW_JHAGA2_STR-CCACT sy-vline 
WA_ISMAM_TXW_JHAGA2_STR-AUTWV sy-vline 
WA_ISMAM_TXW_JHAGA2_STR-AUDAT_CC sy-vline 
WA_ISMAM_TXW_JHAGA2_STR-AUTIM sy-vline 
WA_ISMAM_TXW_JHAGA2_STR-CCALL sy-vline 
WA_ISMAM_TXW_JHAGA2_STR-REACT sy-vline 
WA_ISMAM_TXW_JHAGA2_STR-AUTWR sy-vline 
WA_ISMAM_TXW_JHAGA2_STR-CCWAE sy-vline 
WA_ISMAM_TXW_JHAGA2_STR-AUNUM sy-vline 
WA_ISMAM_TXW_JHAGA2_STR-AUTRA sy-vline 
WA_ISMAM_TXW_JHAGA2_STR-RCAVR sy-vline 
WA_ISMAM_TXW_JHAGA2_STR-RCAVA sy-vline 
WA_ISMAM_TXW_JHAGA2_STR-RCAVZ sy-vline 
WA_ISMAM_TXW_JHAGA2_STR-RCRSP sy-vline 
WA_ISMAM_TXW_JHAGA2_STR-CMPSA sy-vline 
WA_ISMAM_TXW_JHAGA2_STR-CMPSB sy-vline 
WA_ISMAM_TXW_JHAGA2_STR-CMPSC sy-vline 
WA_ISMAM_TXW_JHAGA2_STR-CMPSE sy-vline 
WA_ISMAM_TXW_JHAGA2_STR-CMPSF sy-vline 
WA_ISMAM_TXW_JHAGA2_STR-CMPSG sy-vline 
WA_ISMAM_TXW_JHAGA2_STR-CMPSH sy-vline 
WA_ISMAM_TXW_JHAGA2_STR-CMPS0 sy-vline 
WA_ISMAM_TXW_JHAGA2_STR-CMPS1 sy-vline 
WA_ISMAM_TXW_JHAGA2_STR-CMPS2 sy-vline 
WA_ISMAM_TXW_JHAGA2_STR-CMPSM sy-vline 
WA_ISMAM_TXW_JHAGA2_STR-CMGST sy-vline 
WA_ISMAM_TXW_JHAGA2_STR-MF_BER_MGLME sy-vline 
WA_ISMAM_TXW_JHAGA2_STR-MF_COA_MGLME sy-vline 
WA_ISMAM_TXW_JHAGA2_STR-MF_COA_LAGME sy-vline 
WA_ISMAM_TXW_JHAGA2_STR-INS_SERIES_RULE sy-vline 
WA_ISMAM_TXW_JHAGA2_STR-INS_SERIES sy-vline 
WA_ISMAM_TXW_JHAGA2_STR-INS_SERIES_NO sy-vline      INTO ld_text SEPARATED BY SPACE.

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