ABAP Select data from SAP table T74HB into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP T74HB 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 T74HB. 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 T74HB 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_T74HB TYPE STANDARD TABLE OF T74HB,
      WA_T74HB TYPE T74HB,
      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: <T74HB> TYPE T74HB.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_T74HB.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM T74HB
  INTO TABLE IT_T74HB.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM T74HB
*  INTO TABLE @DATA(IT_T74HB2).
*--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_T74HB INDEX 1 INTO DATA(WA_T74HB2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_T74HB ASSIGNING <T74HB>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<T74HB>-MANDT = 1.
<T74HB>-BAREA = 1.
<T74HB>-EVENT = 1.
<T74HB>-EVTGR = 1.
<T74HB>-PLTYP = 1.

ENDLOOP.

LOOP AT IT_T74HB INTO WA_T74HB.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_T74HB-CHG_BPLAN, sy-vline,
  WA_T74HB-ADD_BPLAN, sy-vline,
  WA_T74HB-DEL_BPLAN, sy-vline,
  WA_T74HB-CHG_BOPTI, sy-vline,
  WA_T74HB-CHG_DEPCV, sy-vline,
  WA_T74HB-CHG_BCOVR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_T74HB 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_T74HB 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_T74HB INTO WA_T74HB.


*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_T74HB_STR, 
MANDT TYPE STRING,
BAREA TYPE STRING,
EVENT TYPE STRING,
EVTGR TYPE STRING,
PLTYP TYPE STRING,
CHG_BPLAN TYPE STRING,
ADD_BPLAN TYPE STRING,
DEL_BPLAN TYPE STRING,
CHG_BOPTI TYPE STRING,
CHG_DEPCV TYPE STRING,
CHG_BCOVR TYPE STRING,
CHG_LEVL1 TYPE STRING,
INC_ADDNO TYPE STRING,
DEC_ADDNO TYPE STRING,
INC_PRECO TYPE STRING,
DEC_PRECO TYPE STRING,
INC_PSTCO TYPE STRING,
DEC_PSTCO TYPE STRING,
CHG_PSTTX TYPE STRING,
INC_CAMNT TYPE STRING,
DEC_CAMNT TYPE STRING,
CHG_DEPDT TYPE STRING,
CHG_BENEF TYPE STRING,
CHG_INVES TYPE STRING,
INC_BPRCO TYPE STRING,
DEC_BPRCO TYPE STRING,
INC_BPTCO TYPE STRING,
DEC_BPTCO TYPE STRING,
CHG_BPTTX TYPE STRING,
CHG_PRETX TYPE STRING,END OF T_EKKO_STR.
DATA: WA_T74HB_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_T74HB_STR-MANDT sy-vline 
WA_T74HB_STR-BAREA sy-vline 
WA_T74HB_STR-EVENT sy-vline 
WA_T74HB_STR-EVTGR sy-vline 
WA_T74HB_STR-PLTYP sy-vline 
WA_T74HB_STR-CHG_BPLAN sy-vline 
WA_T74HB_STR-ADD_BPLAN sy-vline 
WA_T74HB_STR-DEL_BPLAN sy-vline 
WA_T74HB_STR-CHG_BOPTI sy-vline 
WA_T74HB_STR-CHG_DEPCV sy-vline 
WA_T74HB_STR-CHG_BCOVR sy-vline 
WA_T74HB_STR-CHG_LEVL1 sy-vline 
WA_T74HB_STR-INC_ADDNO sy-vline 
WA_T74HB_STR-DEC_ADDNO sy-vline 
WA_T74HB_STR-INC_PRECO sy-vline 
WA_T74HB_STR-DEC_PRECO sy-vline 
WA_T74HB_STR-INC_PSTCO sy-vline 
WA_T74HB_STR-DEC_PSTCO sy-vline 
WA_T74HB_STR-CHG_PSTTX sy-vline 
WA_T74HB_STR-INC_CAMNT sy-vline 
WA_T74HB_STR-DEC_CAMNT sy-vline 
WA_T74HB_STR-CHG_DEPDT sy-vline 
WA_T74HB_STR-CHG_BENEF sy-vline 
WA_T74HB_STR-CHG_INVES sy-vline 
WA_T74HB_STR-INC_BPRCO sy-vline 
WA_T74HB_STR-DEC_BPRCO sy-vline 
WA_T74HB_STR-INC_BPTCO sy-vline 
WA_T74HB_STR-DEC_BPTCO sy-vline 
WA_T74HB_STR-CHG_BPTTX sy-vline 
WA_T74HB_STR-CHG_PRETX sy-vline      INTO ld_text SEPARATED BY SPACE.

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