ABAP Select data from SAP table FIAPQA_S_PREQHEADER into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FIAPQA_S_PREQHEADER
*  INTO TABLE @DATA(IT_FIAPQA_S_PREQHEADER2).
*--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_FIAPQA_S_PREQHEADER INDEX 1 INTO DATA(WA_FIAPQA_S_PREQHEADER2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FIAPQA_S_PREQHEADER>-BUKRS = 1.
<FIAPQA_S_PREQHEADER>-BELNR = 1.
<FIAPQA_S_PREQHEADER>-GJAHR = 1.
<FIAPQA_S_PREQHEADER>-BLART = 1.
<FIAPQA_S_PREQHEADER>-BLDAT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FIAPQA_S_PREQHEADER-BUDAT, sy-vline,
  WA_FIAPQA_S_PREQHEADER-RSTAT, sy-vline,
  WA_FIAPQA_S_PREQHEADER-WWERT, sy-vline,
  WA_FIAPQA_S_PREQHEADER-LIFNR, sy-vline,
  WA_FIAPQA_S_PREQHEADER-XBLNR, sy-vline,
  WA_FIAPQA_S_PREQHEADER-PREQWRBTR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FIAPQA_S_PREQHEADER 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_FIAPQA_S_PREQHEADER 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_FIAPQA_S_PREQHEADER INTO WA_FIAPQA_S_PREQHEADER.


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

*Conversion exit GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_FIAPQA_S_PREQHEADER-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FIAPQA_S_PREQHEADER-GJAHR.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit GJAHR, internal->external for field REBZJ
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_FIAPQA_S_PREQHEADER-REBZJ
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FIAPQA_S_PREQHEADER-REBZJ.
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_FIAPQA_S_PREQHEADER_STR, 
BUKRS TYPE STRING,
BELNR TYPE STRING,
GJAHR TYPE STRING,
BLART TYPE STRING,
BLDAT TYPE STRING,
BUDAT TYPE STRING,
RSTAT TYPE STRING,
WWERT TYPE STRING,
LIFNR TYPE STRING,
XBLNR TYPE STRING,
PREQWRBTR TYPE STRING,
WAERS TYPE STRING,
NAME1 TYPE STRING,
BUTXT TYPE STRING,
BUZEIV TYPE STRING,
ZFBDT TYPE STRING,
BKTXT TYPE STRING,
XBLNR1 TYPE STRING,
SGTXT TYPE STRING,
VWRBTR TYPE STRING,
KIDNO TYPE STRING,
ZUONR TYPE STRING,
REBZG TYPE STRING,
REBZJ TYPE STRING,
REBZZ TYPE STRING,
BLARTTXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FIAPQA_S_PREQHEADER_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_FIAPQA_S_PREQHEADER_STR-BUKRS sy-vline 
WA_FIAPQA_S_PREQHEADER_STR-BELNR sy-vline 
WA_FIAPQA_S_PREQHEADER_STR-GJAHR sy-vline 
WA_FIAPQA_S_PREQHEADER_STR-BLART sy-vline 
WA_FIAPQA_S_PREQHEADER_STR-BLDAT sy-vline 
WA_FIAPQA_S_PREQHEADER_STR-BUDAT sy-vline 
WA_FIAPQA_S_PREQHEADER_STR-RSTAT sy-vline 
WA_FIAPQA_S_PREQHEADER_STR-WWERT sy-vline 
WA_FIAPQA_S_PREQHEADER_STR-LIFNR sy-vline 
WA_FIAPQA_S_PREQHEADER_STR-XBLNR sy-vline 
WA_FIAPQA_S_PREQHEADER_STR-PREQWRBTR sy-vline 
WA_FIAPQA_S_PREQHEADER_STR-WAERS sy-vline 
WA_FIAPQA_S_PREQHEADER_STR-NAME1 sy-vline 
WA_FIAPQA_S_PREQHEADER_STR-BUTXT sy-vline 
WA_FIAPQA_S_PREQHEADER_STR-BUZEIV sy-vline 
WA_FIAPQA_S_PREQHEADER_STR-ZFBDT sy-vline 
WA_FIAPQA_S_PREQHEADER_STR-BKTXT sy-vline 
WA_FIAPQA_S_PREQHEADER_STR-XBLNR1 sy-vline 
WA_FIAPQA_S_PREQHEADER_STR-SGTXT sy-vline 
WA_FIAPQA_S_PREQHEADER_STR-VWRBTR sy-vline 
WA_FIAPQA_S_PREQHEADER_STR-KIDNO sy-vline 
WA_FIAPQA_S_PREQHEADER_STR-ZUONR sy-vline 
WA_FIAPQA_S_PREQHEADER_STR-REBZG sy-vline 
WA_FIAPQA_S_PREQHEADER_STR-REBZJ sy-vline 
WA_FIAPQA_S_PREQHEADER_STR-REBZZ sy-vline 
WA_FIAPQA_S_PREQHEADER_STR-BLARTTXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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