ABAP Select data from SAP table PQAP_HQAPPNSZ_ALV into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PQAP_HQAPPNSZ_ALV
*  INTO TABLE @DATA(IT_PQAP_HQAPPNSZ_ALV2).
*--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_PQAP_HQAPPNSZ_ALV INDEX 1 INTO DATA(WA_PQAP_HQAPPNSZ_ALV2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PQAP_HQAPPNSZ_ALV>-PERNR = 1.
<PQAP_HQAPPNSZ_ALV>-FNAME = 1.
<PQAP_HQAPPNSZ_ALV>-BUKRS = 1.
<PQAP_HQAPPNSZ_ALV>-ABKRS = 1.
<PQAP_HQAPPNSZ_ALV>-BANKS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PQAP_HQAPPNSZ_ALV-BANKL, sy-vline,
  WA_PQAP_HQAPPNSZ_ALV-BANKA, sy-vline,
  WA_PQAP_HQAPPNSZ_ALV-BANAM, sy-vline,
  WA_PQAP_HQAPPNSZ_ALV-WAERS, sy-vline,
  WA_PQAP_HQAPPNSZ_ALV-BANKN, sy-vline,
  WA_PQAP_HQAPPNSZ_ALV-PLANS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PQAP_HQAPPNSZ_ALV 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_PQAP_HQAPPNSZ_ALV 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_PQAP_HQAPPNSZ_ALV INTO WA_PQAP_HQAPPNSZ_ALV.


*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_PQAP_HQAPPNSZ_ALV_STR, 
PERNR TYPE STRING,
FNAME TYPE STRING,
BUKRS TYPE STRING,
ABKRS TYPE STRING,
BANKS TYPE STRING,
BANKL TYPE STRING,
BANKA TYPE STRING,
BANAM TYPE STRING,
WAERS TYPE STRING,
BANKN TYPE STRING,
PLANS TYPE STRING,
ICNUM TYPE STRING,
ORGNM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PQAP_HQAPPNSZ_ALV_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_PQAP_HQAPPNSZ_ALV_STR-PERNR sy-vline 
WA_PQAP_HQAPPNSZ_ALV_STR-FNAME sy-vline 
WA_PQAP_HQAPPNSZ_ALV_STR-BUKRS sy-vline 
WA_PQAP_HQAPPNSZ_ALV_STR-ABKRS sy-vline 
WA_PQAP_HQAPPNSZ_ALV_STR-BANKS sy-vline 
WA_PQAP_HQAPPNSZ_ALV_STR-BANKL sy-vline 
WA_PQAP_HQAPPNSZ_ALV_STR-BANKA sy-vline 
WA_PQAP_HQAPPNSZ_ALV_STR-BANAM sy-vline 
WA_PQAP_HQAPPNSZ_ALV_STR-WAERS sy-vline 
WA_PQAP_HQAPPNSZ_ALV_STR-BANKN sy-vline 
WA_PQAP_HQAPPNSZ_ALV_STR-PLANS sy-vline 
WA_PQAP_HQAPPNSZ_ALV_STR-ICNUM sy-vline 
WA_PQAP_HQAPPNSZ_ALV_STR-ORGNM sy-vline      INTO ld_text SEPARATED BY SPACE.

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