ABAP Select data from SAP table PQAP_PS into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PQAP_PS 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_PS. 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_PS 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_PS TYPE STANDARD TABLE OF PQAP_PS,
      WA_PQAP_PS TYPE PQAP_PS,
      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_PS> TYPE PQAP_PS.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PQAP_PS
*  INTO TABLE @DATA(IT_PQAP_PS2).
*--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_PS INDEX 1 INTO DATA(WA_PQAP_PS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PQAP_PS>-CNTR2 = 1.
<PQAP_PS>-BEGDA = 1.
<PQAP_PS>-ENDDA = 1.
<PQAP_PS>-NATIO = 1.
<PQAP_PS>-EEERL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PQAP_PS-EXRSN, sy-vline,
  WA_PQAP_PS-EEPNO, sy-vline,
  WA_PQAP_PS-WOTYP, sy-vline,
  WA_PQAP_PS-RBTOS, sy-vline,
  WA_PQAP_PS-PSAMT, sy-vline,
  WA_PQAP_PS-WAERS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PQAP_PS 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_PS 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_PS INTO WA_PQAP_PS.


*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_PS_STR, 
CNTR2 TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,
NATIO TYPE STRING,
EEERL TYPE STRING,
EXRSN TYPE STRING,
EEPNO TYPE STRING,
WOTYP TYPE STRING,
RBTOS TYPE STRING,
PSAMT TYPE STRING,
WAERS TYPE STRING,
SERDY TYPE STRING,
SERDM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PQAP_PS_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_PS_STR-CNTR2 sy-vline 
WA_PQAP_PS_STR-BEGDA sy-vline 
WA_PQAP_PS_STR-ENDDA sy-vline 
WA_PQAP_PS_STR-NATIO sy-vline 
WA_PQAP_PS_STR-EEERL sy-vline 
WA_PQAP_PS_STR-EXRSN sy-vline 
WA_PQAP_PS_STR-EEPNO sy-vline 
WA_PQAP_PS_STR-WOTYP sy-vline 
WA_PQAP_PS_STR-RBTOS sy-vline 
WA_PQAP_PS_STR-PSAMT sy-vline 
WA_PQAP_PS_STR-WAERS sy-vline 
WA_PQAP_PS_STR-SERDY sy-vline 
WA_PQAP_PS_STR-SERDM sy-vline      INTO ld_text SEPARATED BY SPACE.

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