ABAP Select data from SAP table PMXP_ISSSTE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PMXP_ISSSTE
*  INTO TABLE @DATA(IT_PMXP_ISSSTE2).
*--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_PMXP_ISSSTE INDEX 1 INTO DATA(WA_PMXP_ISSSTE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PMXP_ISSSTE>-RAMO = 1.
<PMXP_ISSSTE>-PAGAD = 1.
<PMXP_ISSSTE>-NUMERO = 1.
<PMXP_ISSSTE>-RFCVER = 1.
<PMXP_ISSSTE>-NAME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PMXP_ISSSTE-COBRO, sy-vline,
  WA_PMXP_ISSSTE-STATS, sy-vline,
  WA_PMXP_ISSSTE-PLAZO, sy-vline,
  WA_PMXP_ISSSTE-FROMP, sy-vline,
  WA_PMXP_ISSSTE-TOP, sy-vline,
  WA_PMXP_ISSSTE-RETCOD, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PMXP_ISSSTE 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_PMXP_ISSSTE 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_PMXP_ISSSTE INTO WA_PMXP_ISSSTE.


*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_PMXP_ISSSTE_STR, 
RAMO TYPE STRING,
PAGAD TYPE STRING,
NUMERO TYPE STRING,
RFCVER TYPE STRING,
NAME TYPE STRING,
COBRO TYPE STRING,
STATS TYPE STRING,
PLAZO TYPE STRING,
FROMP TYPE STRING,
TOP TYPE STRING,
RETCOD TYPE STRING,
AMOUNT TYPE STRING,
LOANN TYPE STRING,
CURP TYPE STRING,
TIPREG TYPE STRING,
COMMENTS TYPE STRING,
PERNR TYPE STRING,
ICON TYPE STRING,
MSG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PMXP_ISSSTE_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_PMXP_ISSSTE_STR-RAMO sy-vline 
WA_PMXP_ISSSTE_STR-PAGAD sy-vline 
WA_PMXP_ISSSTE_STR-NUMERO sy-vline 
WA_PMXP_ISSSTE_STR-RFCVER sy-vline 
WA_PMXP_ISSSTE_STR-NAME sy-vline 
WA_PMXP_ISSSTE_STR-COBRO sy-vline 
WA_PMXP_ISSSTE_STR-STATS sy-vline 
WA_PMXP_ISSSTE_STR-PLAZO sy-vline 
WA_PMXP_ISSSTE_STR-FROMP sy-vline 
WA_PMXP_ISSSTE_STR-TOP sy-vline 
WA_PMXP_ISSSTE_STR-RETCOD sy-vline 
WA_PMXP_ISSSTE_STR-AMOUNT sy-vline 
WA_PMXP_ISSSTE_STR-LOANN sy-vline 
WA_PMXP_ISSSTE_STR-CURP sy-vline 
WA_PMXP_ISSSTE_STR-TIPREG sy-vline 
WA_PMXP_ISSSTE_STR-COMMENTS sy-vline 
WA_PMXP_ISSSTE_STR-PERNR sy-vline 
WA_PMXP_ISSSTE_STR-ICON sy-vline 
WA_PMXP_ISSSTE_STR-MSG sy-vline      INTO ld_text SEPARATED BY SPACE.

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