ABAP Select data from SAP table PMX08 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PMX08 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 PMX08. 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 PMX08 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_PMX08 TYPE STANDARD TABLE OF PMX08,
      WA_PMX08 TYPE PMX08,
      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: <PMX08> TYPE PMX08.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PMX08.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PMX08
  INTO TABLE IT_PMX08.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PMX08
*  INTO TABLE @DATA(IT_PMX082).
*--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_PMX08 INDEX 1 INTO DATA(WA_PMX082).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PMX08 ASSIGNING <PMX08>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PMX08>-REPAT = 1.
<PMX08>-NIMSS = 1.
<PMX08>-APATER = 1.
<PMX08>-AMATER = 1.
<PMX08>-NOMBRE = 1.

ENDLOOP.

LOOP AT IT_PMX08 INTO WA_PMX08.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PMX08-SDI, sy-vline,
  WA_PMX08-SPACE6, sy-vline,
  WA_PMX08-TIPOTRAB, sy-vline,
  WA_PMX08-TIPOSAL, sy-vline,
  WA_PMX08-JORED, sy-vline,
  WA_PMX08-FMOVTO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PMX08 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_PMX08 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_PMX08 INTO WA_PMX08.


*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_PMX08_STR, 
REPAT TYPE STRING,
NIMSS TYPE STRING,
APATER TYPE STRING,
AMATER TYPE STRING,
NOMBRE TYPE STRING,
SDI TYPE STRING,
SPACE6 TYPE STRING,
TIPOTRAB TYPE STRING,
TIPOSAL TYPE STRING,
JORED TYPE STRING,
FMOVTO TYPE STRING,
UNMED TYPE STRING,
SPACE2 TYPE STRING,
TIPONOT TYPE STRING,
NUGUI TYPE STRING,
PERNR TYPE STRING,
SPACE1 TYPE STRING,
CURP TYPE STRING,
IFR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PMX08_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_PMX08_STR-REPAT sy-vline 
WA_PMX08_STR-NIMSS sy-vline 
WA_PMX08_STR-APATER sy-vline 
WA_PMX08_STR-AMATER sy-vline 
WA_PMX08_STR-NOMBRE sy-vline 
WA_PMX08_STR-SDI sy-vline 
WA_PMX08_STR-SPACE6 sy-vline 
WA_PMX08_STR-TIPOTRAB sy-vline 
WA_PMX08_STR-TIPOSAL sy-vline 
WA_PMX08_STR-JORED sy-vline 
WA_PMX08_STR-FMOVTO sy-vline 
WA_PMX08_STR-UNMED sy-vline 
WA_PMX08_STR-SPACE2 sy-vline 
WA_PMX08_STR-TIPONOT sy-vline 
WA_PMX08_STR-NUGUI sy-vline 
WA_PMX08_STR-PERNR sy-vline 
WA_PMX08_STR-SPACE1 sy-vline 
WA_PMX08_STR-CURP sy-vline 
WA_PMX08_STR-IFR sy-vline      INTO ld_text SEPARATED BY SPACE.

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