ABAP Select data from SAP table PMX06 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PMX06 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 PMX06. 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 PMX06 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_PMX06 TYPE STANDARD TABLE OF PMX06,
      WA_PMX06 TYPE PMX06,
      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: <PMX06> TYPE PMX06.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PMX06.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PMX06
  INTO TABLE IT_PMX06.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PMX06
*  INTO TABLE @DATA(IT_PMX062).
*--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_PMX06 INDEX 1 INTO DATA(WA_PMX062).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PMX06 ASSIGNING <PMX06>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PMX06>-REPAT = 1.
<PMX06>-NIMSS = 1.
<PMX06>-RFC = 1.
<PMX06>-CURP = 1.
<PMX06>-NOMBRE = 1.

ENDLOOP.

LOOP AT IT_PMX06 INTO WA_PMX06.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PMX06-TIPOTRAB, sy-vline,
  WA_PMX06-JORED, sy-vline,
  WA_PMX06-DATE, sy-vline,
  WA_PMX06-SDI, sy-vline,
  WA_PMX06-CVEUBIC, sy-vline,
  WA_PMX06-NUCRI, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PMX06 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_PMX06 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_PMX06 INTO WA_PMX06.


*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_PMX06_STR, 
REPAT TYPE STRING,
NIMSS TYPE STRING,
RFC TYPE STRING,
CURP TYPE STRING,
NOMBRE TYPE STRING,
TIPOTRAB TYPE STRING,
JORED TYPE STRING,
DATE TYPE STRING,
SDI TYPE STRING,
CVEUBIC TYPE STRING,
NUCRI TYPE STRING,
FCRED TYPE STRING,
TDINF TYPE STRING,
VDESC TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PMX06_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_PMX06_STR-REPAT sy-vline 
WA_PMX06_STR-NIMSS sy-vline 
WA_PMX06_STR-RFC sy-vline 
WA_PMX06_STR-CURP sy-vline 
WA_PMX06_STR-NOMBRE sy-vline 
WA_PMX06_STR-TIPOTRAB sy-vline 
WA_PMX06_STR-JORED sy-vline 
WA_PMX06_STR-DATE sy-vline 
WA_PMX06_STR-SDI sy-vline 
WA_PMX06_STR-CVEUBIC sy-vline 
WA_PMX06_STR-NUCRI sy-vline 
WA_PMX06_STR-FCRED sy-vline 
WA_PMX06_STR-TDINF sy-vline 
WA_PMX06_STR-VDESC sy-vline      INTO ld_text SEPARATED BY SPACE.

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