ABAP Select data from SAP table PMXLIST_VAC into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PMXLIST_VAC
*  INTO TABLE @DATA(IT_PMXLIST_VAC2).
*--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_PMXLIST_VAC INDEX 1 INTO DATA(WA_PMXLIST_VAC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PMXLIST_VAC>-BOX = 1.
<PMXLIST_VAC>-PERNR = 1.
<PMXLIST_VAC>-STIPO = 1.
<PMXLIST_VAC>-KTART = 1.
<PMXLIST_VAC>-NAME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PMXLIST_VAC-BEGDA, sy-vline,
  WA_PMXLIST_VAC-ENDDA, sy-vline,
  WA_PMXLIST_VAC-ANZHL, sy-vline,
  WA_PMXLIST_VAC-KVERB, sy-vline,
  WA_PMXLIST_VAC-DPDIS, sy-vline,
  WA_PMXLIST_VAC-QREST, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PMXLIST_VAC 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_PMXLIST_VAC 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_PMXLIST_VAC INTO WA_PMXLIST_VAC.


*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_PMXLIST_VAC_STR, 
BOX TYPE STRING,
PERNR TYPE STRING,
STIPO TYPE STRING,
KTART TYPE STRING,
NAME TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,
ANZHL TYPE STRING,
KVERB TYPE STRING,
DPDIS TYPE STRING,
QREST TYPE STRING,
SEQNR TYPE STRING,
QUONR TYPE STRING,
DISPLAY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PMXLIST_VAC_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_PMXLIST_VAC_STR-BOX sy-vline 
WA_PMXLIST_VAC_STR-PERNR sy-vline 
WA_PMXLIST_VAC_STR-STIPO sy-vline 
WA_PMXLIST_VAC_STR-KTART sy-vline 
WA_PMXLIST_VAC_STR-NAME sy-vline 
WA_PMXLIST_VAC_STR-BEGDA sy-vline 
WA_PMXLIST_VAC_STR-ENDDA sy-vline 
WA_PMXLIST_VAC_STR-ANZHL sy-vline 
WA_PMXLIST_VAC_STR-KVERB sy-vline 
WA_PMXLIST_VAC_STR-DPDIS sy-vline 
WA_PMXLIST_VAC_STR-QREST sy-vline 
WA_PMXLIST_VAC_STR-SEQNR sy-vline 
WA_PMXLIST_VAC_STR-QUONR sy-vline 
WA_PMXLIST_VAC_STR-DISPLAY sy-vline      INTO ld_text SEPARATED BY SPACE.

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