ABAP Select data from SAP table UM4PMIG into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP UM4PMIG 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 UM4PMIG. 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 UM4PMIG 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_UM4PMIG TYPE STANDARD TABLE OF UM4PMIG,
      WA_UM4PMIG TYPE UM4PMIG,
      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: <UM4PMIG> TYPE UM4PMIG.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_UM4PMIG.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM UM4PMIG
  INTO TABLE IT_UM4PMIG.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM UM4PMIG
*  INTO TABLE @DATA(IT_UM4PMIG2).
*--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_UM4PMIG INDEX 1 INTO DATA(WA_UM4PMIG2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_UM4PMIG ASSIGNING <UM4PMIG>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<UM4PMIG>-LEV = 1.
<UM4PMIG>-TABNAME = 1.
<UM4PMIG>-TABID = 1.
<UM4PMIG>-STATUS = 1.
<UM4PMIG>-ERRTYPE = 1.

ENDLOOP.

LOOP AT IT_UM4PMIG INTO WA_UM4PMIG.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_UM4PMIG-TABTYPE, sy-vline,
  WA_UM4PMIG-TABFORM, sy-vline,
  WA_UM4PMIG-ROWNUMERR, sy-vline,
  WA_UM4PMIG-ROWNUMTOT, sy-vline,
  WA_UM4PMIG-LED, sy-vline,
  WA_UM4PMIG-TABSZMAX, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_UM4PMIG 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_UM4PMIG 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_UM4PMIG INTO WA_UM4PMIG.


*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_UM4PMIG_STR, 
LEV TYPE STRING,
TABNAME TYPE STRING,
TABID TYPE STRING,
STATUS TYPE STRING,
ERRTYPE TYPE STRING,
TABTYPE TYPE STRING,
TABFORM TYPE STRING,
ROWNUMERR TYPE STRING,
ROWNUMTOT TYPE STRING,
LED TYPE STRING,
TABSZMAX TYPE STRING,
TABSIZE TYPE STRING,
TABSZCHAR TYPE STRING,
DEVCLASS TYPE STRING,
DOIGNORE TYPE STRING,
MULTLANG TYPE STRING,
HINTREQ TYPE STRING,
HINTGEN TYPE STRING,
LOG TYPE STRING,
SDATE TYPE STRING,
STIME TYPE STRING,
HDATE TYPE STRING,
HTIME TYPE STRING,
ADDERROR TYPE STRING,
SCANTIME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_UM4PMIG_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_UM4PMIG_STR-LEV sy-vline 
WA_UM4PMIG_STR-TABNAME sy-vline 
WA_UM4PMIG_STR-TABID sy-vline 
WA_UM4PMIG_STR-STATUS sy-vline 
WA_UM4PMIG_STR-ERRTYPE sy-vline 
WA_UM4PMIG_STR-TABTYPE sy-vline 
WA_UM4PMIG_STR-TABFORM sy-vline 
WA_UM4PMIG_STR-ROWNUMERR sy-vline 
WA_UM4PMIG_STR-ROWNUMTOT sy-vline 
WA_UM4PMIG_STR-LED sy-vline 
WA_UM4PMIG_STR-TABSZMAX sy-vline 
WA_UM4PMIG_STR-TABSIZE sy-vline 
WA_UM4PMIG_STR-TABSZCHAR sy-vline 
WA_UM4PMIG_STR-DEVCLASS sy-vline 
WA_UM4PMIG_STR-DOIGNORE sy-vline 
WA_UM4PMIG_STR-MULTLANG sy-vline 
WA_UM4PMIG_STR-HINTREQ sy-vline 
WA_UM4PMIG_STR-HINTGEN sy-vline 
WA_UM4PMIG_STR-LOG sy-vline 
WA_UM4PMIG_STR-SDATE sy-vline 
WA_UM4PMIG_STR-STIME sy-vline 
WA_UM4PMIG_STR-HDATE sy-vline 
WA_UM4PMIG_STR-HTIME sy-vline 
WA_UM4PMIG_STR-ADDERROR sy-vline 
WA_UM4PMIG_STR-SCANTIME sy-vline      INTO ld_text SEPARATED BY SPACE.

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