ABAP Select data from SAP table M_PREMM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM M_PREMM
*  INTO TABLE @DATA(IT_M_PREMM2).
*--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_M_PREMM INDEX 1 INTO DATA(WA_M_PREMM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<M_PREMM>-MANDT = 1.
<M_PREMM>-TMJHR = 1.
<M_PREMM>-TMMON = 1.
<M_PREMM>-TMTAG = 1.
<M_PREMM>-MNJHR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_M_PREMM-MNMON, sy-vline,
  WA_M_PREMM-MNTAG, sy-vline,
  WA_M_PREMM-TMART, sy-vline,
  WA_M_PREMM-BVMRK, sy-vline,
  WA_M_PREMM-PERNR, sy-vline,
  WA_M_PREMM-ENAME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_M_PREMM 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_M_PREMM 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_M_PREMM INTO WA_M_PREMM.


*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.

*Conversion exit GJAHR, internal->external for field TMJHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_M_PREMM-TMJHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_M_PREMM-TMJHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field MNJHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_M_PREMM-MNJHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_M_PREMM-MNJHR.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_M_PREMM_STR, 
MANDT TYPE STRING,
TMJHR TYPE STRING,
TMMON TYPE STRING,
TMTAG TYPE STRING,
MNJHR TYPE STRING,
MNMON TYPE STRING,
MNTAG TYPE STRING,
TMART TYPE STRING,
BVMRK TYPE STRING,
PERNR TYPE STRING,
ENAME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_M_PREMM_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_M_PREMM_STR-MANDT sy-vline 
WA_M_PREMM_STR-TMJHR sy-vline 
WA_M_PREMM_STR-TMMON sy-vline 
WA_M_PREMM_STR-TMTAG sy-vline 
WA_M_PREMM_STR-MNJHR sy-vline 
WA_M_PREMM_STR-MNMON sy-vline 
WA_M_PREMM_STR-MNTAG sy-vline 
WA_M_PREMM_STR-TMART sy-vline 
WA_M_PREMM_STR-BVMRK sy-vline 
WA_M_PREMM_STR-PERNR sy-vline 
WA_M_PREMM_STR-ENAME sy-vline      INTO ld_text SEPARATED BY SPACE.

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