ABAP Select data from SAP table P08_MMR299 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P08_MMR299 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 P08_MMR299. 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 P08_MMR299 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_P08_MMR299 TYPE STANDARD TABLE OF P08_MMR299,
      WA_P08_MMR299 TYPE P08_MMR299,
      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: <P08_MMR299> TYPE P08_MMR299.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P08_MMR299.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P08_MMR299
  INTO TABLE IT_P08_MMR299.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P08_MMR299
*  INTO TABLE @DATA(IT_P08_MMR2992).
*--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_P08_MMR299 INDEX 1 INTO DATA(WA_P08_MMR2992).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P08_MMR299 ASSIGNING <P08_MMR299>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P08_MMR299>-ID2 = 1.
<P08_MMR299>-PERNR = 1.
<P08_MMR299>-SURNA = 1.
<P08_MMR299>-FIRNA = 1.
<P08_MMR299>-SECNA = 1.

ENDLOOP.

LOOP AT IT_P08_MMR299 INTO WA_P08_MMR299.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P08_MMR299-DOB, sy-vline,
  WA_P08_MMR299-GENDR, sy-vline,
  WA_P08_MMR299-ADDR1, sy-vline,
  WA_P08_MMR299-ADDR2, sy-vline,
  WA_P08_MMR299-ADDR3, sy-vline,
  WA_P08_MMR299-ADDR4, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P08_MMR299 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_P08_MMR299 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_P08_MMR299 INTO WA_P08_MMR299.


*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_P08_MMR299_STR, 
ID2 TYPE STRING,
PERNR TYPE STRING,
SURNA TYPE STRING,
FIRNA TYPE STRING,
SECNA TYPE STRING,
DOB TYPE STRING,
GENDR TYPE STRING,
ADDR1 TYPE STRING,
ADDR2 TYPE STRING,
ADDR3 TYPE STRING,
ADDR4 TYPE STRING,
PCODE TYPE STRING,
TXCOD TYPE STRING,
W1M1 TYPE STRING,
NINUM TYPE STRING,
SP35 TYPE STRING,
NCAT1 TYPE STRING,
NLEL1 TYPE STRING,
NERT1 TYPE STRING,
NUEL1 TYPE STRING,
NTOT1 TYPE STRING,
EECO1 TYPE STRING,
SCON1 TYPE STRING,
SP101 TYPE STRING,
NIERR TYPE STRING,
SSP TYPE STRING,
SMP TYPE STRING,
GROSS TYPE STRING,
TAX TYPE STRING,
TXREF TYPE STRING,
PREPY TYPE STRING,
PRETX TYPE STRING,
HIRE TYPE STRING,
FIRE TYPE STRING,
SUPER TYPE STRING,
SUREF TYPE STRING,
LIFE TYPE STRING,
WKID TYPE STRING,
TXPAY TYPE STRING,
PENID TYPE STRING,
DIRID TYPE STRING,
NCAT2 TYPE STRING,
NLEL2 TYPE STRING,
NERT2 TYPE STRING,
NUEL2 TYPE STRING,
NTOT2 TYPE STRING,
EECO2 TYPE STRING,
SCON2 TYPE STRING,
SP102 TYPE STRING,
NCAT3 TYPE STRING,
NLEL3 TYPE STRING,
NERT3 TYPE STRING,
NUEL3 TYPE STRING,
NTOT3 TYPE STRING,
EECO3 TYPE STRING,
SCON3 TYPE STRING,
SP103 TYPE STRING,
NCAT4 TYPE STRING,
NLEL4 TYPE STRING,
NERT4 TYPE STRING,
NUEL4 TYPE STRING,
NTOT4 TYPE STRING,
EECO4 TYPE STRING,
SCON4 TYPE STRING,
SP21 TYPE STRING,
CTRL2 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P08_MMR299_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_P08_MMR299_STR-ID2 sy-vline 
WA_P08_MMR299_STR-PERNR sy-vline 
WA_P08_MMR299_STR-SURNA sy-vline 
WA_P08_MMR299_STR-FIRNA sy-vline 
WA_P08_MMR299_STR-SECNA sy-vline 
WA_P08_MMR299_STR-DOB sy-vline 
WA_P08_MMR299_STR-GENDR sy-vline 
WA_P08_MMR299_STR-ADDR1 sy-vline 
WA_P08_MMR299_STR-ADDR2 sy-vline 
WA_P08_MMR299_STR-ADDR3 sy-vline 
WA_P08_MMR299_STR-ADDR4 sy-vline 
WA_P08_MMR299_STR-PCODE sy-vline 
WA_P08_MMR299_STR-TXCOD sy-vline 
WA_P08_MMR299_STR-W1M1 sy-vline 
WA_P08_MMR299_STR-NINUM sy-vline 
WA_P08_MMR299_STR-SP35 sy-vline 
WA_P08_MMR299_STR-NCAT1 sy-vline 
WA_P08_MMR299_STR-NLEL1 sy-vline 
WA_P08_MMR299_STR-NERT1 sy-vline 
WA_P08_MMR299_STR-NUEL1 sy-vline 
WA_P08_MMR299_STR-NTOT1 sy-vline 
WA_P08_MMR299_STR-EECO1 sy-vline 
WA_P08_MMR299_STR-SCON1 sy-vline 
WA_P08_MMR299_STR-SP101 sy-vline 
WA_P08_MMR299_STR-NIERR sy-vline 
WA_P08_MMR299_STR-SSP sy-vline 
WA_P08_MMR299_STR-SMP sy-vline 
WA_P08_MMR299_STR-GROSS sy-vline 
WA_P08_MMR299_STR-TAX sy-vline 
WA_P08_MMR299_STR-TXREF sy-vline 
WA_P08_MMR299_STR-PREPY sy-vline 
WA_P08_MMR299_STR-PRETX sy-vline 
WA_P08_MMR299_STR-HIRE sy-vline 
WA_P08_MMR299_STR-FIRE sy-vline 
WA_P08_MMR299_STR-SUPER sy-vline 
WA_P08_MMR299_STR-SUREF sy-vline 
WA_P08_MMR299_STR-LIFE sy-vline 
WA_P08_MMR299_STR-WKID sy-vline 
WA_P08_MMR299_STR-TXPAY sy-vline 
WA_P08_MMR299_STR-PENID sy-vline 
WA_P08_MMR299_STR-DIRID sy-vline 
WA_P08_MMR299_STR-NCAT2 sy-vline 
WA_P08_MMR299_STR-NLEL2 sy-vline 
WA_P08_MMR299_STR-NERT2 sy-vline 
WA_P08_MMR299_STR-NUEL2 sy-vline 
WA_P08_MMR299_STR-NTOT2 sy-vline 
WA_P08_MMR299_STR-EECO2 sy-vline 
WA_P08_MMR299_STR-SCON2 sy-vline 
WA_P08_MMR299_STR-SP102 sy-vline 
WA_P08_MMR299_STR-NCAT3 sy-vline 
WA_P08_MMR299_STR-NLEL3 sy-vline 
WA_P08_MMR299_STR-NERT3 sy-vline 
WA_P08_MMR299_STR-NUEL3 sy-vline 
WA_P08_MMR299_STR-NTOT3 sy-vline 
WA_P08_MMR299_STR-EECO3 sy-vline 
WA_P08_MMR299_STR-SCON3 sy-vline 
WA_P08_MMR299_STR-SP103 sy-vline 
WA_P08_MMR299_STR-NCAT4 sy-vline 
WA_P08_MMR299_STR-NLEL4 sy-vline 
WA_P08_MMR299_STR-NERT4 sy-vline 
WA_P08_MMR299_STR-NUEL4 sy-vline 
WA_P08_MMR299_STR-NTOT4 sy-vline 
WA_P08_MMR299_STR-EECO4 sy-vline 
WA_P08_MMR299_STR-SCON4 sy-vline 
WA_P08_MMR299_STR-SP21 sy-vline 
WA_P08_MMR299_STR-CTRL2 sy-vline      INTO ld_text SEPARATED BY SPACE.

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