ABAP Select data from SAP table MMPUR_SES_HEADER_DATA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MMPUR_SES_HEADER_DATA
*  INTO TABLE @DATA(IT_MMPUR_SES_HEADER_DATA2).
*--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_MMPUR_SES_HEADER_DATA INDEX 1 INTO DATA(WA_MMPUR_SES_HEADER_DATA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MMPUR_SES_HEADER_DATA>-CREA_DATE_TIME = 1.
<MMPUR_SES_HEADER_DATA>-CREA_UNAME = 1.
<MMPUR_SES_HEADER_DATA>-LCHG_DATE_TIME = 1.
<MMPUR_SES_HEADER_DATA>-LCHG_UNAME = 1.
<MMPUR_SES_HEADER_DATA>-SUPPLIER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MMPUR_SES_HEADER_DATA-NAME, sy-vline,
  WA_MMPUR_SES_HEADER_DATA-DELETIONCODE, sy-vline,
  WA_MMPUR_SES_HEADER_DATA-APPROVALSTATUS, sy-vline,
  WA_MMPUR_SES_HEADER_DATA-RESPONSIBLEPERSON, sy-vline,
  WA_MMPUR_SES_HEADER_DATA-REFERENCEPURCHASEORDER, sy-vline,
  WA_MMPUR_SES_HEADER_DATA-APPROVAL_DATE_TIME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MMPUR_SES_HEADER_DATA 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_MMPUR_SES_HEADER_DATA 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_MMPUR_SES_HEADER_DATA INTO WA_MMPUR_SES_HEADER_DATA.


*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 ALPHA, internal->external for field SUPPLIER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MMPUR_SES_HEADER_DATA-SUPPLIER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMPUR_SES_HEADER_DATA-SUPPLIER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field REFERENCEPURCHASEORDER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MMPUR_SES_HEADER_DATA-REFERENCEPURCHASEORDER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMPUR_SES_HEADER_DATA-REFERENCEPURCHASEORDER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field MBLNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MMPUR_SES_HEADER_DATA-MBLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMPUR_SES_HEADER_DATA-MBLNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field MJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_MMPUR_SES_HEADER_DATA-MJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMPUR_SES_HEADER_DATA-MJAHR.
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_MMPUR_SES_HEADER_DATA_STR, 
CREA_DATE_TIME TYPE STRING,
CREA_UNAME TYPE STRING,
LCHG_DATE_TIME TYPE STRING,
LCHG_UNAME TYPE STRING,
SUPPLIER TYPE STRING,
NAME TYPE STRING,
DELETIONCODE TYPE STRING,
APPROVALSTATUS TYPE STRING,
RESPONSIBLEPERSON TYPE STRING,
REFERENCEPURCHASEORDER TYPE STRING,
APPROVAL_DATE_TIME TYPE STRING,
ORIGINOBJECTTYPE TYPE STRING,
CURRENCY TYPE STRING,
PURCHASINGORGANIZATION TYPE STRING,
PURCHASINGGROUP TYPE STRING,
MBLNR TYPE STRING,
MJAHR TYPE STRING,
ISEOPBLOCKED TYPE STRING,
EXTERNALSYSTEM TYPE STRING,
EXTERNALREFERENCEID TYPE STRING,
POSTINGDATE TYPE STRING,
EXT_REV_TMSTMP TYPE STRING,
KNUMV TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MMPUR_SES_HEADER_DATA_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_MMPUR_SES_HEADER_DATA_STR-CREA_DATE_TIME sy-vline 
WA_MMPUR_SES_HEADER_DATA_STR-CREA_UNAME sy-vline 
WA_MMPUR_SES_HEADER_DATA_STR-LCHG_DATE_TIME sy-vline 
WA_MMPUR_SES_HEADER_DATA_STR-LCHG_UNAME sy-vline 
WA_MMPUR_SES_HEADER_DATA_STR-SUPPLIER sy-vline 
WA_MMPUR_SES_HEADER_DATA_STR-NAME sy-vline 
WA_MMPUR_SES_HEADER_DATA_STR-DELETIONCODE sy-vline 
WA_MMPUR_SES_HEADER_DATA_STR-APPROVALSTATUS sy-vline 
WA_MMPUR_SES_HEADER_DATA_STR-RESPONSIBLEPERSON sy-vline 
WA_MMPUR_SES_HEADER_DATA_STR-REFERENCEPURCHASEORDER sy-vline 
WA_MMPUR_SES_HEADER_DATA_STR-APPROVAL_DATE_TIME sy-vline 
WA_MMPUR_SES_HEADER_DATA_STR-ORIGINOBJECTTYPE sy-vline 
WA_MMPUR_SES_HEADER_DATA_STR-CURRENCY sy-vline 
WA_MMPUR_SES_HEADER_DATA_STR-PURCHASINGORGANIZATION sy-vline 
WA_MMPUR_SES_HEADER_DATA_STR-PURCHASINGGROUP sy-vline 
WA_MMPUR_SES_HEADER_DATA_STR-MBLNR sy-vline 
WA_MMPUR_SES_HEADER_DATA_STR-MJAHR sy-vline 
WA_MMPUR_SES_HEADER_DATA_STR-ISEOPBLOCKED sy-vline 
WA_MMPUR_SES_HEADER_DATA_STR-EXTERNALSYSTEM sy-vline 
WA_MMPUR_SES_HEADER_DATA_STR-EXTERNALREFERENCEID sy-vline 
WA_MMPUR_SES_HEADER_DATA_STR-POSTINGDATE sy-vline 
WA_MMPUR_SES_HEADER_DATA_STR-EXT_REV_TMSTMP sy-vline 
WA_MMPUR_SES_HEADER_DATA_STR-KNUMV sy-vline      INTO ld_text SEPARATED BY SPACE.

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