ABAP Select data from SAP table MMIMMDOCDOCFLOW into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MMIMMDOCDOCFLOW
*  INTO TABLE @DATA(IT_MMIMMDOCDOCFLOW2).
*--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_MMIMMDOCDOCFLOW INDEX 1 INTO DATA(WA_MMIMMDOCDOCFLOW2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MMIMMDOCDOCFLOW>-MANDT = 1.
<MMIMMDOCDOCFLOW>-PRECEDINGDOCUMENT = 1.
<MMIMMDOCDOCFLOW>-PRECEDINGDOCUMENTYEAR = 1.
<MMIMMDOCDOCFLOW>-SUBSEQUENTDOCUMENT = 1.
<MMIMMDOCDOCFLOW>-SUBSEQUENTDOCUMENTYEAR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MMIMMDOCDOCFLOW-PRECEDINGDOCUMENTITEM, sy-vline,
  WA_MMIMMDOCDOCFLOW-SUBSEQUENTDOCUMENTITEM, sy-vline,
  WA_MMIMMDOCDOCFLOW-MATERIALDOCUMENT, sy-vline,
  WA_MMIMMDOCDOCFLOW-MATERIALDOCUMENTYEAR, sy-vline,
  WA_MMIMMDOCDOCFLOW-MATERIALDOCUMENTITEM, sy-vline,
  WA_MMIMMDOCDOCFLOW-FISCALYEAR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MMIMMDOCDOCFLOW 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_MMIMMDOCDOCFLOW 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_MMIMMDOCDOCFLOW INTO WA_MMIMMDOCDOCFLOW.


*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 PRECEDINGDOCUMENT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MMIMMDOCDOCFLOW-PRECEDINGDOCUMENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMIMMDOCDOCFLOW-PRECEDINGDOCUMENT.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit GJAHR, internal->external for field MATERIALDOCUMENTYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_MMIMMDOCDOCFLOW-MATERIALDOCUMENTYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMIMMDOCDOCFLOW-MATERIALDOCUMENTYEAR.
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_MMIMMDOCDOCFLOW_STR, 
MANDT TYPE STRING,
PRECEDINGDOCUMENT TYPE STRING,
PRECEDINGDOCUMENTYEAR TYPE STRING,
SUBSEQUENTDOCUMENT TYPE STRING,
SUBSEQUENTDOCUMENTYEAR TYPE STRING,
PRECEDINGDOCUMENTITEM TYPE STRING,
SUBSEQUENTDOCUMENTITEM TYPE STRING,
MATERIALDOCUMENT TYPE STRING,
MATERIALDOCUMENTYEAR TYPE STRING,
MATERIALDOCUMENTITEM TYPE STRING,
FISCALYEAR TYPE STRING,
PRECEDINGDOCUMENTCATEGORY TYPE STRING,
SUBSEQUENTDOCUMENTCATEGORY TYPE STRING,
COMPANYCODE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MMIMMDOCDOCFLOW_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_MMIMMDOCDOCFLOW_STR-MANDT sy-vline 
WA_MMIMMDOCDOCFLOW_STR-PRECEDINGDOCUMENT sy-vline 
WA_MMIMMDOCDOCFLOW_STR-PRECEDINGDOCUMENTYEAR sy-vline 
WA_MMIMMDOCDOCFLOW_STR-SUBSEQUENTDOCUMENT sy-vline 
WA_MMIMMDOCDOCFLOW_STR-SUBSEQUENTDOCUMENTYEAR sy-vline 
WA_MMIMMDOCDOCFLOW_STR-PRECEDINGDOCUMENTITEM sy-vline 
WA_MMIMMDOCDOCFLOW_STR-SUBSEQUENTDOCUMENTITEM sy-vline 
WA_MMIMMDOCDOCFLOW_STR-MATERIALDOCUMENT sy-vline 
WA_MMIMMDOCDOCFLOW_STR-MATERIALDOCUMENTYEAR sy-vline 
WA_MMIMMDOCDOCFLOW_STR-MATERIALDOCUMENTITEM sy-vline 
WA_MMIMMDOCDOCFLOW_STR-FISCALYEAR sy-vline 
WA_MMIMMDOCDOCFLOW_STR-PRECEDINGDOCUMENTCATEGORY sy-vline 
WA_MMIMMDOCDOCFLOW_STR-SUBSEQUENTDOCUMENTCATEGORY sy-vline 
WA_MMIMMDOCDOCFLOW_STR-COMPANYCODE sy-vline      INTO ld_text SEPARATED BY SPACE.

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