ABAP Select data from SAP table /MERP/MM_MATDOC_ENTITY_STR into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /MERP/MM_MATDOC_ENTITY_STR 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 /MERP/MM_MATDOC_ENTITY_STR. 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 /MERP/MM_MATDOC_ENTITY_STR 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_/MERP/MM_MATDOC_ENTITY_STR TYPE STANDARD TABLE OF /MERP/MM_MATDOC_ENTITY_STR,
      WA_/MERP/MM_MATDOC_ENTITY_STR TYPE /MERP/MM_MATDOC_ENTITY_STR,
      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: </MERP/MM_MATDOC_ENTITY_STR> TYPE /MERP/MM_MATDOC_ENTITY_STR.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /MERP/MM_MATDOC_ENTITY_STR
  INTO TABLE IT_/MERP/MM_MATDOC_ENTITY_STR.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /MERP/MM_MATDOC_ENTITY_STR
*  INTO TABLE @DATA(IT_/MERP/MM_MATDOC_ENTITY_STR2).
*--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_/MERP/MM_MATDOC_ENTITY_STR INDEX 1 INTO DATA(WA_/MERP/MM_MATDOC_ENTITY_STR2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/MERP/MM_MATDOC_ENTITY_STR ASSIGNING </MERP/MM_MATDOC_ENTITY_STR>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</MERP/MM_MATDOC_ENTITY_STR>-MANDT = 1.
</MERP/MM_MATDOC_ENTITY_STR>-MBLNR = 1.
</MERP/MM_MATDOC_ENTITY_STR>-MJAHR = 1.
</MERP/MM_MATDOC_ENTITY_STR>-VGART = 1.
</MERP/MM_MATDOC_ENTITY_STR>-BLART = 1.

ENDLOOP.

LOOP AT IT_/MERP/MM_MATDOC_ENTITY_STR INTO WA_/MERP/MM_MATDOC_ENTITY_STR.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/MERP/MM_MATDOC_ENTITY_STR-BLAUM, sy-vline,
  WA_/MERP/MM_MATDOC_ENTITY_STR-BLDAT, sy-vline,
  WA_/MERP/MM_MATDOC_ENTITY_STR-BUDAT, sy-vline,
  WA_/MERP/MM_MATDOC_ENTITY_STR-CPUDT, sy-vline,
  WA_/MERP/MM_MATDOC_ENTITY_STR-CPUTM, sy-vline,
  WA_/MERP/MM_MATDOC_ENTITY_STR-AEDAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/MERP/MM_MATDOC_ENTITY_STR 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_/MERP/MM_MATDOC_ENTITY_STR 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_/MERP/MM_MATDOC_ENTITY_STR INTO WA_/MERP/MM_MATDOC_ENTITY_STR.


*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 MBLNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/MERP/MM_MATDOC_ENTITY_STR-MBLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/MERP/MM_MATDOC_ENTITY_STR-MBLNR.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

*Conversion exit ALPHA, internal->external for field SPE_LOGSYS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/MERP/MM_MATDOC_ENTITY_STR-SPE_LOGSYS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/MERP/MM_MATDOC_ENTITY_STR-SPE_LOGSYS.
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_/MERP/MM_MATDOC_ENTITY_STR_STR, 
MANDT TYPE STRING,
MBLNR TYPE STRING,
MJAHR TYPE STRING,
VGART TYPE STRING,
BLART TYPE STRING,
BLAUM TYPE STRING,
BLDAT TYPE STRING,
BUDAT TYPE STRING,
CPUDT TYPE STRING,
CPUTM TYPE STRING,
AEDAT TYPE STRING,
USNAM TYPE STRING,
TCODE TYPE STRING,
XBLNR TYPE STRING,
BKTXT TYPE STRING,
FRATH TYPE STRING,
FRBNR TYPE STRING,
WEVER TYPE STRING,
XABLN TYPE STRING,
AWSYS TYPE STRING,
BLA2D TYPE STRING,
TCODE2 TYPE STRING,
BFWMS TYPE STRING,
EXNUM TYPE STRING,
SPE_BUDAT_UHR TYPE STRING,
SPE_BUDAT_ZONE TYPE STRING,
LE_VBELN TYPE STRING,
SPE_LOGSYS TYPE STRING,
SPE_MDNUM_EWM TYPE STRING,
GTS_CUSREF_NO TYPE STRING,
FLS_RSTO TYPE STRING,
MSR_ACTIVE TYPE STRING,
KNUMV TYPE STRING,
XCOMPL TYPE STRING,
GM_CODE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/MERP/MM_MATDOC_ENTITY_STR_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_/MERP/MM_MATDOC_ENTITY_STR_STR-MANDT sy-vline 
WA_/MERP/MM_MATDOC_ENTITY_STR_STR-MBLNR sy-vline 
WA_/MERP/MM_MATDOC_ENTITY_STR_STR-MJAHR sy-vline 
WA_/MERP/MM_MATDOC_ENTITY_STR_STR-VGART sy-vline 
WA_/MERP/MM_MATDOC_ENTITY_STR_STR-BLART sy-vline 
WA_/MERP/MM_MATDOC_ENTITY_STR_STR-BLAUM sy-vline 
WA_/MERP/MM_MATDOC_ENTITY_STR_STR-BLDAT sy-vline 
WA_/MERP/MM_MATDOC_ENTITY_STR_STR-BUDAT sy-vline 
WA_/MERP/MM_MATDOC_ENTITY_STR_STR-CPUDT sy-vline 
WA_/MERP/MM_MATDOC_ENTITY_STR_STR-CPUTM sy-vline 
WA_/MERP/MM_MATDOC_ENTITY_STR_STR-AEDAT sy-vline 
WA_/MERP/MM_MATDOC_ENTITY_STR_STR-USNAM sy-vline 
WA_/MERP/MM_MATDOC_ENTITY_STR_STR-TCODE sy-vline 
WA_/MERP/MM_MATDOC_ENTITY_STR_STR-XBLNR sy-vline 
WA_/MERP/MM_MATDOC_ENTITY_STR_STR-BKTXT sy-vline 
WA_/MERP/MM_MATDOC_ENTITY_STR_STR-FRATH sy-vline 
WA_/MERP/MM_MATDOC_ENTITY_STR_STR-FRBNR sy-vline 
WA_/MERP/MM_MATDOC_ENTITY_STR_STR-WEVER sy-vline 
WA_/MERP/MM_MATDOC_ENTITY_STR_STR-XABLN sy-vline 
WA_/MERP/MM_MATDOC_ENTITY_STR_STR-AWSYS sy-vline 
WA_/MERP/MM_MATDOC_ENTITY_STR_STR-BLA2D sy-vline 
WA_/MERP/MM_MATDOC_ENTITY_STR_STR-TCODE2 sy-vline 
WA_/MERP/MM_MATDOC_ENTITY_STR_STR-BFWMS sy-vline 
WA_/MERP/MM_MATDOC_ENTITY_STR_STR-EXNUM sy-vline 
WA_/MERP/MM_MATDOC_ENTITY_STR_STR-SPE_BUDAT_UHR sy-vline 
WA_/MERP/MM_MATDOC_ENTITY_STR_STR-SPE_BUDAT_ZONE sy-vline 
WA_/MERP/MM_MATDOC_ENTITY_STR_STR-LE_VBELN sy-vline 
WA_/MERP/MM_MATDOC_ENTITY_STR_STR-SPE_LOGSYS sy-vline 
WA_/MERP/MM_MATDOC_ENTITY_STR_STR-SPE_MDNUM_EWM sy-vline 
WA_/MERP/MM_MATDOC_ENTITY_STR_STR-GTS_CUSREF_NO sy-vline 
WA_/MERP/MM_MATDOC_ENTITY_STR_STR-FLS_RSTO sy-vline 
WA_/MERP/MM_MATDOC_ENTITY_STR_STR-MSR_ACTIVE sy-vline 
WA_/MERP/MM_MATDOC_ENTITY_STR_STR-KNUMV sy-vline 
WA_/MERP/MM_MATDOC_ENTITY_STR_STR-XCOMPL sy-vline 
WA_/MERP/MM_MATDOC_ENTITY_STR_STR-GM_CODE sy-vline      INTO ld_text SEPARATED BY SPACE.

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