ABAP Select data from SAP table MAM_25_MEASMNT_DOC into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP MAM_25_MEASMNT_DOC 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 MAM_25_MEASMNT_DOC. 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 MAM_25_MEASMNT_DOC 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_MAM_25_MEASMNT_DOC TYPE STANDARD TABLE OF MAM_25_MEASMNT_DOC,
      WA_MAM_25_MEASMNT_DOC TYPE MAM_25_MEASMNT_DOC,
      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: <MAM_25_MEASMNT_DOC> TYPE MAM_25_MEASMNT_DOC.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_MAM_25_MEASMNT_DOC.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM MAM_25_MEASMNT_DOC
  INTO TABLE IT_MAM_25_MEASMNT_DOC.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MAM_25_MEASMNT_DOC
*  INTO TABLE @DATA(IT_MAM_25_MEASMNT_DOC2).
*--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_MAM_25_MEASMNT_DOC INDEX 1 INTO DATA(WA_MAM_25_MEASMNT_DOC2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_MAM_25_MEASMNT_DOC ASSIGNING <MAM_25_MEASMNT_DOC>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MAM_25_MEASMNT_DOC>-MDOCM = 1.
<MAM_25_MEASMNT_DOC>-POINT = 1.
<MAM_25_MEASMNT_DOC>-IDATE = 1.
<MAM_25_MEASMNT_DOC>-ITIME = 1.
<MAM_25_MEASMNT_DOC>-INVTS = 1.

ENDLOOP.

LOOP AT IT_MAM_25_MEASMNT_DOC INTO WA_MAM_25_MEASMNT_DOC.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MAM_25_MEASMNT_DOC-CNTRG, sy-vline,
  WA_MAM_25_MEASMNT_DOC-MDTXT, sy-vline,
  WA_MAM_25_MEASMNT_DOC-MLANG, sy-vline,
  WA_MAM_25_MEASMNT_DOC-KZLTX, sy-vline,
  WA_MAM_25_MEASMNT_DOC-READR, sy-vline,
  WA_MAM_25_MEASMNT_DOC-ERDAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MAM_25_MEASMNT_DOC 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_MAM_25_MEASMNT_DOC 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_MAM_25_MEASMNT_DOC INTO WA_MAM_25_MEASMNT_DOC.


*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 MDOCM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MAM_25_MEASMNT_DOC-MDOCM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MAM_25_MEASMNT_DOC-MDOCM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field POINT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MAM_25_MEASMNT_DOC-POINT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MAM_25_MEASMNT_DOC-POINT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field MLANG
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_MAM_25_MEASMNT_DOC-MLANG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MAM_25_MEASMNT_DOC-MLANG.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PRUEFLOS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MAM_25_MEASMNT_DOC-PRUEFLOS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MAM_25_MEASMNT_DOC-PRUEFLOS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ROOTD
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MAM_25_MEASMNT_DOC-ROOTD
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MAM_25_MEASMNT_DOC-ROOTD.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field RECDU
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MAM_25_MEASMNT_DOC-RECDU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MAM_25_MEASMNT_DOC-RECDU.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field CVERS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MAM_25_MEASMNT_DOC-CVERS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MAM_25_MEASMNT_DOC-CVERS.
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_MAM_25_MEASMNT_DOC_STR, 
MDOCM TYPE STRING,
POINT TYPE STRING,
IDATE TYPE STRING,
ITIME TYPE STRING,
INVTS TYPE STRING,
CNTRG TYPE STRING,
MDTXT TYPE STRING,
MLANG TYPE STRING,
KZLTX TYPE STRING,
READR TYPE STRING,
ERDAT TYPE STRING,
ERUHR TYPE STRING,
ERNAM TYPE STRING,
AEDAT TYPE STRING,
AENAM TYPE STRING,
LVORM TYPE STRING,
GENER TYPE STRING,
PRUEFLOS TYPE STRING,
VORGLFNR TYPE STRING,
MERKNR TYPE STRING,
DETAILERG TYPE STRING,
ROOTD TYPE STRING,
TOLTY TYPE STRING,
TOLID TYPE STRING,
WOOBJ TYPE STRING,
DOCAF TYPE STRING,
READG TYPE STRING,
READGI TYPE STRING,
RECDV TYPE STRING,
RECDVI TYPE STRING,
RECDU TYPE STRING,
CNTRR TYPE STRING,
CNTRRI TYPE STRING,
CDIFF TYPE STRING,
CDIFFI TYPE STRING,
IDIFF TYPE STRING,
EXCHG TYPE STRING,
TOTEX TYPE STRING,
CODCT TYPE STRING,
CODGR TYPE STRING,
VLCOD TYPE STRING,
CVERS TYPE STRING,
PREST TYPE STRING,
CANCL TYPE STRING,
WOOB1 TYPE STRING,
PROBENR TYPE STRING,
MBEWERTG TYPE STRING,
ENHANCEMENT_FLAG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MAM_25_MEASMNT_DOC_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_MAM_25_MEASMNT_DOC_STR-MDOCM sy-vline 
WA_MAM_25_MEASMNT_DOC_STR-POINT sy-vline 
WA_MAM_25_MEASMNT_DOC_STR-IDATE sy-vline 
WA_MAM_25_MEASMNT_DOC_STR-ITIME sy-vline 
WA_MAM_25_MEASMNT_DOC_STR-INVTS sy-vline 
WA_MAM_25_MEASMNT_DOC_STR-CNTRG sy-vline 
WA_MAM_25_MEASMNT_DOC_STR-MDTXT sy-vline 
WA_MAM_25_MEASMNT_DOC_STR-MLANG sy-vline 
WA_MAM_25_MEASMNT_DOC_STR-KZLTX sy-vline 
WA_MAM_25_MEASMNT_DOC_STR-READR sy-vline 
WA_MAM_25_MEASMNT_DOC_STR-ERDAT sy-vline 
WA_MAM_25_MEASMNT_DOC_STR-ERUHR sy-vline 
WA_MAM_25_MEASMNT_DOC_STR-ERNAM sy-vline 
WA_MAM_25_MEASMNT_DOC_STR-AEDAT sy-vline 
WA_MAM_25_MEASMNT_DOC_STR-AENAM sy-vline 
WA_MAM_25_MEASMNT_DOC_STR-LVORM sy-vline 
WA_MAM_25_MEASMNT_DOC_STR-GENER sy-vline 
WA_MAM_25_MEASMNT_DOC_STR-PRUEFLOS sy-vline 
WA_MAM_25_MEASMNT_DOC_STR-VORGLFNR sy-vline 
WA_MAM_25_MEASMNT_DOC_STR-MERKNR sy-vline 
WA_MAM_25_MEASMNT_DOC_STR-DETAILERG sy-vline 
WA_MAM_25_MEASMNT_DOC_STR-ROOTD sy-vline 
WA_MAM_25_MEASMNT_DOC_STR-TOLTY sy-vline 
WA_MAM_25_MEASMNT_DOC_STR-TOLID sy-vline 
WA_MAM_25_MEASMNT_DOC_STR-WOOBJ sy-vline 
WA_MAM_25_MEASMNT_DOC_STR-DOCAF sy-vline 
WA_MAM_25_MEASMNT_DOC_STR-READG sy-vline 
WA_MAM_25_MEASMNT_DOC_STR-READGI sy-vline 
WA_MAM_25_MEASMNT_DOC_STR-RECDV sy-vline 
WA_MAM_25_MEASMNT_DOC_STR-RECDVI sy-vline 
WA_MAM_25_MEASMNT_DOC_STR-RECDU sy-vline 
WA_MAM_25_MEASMNT_DOC_STR-CNTRR sy-vline 
WA_MAM_25_MEASMNT_DOC_STR-CNTRRI sy-vline 
WA_MAM_25_MEASMNT_DOC_STR-CDIFF sy-vline 
WA_MAM_25_MEASMNT_DOC_STR-CDIFFI sy-vline 
WA_MAM_25_MEASMNT_DOC_STR-IDIFF sy-vline 
WA_MAM_25_MEASMNT_DOC_STR-EXCHG sy-vline 
WA_MAM_25_MEASMNT_DOC_STR-TOTEX sy-vline 
WA_MAM_25_MEASMNT_DOC_STR-CODCT sy-vline 
WA_MAM_25_MEASMNT_DOC_STR-CODGR sy-vline 
WA_MAM_25_MEASMNT_DOC_STR-VLCOD sy-vline 
WA_MAM_25_MEASMNT_DOC_STR-CVERS sy-vline 
WA_MAM_25_MEASMNT_DOC_STR-PREST sy-vline 
WA_MAM_25_MEASMNT_DOC_STR-CANCL sy-vline 
WA_MAM_25_MEASMNT_DOC_STR-WOOB1 sy-vline 
WA_MAM_25_MEASMNT_DOC_STR-PROBENR sy-vline 
WA_MAM_25_MEASMNT_DOC_STR-MBEWERTG sy-vline 
WA_MAM_25_MEASMNT_DOC_STR-ENHANCEMENT_FLAG sy-vline      INTO ld_text SEPARATED BY SPACE.

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