ABAP Select data from SAP table CMACDB_FEESM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CMACDB_FEESM
*  INTO TABLE @DATA(IT_CMACDB_FEESM2).
*--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_CMACDB_FEESM INDEX 1 INTO DATA(WA_CMACDB_FEESM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CMACDB_FEESM>-MANDT = 1.
<CMACDB_FEESM>-DOCNR = 1.
<CMACDB_FEESM>-ITEMNR = 1.
<CMACDB_FEESM>-CMSMID = 1.
<CMACDB_FEESM>-CMSMNAME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CMACDB_FEESM-CMPERYR, sy-vline,
  WA_CMACDB_FEESM-CMPERID, sy-vline,
  WA_CMACDB_FEESM-CMSMCAT, sy-vline,
  WA_CMACDB_FEESM-CMLEVCAT, sy-vline,
  WA_CMACDB_FEESM-CMCRHRS, sy-vline,
  WA_CMACDB_FEESM-CMCPUNIT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CMACDB_FEESM 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_CMACDB_FEESM 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_CMACDB_FEESM INTO WA_CMACDB_FEESM.


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

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

*Conversion exit CUNIT, internal->external for field CMMVUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CMACDB_FEESM-CMMVUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CMACDB_FEESM-CMMVUNIT.
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_CMACDB_FEESM_STR, 
MANDT TYPE STRING,
DOCNR TYPE STRING,
ITEMNR TYPE STRING,
CMSMID TYPE STRING,
CMSMNAME TYPE STRING,
CMPERYR TYPE STRING,
CMPERID TYPE STRING,
CMSMCAT TYPE STRING,
CMLEVCAT TYPE STRING,
CMCRHRS TYPE STRING,
CMCPUNIT TYPE STRING,
CMOUTPROG TYPE STRING,
CMSMSTATS TYPE STRING,
CMSMREGDAT TYPE STRING,
CMSMREGREA TYPE STRING,
CMSMCAID TYPE STRING,
CMSMREGP1 TYPE STRING,
CMSMREGP2 TYPE STRING,
CMSMWDDATE TYPE STRING,
CMSMWDREA TYPE STRING,
CMSMDREGP1 TYPE STRING,
CMSMDREGP2 TYPE STRING,
CMSMCPTEMP TYPE STRING,
CMSMCPUNIT TYPE STRING,
CMSMEXMPT TYPE STRING,
CMSMTRANSF TYPE STRING,
CMSMRATING TYPE STRING,
CMSMSCALID TYPE STRING,
CMSMVALUE TYPE STRING,
CMMVUNIT TYPE STRING,
CMSMORG TYPE STRING,
CMSMCOCD TYPE STRING,
CMREFTYPE TYPE STRING,
CMSMKEYDAT TYPE STRING,
CMSEOBJID TYPE STRING,
CMSMSECAT1 TYPE STRING,
CMSMDDSHED TYPE STRING,
CMSEDDSHED TYPE STRING,
CMSMCAMPUS TYPE STRING,
CMSMDELMOD TYPE STRING,
CMPROGCVAR TYPE STRING,
CMMULTPROGCVAR TYPE STRING,
CMSMWAITLIST TYPE STRING,
CMCRHMIN TYPE STRING,
CMCRHMAX TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CMACDB_FEESM_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_CMACDB_FEESM_STR-MANDT sy-vline 
WA_CMACDB_FEESM_STR-DOCNR sy-vline 
WA_CMACDB_FEESM_STR-ITEMNR sy-vline 
WA_CMACDB_FEESM_STR-CMSMID sy-vline 
WA_CMACDB_FEESM_STR-CMSMNAME sy-vline 
WA_CMACDB_FEESM_STR-CMPERYR sy-vline 
WA_CMACDB_FEESM_STR-CMPERID sy-vline 
WA_CMACDB_FEESM_STR-CMSMCAT sy-vline 
WA_CMACDB_FEESM_STR-CMLEVCAT sy-vline 
WA_CMACDB_FEESM_STR-CMCRHRS sy-vline 
WA_CMACDB_FEESM_STR-CMCPUNIT sy-vline 
WA_CMACDB_FEESM_STR-CMOUTPROG sy-vline 
WA_CMACDB_FEESM_STR-CMSMSTATS sy-vline 
WA_CMACDB_FEESM_STR-CMSMREGDAT sy-vline 
WA_CMACDB_FEESM_STR-CMSMREGREA sy-vline 
WA_CMACDB_FEESM_STR-CMSMCAID sy-vline 
WA_CMACDB_FEESM_STR-CMSMREGP1 sy-vline 
WA_CMACDB_FEESM_STR-CMSMREGP2 sy-vline 
WA_CMACDB_FEESM_STR-CMSMWDDATE sy-vline 
WA_CMACDB_FEESM_STR-CMSMWDREA sy-vline 
WA_CMACDB_FEESM_STR-CMSMDREGP1 sy-vline 
WA_CMACDB_FEESM_STR-CMSMDREGP2 sy-vline 
WA_CMACDB_FEESM_STR-CMSMCPTEMP sy-vline 
WA_CMACDB_FEESM_STR-CMSMCPUNIT sy-vline 
WA_CMACDB_FEESM_STR-CMSMEXMPT sy-vline 
WA_CMACDB_FEESM_STR-CMSMTRANSF sy-vline 
WA_CMACDB_FEESM_STR-CMSMRATING sy-vline 
WA_CMACDB_FEESM_STR-CMSMSCALID sy-vline 
WA_CMACDB_FEESM_STR-CMSMVALUE sy-vline 
WA_CMACDB_FEESM_STR-CMMVUNIT sy-vline 
WA_CMACDB_FEESM_STR-CMSMORG sy-vline 
WA_CMACDB_FEESM_STR-CMSMCOCD sy-vline 
WA_CMACDB_FEESM_STR-CMREFTYPE sy-vline 
WA_CMACDB_FEESM_STR-CMSMKEYDAT sy-vline 
WA_CMACDB_FEESM_STR-CMSEOBJID sy-vline 
WA_CMACDB_FEESM_STR-CMSMSECAT1 sy-vline 
WA_CMACDB_FEESM_STR-CMSMDDSHED sy-vline 
WA_CMACDB_FEESM_STR-CMSEDDSHED sy-vline 
WA_CMACDB_FEESM_STR-CMSMCAMPUS sy-vline 
WA_CMACDB_FEESM_STR-CMSMDELMOD sy-vline 
WA_CMACDB_FEESM_STR-CMPROGCVAR sy-vline 
WA_CMACDB_FEESM_STR-CMMULTPROGCVAR sy-vline 
WA_CMACDB_FEESM_STR-CMSMWAITLIST sy-vline 
WA_CMACDB_FEESM_STR-CMCRHMIN sy-vline 
WA_CMACDB_FEESM_STR-CMCRHMAX sy-vline      INTO ld_text SEPARATED BY SPACE.

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