ABAP Select data from SAP table CMAC_SC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CMAC_SC
*  INTO TABLE @DATA(IT_CMAC_SC2).
*--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_CMAC_SC INDEX 1 INTO DATA(WA_CMAC_SC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CMAC_SC>-CMSCID = 1.
<CMAC_SC>-CMSCNAME = 1.
<CMAC_SC>-CMPERYR = 1.
<CMAC_SC>-CMPERID = 1.
<CMAC_SC>-CMSCCAT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CMAC_SC-CMENTYEAR, sy-vline,
  WA_CMAC_SC-CMSTAGE, sy-vline,
  WA_CMAC_SC-CMPTIME, sy-vline,
  WA_CMAC_SC-CMSCLENGTH, sy-vline,
  WA_CMAC_SC-CMSCTUNIT, sy-vline,
  WA_CMAC_SC-CMSCREGDAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CMAC_SC 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_CMAC_SC 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_CMAC_SC INTO WA_CMAC_SC.


*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 CMSCCPUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CMAC_SC-CMSCCPUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CMAC_SC-CMSCCPUNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field CMSCMVUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CMAC_SC-CMSCMVUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CMAC_SC-CMSCMVUNIT.
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_CMAC_SC_STR, 
CMSCID TYPE STRING,
CMSCNAME TYPE STRING,
CMPERYR TYPE STRING,
CMPERID TYPE STRING,
CMSCCAT TYPE STRING,
CMENTYEAR TYPE STRING,
CMSTAGE TYPE STRING,
CMPTIME TYPE STRING,
CMSCLENGTH TYPE STRING,
CMSCTUNIT TYPE STRING,
CMSCREGDAT TYPE STRING,
CMSCCAID TYPE STRING,
CMSCREGP1 TYPE STRING,
CMSCREGP2 TYPE STRING,
CMSCWDDAT TYPE STRING,
CMSCWDTYP TYPE STRING,
CMSCDREGP1 TYPE STRING,
CMSCDREGP2 TYPE STRING,
CMSCORG TYPE STRING,
CMSCCOCD TYPE STRING,
CMSCMAIN TYPE STRING,
CMSCDREGR TYPE STRING,
CMREGTYPE TYPE STRING,
CMSCLABSR TYPE STRING,
CMCANCTYPE TYPE STRING,
CMCANCREAN TYPE STRING,
CMCANCDATE TYPE STRING,
CMPERCT TYPE STRING,
CMREPSTAGE TYPE STRING,
CMCPTHD TYPE STRING,
CMSCCPUNIT TYPE STRING,
CMFVALTHD TYPE STRING,
CMSCMVUNIT TYPE STRING,
CMSCKEYDAT TYPE STRING,
CMCHOICE TYPE STRING,
CMCATEG TYPE STRING,
CMSCDDSHED TYPE STRING,
CMPROGCLS TYPE STRING,
CMREGCLS TYPE STRING,
CMSTATUS TYPE STRING,
CMSTATE TYPE STRING,
CMENRCATEG TYPE STRING,
CMPROGCVAR TYPE STRING,
CMACST TYPE STRING,
CMACST_STATUS TYPE STRING,
CMACSTFA TYPE STRING,
CMACSTFA_STATUS TYPE STRING,
CMPRCL TYPE STRING,
CMPRCL_STATUS TYPE STRING,
CMPRCLFA TYPE STRING,
CMPRCLFA_STATUS TYPE STRING,
CMAWARD TYPE STRING,
CMAWARD_STATUS TYPE STRING,
CMCGOBJID TYPE STRING,
CMSCGRPVAR TYPE STRING,
CMCGFEECAT TYPE STRING,
CMCGCATEG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CMAC_SC_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_CMAC_SC_STR-CMSCID sy-vline 
WA_CMAC_SC_STR-CMSCNAME sy-vline 
WA_CMAC_SC_STR-CMPERYR sy-vline 
WA_CMAC_SC_STR-CMPERID sy-vline 
WA_CMAC_SC_STR-CMSCCAT sy-vline 
WA_CMAC_SC_STR-CMENTYEAR sy-vline 
WA_CMAC_SC_STR-CMSTAGE sy-vline 
WA_CMAC_SC_STR-CMPTIME sy-vline 
WA_CMAC_SC_STR-CMSCLENGTH sy-vline 
WA_CMAC_SC_STR-CMSCTUNIT sy-vline 
WA_CMAC_SC_STR-CMSCREGDAT sy-vline 
WA_CMAC_SC_STR-CMSCCAID sy-vline 
WA_CMAC_SC_STR-CMSCREGP1 sy-vline 
WA_CMAC_SC_STR-CMSCREGP2 sy-vline 
WA_CMAC_SC_STR-CMSCWDDAT sy-vline 
WA_CMAC_SC_STR-CMSCWDTYP sy-vline 
WA_CMAC_SC_STR-CMSCDREGP1 sy-vline 
WA_CMAC_SC_STR-CMSCDREGP2 sy-vline 
WA_CMAC_SC_STR-CMSCORG sy-vline 
WA_CMAC_SC_STR-CMSCCOCD sy-vline 
WA_CMAC_SC_STR-CMSCMAIN sy-vline 
WA_CMAC_SC_STR-CMSCDREGR sy-vline 
WA_CMAC_SC_STR-CMREGTYPE sy-vline 
WA_CMAC_SC_STR-CMSCLABSR sy-vline 
WA_CMAC_SC_STR-CMCANCTYPE sy-vline 
WA_CMAC_SC_STR-CMCANCREAN sy-vline 
WA_CMAC_SC_STR-CMCANCDATE sy-vline 
WA_CMAC_SC_STR-CMPERCT sy-vline 
WA_CMAC_SC_STR-CMREPSTAGE sy-vline 
WA_CMAC_SC_STR-CMCPTHD sy-vline 
WA_CMAC_SC_STR-CMSCCPUNIT sy-vline 
WA_CMAC_SC_STR-CMFVALTHD sy-vline 
WA_CMAC_SC_STR-CMSCMVUNIT sy-vline 
WA_CMAC_SC_STR-CMSCKEYDAT sy-vline 
WA_CMAC_SC_STR-CMCHOICE sy-vline 
WA_CMAC_SC_STR-CMCATEG sy-vline 
WA_CMAC_SC_STR-CMSCDDSHED sy-vline 
WA_CMAC_SC_STR-CMPROGCLS sy-vline 
WA_CMAC_SC_STR-CMREGCLS sy-vline 
WA_CMAC_SC_STR-CMSTATUS sy-vline 
WA_CMAC_SC_STR-CMSTATE sy-vline 
WA_CMAC_SC_STR-CMENRCATEG sy-vline 
WA_CMAC_SC_STR-CMPROGCVAR sy-vline 
WA_CMAC_SC_STR-CMACST sy-vline 
WA_CMAC_SC_STR-CMACST_STATUS sy-vline 
WA_CMAC_SC_STR-CMACSTFA sy-vline 
WA_CMAC_SC_STR-CMACSTFA_STATUS sy-vline 
WA_CMAC_SC_STR-CMPRCL sy-vline 
WA_CMAC_SC_STR-CMPRCL_STATUS sy-vline 
WA_CMAC_SC_STR-CMPRCLFA sy-vline 
WA_CMAC_SC_STR-CMPRCLFA_STATUS sy-vline 
WA_CMAC_SC_STR-CMAWARD sy-vline 
WA_CMAC_SC_STR-CMAWARD_STATUS sy-vline 
WA_CMAC_SC_STR-CMCGOBJID sy-vline 
WA_CMAC_SC_STR-CMSCGRPVAR sy-vline 
WA_CMAC_SC_STR-CMCGFEECAT sy-vline 
WA_CMAC_SC_STR-CMCGCATEG sy-vline      INTO ld_text SEPARATED BY SPACE.

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