ABAP Select data from SAP table TCMAC_SM into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TCMAC_SM
*  INTO TABLE @DATA(IT_TCMAC_SM2).
*--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_TCMAC_SM INDEX 1 INTO DATA(WA_TCMAC_SM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TCMAC_SM>-MANDT = 1.
<TCMAC_SM>-CMSTID = 1.
<TCMAC_SM>-CMPERSL = 1.
<TCMAC_SM>-CMSMID = 1.
<TCMAC_SM>-CMPERYR = 1.

ENDLOOP.

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

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


*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_TCMAC_SM-CMCPUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TCMAC_SM-CMCPUNIT.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit CUNIT, internal->external for field CMMVUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_TCMAC_SM-CMMVUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TCMAC_SM-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_TCMAC_SM_STR, 
MANDT TYPE STRING,
CMSTID TYPE STRING,
CMPERSL TYPE STRING,
CMSMID 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_TCMAC_SM_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_TCMAC_SM_STR-MANDT sy-vline 
WA_TCMAC_SM_STR-CMSTID sy-vline 
WA_TCMAC_SM_STR-CMPERSL sy-vline 
WA_TCMAC_SM_STR-CMSMID sy-vline 
WA_TCMAC_SM_STR-CMPERYR sy-vline 
WA_TCMAC_SM_STR-CMPERID sy-vline 
WA_TCMAC_SM_STR-CMSMCAT sy-vline 
WA_TCMAC_SM_STR-CMLEVCAT sy-vline 
WA_TCMAC_SM_STR-CMCRHRS sy-vline 
WA_TCMAC_SM_STR-CMCPUNIT sy-vline 
WA_TCMAC_SM_STR-CMOUTPROG sy-vline 
WA_TCMAC_SM_STR-CMSMSTATS sy-vline 
WA_TCMAC_SM_STR-CMSMREGDAT sy-vline 
WA_TCMAC_SM_STR-CMSMREGREA sy-vline 
WA_TCMAC_SM_STR-CMSMCAID sy-vline 
WA_TCMAC_SM_STR-CMSMREGP1 sy-vline 
WA_TCMAC_SM_STR-CMSMREGP2 sy-vline 
WA_TCMAC_SM_STR-CMSMWDDATE sy-vline 
WA_TCMAC_SM_STR-CMSMWDREA sy-vline 
WA_TCMAC_SM_STR-CMSMDREGP1 sy-vline 
WA_TCMAC_SM_STR-CMSMDREGP2 sy-vline 
WA_TCMAC_SM_STR-CMSMCPTEMP sy-vline 
WA_TCMAC_SM_STR-CMSMCPUNIT sy-vline 
WA_TCMAC_SM_STR-CMSMEXMPT sy-vline 
WA_TCMAC_SM_STR-CMSMTRANSF sy-vline 
WA_TCMAC_SM_STR-CMSMRATING sy-vline 
WA_TCMAC_SM_STR-CMSMSCALID sy-vline 
WA_TCMAC_SM_STR-CMSMVALUE sy-vline 
WA_TCMAC_SM_STR-CMMVUNIT sy-vline 
WA_TCMAC_SM_STR-CMSMORG sy-vline 
WA_TCMAC_SM_STR-CMSMCOCD sy-vline 
WA_TCMAC_SM_STR-CMREFTYPE sy-vline 
WA_TCMAC_SM_STR-CMSMKEYDAT sy-vline 
WA_TCMAC_SM_STR-CMSEOBJID sy-vline 
WA_TCMAC_SM_STR-CMSMSECAT1 sy-vline 
WA_TCMAC_SM_STR-CMSMDDSHED sy-vline 
WA_TCMAC_SM_STR-CMSEDDSHED sy-vline 
WA_TCMAC_SM_STR-CMSMCAMPUS sy-vline 
WA_TCMAC_SM_STR-CMSMDELMOD sy-vline 
WA_TCMAC_SM_STR-CMPROGCVAR sy-vline 
WA_TCMAC_SM_STR-CMMULTPROGCVAR sy-vline 
WA_TCMAC_SM_STR-CMSMWAITLIST sy-vline 
WA_TCMAC_SM_STR-CMCRHMIN sy-vline 
WA_TCMAC_SM_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.