ABAP Select data from SAP table /SAPAPO/SMC01M into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /SAPAPO/SMC01M 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 /SAPAPO/SMC01M. 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 /SAPAPO/SMC01M 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_/SAPAPO/SMC01M TYPE STANDARD TABLE OF /SAPAPO/SMC01M,
      WA_/SAPAPO/SMC01M TYPE /SAPAPO/SMC01M,
      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: </SAPAPO/SMC01M> TYPE /SAPAPO/SMC01M.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_/SAPAPO/SMC01M.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /SAPAPO/SMC01M
  INTO TABLE IT_/SAPAPO/SMC01M.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SAPAPO/SMC01M
*  INTO TABLE @DATA(IT_/SAPAPO/SMC01M2).
*--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_/SAPAPO/SMC01M INDEX 1 INTO DATA(WA_/SAPAPO/SMC01M2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/SAPAPO/SMC01M ASSIGNING </SAPAPO/SMC01M>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SAPAPO/SMC01M>-CLASS_ID = 1.
</SAPAPO/SMC01M>-CHAR_ID = 1.
</SAPAPO/SMC01M>-FLG_DESCR_ONLY = 1.
</SAPAPO/SMC01M>-CHAR_POS = 1.
</SAPAPO/SMC01M>-RAWBLK_CNT = 1.

ENDLOOP.

LOOP AT IT_/SAPAPO/SMC01M INTO WA_/SAPAPO/SMC01M.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SAPAPO/SMC01M-FLD_OFFSET, sy-vline,
  WA_/SAPAPO/SMC01M-FLD_LENGTH, sy-vline,
  WA_/SAPAPO/SMC01M-FLG_REQRD, sy-vline,
  WA_/SAPAPO/SMC01M-FLG_TIMDEP, sy-vline,
  WA_/SAPAPO/SMC01M-CHAR_NAME, sy-vline,
  WA_/SAPAPO/SMC01M-CHAR_TYPE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SAPAPO/SMC01M 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_/SAPAPO/SMC01M 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_/SAPAPO/SMC01M INTO WA_/SAPAPO/SMC01M.


*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 MC01K, internal->external for field CLASS_ID
CALL FUNCTION 'CONVERSION_EXIT_MC01K_OUTPUT'
  EXPORTING
    input =                      WA_/SAPAPO/SMC01M-CLASS_ID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPAPO/SMC01M-CLASS_ID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MC01C, internal->external for field CHAR_ID
CALL FUNCTION 'CONVERSION_EXIT_MC01C_OUTPUT'
  EXPORTING
    input =                      WA_/SAPAPO/SMC01M-CHAR_ID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPAPO/SMC01M-CHAR_ID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field BASE_UNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/SAPAPO/SMC01M-BASE_UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPAPO/SMC01M-BASE_UNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit DTYPE, internal->external for field DATATYPE
CALL FUNCTION 'CONVERSION_EXIT_DTYPE_OUTPUT'
  EXPORTING
    input =                      WA_/SAPAPO/SMC01M-DATATYPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPAPO/SMC01M-DATATYPE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field SPRAS
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_/SAPAPO/SMC01M-SPRAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPAPO/SMC01M-SPRAS.
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_/SAPAPO/SMC01M_STR, 
CLASS_ID TYPE STRING,
CHAR_ID TYPE STRING,
FLG_DESCR_ONLY TYPE STRING,
CHAR_POS TYPE STRING,
RAWBLK_CNT TYPE STRING,
FLD_OFFSET TYPE STRING,
FLD_LENGTH TYPE STRING,
FLG_REQRD TYPE STRING,
FLG_TIMDEP TYPE STRING,
CHAR_NAME TYPE STRING,
CHAR_TYPE TYPE STRING,
FLG_QFIELD TYPE STRING,
CHAR_STAT TYPE STRING,
DEF_KIND TYPE STRING,
REF_STRUC TYPE STRING,
REF_FIELD TYPE STRING,
BASE_UNIT TYPE STRING,
TABNAME TYPE STRING,
FIELDNAME TYPE STRING,
AS4LOCAL TYPE STRING,
AS4VERS TYPE STRING,
POSITION TYPE STRING,
KEYFLAG TYPE STRING,
MANDATORY TYPE STRING,
ROLLNAME TYPE STRING,
CHECKTABLE TYPE STRING,
ADMINFIELD TYPE STRING,
INTTYPE TYPE STRING,
INTLEN TYPE STRING,
REFTABLE TYPE STRING,
PRECFIELD TYPE STRING,
REFFIELD TYPE STRING,
CONROUT TYPE STRING,
NOTNULL TYPE STRING,
DATATYPE TYPE STRING,
LENG TYPE STRING,
DECIMALS TYPE STRING,
DOMNAME TYPE STRING,
SHLPORIGIN TYPE STRING,
TABLETYPE TYPE STRING,
DEPTH TYPE STRING,
COMPTYPE TYPE STRING,
REFTYPE TYPE STRING,
LANGUFLAG TYPE STRING,
DBPOSITION TYPE STRING,
ANONYMOUS TYPE STRING,
OUTPUTSTYLE TYPE STRING,
SRS_ID TYPE STRING,
VALUE_HELP TYPE STRING,
CONVEXIT TYPE STRING,
B_VAL_CHECK TYPE STRING,
LOWERCASE TYPE STRING,
OUTPUTLEN TYPE STRING,
SPRAS TYPE STRING,
CHAR_DESCR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SAPAPO/SMC01M_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_/SAPAPO/SMC01M_STR-CLASS_ID sy-vline 
WA_/SAPAPO/SMC01M_STR-CHAR_ID sy-vline 
WA_/SAPAPO/SMC01M_STR-FLG_DESCR_ONLY sy-vline 
WA_/SAPAPO/SMC01M_STR-CHAR_POS sy-vline 
WA_/SAPAPO/SMC01M_STR-RAWBLK_CNT sy-vline 
WA_/SAPAPO/SMC01M_STR-FLD_OFFSET sy-vline 
WA_/SAPAPO/SMC01M_STR-FLD_LENGTH sy-vline 
WA_/SAPAPO/SMC01M_STR-FLG_REQRD sy-vline 
WA_/SAPAPO/SMC01M_STR-FLG_TIMDEP sy-vline 
WA_/SAPAPO/SMC01M_STR-CHAR_NAME sy-vline 
WA_/SAPAPO/SMC01M_STR-CHAR_TYPE sy-vline 
WA_/SAPAPO/SMC01M_STR-FLG_QFIELD sy-vline 
WA_/SAPAPO/SMC01M_STR-CHAR_STAT sy-vline 
WA_/SAPAPO/SMC01M_STR-DEF_KIND sy-vline 
WA_/SAPAPO/SMC01M_STR-REF_STRUC sy-vline 
WA_/SAPAPO/SMC01M_STR-REF_FIELD sy-vline 
WA_/SAPAPO/SMC01M_STR-BASE_UNIT sy-vline 
WA_/SAPAPO/SMC01M_STR-TABNAME sy-vline 
WA_/SAPAPO/SMC01M_STR-FIELDNAME sy-vline 
WA_/SAPAPO/SMC01M_STR-AS4LOCAL sy-vline 
WA_/SAPAPO/SMC01M_STR-AS4VERS sy-vline 
WA_/SAPAPO/SMC01M_STR-POSITION sy-vline 
WA_/SAPAPO/SMC01M_STR-KEYFLAG sy-vline 
WA_/SAPAPO/SMC01M_STR-MANDATORY sy-vline 
WA_/SAPAPO/SMC01M_STR-ROLLNAME sy-vline 
WA_/SAPAPO/SMC01M_STR-CHECKTABLE sy-vline 
WA_/SAPAPO/SMC01M_STR-ADMINFIELD sy-vline 
WA_/SAPAPO/SMC01M_STR-INTTYPE sy-vline 
WA_/SAPAPO/SMC01M_STR-INTLEN sy-vline 
WA_/SAPAPO/SMC01M_STR-REFTABLE sy-vline 
WA_/SAPAPO/SMC01M_STR-PRECFIELD sy-vline 
WA_/SAPAPO/SMC01M_STR-REFFIELD sy-vline 
WA_/SAPAPO/SMC01M_STR-CONROUT sy-vline 
WA_/SAPAPO/SMC01M_STR-NOTNULL sy-vline 
WA_/SAPAPO/SMC01M_STR-DATATYPE sy-vline 
WA_/SAPAPO/SMC01M_STR-LENG sy-vline 
WA_/SAPAPO/SMC01M_STR-DECIMALS sy-vline 
WA_/SAPAPO/SMC01M_STR-DOMNAME sy-vline 
WA_/SAPAPO/SMC01M_STR-SHLPORIGIN sy-vline 
WA_/SAPAPO/SMC01M_STR-TABLETYPE sy-vline 
WA_/SAPAPO/SMC01M_STR-DEPTH sy-vline 
WA_/SAPAPO/SMC01M_STR-COMPTYPE sy-vline 
WA_/SAPAPO/SMC01M_STR-REFTYPE sy-vline 
WA_/SAPAPO/SMC01M_STR-LANGUFLAG sy-vline 
WA_/SAPAPO/SMC01M_STR-DBPOSITION sy-vline 
WA_/SAPAPO/SMC01M_STR-ANONYMOUS sy-vline 
WA_/SAPAPO/SMC01M_STR-OUTPUTSTYLE sy-vline 
WA_/SAPAPO/SMC01M_STR-SRS_ID sy-vline 
WA_/SAPAPO/SMC01M_STR-VALUE_HELP sy-vline 
WA_/SAPAPO/SMC01M_STR-CONVEXIT sy-vline 
WA_/SAPAPO/SMC01M_STR-B_VAL_CHECK sy-vline 
WA_/SAPAPO/SMC01M_STR-LOWERCASE sy-vline 
WA_/SAPAPO/SMC01M_STR-OUTPUTLEN sy-vline 
WA_/SAPAPO/SMC01M_STR-SPRAS sy-vline 
WA_/SAPAPO/SMC01M_STR-CHAR_DESCR sy-vline      INTO ld_text SEPARATED BY SPACE.

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