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

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SAPAPO/CTMCUST
*  INTO TABLE @DATA(IT_/SAPAPO/CTMCUST2).
*--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/CTMCUST INDEX 1 INTO DATA(WA_/SAPAPO/CTMCUST2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SAPAPO/CTMCUST>-MANDT = 1.
</SAPAPO/CTMCUST>-DUMMYKEY = 1.
</SAPAPO/CTMCUST>-LATEDEM = 1.
</SAPAPO/CTMCUST>-LATESHIP = 1.
</SAPAPO/CTMCUST>-EARLYSHIPFLG = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SAPAPO/CTMCUST-EARLYSHIP, sy-vline,
  WA_/SAPAPO/CTMCUST-EARLYPROD, sy-vline,
  WA_/SAPAPO/CTMCUST-PARSHIP, sy-vline,
  WA_/SAPAPO/CTMCUST-PARSHIPMIN, sy-vline,
  WA_/SAPAPO/CTMCUST-PARSAT, sy-vline,
  WA_/SAPAPO/CTMCUST-PARSATMIN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SAPAPO/CTMCUST 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/CTMCUST 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/CTMCUST INTO WA_/SAPAPO/CTMCUST.


*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 PARE2, internal->external for field PAREAID
CALL FUNCTION 'CONVERSION_EXIT_PARE2_OUTPUT'
  EXPORTING
    input =                      WA_/SAPAPO/CTMCUST-PAREAID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPAPO/CTMCUST-PAREAID.
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/CTMCUST_STR, 
MANDT TYPE STRING,
DUMMYKEY TYPE STRING,
LATEDEM TYPE STRING,
LATESHIP TYPE STRING,
EARLYSHIPFLG TYPE STRING,
EARLYSHIP TYPE STRING,
EARLYPROD TYPE STRING,
PARSHIP TYPE STRING,
PARSHIPMIN TYPE STRING,
PARSAT TYPE STRING,
PARSATMIN TYPE STRING,
OVERDELIVERY TYPE STRING,
PARSATMAX TYPE STRING,
NUMSHIP TYPE STRING,
SHIPPACK TYPE STRING,
PEGGINGTYPE TYPE STRING,
AGGTIMESUP TYPE STRING,
AGGTIMEDEM TYPE STRING,
LCSCHEDCHECK TYPE STRING,
B_MSGDSP TYPE STRING,
LCPACKSIZE TYPE STRING,
LCPEGREADNO TYPE STRING,
LCPEGGINGSIZE TYPE STRING,
LCRCHANDLE TYPE STRING,
MINOBJQTY TYPE STRING,
MAXSCHEDTIME TYPE STRING,
PARRUN TYPE STRING,
ACTVERSCONF TYPE STRING,
FIXLCRES TYPE STRING,
ENGPACKSIZE TYPE STRING,
WHATBOM TYPE STRING,
PAREAID TYPE STRING,
PPDSCATOVW TYPE STRING,
CAT_PRREQ_PPDS TYPE STRING,
CAT_PRCOP_PPDS TYPE STRING,
CAT_PRRCP_PPDS TYPE STRING,
CAT_TRREQ_PPDS TYPE STRING,
CAT_TRRCP_PPDS TYPE STRING,
CAT_SUREQ_PPDS TYPE STRING,
CAT_SURCP_PPDS TYPE STRING,
CAT_PURCP_PPDS TYPE STRING,
SNPCATOVW TYPE STRING,
CAT_PRREQ_SNP TYPE STRING,
CAT_PRCOP_SNP TYPE STRING,
CAT_PRRCP_SNP TYPE STRING,
CAT_TRREQ_SNP TYPE STRING,
CAT_TRRCP_SNP TYPE STRING,
CAT_SUREQ_SNP TYPE STRING,
CAT_SURCP_SNP TYPE STRING,
CAT_PURCP_SNP TYPE STRING,
SINGLE_CALL_PPDS TYPE STRING,
SINGLE_CALL_SNP TYPE STRING,
DEMSUP_STORE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SAPAPO/CTMCUST_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/CTMCUST_STR-MANDT sy-vline 
WA_/SAPAPO/CTMCUST_STR-DUMMYKEY sy-vline 
WA_/SAPAPO/CTMCUST_STR-LATEDEM sy-vline 
WA_/SAPAPO/CTMCUST_STR-LATESHIP sy-vline 
WA_/SAPAPO/CTMCUST_STR-EARLYSHIPFLG sy-vline 
WA_/SAPAPO/CTMCUST_STR-EARLYSHIP sy-vline 
WA_/SAPAPO/CTMCUST_STR-EARLYPROD sy-vline 
WA_/SAPAPO/CTMCUST_STR-PARSHIP sy-vline 
WA_/SAPAPO/CTMCUST_STR-PARSHIPMIN sy-vline 
WA_/SAPAPO/CTMCUST_STR-PARSAT sy-vline 
WA_/SAPAPO/CTMCUST_STR-PARSATMIN sy-vline 
WA_/SAPAPO/CTMCUST_STR-OVERDELIVERY sy-vline 
WA_/SAPAPO/CTMCUST_STR-PARSATMAX sy-vline 
WA_/SAPAPO/CTMCUST_STR-NUMSHIP sy-vline 
WA_/SAPAPO/CTMCUST_STR-SHIPPACK sy-vline 
WA_/SAPAPO/CTMCUST_STR-PEGGINGTYPE sy-vline 
WA_/SAPAPO/CTMCUST_STR-AGGTIMESUP sy-vline 
WA_/SAPAPO/CTMCUST_STR-AGGTIMEDEM sy-vline 
WA_/SAPAPO/CTMCUST_STR-LCSCHEDCHECK sy-vline 
WA_/SAPAPO/CTMCUST_STR-B_MSGDSP sy-vline 
WA_/SAPAPO/CTMCUST_STR-LCPACKSIZE sy-vline 
WA_/SAPAPO/CTMCUST_STR-LCPEGREADNO sy-vline 
WA_/SAPAPO/CTMCUST_STR-LCPEGGINGSIZE sy-vline 
WA_/SAPAPO/CTMCUST_STR-LCRCHANDLE sy-vline 
WA_/SAPAPO/CTMCUST_STR-MINOBJQTY sy-vline 
WA_/SAPAPO/CTMCUST_STR-MAXSCHEDTIME sy-vline 
WA_/SAPAPO/CTMCUST_STR-PARRUN sy-vline 
WA_/SAPAPO/CTMCUST_STR-ACTVERSCONF sy-vline 
WA_/SAPAPO/CTMCUST_STR-FIXLCRES sy-vline 
WA_/SAPAPO/CTMCUST_STR-ENGPACKSIZE sy-vline 
WA_/SAPAPO/CTMCUST_STR-WHATBOM sy-vline 
WA_/SAPAPO/CTMCUST_STR-PAREAID sy-vline 
WA_/SAPAPO/CTMCUST_STR-PPDSCATOVW sy-vline 
WA_/SAPAPO/CTMCUST_STR-CAT_PRREQ_PPDS sy-vline 
WA_/SAPAPO/CTMCUST_STR-CAT_PRCOP_PPDS sy-vline 
WA_/SAPAPO/CTMCUST_STR-CAT_PRRCP_PPDS sy-vline 
WA_/SAPAPO/CTMCUST_STR-CAT_TRREQ_PPDS sy-vline 
WA_/SAPAPO/CTMCUST_STR-CAT_TRRCP_PPDS sy-vline 
WA_/SAPAPO/CTMCUST_STR-CAT_SUREQ_PPDS sy-vline 
WA_/SAPAPO/CTMCUST_STR-CAT_SURCP_PPDS sy-vline 
WA_/SAPAPO/CTMCUST_STR-CAT_PURCP_PPDS sy-vline 
WA_/SAPAPO/CTMCUST_STR-SNPCATOVW sy-vline 
WA_/SAPAPO/CTMCUST_STR-CAT_PRREQ_SNP sy-vline 
WA_/SAPAPO/CTMCUST_STR-CAT_PRCOP_SNP sy-vline 
WA_/SAPAPO/CTMCUST_STR-CAT_PRRCP_SNP sy-vline 
WA_/SAPAPO/CTMCUST_STR-CAT_TRREQ_SNP sy-vline 
WA_/SAPAPO/CTMCUST_STR-CAT_TRRCP_SNP sy-vline 
WA_/SAPAPO/CTMCUST_STR-CAT_SUREQ_SNP sy-vline 
WA_/SAPAPO/CTMCUST_STR-CAT_SURCP_SNP sy-vline 
WA_/SAPAPO/CTMCUST_STR-CAT_PURCP_SNP sy-vline 
WA_/SAPAPO/CTMCUST_STR-SINGLE_CALL_PPDS sy-vline 
WA_/SAPAPO/CTMCUST_STR-SINGLE_CALL_SNP sy-vline 
WA_/SAPAPO/CTMCUST_STR-DEMSUP_STORE sy-vline      INTO ld_text SEPARATED BY SPACE.

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