ABAP Select data from SAP table MWC_CA_SUMMARY_S into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MWC_CA_SUMMARY_S
*  INTO TABLE @DATA(IT_MWC_CA_SUMMARY_S2).
*--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_MWC_CA_SUMMARY_S INDEX 1 INTO DATA(WA_MWC_CA_SUMMARY_S2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MWC_CA_SUMMARY_S>-PARTNER = 1.
<MWC_CA_SUMMARY_S>-CONTRACT_ACCOUNT = 1.
<MWC_CA_SUMMARY_S>-CONTRACC_NAME = 1.
<MWC_CA_SUMMARY_S>-PREMISE_ID = 1.
<MWC_CA_SUMMARY_S>-ADDR_SHORT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MWC_CA_SUMMARY_S-AUTO_PAY, sy-vline,
  WA_MWC_CA_SUMMARY_S-PAYDUE_TSTMP, sy-vline,
  WA_MWC_CA_SUMMARY_S-DUE_DATE_PAST, sy-vline,
  WA_MWC_CA_SUMMARY_S-AMOUNT_DUE, sy-vline,
  WA_MWC_CA_SUMMARY_S-CURRENCY, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_MWC_CA_SUMMARY_S 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_MWC_CA_SUMMARY_S 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_MWC_CA_SUMMARY_S INTO WA_MWC_CA_SUMMARY_S.


*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 ALPHA, internal->external for field PARTNER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MWC_CA_SUMMARY_S-PARTNER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MWC_CA_SUMMARY_S-PARTNER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field CONTRACT_ACCOUNT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MWC_CA_SUMMARY_S-CONTRACT_ACCOUNT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MWC_CA_SUMMARY_S-CONTRACT_ACCOUNT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PREMISE_ID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MWC_CA_SUMMARY_S-PREMISE_ID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MWC_CA_SUMMARY_S-PREMISE_ID.
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_MWC_CA_SUMMARY_S_STR, 
PARTNER TYPE STRING,
CONTRACT_ACCOUNT TYPE STRING,
CONTRACC_NAME TYPE STRING,
PREMISE_ID TYPE STRING,
ADDR_SHORT TYPE STRING,
AUTO_PAY TYPE STRING,
PAYDUE_TSTMP TYPE STRING,
DUE_DATE_PAST TYPE STRING,
AMOUNT_DUE TYPE STRING,
CURRENCY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MWC_CA_SUMMARY_S_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_MWC_CA_SUMMARY_S_STR-PARTNER sy-vline 
WA_MWC_CA_SUMMARY_S_STR-CONTRACT_ACCOUNT sy-vline 
WA_MWC_CA_SUMMARY_S_STR-CONTRACC_NAME sy-vline 
WA_MWC_CA_SUMMARY_S_STR-PREMISE_ID sy-vline 
WA_MWC_CA_SUMMARY_S_STR-ADDR_SHORT sy-vline 
WA_MWC_CA_SUMMARY_S_STR-AUTO_PAY sy-vline 
WA_MWC_CA_SUMMARY_S_STR-PAYDUE_TSTMP sy-vline 
WA_MWC_CA_SUMMARY_S_STR-DUE_DATE_PAST sy-vline 
WA_MWC_CA_SUMMARY_S_STR-AMOUNT_DUE sy-vline 
WA_MWC_CA_SUMMARY_S_STR-CURRENCY sy-vline      INTO ld_text SEPARATED BY SPACE.

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