ABAP Select data from SAP table IMGENGYCRD into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IMGENGYCRD
*  INTO TABLE @DATA(IT_IMGENGYCRD2).
*--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_IMGENGYCRD INDEX 1 INTO DATA(WA_IMGENGYCRD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IMGENGYCRD>-MANDT = 1.
<IMGENGYCRD>-MICROGENCONTRACT = 1.
<IMGENGYCRD>-MICROGENALLOCATIONDATE = 1.
<IMGENGYCRD>-MICROGENVALIDFROMDATE = 1.
<IMGENGYCRD>-MICROGENTOU = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IMGENGYCRD-MICROGENTRANSACTIONNUMBER, sy-vline,
  WA_IMGENGYCRD-MICROGENCONTRACTREF, sy-vline,
  WA_IMGENGYCRD-MICROGENACTIVITYTYPE, sy-vline,
  WA_IMGENGYCRD-MICROGENVALIDTODATE, sy-vline,
  WA_IMGENGYCRD-MICROGENENERGYCREDITSQUANTITY, sy-vline,
  WA_IMGENGYCRD-MICROGENENERGYCREDITSUNIT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IMGENGYCRD 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_IMGENGYCRD 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_IMGENGYCRD INTO WA_IMGENGYCRD.


*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 MICROGENCONTRACT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IMGENGYCRD-MICROGENCONTRACT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IMGENGYCRD-MICROGENCONTRACT.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ALPHA, internal->external for field MICROGENBILLINGDOC
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IMGENGYCRD-MICROGENBILLINGDOC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IMGENGYCRD-MICROGENBILLINGDOC.
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_IMGENGYCRD_STR, 
MANDT TYPE STRING,
MICROGENCONTRACT TYPE STRING,
MICROGENALLOCATIONDATE TYPE STRING,
MICROGENVALIDFROMDATE TYPE STRING,
MICROGENTOU TYPE STRING,
MICROGENTRANSACTIONNUMBER TYPE STRING,
MICROGENCONTRACTREF TYPE STRING,
MICROGENACTIVITYTYPE TYPE STRING,
MICROGENVALIDTODATE TYPE STRING,
MICROGENENERGYCREDITSQUANTITY TYPE STRING,
MICROGENENERGYCREDITSUNIT TYPE STRING,
MICROGENENERGYCREDITSPRICE TYPE STRING,
MICROGENENGYCREDITSPRICECRCY TYPE STRING,
MICROGENBILLINGDOC TYPE STRING,
MICROGENRVSLTRANSNUMBER TYPE STRING,
MICROGENOBJECTCRTEDBYUSER TYPE STRING,
MICROGENOBJECTCRTEDATDATE TYPE STRING,
MICROGENREMARKSTEXT TYPE STRING,
MICROGENBILLPERIODSTARTDATE TYPE STRING,
MICROGENBILLPERIODENDDATE TYPE STRING,
MICROGENCREDITEXPIRYDATE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IMGENGYCRD_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_IMGENGYCRD_STR-MANDT sy-vline 
WA_IMGENGYCRD_STR-MICROGENCONTRACT sy-vline 
WA_IMGENGYCRD_STR-MICROGENALLOCATIONDATE sy-vline 
WA_IMGENGYCRD_STR-MICROGENVALIDFROMDATE sy-vline 
WA_IMGENGYCRD_STR-MICROGENTOU sy-vline 
WA_IMGENGYCRD_STR-MICROGENTRANSACTIONNUMBER sy-vline 
WA_IMGENGYCRD_STR-MICROGENCONTRACTREF sy-vline 
WA_IMGENGYCRD_STR-MICROGENACTIVITYTYPE sy-vline 
WA_IMGENGYCRD_STR-MICROGENVALIDTODATE sy-vline 
WA_IMGENGYCRD_STR-MICROGENENERGYCREDITSQUANTITY sy-vline 
WA_IMGENGYCRD_STR-MICROGENENERGYCREDITSUNIT sy-vline 
WA_IMGENGYCRD_STR-MICROGENENERGYCREDITSPRICE sy-vline 
WA_IMGENGYCRD_STR-MICROGENENGYCREDITSPRICECRCY sy-vline 
WA_IMGENGYCRD_STR-MICROGENBILLINGDOC sy-vline 
WA_IMGENGYCRD_STR-MICROGENRVSLTRANSNUMBER sy-vline 
WA_IMGENGYCRD_STR-MICROGENOBJECTCRTEDBYUSER sy-vline 
WA_IMGENGYCRD_STR-MICROGENOBJECTCRTEDATDATE sy-vline 
WA_IMGENGYCRD_STR-MICROGENREMARKSTEXT sy-vline 
WA_IMGENGYCRD_STR-MICROGENBILLPERIODSTARTDATE sy-vline 
WA_IMGENGYCRD_STR-MICROGENBILLPERIODENDDATE sy-vline 
WA_IMGENGYCRD_STR-MICROGENCREDITEXPIRYDATE sy-vline      INTO ld_text SEPARATED BY SPACE.

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