ABAP Select data from SAP table ICAINV_TRIG into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ICAINV_TRIG
*  INTO TABLE @DATA(IT_ICAINV_TRIG2).
*--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_ICAINV_TRIG INDEX 1 INTO DATA(WA_ICAINV_TRIG2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ICAINV_TRIG>-MANDT = 1.
<ICAINV_TRIG>-CAINVCGSOURCEDOCUMENTCAT = 1.
<ICAINV_TRIG>-CAINVCGSOURCEDOCUMENTNUMBER = 1.
<ICAINV_TRIG>-ALTVCONTRACTACCTFORCOLLVBILLS = 1.
<ICAINV_TRIG>-CAAPPLICATIONAREA = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ICAINV_TRIG-COMPANYCODE, sy-vline,
  WA_ICAINV_TRIG-BUSINESSPLACE, sy-vline,
  WA_ICAINV_TRIG-CAINVCGCORRECTIONCATEGORY, sy-vline,
  WA_ICAINV_TRIG-CAINVCGREQCREATIONDATE, sy-vline,
  WA_ICAINV_TRIG-CAINVCGREQCREATIONUSER, sy-vline,
  WA_ICAINV_TRIG-CAINVCGREQSTARTDATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ICAINV_TRIG 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_ICAINV_TRIG 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_ICAINV_TRIG INTO WA_ICAINV_TRIG.


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

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

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

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

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

*Conversion exit ALPHA, internal->external for field CACONTRACT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ICAINV_TRIG-CACONTRACT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICAINV_TRIG-CACONTRACT.
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_ICAINV_TRIG_STR, 
MANDT TYPE STRING,
CAINVCGSOURCEDOCUMENTCAT TYPE STRING,
CAINVCGSOURCEDOCUMENTNUMBER TYPE STRING,
ALTVCONTRACTACCTFORCOLLVBILLS TYPE STRING,
CAAPPLICATIONAREA TYPE STRING,
COMPANYCODE TYPE STRING,
BUSINESSPLACE TYPE STRING,
CAINVCGCORRECTIONCATEGORY TYPE STRING,
CAINVCGREQCREATIONDATE TYPE STRING,
CAINVCGREQCREATIONUSER TYPE STRING,
CAINVCGREQSTARTDATE TYPE STRING,
CAINVCGREQENDDATE TYPE STRING,
BUSINESSPARTNER TYPE STRING,
CAINVCGCATEGORY TYPE STRING,
CAINVCGBASEDATE TYPE STRING,
CAINVCGFIRSTDATE TYPE STRING,
CAINVCGREQISLOCKEDFORINVOICING TYPE STRING,
LOGICALSYSTEM TYPE STRING,
CAINVCGMASTERDATATYPE TYPE STRING,
CAPARTNERSETTLEMENTRULE TYPE STRING,
CASOURCEDOCUMENTNUMBEROFITEMS TYPE STRING,
CAINVCGCONTROLOFINVOICINGUNIT TYPE STRING,
CAINVCGREQISDOCUMENTSIMULATED TYPE STRING,
DIVISION TYPE STRING,
CAINVCGSOURCEDOCUMENTAMOUNT TYPE STRING,
CASOURCEDOCUMENTCREATIONDATE TYPE STRING,
CAINVCGSOURCEDOCUMENTTYPE TYPE STRING,
CABILLGDOCORIGINPROCESS TYPE STRING,
CASUBAPPLICATION TYPE STRING,
CAINVCGTARGETPROCESS TYPE STRING,
CAINVCGTECHNICALDOCUMENTTYPE TYPE STRING,
CONTRACTACCOUNT TYPE STRING,
CACONTRACT TYPE STRING,
TRANSACTIONCURRENCY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ICAINV_TRIG_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_ICAINV_TRIG_STR-MANDT sy-vline 
WA_ICAINV_TRIG_STR-CAINVCGSOURCEDOCUMENTCAT sy-vline 
WA_ICAINV_TRIG_STR-CAINVCGSOURCEDOCUMENTNUMBER sy-vline 
WA_ICAINV_TRIG_STR-ALTVCONTRACTACCTFORCOLLVBILLS sy-vline 
WA_ICAINV_TRIG_STR-CAAPPLICATIONAREA sy-vline 
WA_ICAINV_TRIG_STR-COMPANYCODE sy-vline 
WA_ICAINV_TRIG_STR-BUSINESSPLACE sy-vline 
WA_ICAINV_TRIG_STR-CAINVCGCORRECTIONCATEGORY sy-vline 
WA_ICAINV_TRIG_STR-CAINVCGREQCREATIONDATE sy-vline 
WA_ICAINV_TRIG_STR-CAINVCGREQCREATIONUSER sy-vline 
WA_ICAINV_TRIG_STR-CAINVCGREQSTARTDATE sy-vline 
WA_ICAINV_TRIG_STR-CAINVCGREQENDDATE sy-vline 
WA_ICAINV_TRIG_STR-BUSINESSPARTNER sy-vline 
WA_ICAINV_TRIG_STR-CAINVCGCATEGORY sy-vline 
WA_ICAINV_TRIG_STR-CAINVCGBASEDATE sy-vline 
WA_ICAINV_TRIG_STR-CAINVCGFIRSTDATE sy-vline 
WA_ICAINV_TRIG_STR-CAINVCGREQISLOCKEDFORINVOICING sy-vline 
WA_ICAINV_TRIG_STR-LOGICALSYSTEM sy-vline 
WA_ICAINV_TRIG_STR-CAINVCGMASTERDATATYPE sy-vline 
WA_ICAINV_TRIG_STR-CAPARTNERSETTLEMENTRULE sy-vline 
WA_ICAINV_TRIG_STR-CASOURCEDOCUMENTNUMBEROFITEMS sy-vline 
WA_ICAINV_TRIG_STR-CAINVCGCONTROLOFINVOICINGUNIT sy-vline 
WA_ICAINV_TRIG_STR-CAINVCGREQISDOCUMENTSIMULATED sy-vline 
WA_ICAINV_TRIG_STR-DIVISION sy-vline 
WA_ICAINV_TRIG_STR-CAINVCGSOURCEDOCUMENTAMOUNT sy-vline 
WA_ICAINV_TRIG_STR-CASOURCEDOCUMENTCREATIONDATE sy-vline 
WA_ICAINV_TRIG_STR-CAINVCGSOURCEDOCUMENTTYPE sy-vline 
WA_ICAINV_TRIG_STR-CABILLGDOCORIGINPROCESS sy-vline 
WA_ICAINV_TRIG_STR-CASUBAPPLICATION sy-vline 
WA_ICAINV_TRIG_STR-CAINVCGTARGETPROCESS sy-vline 
WA_ICAINV_TRIG_STR-CAINVCGTECHNICALDOCUMENTTYPE sy-vline 
WA_ICAINV_TRIG_STR-CONTRACTACCOUNT sy-vline 
WA_ICAINV_TRIG_STR-CACONTRACT sy-vline 
WA_ICAINV_TRIG_STR-TRANSACTIONCURRENCY sy-vline      INTO ld_text SEPARATED BY SPACE.

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