ABAP Select data from SAP table ACEV_ACDOCAMIG into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ACEV_ACDOCAMIG
*  INTO TABLE @DATA(IT_ACEV_ACDOCAMIG2).
*--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_ACEV_ACDOCAMIG INDEX 1 INTO DATA(WA_ACEV_ACDOCAMIG2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ACEV_ACDOCAMIG>-MANDT = 1.
<ACEV_ACDOCAMIG>-COMP = 1.
<ACEV_ACDOCAMIG>-BUKRS = 1.
<ACEV_ACDOCAMIG>-GJAHR = 1.
<ACEV_ACDOCAMIG>-OBJID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ACEV_ACDOCAMIG-SUBID, sy-vline,
  WA_ACEV_ACDOCAMIG-ACRTYPE, sy-vline,
  WA_ACEV_ACDOCAMIG-ACCRULE, sy-vline,
  WA_ACEV_ACDOCAMIG-DOCNR, sy-vline,
  WA_ACEV_ACDOCAMIG-PRE_GJAHR, sy-vline,
  WA_ACEV_ACDOCAMIG-ACROBJ_ID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ACEV_ACDOCAMIG 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_ACEV_ACDOCAMIG 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_ACEV_ACDOCAMIG INTO WA_ACEV_ACDOCAMIG.


*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 GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_ACEV_ACDOCAMIG-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ACEV_ACDOCAMIG-GJAHR.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit GJAHR, internal->external for field POYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_ACEV_ACDOCAMIG-POYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ACEV_ACDOCAMIG-POYEAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AWSYS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ACEV_ACDOCAMIG-AWSYS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ACEV_ACDOCAMIG-AWSYS.
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_ACEV_ACDOCAMIG_STR, 
MANDT TYPE STRING,
COMP TYPE STRING,
BUKRS TYPE STRING,
GJAHR TYPE STRING,
OBJID TYPE STRING,
SUBID TYPE STRING,
ACRTYPE TYPE STRING,
ACCRULE TYPE STRING,
DOCNR TYPE STRING,
PRE_GJAHR TYPE STRING,
ACROBJ_ID TYPE STRING,
ACRSOBJ_ID TYPE STRING,
ACRITMTYPE TYPE STRING,
SLALITTYPE TYPE STRING,
VALTBP TYPE STRING,
CURRENCY TYPE STRING,
TRANSTYPE TYPE STRING,
EFFDATE TYPE STRING,
PODATE TYPE STRING,
POPER TYPE STRING,
POYEAR TYPE STRING,
AWTYP TYPE STRING,
AWKEY TYPE STRING,
AWSYS TYPE STRING,
TIMESTAMP TYPE STRING,
MIG_SOURCE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ACEV_ACDOCAMIG_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_ACEV_ACDOCAMIG_STR-MANDT sy-vline 
WA_ACEV_ACDOCAMIG_STR-COMP sy-vline 
WA_ACEV_ACDOCAMIG_STR-BUKRS sy-vline 
WA_ACEV_ACDOCAMIG_STR-GJAHR sy-vline 
WA_ACEV_ACDOCAMIG_STR-OBJID sy-vline 
WA_ACEV_ACDOCAMIG_STR-SUBID sy-vline 
WA_ACEV_ACDOCAMIG_STR-ACRTYPE sy-vline 
WA_ACEV_ACDOCAMIG_STR-ACCRULE sy-vline 
WA_ACEV_ACDOCAMIG_STR-DOCNR sy-vline 
WA_ACEV_ACDOCAMIG_STR-PRE_GJAHR sy-vline 
WA_ACEV_ACDOCAMIG_STR-ACROBJ_ID sy-vline 
WA_ACEV_ACDOCAMIG_STR-ACRSOBJ_ID sy-vline 
WA_ACEV_ACDOCAMIG_STR-ACRITMTYPE sy-vline 
WA_ACEV_ACDOCAMIG_STR-SLALITTYPE sy-vline 
WA_ACEV_ACDOCAMIG_STR-VALTBP sy-vline 
WA_ACEV_ACDOCAMIG_STR-CURRENCY sy-vline 
WA_ACEV_ACDOCAMIG_STR-TRANSTYPE sy-vline 
WA_ACEV_ACDOCAMIG_STR-EFFDATE sy-vline 
WA_ACEV_ACDOCAMIG_STR-PODATE sy-vline 
WA_ACEV_ACDOCAMIG_STR-POPER sy-vline 
WA_ACEV_ACDOCAMIG_STR-POYEAR sy-vline 
WA_ACEV_ACDOCAMIG_STR-AWTYP sy-vline 
WA_ACEV_ACDOCAMIG_STR-AWKEY sy-vline 
WA_ACEV_ACDOCAMIG_STR-AWSYS sy-vline 
WA_ACEV_ACDOCAMIG_STR-TIMESTAMP sy-vline 
WA_ACEV_ACDOCAMIG_STR-MIG_SOURCE sy-vline      INTO ld_text SEPARATED BY SPACE.

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