ABAP Select data from SAP table CCAINVREV_T into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CCAINVREV_T
*  INTO TABLE @DATA(IT_CCAINVREV_T2).
*--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_CCAINVREV_T INDEX 1 INTO DATA(WA_CCAINVREV_T2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CCAINVREV_T>-MANDT = 1.
<CCAINVREV_T>-CARVSLTSK = 1.
<CCAINVREV_T>-CARVSLTSKSTATUS = 1.
<CCAINVREV_T>-CARVSLTSKCREATIONUSER = 1.
<CCAINVREV_T>-CARVSLTSKCREATIONDATE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CCAINVREV_T-CARVSLTSKHASBLLBLEITM, sy-vline,
  WA_CCAINVREV_T-CARVSLTSKHASBILLGDOC, sy-vline,
  WA_CCAINVREV_T-CARVSLTSKHASINVCGDOC, sy-vline,
  WA_CCAINVREV_T-CARVSLTSKHASRERATING, sy-vline,
  WA_CCAINVREV_T-CARVSLTSKNAME, sy-vline,
  WA_CCAINVREV_T-CARVSLTSKEXTERNALREFERENCE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CCAINVREV_T 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_CCAINVREV_T 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_CCAINVREV_T INTO WA_CCAINVREV_T.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_CCAINVREV_T_STR, 
MANDT TYPE STRING,
CARVSLTSK TYPE STRING,
CARVSLTSKSTATUS TYPE STRING,
CARVSLTSKCREATIONUSER TYPE STRING,
CARVSLTSKCREATIONDATE TYPE STRING,
CARVSLTSKHASBLLBLEITM TYPE STRING,
CARVSLTSKHASBILLGDOC TYPE STRING,
CARVSLTSKHASINVCGDOC TYPE STRING,
CARVSLTSKHASRERATING TYPE STRING,
CARVSLTSKNAME TYPE STRING,
CARVSLTSKEXTERNALREFERENCE TYPE STRING,
CARVSLTSKCREATIONTIME TYPE STRING,
CARVSLTSKCHANGENAME TYPE STRING,
CARVSLTSKCHANGEDATE TYPE STRING,
CARVSLTSKCHANGETIME TYPE STRING,
CARVSLTSKISLOCKED TYPE STRING,
CADELETIONDATE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CCAINVREV_T_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_CCAINVREV_T_STR-MANDT sy-vline 
WA_CCAINVREV_T_STR-CARVSLTSK sy-vline 
WA_CCAINVREV_T_STR-CARVSLTSKSTATUS sy-vline 
WA_CCAINVREV_T_STR-CARVSLTSKCREATIONUSER sy-vline 
WA_CCAINVREV_T_STR-CARVSLTSKCREATIONDATE sy-vline 
WA_CCAINVREV_T_STR-CARVSLTSKHASBLLBLEITM sy-vline 
WA_CCAINVREV_T_STR-CARVSLTSKHASBILLGDOC sy-vline 
WA_CCAINVREV_T_STR-CARVSLTSKHASINVCGDOC sy-vline 
WA_CCAINVREV_T_STR-CARVSLTSKHASRERATING sy-vline 
WA_CCAINVREV_T_STR-CARVSLTSKNAME sy-vline 
WA_CCAINVREV_T_STR-CARVSLTSKEXTERNALREFERENCE sy-vline 
WA_CCAINVREV_T_STR-CARVSLTSKCREATIONTIME sy-vline 
WA_CCAINVREV_T_STR-CARVSLTSKCHANGENAME sy-vline 
WA_CCAINVREV_T_STR-CARVSLTSKCHANGEDATE sy-vline 
WA_CCAINVREV_T_STR-CARVSLTSKCHANGETIME sy-vline 
WA_CCAINVREV_T_STR-CARVSLTSKISLOCKED sy-vline 
WA_CCAINVREV_T_STR-CADELETIONDATE sy-vline      INTO ld_text SEPARATED BY SPACE.

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