ABAP Select data from SAP table TIVCAEC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TIVCAEC
*  INTO TABLE @DATA(IT_TIVCAEC2).
*--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_TIVCAEC INDEX 1 INTO DATA(WA_TIVCAEC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TIVCAEC>-TABNAME = 1.
<TIVCAEC>-FIELDNAME = 1.
<TIVCAEC>-DESCRIPTION = 1.
<TIVCAEC>-ECSTATUS = 1.
<TIVCAEC>-PROGNAME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TIVCAEC-FORM, sy-vline,
  WA_TIVCAEC-ROLLNAME, sy-vline,
  WA_TIVCAEC-DOMNAME, sy-vline,
  WA_TIVCAEC-DATATYPE, sy-vline,
  WA_TIVCAEC-DEVCLASS, sy-vline,
  WA_TIVCAEC-TABISREF, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TIVCAEC 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_TIVCAEC 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_TIVCAEC INTO WA_TIVCAEC.


*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 DTYPE, internal->external for field DATATYPE
CALL FUNCTION 'CONVERSION_EXIT_DTYPE_OUTPUT'
  EXPORTING
    input =                      WA_TIVCAEC-DATATYPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TIVCAEC-DATATYPE.
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_TIVCAEC_STR, 
TABNAME TYPE STRING,
FIELDNAME TYPE STRING,
DESCRIPTION TYPE STRING,
ECSTATUS TYPE STRING,
PROGNAME TYPE STRING,
FORM TYPE STRING,
ROLLNAME TYPE STRING,
DOMNAME TYPE STRING,
DATATYPE TYPE STRING,
DEVCLASS TYPE STRING,
TABISREF TYPE STRING,
MODIREF TYPE STRING,
REFTABLE TYPE STRING,
REFFIELD TYPE STRING,
AUTHOR TYPE STRING,
INFORMATION TYPE STRING,
INFORMATION_ADD TYPE STRING,
INFORMATION_CONV TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TIVCAEC_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_TIVCAEC_STR-TABNAME sy-vline 
WA_TIVCAEC_STR-FIELDNAME sy-vline 
WA_TIVCAEC_STR-DESCRIPTION sy-vline 
WA_TIVCAEC_STR-ECSTATUS sy-vline 
WA_TIVCAEC_STR-PROGNAME sy-vline 
WA_TIVCAEC_STR-FORM sy-vline 
WA_TIVCAEC_STR-ROLLNAME sy-vline 
WA_TIVCAEC_STR-DOMNAME sy-vline 
WA_TIVCAEC_STR-DATATYPE sy-vline 
WA_TIVCAEC_STR-DEVCLASS sy-vline 
WA_TIVCAEC_STR-TABISREF sy-vline 
WA_TIVCAEC_STR-MODIREF sy-vline 
WA_TIVCAEC_STR-REFTABLE sy-vline 
WA_TIVCAEC_STR-REFFIELD sy-vline 
WA_TIVCAEC_STR-AUTHOR sy-vline 
WA_TIVCAEC_STR-INFORMATION sy-vline 
WA_TIVCAEC_STR-INFORMATION_ADD sy-vline 
WA_TIVCAEC_STR-INFORMATION_CONV sy-vline      INTO ld_text SEPARATED BY SPACE.

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