ABAP Select data from SAP table ACE_REP_PARAMETER_S4 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP ACE_REP_PARAMETER_S4 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 ACE_REP_PARAMETER_S4. 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 ACE_REP_PARAMETER_S4 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_ACE_REP_PARAMETER_S4 TYPE STANDARD TABLE OF ACE_REP_PARAMETER_S4,
      WA_ACE_REP_PARAMETER_S4 TYPE ACE_REP_PARAMETER_S4,
      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: <ACE_REP_PARAMETER_S4> TYPE ACE_REP_PARAMETER_S4.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_ACE_REP_PARAMETER_S4.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM ACE_REP_PARAMETER_S4
  INTO TABLE IT_ACE_REP_PARAMETER_S4.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ACE_REP_PARAMETER_S4
*  INTO TABLE @DATA(IT_ACE_REP_PARAMETER_S42).
*--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_ACE_REP_PARAMETER_S4 INDEX 1 INTO DATA(WA_ACE_REP_PARAMETER_S42).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_ACE_REP_PARAMETER_S4 ASSIGNING <ACE_REP_PARAMETER_S4>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ACE_REP_PARAMETER_S4>-MANUAL_PERIOD = 1.
<ACE_REP_PARAMETER_S4>-EFFDATE = 1.
<ACE_REP_PARAMETER_S4>-KEYDATE = 1.
<ACE_REP_PARAMETER_S4>-REVERSAL_DATE = 1.
<ACE_REP_PARAMETER_S4>-PAUSE_DATE = 1.

ENDLOOP.

LOOP AT IT_ACE_REP_PARAMETER_S4 INTO WA_ACE_REP_PARAMETER_S4.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ACE_REP_PARAMETER_S4-SUSPENSION_DATE, sy-vline,
  WA_ACE_REP_PARAMETER_S4-PREMTRE_FDATE, sy-vline,
  WA_ACE_REP_PARAMETER_S4-DEACTDATE, sy-vline,
  WA_ACE_REP_PARAMETER_S4-TREEVARI, sy-vline,
  WA_ACE_REP_PARAMETER_S4-FLAG_ORG_PERIOD, sy-vline,
  WA_ACE_REP_PARAMETER_S4-FLAG_MAN_PERIOD, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ACE_REP_PARAMETER_S4 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_ACE_REP_PARAMETER_S4 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_ACE_REP_PARAMETER_S4 INTO WA_ACE_REP_PARAMETER_S4.


*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_ACE_REP_PARAMETER_S4_STR, 
MANUAL_PERIOD TYPE STRING,
EFFDATE TYPE STRING,
KEYDATE TYPE STRING,
REVERSAL_DATE TYPE STRING,
PAUSE_DATE TYPE STRING,
SUSPENSION_DATE TYPE STRING,
PREMTRE_FDATE TYPE STRING,
DEACTDATE TYPE STRING,
TREEVARI TYPE STRING,
FLAG_ORG_PERIOD TYPE STRING,
FLAG_MAN_PERIOD TYPE STRING,
FLAG_MAN_PERIOD_POST TYPE STRING,
FLAG_AUTO_PERIOD TYPE STRING,
FLAG_FULL_RELEASE TYPE STRING,
FLAG_PARTIAL_RELEASE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ACE_REP_PARAMETER_S4_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_ACE_REP_PARAMETER_S4_STR-MANUAL_PERIOD sy-vline 
WA_ACE_REP_PARAMETER_S4_STR-EFFDATE sy-vline 
WA_ACE_REP_PARAMETER_S4_STR-KEYDATE sy-vline 
WA_ACE_REP_PARAMETER_S4_STR-REVERSAL_DATE sy-vline 
WA_ACE_REP_PARAMETER_S4_STR-PAUSE_DATE sy-vline 
WA_ACE_REP_PARAMETER_S4_STR-SUSPENSION_DATE sy-vline 
WA_ACE_REP_PARAMETER_S4_STR-PREMTRE_FDATE sy-vline 
WA_ACE_REP_PARAMETER_S4_STR-DEACTDATE sy-vline 
WA_ACE_REP_PARAMETER_S4_STR-TREEVARI sy-vline 
WA_ACE_REP_PARAMETER_S4_STR-FLAG_ORG_PERIOD sy-vline 
WA_ACE_REP_PARAMETER_S4_STR-FLAG_MAN_PERIOD sy-vline 
WA_ACE_REP_PARAMETER_S4_STR-FLAG_MAN_PERIOD_POST sy-vline 
WA_ACE_REP_PARAMETER_S4_STR-FLAG_AUTO_PERIOD sy-vline 
WA_ACE_REP_PARAMETER_S4_STR-FLAG_FULL_RELEASE sy-vline 
WA_ACE_REP_PARAMETER_S4_STR-FLAG_PARTIAL_RELEASE sy-vline      INTO ld_text SEPARATED BY SPACE.

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