ABAP Select data from SAP table ACRSV_EXTR_PVAL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ACRSV_EXTR_PVAL
*  INTO TABLE @DATA(IT_ACRSV_EXTR_PVAL2).
*--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_ACRSV_EXTR_PVAL INDEX 1 INTO DATA(WA_ACRSV_EXTR_PVAL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ACRSV_EXTR_PVAL>-CLIENT = 1.
<ACRSV_EXTR_PVAL>-DESTINATION = 1.
<ACRSV_EXTR_PVAL>-EXTRACTION_MODELNAME = 1.
<ACRSV_EXTR_PVAL>-EXTRACTOR_NAME = 1.
<ACRSV_EXTR_PVAL>-COUNTRY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ACRSV_EXTR_PVAL-PARAMETER_GROUP, sy-vline,
  WA_ACRSV_EXTR_PVAL-PARAMETER_NAME, sy-vline,
  WA_ACRSV_EXTR_PVAL-SEQUENCE_NUMBER, sy-vline,
  WA_ACRSV_EXTR_PVAL-SELECTION_OPTION, sy-vline,
  WA_ACRSV_EXTR_PVAL-LOW_VALUE, sy-vline,
  WA_ACRSV_EXTR_PVAL-HIGH_VALUE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ACRSV_EXTR_PVAL 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_ACRSV_EXTR_PVAL 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_ACRSV_EXTR_PVAL INTO WA_ACRSV_EXTR_PVAL.


*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_ACRSV_EXTR_PVAL_STR, 
CLIENT TYPE STRING,
DESTINATION TYPE STRING,
EXTRACTION_MODELNAME TYPE STRING,
EXTRACTOR_NAME TYPE STRING,
COUNTRY TYPE STRING,
PARAMETER_GROUP TYPE STRING,
PARAMETER_NAME TYPE STRING,
SEQUENCE_NUMBER TYPE STRING,
SELECTION_OPTION TYPE STRING,
LOW_VALUE TYPE STRING,
HIGH_VALUE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ACRSV_EXTR_PVAL_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_ACRSV_EXTR_PVAL_STR-CLIENT sy-vline 
WA_ACRSV_EXTR_PVAL_STR-DESTINATION sy-vline 
WA_ACRSV_EXTR_PVAL_STR-EXTRACTION_MODELNAME sy-vline 
WA_ACRSV_EXTR_PVAL_STR-EXTRACTOR_NAME sy-vline 
WA_ACRSV_EXTR_PVAL_STR-COUNTRY sy-vline 
WA_ACRSV_EXTR_PVAL_STR-PARAMETER_GROUP sy-vline 
WA_ACRSV_EXTR_PVAL_STR-PARAMETER_NAME sy-vline 
WA_ACRSV_EXTR_PVAL_STR-SEQUENCE_NUMBER sy-vline 
WA_ACRSV_EXTR_PVAL_STR-SELECTION_OPTION sy-vline 
WA_ACRSV_EXTR_PVAL_STR-LOW_VALUE sy-vline 
WA_ACRSV_EXTR_PVAL_STR-HIGH_VALUE sy-vline      INTO ld_text SEPARATED BY SPACE.

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