ABAP Select data from SAP table EWA_EHS_APPROVAL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EWA_EHS_APPROVAL
*  INTO TABLE @DATA(IT_EWA_EHS_APPROVAL2).
*--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_EWA_EHS_APPROVAL INDEX 1 INTO DATA(WA_EWA_EHS_APPROVAL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<EWA_EHS_APPROVAL>-WAKEY = 1.
<EWA_EHS_APPROVAL>-WAKEYDES = 1.
<EWA_EHS_APPROVAL>-WAKEYCATLG = 1.
<EWA_EHS_APPROVAL>-WAKEYSURV = 1.
<EWA_EHS_APPROVAL>-VALFR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EWA_EHS_APPROVAL-VALTO, sy-vline,
  WA_EWA_EHS_APPROVAL-APPQUAN, sy-vline,
  WA_EWA_EHS_APPROVAL-APPQUANU, sy-vline,
  WA_EWA_EHS_APPROVAL-APCKQUAN, sy-vline,
  WA_EWA_EHS_APPROVAL-APCKU, sy-vline,
  WA_EWA_EHS_APPROVAL-APDISQUAN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_EWA_EHS_APPROVAL 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_EWA_EHS_APPROVAL 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_EWA_EHS_APPROVAL INTO WA_EWA_EHS_APPROVAL.


*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 CUNIT, internal->external for field APPQUANU
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_EWA_EHS_APPROVAL-APPQUANU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EWA_EHS_APPROVAL-APPQUANU.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field APCKU
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_EWA_EHS_APPROVAL-APCKU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EWA_EHS_APPROVAL-APCKU.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field APDISU
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_EWA_EHS_APPROVAL-APDISU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EWA_EHS_APPROVAL-APDISU.
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_EWA_EHS_APPROVAL_STR, 
WAKEY TYPE STRING,
WAKEYDES TYPE STRING,
WAKEYCATLG TYPE STRING,
WAKEYSURV TYPE STRING,
VALFR TYPE STRING,
VALTO TYPE STRING,
APPQUAN TYPE STRING,
APPQUANU TYPE STRING,
APCKQUAN TYPE STRING,
APCKU TYPE STRING,
APDISQUAN TYPE STRING,
APDISU TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EWA_EHS_APPROVAL_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_EWA_EHS_APPROVAL_STR-WAKEY sy-vline 
WA_EWA_EHS_APPROVAL_STR-WAKEYDES sy-vline 
WA_EWA_EHS_APPROVAL_STR-WAKEYCATLG sy-vline 
WA_EWA_EHS_APPROVAL_STR-WAKEYSURV sy-vline 
WA_EWA_EHS_APPROVAL_STR-VALFR sy-vline 
WA_EWA_EHS_APPROVAL_STR-VALTO sy-vline 
WA_EWA_EHS_APPROVAL_STR-APPQUAN sy-vline 
WA_EWA_EHS_APPROVAL_STR-APPQUANU sy-vline 
WA_EWA_EHS_APPROVAL_STR-APCKQUAN sy-vline 
WA_EWA_EHS_APPROVAL_STR-APCKU sy-vline 
WA_EWA_EHS_APPROVAL_STR-APDISQUAN sy-vline 
WA_EWA_EHS_APPROVAL_STR-APDISU sy-vline      INTO ld_text SEPARATED BY SPACE.

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