ABAP Select data from SAP table EHS_RDG_DETAIL_GEN_KEYS_T into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP EHS_RDG_DETAIL_GEN_KEYS_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 EHS_RDG_DETAIL_GEN_KEYS_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 EHS_RDG_DETAIL_GEN_KEYS_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_EHS_RDG_DETAIL_GEN_KEYS_T TYPE STANDARD TABLE OF EHS_RDG_DETAIL_GEN_KEYS_T,
      WA_EHS_RDG_DETAIL_GEN_KEYS_T TYPE EHS_RDG_DETAIL_GEN_KEYS_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: <EHS_RDG_DETAIL_GEN_KEYS_T> TYPE EHS_RDG_DETAIL_GEN_KEYS_T.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EHS_RDG_DETAIL_GEN_KEYS_T
*  INTO TABLE @DATA(IT_EHS_RDG_DETAIL_GEN_KEYS_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_EHS_RDG_DETAIL_GEN_KEYS_T INDEX 1 INTO DATA(WA_EHS_RDG_DETAIL_GEN_KEYS_T2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<EHS_RDG_DETAIL_GEN_KEYS_T>-RECN = 1.
<EHS_RDG_DETAIL_GEN_KEYS_T>-ACTN = 1.
<EHS_RDG_DETAIL_GEN_KEYS_T>-VALFR = 1.
<EHS_RDG_DETAIL_GEN_KEYS_T>-VALTO = 1.
<EHS_RDG_DETAIL_GEN_KEYS_T>-RECNROOT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EHS_RDG_DETAIL_GEN_KEYS_T-KEY1, sy-vline,
  WA_EHS_RDG_DETAIL_GEN_KEYS_T-KEY2, sy-vline,
  WA_EHS_RDG_DETAIL_GEN_KEYS_T-KEY3, sy-vline,
  WA_EHS_RDG_DETAIL_GEN_KEYS_T-KEY4, sy-vline,
  WA_EHS_RDG_DETAIL_GEN_KEYS_T-KEY5, sy-vline,
  WA_EHS_RDG_DETAIL_GEN_KEYS_T-KEY6, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_EHS_RDG_DETAIL_GEN_KEYS_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_EHS_RDG_DETAIL_GEN_KEYS_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_EHS_RDG_DETAIL_GEN_KEYS_T INTO WA_EHS_RDG_DETAIL_GEN_KEYS_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.

*Conversion exit ALPHA, internal->external for field RECN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EHS_RDG_DETAIL_GEN_KEYS_T-RECN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EHS_RDG_DETAIL_GEN_KEYS_T-RECN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ACTN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EHS_RDG_DETAIL_GEN_KEYS_T-ACTN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EHS_RDG_DETAIL_GEN_KEYS_T-ACTN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RECNROOT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EHS_RDG_DETAIL_GEN_KEYS_T-RECNROOT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EHS_RDG_DETAIL_GEN_KEYS_T-RECNROOT.
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_EHS_RDG_DETAIL_GEN_KEYS_T_STR, 
RECN TYPE STRING,
ACTN TYPE STRING,
VALFR TYPE STRING,
VALTO TYPE STRING,
RECNROOT TYPE STRING,
KEY1 TYPE STRING,
KEY2 TYPE STRING,
KEY3 TYPE STRING,
KEY4 TYPE STRING,
KEY5 TYPE STRING,
KEY6 TYPE STRING,
KEY7 TYPE STRING,
KEY8 TYPE STRING,
KEY9 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EHS_RDG_DETAIL_GEN_KEYS_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_EHS_RDG_DETAIL_GEN_KEYS_T_STR-RECN sy-vline 
WA_EHS_RDG_DETAIL_GEN_KEYS_T_STR-ACTN sy-vline 
WA_EHS_RDG_DETAIL_GEN_KEYS_T_STR-VALFR sy-vline 
WA_EHS_RDG_DETAIL_GEN_KEYS_T_STR-VALTO sy-vline 
WA_EHS_RDG_DETAIL_GEN_KEYS_T_STR-RECNROOT sy-vline 
WA_EHS_RDG_DETAIL_GEN_KEYS_T_STR-KEY1 sy-vline 
WA_EHS_RDG_DETAIL_GEN_KEYS_T_STR-KEY2 sy-vline 
WA_EHS_RDG_DETAIL_GEN_KEYS_T_STR-KEY3 sy-vline 
WA_EHS_RDG_DETAIL_GEN_KEYS_T_STR-KEY4 sy-vline 
WA_EHS_RDG_DETAIL_GEN_KEYS_T_STR-KEY5 sy-vline 
WA_EHS_RDG_DETAIL_GEN_KEYS_T_STR-KEY6 sy-vline 
WA_EHS_RDG_DETAIL_GEN_KEYS_T_STR-KEY7 sy-vline 
WA_EHS_RDG_DETAIL_GEN_KEYS_T_STR-KEY8 sy-vline 
WA_EHS_RDG_DETAIL_GEN_KEYS_T_STR-KEY9 sy-vline      INTO ld_text SEPARATED BY SPACE.

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