ABAP Select data from SAP table RMPS_GENSPHIST_ALV into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RMPS_GENSPHIST_ALV
*  INTO TABLE @DATA(IT_RMPS_GENSPHIST_ALV2).
*--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_RMPS_GENSPHIST_ALV INDEX 1 INTO DATA(WA_RMPS_GENSPHIST_ALV2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RMPS_GENSPHIST_ALV>-MANDT = 1.
<RMPS_GENSPHIST_ALV>-GENSPTYPE = 1.
<RMPS_GENSPHIST_ALV>-RMSID = 1.
<RMPS_GENSPHIST_ALV>-SPSID = 1.
<RMPS_GENSPHIST_ALV>-DOC_CLASS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RMPS_GENSPHIST_ALV-DOC_ID, sy-vline,
  WA_RMPS_GENSPHIST_ALV-PDIRID, sy-vline,
  WA_RMPS_GENSPHIST_ALV-PATHID, sy-vline,
  WA_RMPS_GENSPHIST_ALV-DOC_REF, sy-vline,
  WA_RMPS_GENSPHIST_ALV-INC_DATE, sy-vline,
  WA_RMPS_GENSPHIST_ALV-SENDER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RMPS_GENSPHIST_ALV 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_RMPS_GENSPHIST_ALV 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_RMPS_GENSPHIST_ALV INTO WA_RMPS_GENSPHIST_ALV.


*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 BEGDA, internal->external for field INC_DATE
CALL FUNCTION 'CONVERSION_EXIT_BEGDA_OUTPUT'
  EXPORTING
    input =                      WA_RMPS_GENSPHIST_ALV-INC_DATE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RMPS_GENSPHIST_ALV-INC_DATE.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit TSTLC, internal->external for field CREATED_AT
CALL FUNCTION 'CONVERSION_EXIT_TSTLC_OUTPUT'
  EXPORTING
    input =                      WA_RMPS_GENSPHIST_ALV-CREATED_AT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RMPS_GENSPHIST_ALV-CREATED_AT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTLC, internal->external for field DELETED_AT
CALL FUNCTION 'CONVERSION_EXIT_TSTLC_OUTPUT'
  EXPORTING
    input =                      WA_RMPS_GENSPHIST_ALV-DELETED_AT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RMPS_GENSPHIST_ALV-DELETED_AT.
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_RMPS_GENSPHIST_ALV_STR, 
MANDT TYPE STRING,
GENSPTYPE TYPE STRING,
RMSID TYPE STRING,
SPSID TYPE STRING,
DOC_CLASS TYPE STRING,
DOC_ID TYPE STRING,
PDIRID TYPE STRING,
PATHID TYPE STRING,
DOC_REF TYPE STRING,
INC_DATE TYPE STRING,
SENDER TYPE STRING,
SUBJECT TYPE STRING,
DOCTYPE TYPE STRING,
FLG_DEL TYPE STRING,
FPLAN_POS TYPE STRING,
CREATED_AT TYPE STRING,
CREATED_BY TYPE STRING,
DELETED_AT TYPE STRING,
DELETED_BY TYPE STRING,
DOCTYPETEXT TYPE STRING,
SENDER_TEXT TYPE STRING,
DEL_ICON TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RMPS_GENSPHIST_ALV_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_RMPS_GENSPHIST_ALV_STR-MANDT sy-vline 
WA_RMPS_GENSPHIST_ALV_STR-GENSPTYPE sy-vline 
WA_RMPS_GENSPHIST_ALV_STR-RMSID sy-vline 
WA_RMPS_GENSPHIST_ALV_STR-SPSID sy-vline 
WA_RMPS_GENSPHIST_ALV_STR-DOC_CLASS sy-vline 
WA_RMPS_GENSPHIST_ALV_STR-DOC_ID sy-vline 
WA_RMPS_GENSPHIST_ALV_STR-PDIRID sy-vline 
WA_RMPS_GENSPHIST_ALV_STR-PATHID sy-vline 
WA_RMPS_GENSPHIST_ALV_STR-DOC_REF sy-vline 
WA_RMPS_GENSPHIST_ALV_STR-INC_DATE sy-vline 
WA_RMPS_GENSPHIST_ALV_STR-SENDER sy-vline 
WA_RMPS_GENSPHIST_ALV_STR-SUBJECT sy-vline 
WA_RMPS_GENSPHIST_ALV_STR-DOCTYPE sy-vline 
WA_RMPS_GENSPHIST_ALV_STR-FLG_DEL sy-vline 
WA_RMPS_GENSPHIST_ALV_STR-FPLAN_POS sy-vline 
WA_RMPS_GENSPHIST_ALV_STR-CREATED_AT sy-vline 
WA_RMPS_GENSPHIST_ALV_STR-CREATED_BY sy-vline 
WA_RMPS_GENSPHIST_ALV_STR-DELETED_AT sy-vline 
WA_RMPS_GENSPHIST_ALV_STR-DELETED_BY sy-vline 
WA_RMPS_GENSPHIST_ALV_STR-DOCTYPETEXT sy-vline 
WA_RMPS_GENSPHIST_ALV_STR-SENDER_TEXT sy-vline 
WA_RMPS_GENSPHIST_ALV_STR-DEL_ICON sy-vline      INTO ld_text SEPARATED BY SPACE.

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