ABAP Select data from SAP table /SAPAPO/LRP_ASS_CHNGLOG_REC into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /SAPAPO/LRP_ASS_CHNGLOG_REC 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 /SAPAPO/LRP_ASS_CHNGLOG_REC. 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 /SAPAPO/LRP_ASS_CHNGLOG_REC 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_/SAPAPO/LRP_ASS_CHNGLOG_REC TYPE STANDARD TABLE OF /SAPAPO/LRP_ASS_CHNGLOG_REC,
      WA_/SAPAPO/LRP_ASS_CHNGLOG_REC TYPE /SAPAPO/LRP_ASS_CHNGLOG_REC,
      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: </SAPAPO/LRP_ASS_CHNGLOG_REC> TYPE /SAPAPO/LRP_ASS_CHNGLOG_REC.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /SAPAPO/LRP_ASS_CHNGLOG_REC
  INTO TABLE IT_/SAPAPO/LRP_ASS_CHNGLOG_REC.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SAPAPO/LRP_ASS_CHNGLOG_REC
*  INTO TABLE @DATA(IT_/SAPAPO/LRP_ASS_CHNGLOG_REC2).
*--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_/SAPAPO/LRP_ASS_CHNGLOG_REC INDEX 1 INTO DATA(WA_/SAPAPO/LRP_ASS_CHNGLOG_REC2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/SAPAPO/LRP_ASS_CHNGLOG_REC ASSIGNING </SAPAPO/LRP_ASS_CHNGLOG_REC>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SAPAPO/LRP_ASS_CHNGLOG_REC>-MANDT = 1.
</SAPAPO/LRP_ASS_CHNGLOG_REC>-VERSIONID = 1.
</SAPAPO/LRP_ASS_CHNGLOG_REC>-SIMID = 1.
</SAPAPO/LRP_ASS_CHNGLOG_REC>-ASSIGNUID = 1.
</SAPAPO/LRP_ASS_CHNGLOG_REC>-DEMANDUID = 1.

ENDLOOP.

LOOP AT IT_/SAPAPO/LRP_ASS_CHNGLOG_REC INTO WA_/SAPAPO/LRP_ASS_CHNGLOG_REC.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SAPAPO/LRP_ASS_CHNGLOG_REC-RESUID, sy-vline,
  WA_/SAPAPO/LRP_ASS_CHNGLOG_REC-BEG_TIME, sy-vline,
  WA_/SAPAPO/LRP_ASS_CHNGLOG_REC-END_TIME, sy-vline,
  WA_/SAPAPO/LRP_ASS_CHNGLOG_REC-DURATION, sy-vline,
  WA_/SAPAPO/LRP_ASS_CHNGLOG_REC-ROOT_UID, sy-vline,
  WA_/SAPAPO/LRP_ASS_CHNGLOG_REC-PARENT_UID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SAPAPO/LRP_ASS_CHNGLOG_REC 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_/SAPAPO/LRP_ASS_CHNGLOG_REC 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_/SAPAPO/LRP_ASS_CHNGLOG_REC INTO WA_/SAPAPO/LRP_ASS_CHNGLOG_REC.


*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 CREATED_LOGSYS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/SAPAPO/LRP_ASS_CHNGLOG_REC-CREATED_LOGSYS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPAPO/LRP_ASS_CHNGLOG_REC-CREATED_LOGSYS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field CHANGED_LOGSYS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/SAPAPO/LRP_ASS_CHNGLOG_REC-CHANGED_LOGSYS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPAPO/LRP_ASS_CHNGLOG_REC-CHANGED_LOGSYS.
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_/SAPAPO/LRP_ASS_CHNGLOG_REC_STR, 
MANDT TYPE STRING,
VERSIONID TYPE STRING,
SIMID TYPE STRING,
ASSIGNUID TYPE STRING,
DEMANDUID TYPE STRING,
RESUID TYPE STRING,
BEG_TIME TYPE STRING,
END_TIME TYPE STRING,
DURATION TYPE STRING,
ROOT_UID TYPE STRING,
PARENT_UID TYPE STRING,
BOOKING_TYPE TYPE STRING,
CONCRETE TYPE STRING,
REFINED TYPE STRING,
WTIME_BASED TYPE STRING,
TIME_RULE_UID TYPE STRING,
APPL_STATUS TYPE STRING,
DISP_STATUS TYPE STRING,
CREATED_BY TYPE STRING,
CREATED_AWTYP TYPE STRING,
CREATED_LOGSYS TYPE STRING,
CREATED TYPE STRING,
CHANGED_BY TYPE STRING,
CHANGED TYPE STRING,
CHANGED_AWTYP TYPE STRING,
CHANGED_LOGSYS TYPE STRING,
SYST_STATUS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SAPAPO/LRP_ASS_CHNGLOG_REC_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_/SAPAPO/LRP_ASS_CHNGLOG_REC_STR-MANDT sy-vline 
WA_/SAPAPO/LRP_ASS_CHNGLOG_REC_STR-VERSIONID sy-vline 
WA_/SAPAPO/LRP_ASS_CHNGLOG_REC_STR-SIMID sy-vline 
WA_/SAPAPO/LRP_ASS_CHNGLOG_REC_STR-ASSIGNUID sy-vline 
WA_/SAPAPO/LRP_ASS_CHNGLOG_REC_STR-DEMANDUID sy-vline 
WA_/SAPAPO/LRP_ASS_CHNGLOG_REC_STR-RESUID sy-vline 
WA_/SAPAPO/LRP_ASS_CHNGLOG_REC_STR-BEG_TIME sy-vline 
WA_/SAPAPO/LRP_ASS_CHNGLOG_REC_STR-END_TIME sy-vline 
WA_/SAPAPO/LRP_ASS_CHNGLOG_REC_STR-DURATION sy-vline 
WA_/SAPAPO/LRP_ASS_CHNGLOG_REC_STR-ROOT_UID sy-vline 
WA_/SAPAPO/LRP_ASS_CHNGLOG_REC_STR-PARENT_UID sy-vline 
WA_/SAPAPO/LRP_ASS_CHNGLOG_REC_STR-BOOKING_TYPE sy-vline 
WA_/SAPAPO/LRP_ASS_CHNGLOG_REC_STR-CONCRETE sy-vline 
WA_/SAPAPO/LRP_ASS_CHNGLOG_REC_STR-REFINED sy-vline 
WA_/SAPAPO/LRP_ASS_CHNGLOG_REC_STR-WTIME_BASED sy-vline 
WA_/SAPAPO/LRP_ASS_CHNGLOG_REC_STR-TIME_RULE_UID sy-vline 
WA_/SAPAPO/LRP_ASS_CHNGLOG_REC_STR-APPL_STATUS sy-vline 
WA_/SAPAPO/LRP_ASS_CHNGLOG_REC_STR-DISP_STATUS sy-vline 
WA_/SAPAPO/LRP_ASS_CHNGLOG_REC_STR-CREATED_BY sy-vline 
WA_/SAPAPO/LRP_ASS_CHNGLOG_REC_STR-CREATED_AWTYP sy-vline 
WA_/SAPAPO/LRP_ASS_CHNGLOG_REC_STR-CREATED_LOGSYS sy-vline 
WA_/SAPAPO/LRP_ASS_CHNGLOG_REC_STR-CREATED sy-vline 
WA_/SAPAPO/LRP_ASS_CHNGLOG_REC_STR-CHANGED_BY sy-vline 
WA_/SAPAPO/LRP_ASS_CHNGLOG_REC_STR-CHANGED sy-vline 
WA_/SAPAPO/LRP_ASS_CHNGLOG_REC_STR-CHANGED_AWTYP sy-vline 
WA_/SAPAPO/LRP_ASS_CHNGLOG_REC_STR-CHANGED_LOGSYS sy-vline 
WA_/SAPAPO/LRP_ASS_CHNGLOG_REC_STR-SYST_STATUS sy-vline      INTO ld_text SEPARATED BY SPACE.

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