ABAP Select data from SAP table /MVA/AMC_FCS_POL_JOURNAL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /MVA/AMC_FCS_POL_JOURNAL
*  INTO TABLE @DATA(IT_/MVA/AMC_FCS_POL_JOURNAL2).
*--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_/MVA/AMC_FCS_POL_JOURNAL INDEX 1 INTO DATA(WA_/MVA/AMC_FCS_POL_JOURNAL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
</MVA/AMC_FCS_POL_JOURNAL>-WA_JOURNAL = 1.
</MVA/AMC_FCS_POL_JOURNAL>-IS_APL_JOURNAL = 1.
</MVA/AMC_FCS_POL_JOURNAL>-POL_ID = 1.
</MVA/AMC_FCS_POL_JOURNAL>-APL_ID = 1.
</MVA/AMC_FCS_POL_JOURNAL>-BIZPRC_ID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/MVA/AMC_FCS_POL_JOURNAL-AMN_ID, sy-vline,
  WA_/MVA/AMC_FCS_POL_JOURNAL-BIZPRC_NO, sy-vline,
  WA_/MVA/AMC_FCS_POL_JOURNAL-EFFECTIVE_DT, sy-vline,
  WA_/MVA/AMC_FCS_POL_JOURNAL-ACCESS_MODE, sy-vline,
  WA_/MVA/AMC_FCS_POL_JOURNAL-PPRUNNO_ID, sy-vline,
  WA_/MVA/AMC_FCS_POL_JOURNAL-JOURNALSTATE_T, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/MVA/AMC_FCS_POL_JOURNAL 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_/MVA/AMC_FCS_POL_JOURNAL 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_/MVA/AMC_FCS_POL_JOURNAL INTO WA_/MVA/AMC_FCS_POL_JOURNAL.


*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 APL_NO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/MVA/AMC_FCS_POL_JOURNAL-APL_NO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/MVA/AMC_FCS_POL_JOURNAL-APL_NO.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field AMNNR_TT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/MVA/AMC_FCS_POL_JOURNAL-AMNNR_TT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/MVA/AMC_FCS_POL_JOURNAL-AMNNR_TT.
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_/MVA/AMC_FCS_POL_JOURNAL_STR, 
WA_JOURNAL TYPE STRING,
IS_APL_JOURNAL TYPE STRING,
POL_ID TYPE STRING,
APL_ID TYPE STRING,
BIZPRC_ID TYPE STRING,
AMN_ID TYPE STRING,
BIZPRC_NO TYPE STRING,
EFFECTIVE_DT TYPE STRING,
ACCESS_MODE TYPE STRING,
PPRUNNO_ID TYPE STRING,
JOURNALSTATE_T TYPE STRING,
APL_NO TYPE STRING,
POL_NO TYPE STRING,
APPLIN_DT TYPE STRING,
APPL_DT TYPE STRING,
BEGINAPL_TS TYPE STRING,
BEGINWHO_DT TYPE STRING,
AMNNR_TT TYPE STRING,
ONLYNONUPDATE_FG TYPE STRING,
CHGREASON_ID TYPE STRING,
OTHCHGREASON_TT TYPE STRING,
CUST1_TT TYPE STRING,
CUST2_TT TYPE STRING,
CUST3_TT TYPE STRING,
JOURNALHEADER_CI TYPE STRING,
CUSTOMER_PB_CI TYPE STRING,
CHGREASON_TT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/MVA/AMC_FCS_POL_JOURNAL_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_/MVA/AMC_FCS_POL_JOURNAL_STR-WA_JOURNAL sy-vline 
WA_/MVA/AMC_FCS_POL_JOURNAL_STR-IS_APL_JOURNAL sy-vline 
WA_/MVA/AMC_FCS_POL_JOURNAL_STR-POL_ID sy-vline 
WA_/MVA/AMC_FCS_POL_JOURNAL_STR-APL_ID sy-vline 
WA_/MVA/AMC_FCS_POL_JOURNAL_STR-BIZPRC_ID sy-vline 
WA_/MVA/AMC_FCS_POL_JOURNAL_STR-AMN_ID sy-vline 
WA_/MVA/AMC_FCS_POL_JOURNAL_STR-BIZPRC_NO sy-vline 
WA_/MVA/AMC_FCS_POL_JOURNAL_STR-EFFECTIVE_DT sy-vline 
WA_/MVA/AMC_FCS_POL_JOURNAL_STR-ACCESS_MODE sy-vline 
WA_/MVA/AMC_FCS_POL_JOURNAL_STR-PPRUNNO_ID sy-vline 
WA_/MVA/AMC_FCS_POL_JOURNAL_STR-JOURNALSTATE_T sy-vline 
WA_/MVA/AMC_FCS_POL_JOURNAL_STR-APL_NO sy-vline 
WA_/MVA/AMC_FCS_POL_JOURNAL_STR-POL_NO sy-vline 
WA_/MVA/AMC_FCS_POL_JOURNAL_STR-APPLIN_DT sy-vline 
WA_/MVA/AMC_FCS_POL_JOURNAL_STR-APPL_DT sy-vline 
WA_/MVA/AMC_FCS_POL_JOURNAL_STR-BEGINAPL_TS sy-vline 
WA_/MVA/AMC_FCS_POL_JOURNAL_STR-BEGINWHO_DT sy-vline 
WA_/MVA/AMC_FCS_POL_JOURNAL_STR-AMNNR_TT sy-vline 
WA_/MVA/AMC_FCS_POL_JOURNAL_STR-ONLYNONUPDATE_FG sy-vline 
WA_/MVA/AMC_FCS_POL_JOURNAL_STR-CHGREASON_ID sy-vline 
WA_/MVA/AMC_FCS_POL_JOURNAL_STR-OTHCHGREASON_TT sy-vline 
WA_/MVA/AMC_FCS_POL_JOURNAL_STR-CUST1_TT sy-vline 
WA_/MVA/AMC_FCS_POL_JOURNAL_STR-CUST2_TT sy-vline 
WA_/MVA/AMC_FCS_POL_JOURNAL_STR-CUST3_TT sy-vline 
WA_/MVA/AMC_FCS_POL_JOURNAL_STR-JOURNALHEADER_CI sy-vline 
WA_/MVA/AMC_FCS_POL_JOURNAL_STR-CUSTOMER_PB_CI sy-vline 
WA_/MVA/AMC_FCS_POL_JOURNAL_STR-CHGREASON_TT sy-vline      INTO ld_text SEPARATED BY SPACE.

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