ABAP Select data from SAP table JVA_FUND_SCREEN into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM JVA_FUND_SCREEN
*  INTO TABLE @DATA(IT_JVA_FUND_SCREEN2).
*--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_JVA_FUND_SCREEN INDEX 1 INTO DATA(WA_JVA_FUND_SCREEN2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<JVA_FUND_SCREEN>-RUN_DATE = 1.
<JVA_FUND_SCREEN>-RUN_ID = 1.
<JVA_FUND_SCREEN>-BUDAT = 1.
<JVA_FUND_SCREEN>-BLDAT = 1.
<JVA_FUND_SCREEN>-BKTXT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_JVA_FUND_SCREEN-STGRD, sy-vline,
  WA_JVA_FUND_SCREEN-CANCEL, sy-vline,
  WA_JVA_FUND_SCREEN-TITLE, sy-vline,
  WA_JVA_FUND_SCREEN-DIALOG_MODE, sy-vline,
  WA_JVA_FUND_SCREEN-X_NET, sy-vline,
  WA_JVA_FUND_SCREEN-X_LIST, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_JVA_FUND_SCREEN 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_JVA_FUND_SCREEN 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_JVA_FUND_SCREEN INTO WA_JVA_FUND_SCREEN.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_JVA_FUND_SCREEN_STR, 
RUN_DATE TYPE STRING,
RUN_ID TYPE STRING,
BUDAT TYPE STRING,
BLDAT TYPE STRING,
BKTXT TYPE STRING,
STGRD TYPE STRING,
CANCEL TYPE STRING,
TITLE TYPE STRING,
DIALOG_MODE TYPE STRING,
X_NET TYPE STRING,
X_LIST TYPE STRING,
X_SAVE TYPE STRING,
X_POST TYPE STRING,
X_SIMU TYPE STRING,
X_TEST TYPE STRING,
X_REIMBURSE TYPE STRING,
X_ZERO_BAL TYPE STRING,
ALV_LAYOUT TYPE STRING,
X_SEL_ICGRP TYPE STRING,
X_SEL_UVENT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_JVA_FUND_SCREEN_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_JVA_FUND_SCREEN_STR-RUN_DATE sy-vline 
WA_JVA_FUND_SCREEN_STR-RUN_ID sy-vline 
WA_JVA_FUND_SCREEN_STR-BUDAT sy-vline 
WA_JVA_FUND_SCREEN_STR-BLDAT sy-vline 
WA_JVA_FUND_SCREEN_STR-BKTXT sy-vline 
WA_JVA_FUND_SCREEN_STR-STGRD sy-vline 
WA_JVA_FUND_SCREEN_STR-CANCEL sy-vline 
WA_JVA_FUND_SCREEN_STR-TITLE sy-vline 
WA_JVA_FUND_SCREEN_STR-DIALOG_MODE sy-vline 
WA_JVA_FUND_SCREEN_STR-X_NET sy-vline 
WA_JVA_FUND_SCREEN_STR-X_LIST sy-vline 
WA_JVA_FUND_SCREEN_STR-X_SAVE sy-vline 
WA_JVA_FUND_SCREEN_STR-X_POST sy-vline 
WA_JVA_FUND_SCREEN_STR-X_SIMU sy-vline 
WA_JVA_FUND_SCREEN_STR-X_TEST sy-vline 
WA_JVA_FUND_SCREEN_STR-X_REIMBURSE sy-vline 
WA_JVA_FUND_SCREEN_STR-X_ZERO_BAL sy-vline 
WA_JVA_FUND_SCREEN_STR-ALV_LAYOUT sy-vline 
WA_JVA_FUND_SCREEN_STR-X_SEL_ICGRP sy-vline 
WA_JVA_FUND_SCREEN_STR-X_SEL_UVENT sy-vline      INTO ld_text SEPARATED BY SPACE.

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