ABAP Select data from SAP table E2JVISA into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP E2JVISA 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 E2JVISA. 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 E2JVISA 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_E2JVISA TYPE STANDARD TABLE OF E2JVISA,
      WA_E2JVISA TYPE E2JVISA,
      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: <E2JVISA> TYPE E2JVISA.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_E2JVISA.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM E2JVISA
  INTO TABLE IT_E2JVISA.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM E2JVISA
*  INTO TABLE @DATA(IT_E2JVISA2).
*--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_E2JVISA INDEX 1 INTO DATA(WA_E2JVISA2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_E2JVISA ASSIGNING <E2JVISA>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<E2JVISA>-AUTQU = 1.
<E2JVISA>-AUTIF = 1.
<E2JVISA>-SECQU = 1.
<E2JVISA>-SECIF = 1.
<E2JVISA>-IXSQU = 1.

ENDLOOP.

LOOP AT IT_E2JVISA INTO WA_E2JVISA.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_E2JVISA-IXSID, sy-vline,
  WA_E2JVISA-IXRQU, sy-vline,
  WA_E2JVISA-IXRID, sy-vline,
  WA_E2JVISA-IXDAT, sy-vline,
  WA_E2JVISA-IXTIM, sy-vline,
  WA_E2JVISA-IXSTD, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_E2JVISA 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_E2JVISA 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_E2JVISA INTO WA_E2JVISA.


*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_E2JVISA_STR, 
AUTQU TYPE STRING,
AUTIF TYPE STRING,
SECQU TYPE STRING,
SECIF TYPE STRING,
IXSQU TYPE STRING,
IXSID TYPE STRING,
IXRQU TYPE STRING,
IXRID TYPE STRING,
IXDAT TYPE STRING,
IXTIM TYPE STRING,
IXSTD TYPE STRING,
IXVER TYPE STRING,
IXNUM TYPE STRING,
ACKNO TYPE STRING,
TESTX TYPE STRING,
SESEP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_E2JVISA_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_E2JVISA_STR-AUTQU sy-vline 
WA_E2JVISA_STR-AUTIF sy-vline 
WA_E2JVISA_STR-SECQU sy-vline 
WA_E2JVISA_STR-SECIF sy-vline 
WA_E2JVISA_STR-IXSQU sy-vline 
WA_E2JVISA_STR-IXSID sy-vline 
WA_E2JVISA_STR-IXRQU sy-vline 
WA_E2JVISA_STR-IXRID sy-vline 
WA_E2JVISA_STR-IXDAT sy-vline 
WA_E2JVISA_STR-IXTIM sy-vline 
WA_E2JVISA_STR-IXSTD sy-vline 
WA_E2JVISA_STR-IXVER sy-vline 
WA_E2JVISA_STR-IXNUM sy-vline 
WA_E2JVISA_STR-ACKNO sy-vline 
WA_E2JVISA_STR-TESTX sy-vline 
WA_E2JVISA_STR-SESEP sy-vline      INTO ld_text SEPARATED BY SPACE.

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