ABAP Select data from SAP table T8JVA_PARAM into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP T8JVA_PARAM 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 T8JVA_PARAM. 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 T8JVA_PARAM 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_T8JVA_PARAM TYPE STANDARD TABLE OF T8JVA_PARAM,
      WA_T8JVA_PARAM TYPE T8JVA_PARAM,
      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: <T8JVA_PARAM> TYPE T8JVA_PARAM.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_T8JVA_PARAM.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM T8JVA_PARAM
  INTO TABLE IT_T8JVA_PARAM.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM T8JVA_PARAM
*  INTO TABLE @DATA(IT_T8JVA_PARAM2).
*--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_T8JVA_PARAM INDEX 1 INTO DATA(WA_T8JVA_PARAM2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_T8JVA_PARAM ASSIGNING <T8JVA_PARAM>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<T8JVA_PARAM>-MANDT = 1.
<T8JVA_PARAM>-CUTB_TAX_CLEAR = 1.
<T8JVA_PARAM>-XFELD2 = 1.
<T8JVA_PARAM>-XFELD3 = 1.
<T8JVA_PARAM>-XFELD4 = 1.

ENDLOOP.

LOOP AT IT_T8JVA_PARAM INTO WA_T8JVA_PARAM.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_T8JVA_PARAM-XFELD5, sy-vline,
  WA_T8JVA_PARAM-XFELD6, sy-vline,
  WA_T8JVA_PARAM-XFELD7, sy-vline,
  WA_T8JVA_PARAM-XFELD8, sy-vline,
  WA_T8JVA_PARAM-XFELD9, sy-vline,
  WA_T8JVA_PARAM-XFELD10, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_T8JVA_PARAM 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_T8JVA_PARAM 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_T8JVA_PARAM INTO WA_T8JVA_PARAM.


*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_T8JVA_PARAM_STR, 
MANDT TYPE STRING,
CUTB_TAX_CLEAR TYPE STRING,
XFELD2 TYPE STRING,
XFELD3 TYPE STRING,
XFELD4 TYPE STRING,
XFELD5 TYPE STRING,
XFELD6 TYPE STRING,
XFELD7 TYPE STRING,
XFELD8 TYPE STRING,
XFELD9 TYPE STRING,
XFELD10 TYPE STRING,
XFELD11 TYPE STRING,
XFELD12 TYPE STRING,
XFELD13 TYPE STRING,
XFELD14 TYPE STRING,
XFELD15 TYPE STRING,
XFELD16 TYPE STRING,
XFELD17 TYPE STRING,
XFELD18 TYPE STRING,
XFELD19 TYPE STRING,
XFELD20 TYPE STRING,
PARAM1 TYPE STRING,
PARAM2 TYPE STRING,
PARAM3 TYPE STRING,
PARAM4 TYPE STRING,
PARAM5 TYPE STRING,
PARAM6 TYPE STRING,
PARAM7 TYPE STRING,
PARAM8 TYPE STRING,
PARAM9 TYPE STRING,
PARAM10 TYPE STRING,
PARA3_0 TYPE STRING,
PARA3_1 TYPE STRING,
PARA3_2 TYPE STRING,
PARA3_3 TYPE STRING,
PARA3_4 TYPE STRING,
PARA3_5 TYPE STRING,
PARA3_6 TYPE STRING,
PARA3_7 TYPE STRING,
PARA3_8 TYPE STRING,
PARA3_9 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_T8JVA_PARAM_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_T8JVA_PARAM_STR-MANDT sy-vline 
WA_T8JVA_PARAM_STR-CUTB_TAX_CLEAR sy-vline 
WA_T8JVA_PARAM_STR-XFELD2 sy-vline 
WA_T8JVA_PARAM_STR-XFELD3 sy-vline 
WA_T8JVA_PARAM_STR-XFELD4 sy-vline 
WA_T8JVA_PARAM_STR-XFELD5 sy-vline 
WA_T8JVA_PARAM_STR-XFELD6 sy-vline 
WA_T8JVA_PARAM_STR-XFELD7 sy-vline 
WA_T8JVA_PARAM_STR-XFELD8 sy-vline 
WA_T8JVA_PARAM_STR-XFELD9 sy-vline 
WA_T8JVA_PARAM_STR-XFELD10 sy-vline 
WA_T8JVA_PARAM_STR-XFELD11 sy-vline 
WA_T8JVA_PARAM_STR-XFELD12 sy-vline 
WA_T8JVA_PARAM_STR-XFELD13 sy-vline 
WA_T8JVA_PARAM_STR-XFELD14 sy-vline 
WA_T8JVA_PARAM_STR-XFELD15 sy-vline 
WA_T8JVA_PARAM_STR-XFELD16 sy-vline 
WA_T8JVA_PARAM_STR-XFELD17 sy-vline 
WA_T8JVA_PARAM_STR-XFELD18 sy-vline 
WA_T8JVA_PARAM_STR-XFELD19 sy-vline 
WA_T8JVA_PARAM_STR-XFELD20 sy-vline 
WA_T8JVA_PARAM_STR-PARAM1 sy-vline 
WA_T8JVA_PARAM_STR-PARAM2 sy-vline 
WA_T8JVA_PARAM_STR-PARAM3 sy-vline 
WA_T8JVA_PARAM_STR-PARAM4 sy-vline 
WA_T8JVA_PARAM_STR-PARAM5 sy-vline 
WA_T8JVA_PARAM_STR-PARAM6 sy-vline 
WA_T8JVA_PARAM_STR-PARAM7 sy-vline 
WA_T8JVA_PARAM_STR-PARAM8 sy-vline 
WA_T8JVA_PARAM_STR-PARAM9 sy-vline 
WA_T8JVA_PARAM_STR-PARAM10 sy-vline 
WA_T8JVA_PARAM_STR-PARA3_0 sy-vline 
WA_T8JVA_PARAM_STR-PARA3_1 sy-vline 
WA_T8JVA_PARAM_STR-PARA3_2 sy-vline 
WA_T8JVA_PARAM_STR-PARA3_3 sy-vline 
WA_T8JVA_PARAM_STR-PARA3_4 sy-vline 
WA_T8JVA_PARAM_STR-PARA3_5 sy-vline 
WA_T8JVA_PARAM_STR-PARA3_6 sy-vline 
WA_T8JVA_PARAM_STR-PARA3_7 sy-vline 
WA_T8JVA_PARAM_STR-PARA3_8 sy-vline 
WA_T8JVA_PARAM_STR-PARA3_9 sy-vline      INTO ld_text SEPARATED BY SPACE.

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