ABAP Select data from SAP table T8JVM01 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP T8JVM01 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 T8JVM01. 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 T8JVM01 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_T8JVM01 TYPE STANDARD TABLE OF T8JVM01,
      WA_T8JVM01 TYPE T8JVM01,
      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: <T8JVM01> TYPE T8JVM01.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_T8JVM01.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM T8JVM01
  INTO TABLE IT_T8JVM01.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM T8JVM01
*  INTO TABLE @DATA(IT_T8JVM012).
*--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_T8JVM01 INDEX 1 INTO DATA(WA_T8JVM012).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_T8JVM01 ASSIGNING <T8JVM01>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<T8JVM01>-GR_YEAR = 1.
<T8JVM01>-GR_DOC = 1.
<T8JVM01>-GR_LINE = 1.
<T8JVM01>-GR_QUANT = 1.
<T8JVM01>-GR_REMAIN_QUANT = 1.

ENDLOOP.

LOOP AT IT_T8JVM01 INTO WA_T8JVM01.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_T8JVM01-IR_YEAR, sy-vline,
  WA_T8JVM01-IR_DOC, sy-vline,
  WA_T8JVM01-IR_LINE, sy-vline,
  WA_T8JVM01-IR_QUANT, sy-vline,
  WA_T8JVM01-IR_REMAIN_QUANT, sy-vline,
  WA_T8JVM01-QUANTITY_MATCHED, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_T8JVM01 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_T8JVM01 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_T8JVM01 INTO WA_T8JVM01.


*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 GJAHR, internal->external for field GR_YEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_T8JVM01-GR_YEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_T8JVM01-GR_YEAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field GR_DOC
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_T8JVM01-GR_DOC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_T8JVM01-GR_DOC.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field IR_YEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_T8JVM01-IR_YEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_T8JVM01-IR_YEAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field IR_DOC
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_T8JVM01-IR_DOC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_T8JVM01-IR_DOC.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_T8JVM01-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_T8JVM01-MEINS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field REF_GR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_T8JVM01-REF_GR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_T8JVM01-REF_GR.
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_T8JVM01_STR, 
GR_YEAR TYPE STRING,
GR_DOC TYPE STRING,
GR_LINE TYPE STRING,
GR_QUANT TYPE STRING,
GR_REMAIN_QUANT TYPE STRING,
IR_YEAR TYPE STRING,
IR_DOC TYPE STRING,
IR_LINE TYPE STRING,
IR_QUANT TYPE STRING,
IR_REMAIN_QUANT TYPE STRING,
QUANTITY_MATCHED TYPE STRING,
MEINS TYPE STRING,
REF_GR TYPE STRING,
REF_GR_LINE TYPE STRING,
WRBTR TYPE STRING,
WAERS TYPE STRING,
SHKZG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_T8JVM01_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_T8JVM01_STR-GR_YEAR sy-vline 
WA_T8JVM01_STR-GR_DOC sy-vline 
WA_T8JVM01_STR-GR_LINE sy-vline 
WA_T8JVM01_STR-GR_QUANT sy-vline 
WA_T8JVM01_STR-GR_REMAIN_QUANT sy-vline 
WA_T8JVM01_STR-IR_YEAR sy-vline 
WA_T8JVM01_STR-IR_DOC sy-vline 
WA_T8JVM01_STR-IR_LINE sy-vline 
WA_T8JVM01_STR-IR_QUANT sy-vline 
WA_T8JVM01_STR-IR_REMAIN_QUANT sy-vline 
WA_T8JVM01_STR-QUANTITY_MATCHED sy-vline 
WA_T8JVM01_STR-MEINS sy-vline 
WA_T8JVM01_STR-REF_GR sy-vline 
WA_T8JVM01_STR-REF_GR_LINE sy-vline 
WA_T8JVM01_STR-WRBTR sy-vline 
WA_T8JVM01_STR-WAERS sy-vline 
WA_T8JVM01_STR-SHKZG sy-vline      INTO ld_text SEPARATED BY SPACE.

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