ABAP Select data from SAP table JVS1 into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP JVS1 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 JVS1. 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 JVS1 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_JVS1 TYPE STANDARD TABLE OF JVS1,
      WA_JVS1 TYPE JVS1,
      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: <JVS1> TYPE JVS1.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_JVS1.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM JVS1
  INTO TABLE IT_JVS1.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM JVS1
*  INTO TABLE @DATA(IT_JVS12).
*--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_JVS1 INDEX 1 INTO DATA(WA_JVS12).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_JVS1 ASSIGNING <JVS1>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<JVS1>-RCLNT = 1.
<JVS1>-RLDNR = 1.
<JVS1>-RRCTY = 1.
<JVS1>-RVERS = 1.
<JVS1>-BUKRS = 1.

ENDLOOP.

LOOP AT IT_JVS1 INTO WA_JVS1.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_JVS1-RYEAR, sy-vline,
  WA_JVS1-JVNAM, sy-vline,
  WA_JVS1-EGROU, sy-vline,
  WA_JVS1-RACCT, sy-vline,
  WA_JVS1-RCNTR, sy-vline,
  WA_JVS1-ORDNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_JVS1 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_JVS1 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_JVS1 INTO WA_JVS1.


*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 RLDNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_JVS1-RLDNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_JVS1-RLDNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RVERS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_JVS1-RVERS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_JVS1-RVERS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field RYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_JVS1-RYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_JVS1-RYEAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field JVNAM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_JVS1-JVNAM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_JVS1-JVNAM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field EGROU
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_JVS1-EGROU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_JVS1-EGROU.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RACCT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_JVS1-RACCT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_JVS1-RACCT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RCNTR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_JVS1-RCNTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_JVS1-RCNTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ORDNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_JVS1-ORDNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_JVS1-ORDNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RECIN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_JVS1-RECIN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_JVS1-RECIN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PARTN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_JVS1-PARTN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_JVS1-PARTN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field RUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_JVS1-RUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_JVS1-RUNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field DOCNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_JVS1-DOCNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_JVS1-DOCNR.
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_JVS1_STR, 
RCLNT TYPE STRING,
RLDNR TYPE STRING,
RRCTY TYPE STRING,
RVERS TYPE STRING,
BUKRS TYPE STRING,
RYEAR TYPE STRING,
JVNAM TYPE STRING,
EGROU TYPE STRING,
RACCT TYPE STRING,
RCNTR TYPE STRING,
ORDNR TYPE STRING,
RECIN TYPE STRING,
PARTN TYPE STRING,
RTCUR TYPE STRING,
RUNIT TYPE STRING,
POPER TYPE STRING,
DOCCT TYPE STRING,
DOCNR TYPE STRING,
DOCLN TYPE STRING,
JVSPL TYPE STRING,
CPUDT TYPE STRING,
CPUTM TYPE STRING,
USNAM TYPE STRING,
TSL TYPE STRING,
HSL TYPE STRING,
KSL TYPE STRING,
MSL TYPE STRING,
SGTXT TYPE STRING,
AUTOM TYPE STRING,
DOCTY TYPE STRING,
ACTIV TYPE STRING,
BVORG TYPE STRING,
KOKRS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_JVS1_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_JVS1_STR-RCLNT sy-vline 
WA_JVS1_STR-RLDNR sy-vline 
WA_JVS1_STR-RRCTY sy-vline 
WA_JVS1_STR-RVERS sy-vline 
WA_JVS1_STR-BUKRS sy-vline 
WA_JVS1_STR-RYEAR sy-vline 
WA_JVS1_STR-JVNAM sy-vline 
WA_JVS1_STR-EGROU sy-vline 
WA_JVS1_STR-RACCT sy-vline 
WA_JVS1_STR-RCNTR sy-vline 
WA_JVS1_STR-ORDNR sy-vline 
WA_JVS1_STR-RECIN sy-vline 
WA_JVS1_STR-PARTN sy-vline 
WA_JVS1_STR-RTCUR sy-vline 
WA_JVS1_STR-RUNIT sy-vline 
WA_JVS1_STR-POPER sy-vline 
WA_JVS1_STR-DOCCT sy-vline 
WA_JVS1_STR-DOCNR sy-vline 
WA_JVS1_STR-DOCLN sy-vline 
WA_JVS1_STR-JVSPL sy-vline 
WA_JVS1_STR-CPUDT sy-vline 
WA_JVS1_STR-CPUTM sy-vline 
WA_JVS1_STR-USNAM sy-vline 
WA_JVS1_STR-TSL sy-vline 
WA_JVS1_STR-HSL sy-vline 
WA_JVS1_STR-KSL sy-vline 
WA_JVS1_STR-MSL sy-vline 
WA_JVS1_STR-SGTXT sy-vline 
WA_JVS1_STR-AUTOM sy-vline 
WA_JVS1_STR-DOCTY sy-vline 
WA_JVS1_STR-ACTIV sy-vline 
WA_JVS1_STR-BVORG sy-vline 
WA_JVS1_STR-KOKRS sy-vline      INTO ld_text SEPARATED BY SPACE.

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