ABAP Select data from SAP table /KJCH1/SCH01 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /KJCH1/SCH01 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 /KJCH1/SCH01. 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 /KJCH1/SCH01 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_/KJCH1/SCH01 TYPE STANDARD TABLE OF /KJCH1/SCH01,
      WA_/KJCH1/SCH01 TYPE /KJCH1/SCH01,
      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: </KJCH1/SCH01> TYPE /KJCH1/SCH01.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_/KJCH1/SCH01.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /KJCH1/SCH01
  INTO TABLE IT_/KJCH1/SCH01.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /KJCH1/SCH01
*  INTO TABLE @DATA(IT_/KJCH1/SCH012).
*--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_/KJCH1/SCH01 INDEX 1 INTO DATA(WA_/KJCH1/SCH012).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/KJCH1/SCH01 ASSIGNING </KJCH1/SCH01>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</KJCH1/SCH01>-ROUTE = 1.
</KJCH1/SCH01>-ROUTETYPE = 1.
</KJCH1/SCH01>-VKORG = 1.
</KJCH1/SCH01>-VTWEG = 1.
</KJCH1/SCH01>-SPART = 1.

ENDLOOP.

LOOP AT IT_/KJCH1/SCH01 INTO WA_/KJCH1/SCH01.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/KJCH1/SCH01-KUNAG, sy-vline,
  WA_/KJCH1/SCH01-KUNNR6, sy-vline,
  WA_/KJCH1/SCH01-KUNRE, sy-vline,
  WA_/KJCH1/SCH01-KUNRG, sy-vline,
  WA_/KJCH1/SCH01-KUNWE, sy-vline,
  WA_/KJCH1/SCH01-KRCK, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/KJCH1/SCH01 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_/KJCH1/SCH01 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_/KJCH1/SCH01 INTO WA_/KJCH1/SCH01.


*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 ROUTE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/KJCH1/SCH01-ROUTE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/KJCH1/SCH01-ROUTE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KUNAG
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/KJCH1/SCH01-KUNAG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/KJCH1/SCH01-KUNAG.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KUNNR6
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/KJCH1/SCH01-KUNNR6
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/KJCH1/SCH01-KUNNR6.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KUNRE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/KJCH1/SCH01-KUNRE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/KJCH1/SCH01-KUNRE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KUNRG
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/KJCH1/SCH01-KUNRG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/KJCH1/SCH01-KUNRG.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KUNWE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/KJCH1/SCH01-KUNWE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/KJCH1/SCH01-KUNWE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RROUTE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/KJCH1/SCH01-RROUTE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/KJCH1/SCH01-RROUTE.
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_/KJCH1/SCH01_STR, 
ROUTE TYPE STRING,
ROUTETYPE TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,
SPART TYPE STRING,
KUNAG TYPE STRING,
KUNNR6 TYPE STRING,
KUNRE TYPE STRING,
KUNRG TYPE STRING,
KUNWE TYPE STRING,
KRCK TYPE STRING,
RSTATUST TYPE STRING,
ROUTET_L TYPE STRING,
ROUTET_LTAB TYPE STRING,
RROUTET_S TYPE STRING,
ERNAM TYPE STRING,
ERDAT TYPE STRING,
ERZET TYPE STRING,
AENAM TYPE STRING,
AEDAT TYPE STRING,
AEZET TYPE STRING,
RROUTE TYPE STRING,
ROUTETYPET TYPE STRING,
ROUTET_S TYPE STRING,
TXT_VTRBER TYPE STRING,
KUNAGT TYPE STRING,
KUNRET TYPE STRING,
KUNRGT TYPE STRING,
KUNWET TYPE STRING,
KRCKT TYPE STRING,
RGP1 TYPE STRING,
RGP2 TYPE STRING,
RGP1T TYPE STRING,
RGP2T TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/KJCH1/SCH01_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_/KJCH1/SCH01_STR-ROUTE sy-vline 
WA_/KJCH1/SCH01_STR-ROUTETYPE sy-vline 
WA_/KJCH1/SCH01_STR-VKORG sy-vline 
WA_/KJCH1/SCH01_STR-VTWEG sy-vline 
WA_/KJCH1/SCH01_STR-SPART sy-vline 
WA_/KJCH1/SCH01_STR-KUNAG sy-vline 
WA_/KJCH1/SCH01_STR-KUNNR6 sy-vline 
WA_/KJCH1/SCH01_STR-KUNRE sy-vline 
WA_/KJCH1/SCH01_STR-KUNRG sy-vline 
WA_/KJCH1/SCH01_STR-KUNWE sy-vline 
WA_/KJCH1/SCH01_STR-KRCK sy-vline 
WA_/KJCH1/SCH01_STR-RSTATUST sy-vline 
WA_/KJCH1/SCH01_STR-ROUTET_L sy-vline 
WA_/KJCH1/SCH01_STR-ROUTET_LTAB sy-vline 
WA_/KJCH1/SCH01_STR-RROUTET_S sy-vline 
WA_/KJCH1/SCH01_STR-ERNAM sy-vline 
WA_/KJCH1/SCH01_STR-ERDAT sy-vline 
WA_/KJCH1/SCH01_STR-ERZET sy-vline 
WA_/KJCH1/SCH01_STR-AENAM sy-vline 
WA_/KJCH1/SCH01_STR-AEDAT sy-vline 
WA_/KJCH1/SCH01_STR-AEZET sy-vline 
WA_/KJCH1/SCH01_STR-RROUTE sy-vline 
WA_/KJCH1/SCH01_STR-ROUTETYPET sy-vline 
WA_/KJCH1/SCH01_STR-ROUTET_S sy-vline 
WA_/KJCH1/SCH01_STR-TXT_VTRBER sy-vline 
WA_/KJCH1/SCH01_STR-KUNAGT sy-vline 
WA_/KJCH1/SCH01_STR-KUNRET sy-vline 
WA_/KJCH1/SCH01_STR-KUNRGT sy-vline 
WA_/KJCH1/SCH01_STR-KUNWET sy-vline 
WA_/KJCH1/SCH01_STR-KRCKT sy-vline 
WA_/KJCH1/SCH01_STR-RGP1 sy-vline 
WA_/KJCH1/SCH01_STR-RGP2 sy-vline 
WA_/KJCH1/SCH01_STR-RGP1T sy-vline 
WA_/KJCH1/SCH01_STR-RGP2T sy-vline      INTO ld_text SEPARATED BY SPACE.

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