ABAP Select data from SAP table NJIT_PURCH_SA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM NJIT_PURCH_SA
*  INTO TABLE @DATA(IT_NJIT_PURCH_SA2).
*--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_NJIT_PURCH_SA INDEX 1 INTO DATA(WA_NJIT_PURCH_SA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<NJIT_PURCH_SA>-MANDT = 1.
<NJIT_PURCH_SA>-DB_KEY = 1.
<NJIT_PURCH_SA>-PARENT_KEY = 1.
<NJIT_PURCH_SA>-JITCONTROLCYCLE = 1.
<NJIT_PURCH_SA>-PRODUCTIONSUPPLYAREA = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_NJIT_PURCH_SA-MATERIAL, sy-vline,
  WA_NJIT_PURCH_SA-PLANT, sy-vline,
  WA_NJIT_PURCH_SA-JITOUTBSCHEDGAGRMTSUPPLIER, sy-vline,
  WA_NJIT_PURCH_SA-STORAGELOCATION, sy-vline,
  WA_NJIT_PURCH_SA-SCHEDULINGAGREEMENT, sy-vline,
  WA_NJIT_PURCH_SA-SCHEDULINGAGREEMENTITEM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_NJIT_PURCH_SA 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_NJIT_PURCH_SA 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_NJIT_PURCH_SA INTO WA_NJIT_PURCH_SA.


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

*Conversion exit MATN1, internal->external for field MATERIAL
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_NJIT_PURCH_SA-MATERIAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_NJIT_PURCH_SA-MATERIAL.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field SCHEDULINGAGREEMENT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_NJIT_PURCH_SA-SCHEDULINGAGREEMENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_NJIT_PURCH_SA-SCHEDULINGAGREEMENT.
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_NJIT_PURCH_SA_STR, 
MANDT TYPE STRING,
DB_KEY TYPE STRING,
PARENT_KEY TYPE STRING,
JITCONTROLCYCLE TYPE STRING,
PRODUCTIONSUPPLYAREA TYPE STRING,
MATERIAL TYPE STRING,
PLANT TYPE STRING,
JITOUTBSCHEDGAGRMTSUPPLIER TYPE STRING,
STORAGELOCATION TYPE STRING,
SCHEDULINGAGREEMENT TYPE STRING,
SCHEDULINGAGREEMENTITEM TYPE STRING,
JITOUTBSCHEDGAGRMTSTATUS TYPE STRING,
CREATED_BY_USER TYPE STRING,
CREATED_DATE_TIME TYPE STRING,
LAST_CHANGED_BY_USER TYPE STRING,
UPDATED_DATE_TIME TYPE STRING,
DUMMY_NJIT_CC_INCL_SCH_AGMT_PS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_NJIT_PURCH_SA_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_NJIT_PURCH_SA_STR-MANDT sy-vline 
WA_NJIT_PURCH_SA_STR-DB_KEY sy-vline 
WA_NJIT_PURCH_SA_STR-PARENT_KEY sy-vline 
WA_NJIT_PURCH_SA_STR-JITCONTROLCYCLE sy-vline 
WA_NJIT_PURCH_SA_STR-PRODUCTIONSUPPLYAREA sy-vline 
WA_NJIT_PURCH_SA_STR-MATERIAL sy-vline 
WA_NJIT_PURCH_SA_STR-PLANT sy-vline 
WA_NJIT_PURCH_SA_STR-JITOUTBSCHEDGAGRMTSUPPLIER sy-vline 
WA_NJIT_PURCH_SA_STR-STORAGELOCATION sy-vline 
WA_NJIT_PURCH_SA_STR-SCHEDULINGAGREEMENT sy-vline 
WA_NJIT_PURCH_SA_STR-SCHEDULINGAGREEMENTITEM sy-vline 
WA_NJIT_PURCH_SA_STR-JITOUTBSCHEDGAGRMTSTATUS sy-vline 
WA_NJIT_PURCH_SA_STR-CREATED_BY_USER sy-vline 
WA_NJIT_PURCH_SA_STR-CREATED_DATE_TIME sy-vline 
WA_NJIT_PURCH_SA_STR-LAST_CHANGED_BY_USER sy-vline 
WA_NJIT_PURCH_SA_STR-UPDATED_DATE_TIME sy-vline 
WA_NJIT_PURCH_SA_STR-DUMMY_NJIT_CC_INCL_SCH_AGMT_PS sy-vline      INTO ld_text SEPARATED BY SPACE.

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