ABAP Select data from SAP table CNEGR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CNEGR
*  INTO TABLE @DATA(IT_CNEGR2).
*--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_CNEGR INDEX 1 INTO DATA(WA_CNEGR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CNEGR>-GJAHR = 1.
<CNEGR>-PERIO = 1.
<CNEGR>-DATUV = 1.
<CNEGR>-DATUB = 1.
<CNEGR>-EARBEI = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CNEGR-EARBEH, sy-vline,
  WA_CNEGR-PARBEI, sy-vline,
  WA_CNEGR-PARBEH, sy-vline,
  WA_CNEGR-VARBEI, sy-vline,
  WA_CNEGR-VARBEH, sy-vline,
  WA_CNEGR-IARBEI, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CNEGR 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_CNEGR 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_CNEGR INTO WA_CNEGR.


*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 GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_CNEGR-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNEGR-GJAHR.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

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

*Conversion exit CUNIT, internal->external for field EV_PLAN_QUAN_ORG1_UNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CNEGR-EV_PLAN_QUAN_ORG1_UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNEGR-EV_PLAN_QUAN_ORG1_UNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field EV_ACT_QUAN_ORG1_UNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CNEGR-EV_ACT_QUAN_ORG1_UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNEGR-EV_ACT_QUAN_ORG1_UNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field EV_ACT_QUAN_CORR1_UNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CNEGR-EV_ACT_QUAN_CORR1_UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNEGR-EV_ACT_QUAN_CORR1_UNIT.
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_CNEGR_STR, 
GJAHR TYPE STRING,
PERIO TYPE STRING,
DATUV TYPE STRING,
DATUB TYPE STRING,
EARBEI TYPE STRING,
EARBEH TYPE STRING,
PARBEI TYPE STRING,
PARBEH TYPE STRING,
VARBEI TYPE STRING,
VARBEH TYPE STRING,
IARBEI TYPE STRING,
IARBEH TYPE STRING,
RARBEI TYPE STRING,
RARBEH TYPE STRING,
ABARBA TYPE STRING,
WAERS TYPE STRING,
MEINH TYPE STRING,
PROKSTPLAN TYPE STRING,
PROKSTPLN2 TYPE STRING,
AUFKSTPLAN TYPE STRING,
AUFKSTPLN2 TYPE STRING,
PROERLPLAN TYPE STRING,
PROERLPLN2 TYPE STRING,
AUFERLPLAN TYPE STRING,
AUFERLPLN2 TYPE STRING,
KREDFINPLN TYPE STRING,
DEBFINPLN TYPE STRING,
BUDGET TYPE STRING,
FREIGABE TYPE STRING,
AUFTRANF TYPE STRING,
FESTPROBL TYPE STRING,
KSTOBLGES TYPE STRING,
ISTKOSTEN TYPE STRING,
ISTERLOESE TYPE STRING,
KZHLNG TYPE STRING,
DZHLNG TYPE STRING,
PROKSTPLAN_OC TYPE STRING,
PROKSTPLN2_OC TYPE STRING,
AUFKSTPLAN_OC TYPE STRING,
AUFKSTPLN2_OC TYPE STRING,
PROERLPLAN_OC TYPE STRING,
PROERLPLN2_OC TYPE STRING,
AUFERLPLAN_OC TYPE STRING,
AUFERLPLN2_OC TYPE STRING,
KREDFINPLN_OC TYPE STRING,
DEBFINPLN_OC TYPE STRING,
BUDGET_OC TYPE STRING,
FREIGABE_OC TYPE STRING,
AUFTRANF_OC TYPE STRING,
FESTPROBL_OC TYPE STRING,
KSTOBLGES_OC TYPE STRING,
ISTKOSTEN_OC TYPE STRING,
ISTERLOESE_OC TYPE STRING,
KZHLNG_OC TYPE STRING,
DZHLNG_OC TYPE STRING,
EV_PLAN_ORG1 TYPE STRING,
EV_ACT_ORG1 TYPE STRING,
EV_ACT_CORR1 TYPE STRING,
EV_PLAN_QUAN_ORG1 TYPE STRING,
EV_PLAN_QUAN_ORG1_UNIT TYPE STRING,
EV_ACT_QUAN_ORG1 TYPE STRING,
EV_ACT_QUAN_ORG1_UNIT TYPE STRING,
EV_ACT_QUAN_CORR1 TYPE STRING,
EV_ACT_QUAN_CORR1_UNIT TYPE STRING,
POC_PLAN_ORG_AGG1 TYPE STRING,
POC_PLAN_ORG_NAGG1 TYPE STRING,
POC_ACT_ORG_AGG1 TYPE STRING,
POC_ACT_ORG_NAGG1 TYPE STRING,
POC_ACT_CORR_AGG1 TYPE STRING,
POC_ACT_CORR_NAGG1 TYPE STRING,
EV_COST_VAR_ORG TYPE STRING,
EV_SCHED_VAR_ORG TYPE STRING,
EV_COST_INDX_ORG TYPE STRING,
EV_SCHED_INDX_ORG TYPE STRING,
EV_COST_VAR_CORR TYPE STRING,
EV_SCHED_VAR_CORR TYPE STRING,
EV_COST_INDX_CORR TYPE STRING,
EV_SCHED_INDX_CORR TYPE STRING,
EV_PLAN_ORG1_OC TYPE STRING,
EV_ACT_ORG1_OC TYPE STRING,
EV_ACT_CORR1_OC TYPE STRING,
EV_COST_VAR_ORG_OC TYPE STRING,
EV_SCHED_VAR_ORG_OC TYPE STRING,
EV_SCHED_VAR_CORR_OC TYPE STRING,
EV_COST_VAR_CORR_OC TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CNEGR_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_CNEGR_STR-GJAHR sy-vline 
WA_CNEGR_STR-PERIO sy-vline 
WA_CNEGR_STR-DATUV sy-vline 
WA_CNEGR_STR-DATUB sy-vline 
WA_CNEGR_STR-EARBEI sy-vline 
WA_CNEGR_STR-EARBEH sy-vline 
WA_CNEGR_STR-PARBEI sy-vline 
WA_CNEGR_STR-PARBEH sy-vline 
WA_CNEGR_STR-VARBEI sy-vline 
WA_CNEGR_STR-VARBEH sy-vline 
WA_CNEGR_STR-IARBEI sy-vline 
WA_CNEGR_STR-IARBEH sy-vline 
WA_CNEGR_STR-RARBEI sy-vline 
WA_CNEGR_STR-RARBEH sy-vline 
WA_CNEGR_STR-ABARBA sy-vline 
WA_CNEGR_STR-WAERS sy-vline 
WA_CNEGR_STR-MEINH sy-vline 
WA_CNEGR_STR-PROKSTPLAN sy-vline 
WA_CNEGR_STR-PROKSTPLN2 sy-vline 
WA_CNEGR_STR-AUFKSTPLAN sy-vline 
WA_CNEGR_STR-AUFKSTPLN2 sy-vline 
WA_CNEGR_STR-PROERLPLAN sy-vline 
WA_CNEGR_STR-PROERLPLN2 sy-vline 
WA_CNEGR_STR-AUFERLPLAN sy-vline 
WA_CNEGR_STR-AUFERLPLN2 sy-vline 
WA_CNEGR_STR-KREDFINPLN sy-vline 
WA_CNEGR_STR-DEBFINPLN sy-vline 
WA_CNEGR_STR-BUDGET sy-vline 
WA_CNEGR_STR-FREIGABE sy-vline 
WA_CNEGR_STR-AUFTRANF sy-vline 
WA_CNEGR_STR-FESTPROBL sy-vline 
WA_CNEGR_STR-KSTOBLGES sy-vline 
WA_CNEGR_STR-ISTKOSTEN sy-vline 
WA_CNEGR_STR-ISTERLOESE sy-vline 
WA_CNEGR_STR-KZHLNG sy-vline 
WA_CNEGR_STR-DZHLNG sy-vline 
WA_CNEGR_STR-PROKSTPLAN_OC sy-vline 
WA_CNEGR_STR-PROKSTPLN2_OC sy-vline 
WA_CNEGR_STR-AUFKSTPLAN_OC sy-vline 
WA_CNEGR_STR-AUFKSTPLN2_OC sy-vline 
WA_CNEGR_STR-PROERLPLAN_OC sy-vline 
WA_CNEGR_STR-PROERLPLN2_OC sy-vline 
WA_CNEGR_STR-AUFERLPLAN_OC sy-vline 
WA_CNEGR_STR-AUFERLPLN2_OC sy-vline 
WA_CNEGR_STR-KREDFINPLN_OC sy-vline 
WA_CNEGR_STR-DEBFINPLN_OC sy-vline 
WA_CNEGR_STR-BUDGET_OC sy-vline 
WA_CNEGR_STR-FREIGABE_OC sy-vline 
WA_CNEGR_STR-AUFTRANF_OC sy-vline 
WA_CNEGR_STR-FESTPROBL_OC sy-vline 
WA_CNEGR_STR-KSTOBLGES_OC sy-vline 
WA_CNEGR_STR-ISTKOSTEN_OC sy-vline 
WA_CNEGR_STR-ISTERLOESE_OC sy-vline 
WA_CNEGR_STR-KZHLNG_OC sy-vline 
WA_CNEGR_STR-DZHLNG_OC sy-vline 
WA_CNEGR_STR-EV_PLAN_ORG1 sy-vline 
WA_CNEGR_STR-EV_ACT_ORG1 sy-vline 
WA_CNEGR_STR-EV_ACT_CORR1 sy-vline 
WA_CNEGR_STR-EV_PLAN_QUAN_ORG1 sy-vline 
WA_CNEGR_STR-EV_PLAN_QUAN_ORG1_UNIT sy-vline 
WA_CNEGR_STR-EV_ACT_QUAN_ORG1 sy-vline 
WA_CNEGR_STR-EV_ACT_QUAN_ORG1_UNIT sy-vline 
WA_CNEGR_STR-EV_ACT_QUAN_CORR1 sy-vline 
WA_CNEGR_STR-EV_ACT_QUAN_CORR1_UNIT sy-vline 
WA_CNEGR_STR-POC_PLAN_ORG_AGG1 sy-vline 
WA_CNEGR_STR-POC_PLAN_ORG_NAGG1 sy-vline 
WA_CNEGR_STR-POC_ACT_ORG_AGG1 sy-vline 
WA_CNEGR_STR-POC_ACT_ORG_NAGG1 sy-vline 
WA_CNEGR_STR-POC_ACT_CORR_AGG1 sy-vline 
WA_CNEGR_STR-POC_ACT_CORR_NAGG1 sy-vline 
WA_CNEGR_STR-EV_COST_VAR_ORG sy-vline 
WA_CNEGR_STR-EV_SCHED_VAR_ORG sy-vline 
WA_CNEGR_STR-EV_COST_INDX_ORG sy-vline 
WA_CNEGR_STR-EV_SCHED_INDX_ORG sy-vline 
WA_CNEGR_STR-EV_COST_VAR_CORR sy-vline 
WA_CNEGR_STR-EV_SCHED_VAR_CORR sy-vline 
WA_CNEGR_STR-EV_COST_INDX_CORR sy-vline 
WA_CNEGR_STR-EV_SCHED_INDX_CORR sy-vline 
WA_CNEGR_STR-EV_PLAN_ORG1_OC sy-vline 
WA_CNEGR_STR-EV_ACT_ORG1_OC sy-vline 
WA_CNEGR_STR-EV_ACT_CORR1_OC sy-vline 
WA_CNEGR_STR-EV_COST_VAR_ORG_OC sy-vline 
WA_CNEGR_STR-EV_SCHED_VAR_ORG_OC sy-vline 
WA_CNEGR_STR-EV_SCHED_VAR_CORR_OC sy-vline 
WA_CNEGR_STR-EV_COST_VAR_CORR_OC sy-vline      INTO ld_text SEPARATED BY SPACE.

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