ABAP Select data from SAP table J_2ICOMP into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP J_2ICOMP 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 J_2ICOMP. 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 J_2ICOMP 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_J_2ICOMP TYPE STANDARD TABLE OF J_2ICOMP,
      WA_J_2ICOMP TYPE J_2ICOMP,
      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: <J_2ICOMP> TYPE J_2ICOMP.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_J_2ICOMP.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM J_2ICOMP
  INTO TABLE IT_J_2ICOMP.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM J_2ICOMP
*  INTO TABLE @DATA(IT_J_2ICOMP2).
*--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_J_2ICOMP INDEX 1 INTO DATA(WA_J_2ICOMP2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_J_2ICOMP ASSIGNING <J_2ICOMP>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<J_2ICOMP>-DOCNO = 1.
<J_2ICOMP>-TOTAL1 = 1.
<J_2ICOMP>-TOTAL2 = 1.
<J_2ICOMP>-TOTAL3 = 1.
<J_2ICOMP>-TOTAL4 = 1.

ENDLOOP.

LOOP AT IT_J_2ICOMP INTO WA_J_2ICOMP.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_J_2ICOMP-TOTAL5, sy-vline,
  WA_J_2ICOMP-NAME, sy-vline,
  WA_J_2ICOMP-NAME1, sy-vline,
  WA_J_2ICOMP-NAME3, sy-vline,
  WA_J_2ICOMP-NAME4, sy-vline,
  WA_J_2ICOMP-ADDRESS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_J_2ICOMP 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_J_2ICOMP 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_J_2ICOMP INTO WA_J_2ICOMP.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_J_2ICOMP_STR, 
DOCNO TYPE STRING,
TOTAL1 TYPE STRING,
TOTAL2 TYPE STRING,
TOTAL3 TYPE STRING,
TOTAL4 TYPE STRING,
TOTAL5 TYPE STRING,
NAME TYPE STRING,
NAME1 TYPE STRING,
NAME3 TYPE STRING,
NAME4 TYPE STRING,
ADDRESS TYPE STRING,
ADDRESS1 TYPE STRING,
AMOUNT1 TYPE STRING,
AMOUNT2 TYPE STRING,
AMOUNT3 TYPE STRING,
AMOUNT4 TYPE STRING,
AMOUNT5 TYPE STRING,
AMOUNT6 TYPE STRING,
AMOUNT7 TYPE STRING,
EXNUM_CR TYPE STRING,
EXDAT_CR TYPE STRING,
EXCVD_CR TYPE STRING,
EXBED_CR TYPE STRING,
EXSED_CR TYPE STRING,
EXAED_CR TYPE STRING,
CESS_CR TYPE STRING,
NCCD_CR TYPE STRING,
ECS_CR TYPE STRING,
EXNUM_DR TYPE STRING,
EXDAT_DR TYPE STRING,
EXBED_DR TYPE STRING,
EXSED_DR TYPE STRING,
EXAED_DR TYPE STRING,
CESS_DR TYPE STRING,
NCCD_DR TYPE STRING,
ECS_DR TYPE STRING,
VRFYDT TYPE STRING,
STDT TYPE STRING,
START_DT TYPE STRING,
END_DT TYPE STRING,
AR_NUM TYPE STRING,
AR_DT TYPE STRING,
EXCCD_DR TYPE STRING,
OP_BAL1 TYPE STRING,
OP_BAL2 TYPE STRING,
OP_BAL3 TYPE STRING,
OP_BAL4 TYPE STRING,
OP_BAL5 TYPE STRING,
OP_BAL6 TYPE STRING,
CHAPID1 TYPE STRING,
IDENTI TYPE STRING,
BED_MISCDR TYPE STRING,
BED_MISCCR TYPE STRING,
BEDRATE_R TYPE STRING,
AEDRATE_R TYPE STRING,
SEDRATE_R TYPE STRING,
BEDRATE_I TYPE STRING,
AEDRATE_I TYPE STRING,
SEDRATE_I TYPE STRING,
NCCDRATE_I TYPE STRING,
ECSRATE_I TYPE STRING,
EXCRG1 TYPE STRING,
EXCDI1 TYPE STRING,
EXCCO1 TYPE STRING,
MENGE1 TYPE STRING,
WORD1 TYPE STRING,
DECWORD1 TYPE STRING,
WORD2 TYPE STRING,
DECWORD2 TYPE STRING,
WORD3 TYPE STRING,
DECWORD3 TYPE STRING,
NEW_PAGE TYPE STRING,
RG1_P_L TYPE STRING,
STDATE TYPE STRING,
ENDATE TYPE STRING,
OP_QTY TYPE STRING,
MF_QTY TYPE STRING,
TO_QTY TYPE STRING,
CL_FIN TYPE STRING,
CL_BON TYPE STRING,
REMARKS TYPE STRING,
H_MENGE TYPE STRING,
H_VALUE TYPE STRING,
E_MENGE TYPE STRING,
E_VALUE TYPE STRING,
E_MENGE_BN TYPE STRING,
O_MENGE TYPE STRING,
O_PURPOSE TYPE STRING,
O_PUR_MENG TYPE STRING,
QTYCLRDUTY TYPE STRING,
QTYCLRFREE TYPE STRING,
QTYCLRTOT TYPE STRING,
PLA_AMT TYPE STRING,
RG23A_AMT TYPE STRING,
RG23C_AMT TYPE STRING,
57CC_PLA_A TYPE STRING,
57CC_RG23A TYPE STRING,
57CC_RG23C TYPE STRING,
57F4_PLA_A TYPE STRING,
57F4_RG23A TYPE STRING,
57F4_RG23C TYPE STRING,
EXCCD TYPE STRING,
EXCRG TYPE STRING,
EXCDI TYPE STRING,
ORT01 TYPE STRING,
EXNUM2 TYPE STRING,
EXCRG2 TYPE STRING,
EXCDI2 TYPE STRING,
RULES TYPE STRING,
EXCCO2 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_J_2ICOMP_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_J_2ICOMP_STR-DOCNO sy-vline 
WA_J_2ICOMP_STR-TOTAL1 sy-vline 
WA_J_2ICOMP_STR-TOTAL2 sy-vline 
WA_J_2ICOMP_STR-TOTAL3 sy-vline 
WA_J_2ICOMP_STR-TOTAL4 sy-vline 
WA_J_2ICOMP_STR-TOTAL5 sy-vline 
WA_J_2ICOMP_STR-NAME sy-vline 
WA_J_2ICOMP_STR-NAME1 sy-vline 
WA_J_2ICOMP_STR-NAME3 sy-vline 
WA_J_2ICOMP_STR-NAME4 sy-vline 
WA_J_2ICOMP_STR-ADDRESS sy-vline 
WA_J_2ICOMP_STR-ADDRESS1 sy-vline 
WA_J_2ICOMP_STR-AMOUNT1 sy-vline 
WA_J_2ICOMP_STR-AMOUNT2 sy-vline 
WA_J_2ICOMP_STR-AMOUNT3 sy-vline 
WA_J_2ICOMP_STR-AMOUNT4 sy-vline 
WA_J_2ICOMP_STR-AMOUNT5 sy-vline 
WA_J_2ICOMP_STR-AMOUNT6 sy-vline 
WA_J_2ICOMP_STR-AMOUNT7 sy-vline 
WA_J_2ICOMP_STR-EXNUM_CR sy-vline 
WA_J_2ICOMP_STR-EXDAT_CR sy-vline 
WA_J_2ICOMP_STR-EXCVD_CR sy-vline 
WA_J_2ICOMP_STR-EXBED_CR sy-vline 
WA_J_2ICOMP_STR-EXSED_CR sy-vline 
WA_J_2ICOMP_STR-EXAED_CR sy-vline 
WA_J_2ICOMP_STR-CESS_CR sy-vline 
WA_J_2ICOMP_STR-NCCD_CR sy-vline 
WA_J_2ICOMP_STR-ECS_CR sy-vline 
WA_J_2ICOMP_STR-EXNUM_DR sy-vline 
WA_J_2ICOMP_STR-EXDAT_DR sy-vline 
WA_J_2ICOMP_STR-EXBED_DR sy-vline 
WA_J_2ICOMP_STR-EXSED_DR sy-vline 
WA_J_2ICOMP_STR-EXAED_DR sy-vline 
WA_J_2ICOMP_STR-CESS_DR sy-vline 
WA_J_2ICOMP_STR-NCCD_DR sy-vline 
WA_J_2ICOMP_STR-ECS_DR sy-vline 
WA_J_2ICOMP_STR-VRFYDT sy-vline 
WA_J_2ICOMP_STR-STDT sy-vline 
WA_J_2ICOMP_STR-START_DT sy-vline 
WA_J_2ICOMP_STR-END_DT sy-vline 
WA_J_2ICOMP_STR-AR_NUM sy-vline 
WA_J_2ICOMP_STR-AR_DT sy-vline 
WA_J_2ICOMP_STR-EXCCD_DR sy-vline 
WA_J_2ICOMP_STR-OP_BAL1 sy-vline 
WA_J_2ICOMP_STR-OP_BAL2 sy-vline 
WA_J_2ICOMP_STR-OP_BAL3 sy-vline 
WA_J_2ICOMP_STR-OP_BAL4 sy-vline 
WA_J_2ICOMP_STR-OP_BAL5 sy-vline 
WA_J_2ICOMP_STR-OP_BAL6 sy-vline 
WA_J_2ICOMP_STR-CHAPID1 sy-vline 
WA_J_2ICOMP_STR-IDENTI sy-vline 
WA_J_2ICOMP_STR-BED_MISCDR sy-vline 
WA_J_2ICOMP_STR-BED_MISCCR sy-vline 
WA_J_2ICOMP_STR-BEDRATE_R sy-vline 
WA_J_2ICOMP_STR-AEDRATE_R sy-vline 
WA_J_2ICOMP_STR-SEDRATE_R sy-vline 
WA_J_2ICOMP_STR-BEDRATE_I sy-vline 
WA_J_2ICOMP_STR-AEDRATE_I sy-vline 
WA_J_2ICOMP_STR-SEDRATE_I sy-vline 
WA_J_2ICOMP_STR-NCCDRATE_I sy-vline 
WA_J_2ICOMP_STR-ECSRATE_I sy-vline 
WA_J_2ICOMP_STR-EXCRG1 sy-vline 
WA_J_2ICOMP_STR-EXCDI1 sy-vline 
WA_J_2ICOMP_STR-EXCCO1 sy-vline 
WA_J_2ICOMP_STR-MENGE1 sy-vline 
WA_J_2ICOMP_STR-WORD1 sy-vline 
WA_J_2ICOMP_STR-DECWORD1 sy-vline 
WA_J_2ICOMP_STR-WORD2 sy-vline 
WA_J_2ICOMP_STR-DECWORD2 sy-vline 
WA_J_2ICOMP_STR-WORD3 sy-vline 
WA_J_2ICOMP_STR-DECWORD3 sy-vline 
WA_J_2ICOMP_STR-NEW_PAGE sy-vline 
WA_J_2ICOMP_STR-RG1_P_L sy-vline 
WA_J_2ICOMP_STR-STDATE sy-vline 
WA_J_2ICOMP_STR-ENDATE sy-vline 
WA_J_2ICOMP_STR-OP_QTY sy-vline 
WA_J_2ICOMP_STR-MF_QTY sy-vline 
WA_J_2ICOMP_STR-TO_QTY sy-vline 
WA_J_2ICOMP_STR-CL_FIN sy-vline 
WA_J_2ICOMP_STR-CL_BON sy-vline 
WA_J_2ICOMP_STR-REMARKS sy-vline 
WA_J_2ICOMP_STR-H_MENGE sy-vline 
WA_J_2ICOMP_STR-H_VALUE sy-vline 
WA_J_2ICOMP_STR-E_MENGE sy-vline 
WA_J_2ICOMP_STR-E_VALUE sy-vline 
WA_J_2ICOMP_STR-E_MENGE_BN sy-vline 
WA_J_2ICOMP_STR-O_MENGE sy-vline 
WA_J_2ICOMP_STR-O_PURPOSE sy-vline 
WA_J_2ICOMP_STR-O_PUR_MENG sy-vline 
WA_J_2ICOMP_STR-QTYCLRDUTY sy-vline 
WA_J_2ICOMP_STR-QTYCLRFREE sy-vline 
WA_J_2ICOMP_STR-QTYCLRTOT sy-vline 
WA_J_2ICOMP_STR-PLA_AMT sy-vline 
WA_J_2ICOMP_STR-RG23A_AMT sy-vline 
WA_J_2ICOMP_STR-RG23C_AMT sy-vline 
WA_J_2ICOMP_STR-57CC_PLA_A sy-vline 
WA_J_2ICOMP_STR-57CC_RG23A sy-vline 
WA_J_2ICOMP_STR-57CC_RG23C sy-vline 
WA_J_2ICOMP_STR-57F4_PLA_A sy-vline 
WA_J_2ICOMP_STR-57F4_RG23A sy-vline 
WA_J_2ICOMP_STR-57F4_RG23C sy-vline 
WA_J_2ICOMP_STR-EXCCD sy-vline 
WA_J_2ICOMP_STR-EXCRG sy-vline 
WA_J_2ICOMP_STR-EXCDI sy-vline 
WA_J_2ICOMP_STR-ORT01 sy-vline 
WA_J_2ICOMP_STR-EXNUM2 sy-vline 
WA_J_2ICOMP_STR-EXCRG2 sy-vline 
WA_J_2ICOMP_STR-EXCDI2 sy-vline 
WA_J_2ICOMP_STR-RULES sy-vline 
WA_J_2ICOMP_STR-EXCCO2 sy-vline      INTO ld_text SEPARATED BY SPACE.

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