ABAP Select data from SAP table REXC_AJSPECIFIC_CH01 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP REXC_AJSPECIFIC_CH01 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 REXC_AJSPECIFIC_CH01. 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 REXC_AJSPECIFIC_CH01 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_REXC_AJSPECIFIC_CH01 TYPE STANDARD TABLE OF REXC_AJSPECIFIC_CH01,
      WA_REXC_AJSPECIFIC_CH01 TYPE REXC_AJSPECIFIC_CH01,
      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: <REXC_AJSPECIFIC_CH01> TYPE REXC_AJSPECIFIC_CH01.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_REXC_AJSPECIFIC_CH01.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM REXC_AJSPECIFIC_CH01
  INTO TABLE IT_REXC_AJSPECIFIC_CH01.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM REXC_AJSPECIFIC_CH01
*  INTO TABLE @DATA(IT_REXC_AJSPECIFIC_CH012).
*--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_REXC_AJSPECIFIC_CH01 INDEX 1 INTO DATA(WA_REXC_AJSPECIFIC_CH012).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_REXC_AJSPECIFIC_CH01 ASSIGNING <REXC_AJSPECIFIC_CH01>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<REXC_AJSPECIFIC_CH01>-MANDT = 1.
<REXC_AJSPECIFIC_CH01>-INTRENO = 1.
<REXC_AJSPECIFIC_CH01>-TERMNO = 1.
<REXC_AJSPECIFIC_CH01>-ADJMRULE = 1.
<REXC_AJSPECIFIC_CH01>-ADJMSUBRULE = 1.

ENDLOOP.

LOOP AT IT_REXC_AJSPECIFIC_CH01 INTO WA_REXC_AJSPECIFIC_CH01.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_REXC_AJSPECIFIC_CH01-VALIDFROM, sy-vline,
  WA_REXC_AJSPECIFIC_CH01-VALIDTO, sy-vline,
  WA_REXC_AJSPECIFIC_CH01-RULECHANGEABLE, sy-vline,
  WA_REXC_AJSPECIFIC_CH01-RULEEXPAND, sy-vline,
  WA_REXC_AJSPECIFIC_CH01-MGRBASEREF, sy-vline,
  WA_REXC_AJSPECIFIC_CH01-MOCPERCENTTYPE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_REXC_AJSPECIFIC_CH01 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_REXC_AJSPECIFIC_CH01 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_REXC_AJSPECIFIC_CH01 INTO WA_REXC_AJSPECIFIC_CH01.


*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 TERMNO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REXC_AJSPECIFIC_CH01-TERMNO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REXC_AJSPECIFIC_CH01-TERMNO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ADJMRULE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REXC_AJSPECIFIC_CH01-ADJMRULE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REXC_AJSPECIFIC_CH01-ADJMRULE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ADJMSUBRULE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REXC_AJSPECIFIC_CH01-ADJMSUBRULE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REXC_AJSPECIFIC_CH01-ADJMSUBRULE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit REDAT, internal->external for field VALIDTO
CALL FUNCTION 'CONVERSION_EXIT_REDAT_OUTPUT'
  EXPORTING
    input =                      WA_REXC_AJSPECIFIC_CH01-VALIDTO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REXC_AJSPECIFIC_CH01-VALIDTO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit DEC03, internal->external for field MOCBASEINDX
CALL FUNCTION 'CONVERSION_EXIT_DEC03_OUTPUT'
  EXPORTING
    input =                      WA_REXC_AJSPECIFIC_CH01-MOCBASEINDX
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REXC_AJSPECIFIC_CH01-MOCBASEINDX.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field PPCBASEYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_REXC_AJSPECIFIC_CH01-PPCBASEYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REXC_AJSPECIFIC_CH01-PPCBASEYEAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field CONDGRPBASISRENT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REXC_AJSPECIFIC_CH01-CONDGRPBASISRENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REXC_AJSPECIFIC_CH01-CONDGRPBASISRENT.
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_REXC_AJSPECIFIC_CH01_STR, 
MANDT TYPE STRING,
INTRENO TYPE STRING,
TERMNO TYPE STRING,
ADJMRULE TYPE STRING,
ADJMSUBRULE TYPE STRING,
VALIDFROM TYPE STRING,
VALIDTO TYPE STRING,
RULECHANGEABLE TYPE STRING,
RULEEXPAND TYPE STRING,
MGRBASEREF TYPE STRING,
MOCPERCENTTYPE TYPE STRING,
MOCBASEINDX TYPE STRING,
PPCBASESERIES TYPE STRING,
PPCBASEYEAR TYPE STRING,
PPCPRCTPASS TYPE STRING,
FMGRBASEREF TYPE STRING,
FMOCPERCENTTYPE TYPE STRING,
FMOCBASEINDX TYPE STRING,
FPPCBASESERIES TYPE STRING,
FPPCBASEYEAR TYPE STRING,
ABSCDPPEXTACCOM TYPE STRING,
ABSCDPPEXTYIELD TYPE STRING,
ABSCDPPEXTWOIIN TYPE STRING,
CONDGRPBASISRENT TYPE STRING,
ABSCONTRIBUTION TYPE STRING,
SPECIFICFIELD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_REXC_AJSPECIFIC_CH01_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_REXC_AJSPECIFIC_CH01_STR-MANDT sy-vline 
WA_REXC_AJSPECIFIC_CH01_STR-INTRENO sy-vline 
WA_REXC_AJSPECIFIC_CH01_STR-TERMNO sy-vline 
WA_REXC_AJSPECIFIC_CH01_STR-ADJMRULE sy-vline 
WA_REXC_AJSPECIFIC_CH01_STR-ADJMSUBRULE sy-vline 
WA_REXC_AJSPECIFIC_CH01_STR-VALIDFROM sy-vline 
WA_REXC_AJSPECIFIC_CH01_STR-VALIDTO sy-vline 
WA_REXC_AJSPECIFIC_CH01_STR-RULECHANGEABLE sy-vline 
WA_REXC_AJSPECIFIC_CH01_STR-RULEEXPAND sy-vline 
WA_REXC_AJSPECIFIC_CH01_STR-MGRBASEREF sy-vline 
WA_REXC_AJSPECIFIC_CH01_STR-MOCPERCENTTYPE sy-vline 
WA_REXC_AJSPECIFIC_CH01_STR-MOCBASEINDX sy-vline 
WA_REXC_AJSPECIFIC_CH01_STR-PPCBASESERIES sy-vline 
WA_REXC_AJSPECIFIC_CH01_STR-PPCBASEYEAR sy-vline 
WA_REXC_AJSPECIFIC_CH01_STR-PPCPRCTPASS sy-vline 
WA_REXC_AJSPECIFIC_CH01_STR-FMGRBASEREF sy-vline 
WA_REXC_AJSPECIFIC_CH01_STR-FMOCPERCENTTYPE sy-vline 
WA_REXC_AJSPECIFIC_CH01_STR-FMOCBASEINDX sy-vline 
WA_REXC_AJSPECIFIC_CH01_STR-FPPCBASESERIES sy-vline 
WA_REXC_AJSPECIFIC_CH01_STR-FPPCBASEYEAR sy-vline 
WA_REXC_AJSPECIFIC_CH01_STR-ABSCDPPEXTACCOM sy-vline 
WA_REXC_AJSPECIFIC_CH01_STR-ABSCDPPEXTYIELD sy-vline 
WA_REXC_AJSPECIFIC_CH01_STR-ABSCDPPEXTWOIIN sy-vline 
WA_REXC_AJSPECIFIC_CH01_STR-CONDGRPBASISRENT sy-vline 
WA_REXC_AJSPECIFIC_CH01_STR-ABSCONTRIBUTION sy-vline 
WA_REXC_AJSPECIFIC_CH01_STR-SPECIFICFIELD sy-vline      INTO ld_text SEPARATED BY SPACE.

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