ABAP Select data from SAP table H_REITTCNOA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM H_REITTCNOA
*  INTO TABLE @DATA(IT_H_REITTCNOA2).
*--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_H_REITTCNOA INDEX 1 INTO DATA(WA_H_REITTCNOA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<H_REITTCNOA>-MANDT = 1.
<H_REITTCNOA>-INTRENO = 1.
<H_REITTCNOA>-BUKRS = 1.
<H_REITTCNOA>-TCNO = 1.
<H_REITTCNOA>-OBJNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_H_REITTCNOA-RESPONSIBLE, sy-vline,
  WA_H_REITTCNOA-TCTYPE, sy-vline,
  WA_H_REITTCNOA-XTC, sy-vline,
  WA_H_REITTCNOA-TCSTATUS, sy-vline,
  WA_H_REITTCNOA-RERF, sy-vline,
  WA_H_REITTCNOA-DERF, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_H_REITTCNOA 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_H_REITTCNOA 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_H_REITTCNOA INTO WA_H_REITTCNOA.


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

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

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

*Conversion exit REDAT, internal->external for field SERVICEDATETO
CALL FUNCTION 'CONVERSION_EXIT_REDAT_OUTPUT'
  EXPORTING
    input =                      WA_H_REITTCNOA-SERVICEDATETO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_H_REITTCNOA-SERVICEDATETO.
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_H_REITTCNOA_STR, 
MANDT TYPE STRING,
INTRENO TYPE STRING,
BUKRS TYPE STRING,
TCNO TYPE STRING,
OBJNR TYPE STRING,
RESPONSIBLE TYPE STRING,
TCTYPE TYPE STRING,
XTC TYPE STRING,
TCSTATUS TYPE STRING,
RERF TYPE STRING,
DERF TYPE STRING,
TERF TYPE STRING,
REHER TYPE STRING,
RBEAR TYPE STRING,
DBEAR TYPE STRING,
TBEAR TYPE STRING,
RBHER TYPE STRING,
AUTHGRP TYPE STRING,
CORRDATEFROM TYPE STRING,
CORRDATETO TYPE STRING,
FIRSTUSEDATE TYPE STRING,
SERVICEDATEFROM TYPE STRING,
SERVICEDATETO TYPE STRING,
BASELOCK TYPE STRING,END OF T_EKKO_STR.
DATA: WA_H_REITTCNOA_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_H_REITTCNOA_STR-MANDT sy-vline 
WA_H_REITTCNOA_STR-INTRENO sy-vline 
WA_H_REITTCNOA_STR-BUKRS sy-vline 
WA_H_REITTCNOA_STR-TCNO sy-vline 
WA_H_REITTCNOA_STR-OBJNR sy-vline 
WA_H_REITTCNOA_STR-RESPONSIBLE sy-vline 
WA_H_REITTCNOA_STR-TCTYPE sy-vline 
WA_H_REITTCNOA_STR-XTC sy-vline 
WA_H_REITTCNOA_STR-TCSTATUS sy-vline 
WA_H_REITTCNOA_STR-RERF sy-vline 
WA_H_REITTCNOA_STR-DERF sy-vline 
WA_H_REITTCNOA_STR-TERF sy-vline 
WA_H_REITTCNOA_STR-REHER sy-vline 
WA_H_REITTCNOA_STR-RBEAR sy-vline 
WA_H_REITTCNOA_STR-DBEAR sy-vline 
WA_H_REITTCNOA_STR-TBEAR sy-vline 
WA_H_REITTCNOA_STR-RBHER sy-vline 
WA_H_REITTCNOA_STR-AUTHGRP sy-vline 
WA_H_REITTCNOA_STR-CORRDATEFROM sy-vline 
WA_H_REITTCNOA_STR-CORRDATETO sy-vline 
WA_H_REITTCNOA_STR-FIRSTUSEDATE sy-vline 
WA_H_REITTCNOA_STR-SERVICEDATEFROM sy-vline 
WA_H_REITTCNOA_STR-SERVICEDATETO sy-vline 
WA_H_REITTCNOA_STR-BASELOCK sy-vline      INTO ld_text SEPARATED BY SPACE.

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