ABAP Select data from SAP table TCUSTENGIEN01 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP TCUSTENGIEN01 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 TCUSTENGIEN01. 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 TCUSTENGIEN01 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_TCUSTENGIEN01 TYPE STANDARD TABLE OF TCUSTENGIEN01,
      WA_TCUSTENGIEN01 TYPE TCUSTENGIEN01,
      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: <TCUSTENGIEN01> TYPE TCUSTENGIEN01.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_TCUSTENGIEN01.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM TCUSTENGIEN01
  INTO TABLE IT_TCUSTENGIEN01.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TCUSTENGIEN01
*  INTO TABLE @DATA(IT_TCUSTENGIEN012).
*--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_TCUSTENGIEN01 INDEX 1 INTO DATA(WA_TCUSTENGIEN012).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_TCUSTENGIEN01 ASSIGNING <TCUSTENGIEN01>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TCUSTENGIEN01>-CLIENT = 1.
<TCUSTENGIEN01>-OBJECT = 1.
<TCUSTENGIEN01>-RFC_GROUP = 1.
<TCUSTENGIEN01>-MAXTASKS = 1.
<TCUSTENGIEN01>-MAXCOUNT = 1.

ENDLOOP.

LOOP AT IT_TCUSTENGIEN01 INTO WA_TCUSTENGIEN01.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TCUSTENGIEN01-PACKAGESIZE, sy-vline,
  WA_TCUSTENGIEN01-FOLLOW_UP_PERIOD, sy-vline,
  WA_TCUSTENGIEN01-FOLLOW_UP_UNIT, sy-vline,
  WA_TCUSTENGIEN01-RESIDENCE, sy-vline,
  WA_TCUSTENGIEN01-RESIDENCE_UNIT, sy-vline,
  WA_TCUSTENGIEN01-IGNITION, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TCUSTENGIEN01 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_TCUSTENGIEN01 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_TCUSTENGIEN01 INTO WA_TCUSTENGIEN01.


*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_TCUSTENGIEN01_STR, 
CLIENT TYPE STRING,
OBJECT TYPE STRING,
RFC_GROUP TYPE STRING,
MAXTASKS TYPE STRING,
MAXCOUNT TYPE STRING,
PACKAGESIZE TYPE STRING,
FOLLOW_UP_PERIOD TYPE STRING,
FOLLOW_UP_UNIT TYPE STRING,
RESIDENCE TYPE STRING,
RESIDENCE_UNIT TYPE STRING,
IGNITION TYPE STRING,
ARCHIVE TYPE STRING,
ANALYZE TYPE STRING,
WRITE_AR TYPE STRING,
DELETE_AR TYPE STRING,
RELOAD TYPE STRING,
DELETE_WO_ARCHIV TYPE STRING,
ANALYZE_MIGRATIO TYPE STRING,
DELETE_MIGRATION TYPE STRING,
DISPLAY_ARCHIVE TYPE STRING,
BACKGROUND TYPE STRING,
UNDO_STATUS TYPE STRING,
CONSTRAINTS TYPE STRING,
MONITOR TYPE STRING,
ADAPTIVE_MULTITA TYPE STRING,
CHECK_SYSTEM TYPE STRING,
OBJECTSPEC_CUST TYPE STRING,
RESIDENCE_ASSIGN TYPE STRING,
ARCHIVING_FACTOR TYPE STRING,
LOG TYPE STRING,
DIAGNOSIS TYPE STRING,
RESIDENCE_MIN TYPE STRING,
ALLOW_DEL_WO_AR TYPE STRING,
SNAPSHOT TYPE STRING,
DESTRUCTION TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TCUSTENGIEN01_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_TCUSTENGIEN01_STR-CLIENT sy-vline 
WA_TCUSTENGIEN01_STR-OBJECT sy-vline 
WA_TCUSTENGIEN01_STR-RFC_GROUP sy-vline 
WA_TCUSTENGIEN01_STR-MAXTASKS sy-vline 
WA_TCUSTENGIEN01_STR-MAXCOUNT sy-vline 
WA_TCUSTENGIEN01_STR-PACKAGESIZE sy-vline 
WA_TCUSTENGIEN01_STR-FOLLOW_UP_PERIOD sy-vline 
WA_TCUSTENGIEN01_STR-FOLLOW_UP_UNIT sy-vline 
WA_TCUSTENGIEN01_STR-RESIDENCE sy-vline 
WA_TCUSTENGIEN01_STR-RESIDENCE_UNIT sy-vline 
WA_TCUSTENGIEN01_STR-IGNITION sy-vline 
WA_TCUSTENGIEN01_STR-ARCHIVE sy-vline 
WA_TCUSTENGIEN01_STR-ANALYZE sy-vline 
WA_TCUSTENGIEN01_STR-WRITE_AR sy-vline 
WA_TCUSTENGIEN01_STR-DELETE_AR sy-vline 
WA_TCUSTENGIEN01_STR-RELOAD sy-vline 
WA_TCUSTENGIEN01_STR-DELETE_WO_ARCHIV sy-vline 
WA_TCUSTENGIEN01_STR-ANALYZE_MIGRATIO sy-vline 
WA_TCUSTENGIEN01_STR-DELETE_MIGRATION sy-vline 
WA_TCUSTENGIEN01_STR-DISPLAY_ARCHIVE sy-vline 
WA_TCUSTENGIEN01_STR-BACKGROUND sy-vline 
WA_TCUSTENGIEN01_STR-UNDO_STATUS sy-vline 
WA_TCUSTENGIEN01_STR-CONSTRAINTS sy-vline 
WA_TCUSTENGIEN01_STR-MONITOR sy-vline 
WA_TCUSTENGIEN01_STR-ADAPTIVE_MULTITA sy-vline 
WA_TCUSTENGIEN01_STR-CHECK_SYSTEM sy-vline 
WA_TCUSTENGIEN01_STR-OBJECTSPEC_CUST sy-vline 
WA_TCUSTENGIEN01_STR-RESIDENCE_ASSIGN sy-vline 
WA_TCUSTENGIEN01_STR-ARCHIVING_FACTOR sy-vline 
WA_TCUSTENGIEN01_STR-LOG sy-vline 
WA_TCUSTENGIEN01_STR-DIAGNOSIS sy-vline 
WA_TCUSTENGIEN01_STR-RESIDENCE_MIN sy-vline 
WA_TCUSTENGIEN01_STR-ALLOW_DEL_WO_AR sy-vline 
WA_TCUSTENGIEN01_STR-SNAPSHOT sy-vline 
WA_TCUSTENGIEN01_STR-DESTRUCTION sy-vline      INTO ld_text SEPARATED BY SPACE.

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