ABAP Select data from SAP table U_27704 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP U_27704 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 U_27704. 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 U_27704 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_U_27704 TYPE STANDARD TABLE OF U_27704,
      WA_U_27704 TYPE U_27704,
      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: <U_27704> TYPE U_27704.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_U_27704.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM U_27704
  INTO TABLE IT_U_27704.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM U_27704
*  INTO TABLE @DATA(IT_U_277042).
*--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_U_27704 INDEX 1 INTO DATA(WA_U_277042).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_U_27704 ASSIGNING <U_27704>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<U_27704>-MANDT = 1.
<U_27704>-PLVAR = 1.
<U_27704>-OTYPE = 1.
<U_27704>-OBJID = 1.
<U_27704>-RSIGN = 1.

ENDLOOP.

LOOP AT IT_U_27704 INTO WA_U_27704.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_U_27704-RELAT, sy-vline,
  WA_U_27704-BEGDA, sy-vline,
  WA_U_27704-ENDDA, sy-vline,
  WA_U_27704-VARYF, sy-vline,
  WA_U_27704-SEQNR, sy-vline,
  WA_U_27704-SCLAS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_U_27704 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_U_27704 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_U_27704 INTO WA_U_27704.


*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 REFDOCNO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_U_27704-REFDOCNO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_27704-REFDOCNO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field UNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_U_27704-UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_27704-UNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SCOSTCENTER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_U_27704-SCOSTCENTER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_27704-SCOSTCENTER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RCOSTCENTER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_U_27704-RCOSTCENTER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_27704-RCOSTCENTER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RORDER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_U_27704-RORDER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_27704-RORDER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RSALESORDER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_U_27704-RSALESORDER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_27704-RSALESORDER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSN, internal->external for field RWBSELEMENT
CALL FUNCTION 'CONVERSION_EXIT_ABPSN_OUTPUT'
  EXPORTING
    input =                      WA_U_27704-RWBSELEMENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_27704-RWBSELEMENT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field COSTELEMENT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_U_27704-COSTELEMENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_27704-COSTELEMENT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PREVREFDOC
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_U_27704-PREVREFDOC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_27704-PREVREFDOC.
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_U_27704_STR, 
MANDT TYPE STRING,
PLVAR TYPE STRING,
OTYPE TYPE STRING,
OBJID TYPE STRING,
RSIGN TYPE STRING,
RELAT TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,
VARYF TYPE STRING,
SEQNR TYPE STRING,
SCLAS TYPE STRING,
SOBID TYPE STRING,
ADATANR TYPE STRING,
REFDOCNO TYPE STRING,
REFDOCITEM TYPE STRING,
REFDOCSEQNR TYPE STRING,
DOCDATE TYPE STRING,
POSTINGDATE TYPE STRING,
DOCUNAME TYPE STRING,
EVENT TYPE STRING,
STATUS TYPE STRING,
DOCUMENT TYPE STRING,
HRVCOSTELEMENT TYPE STRING,
PRICE TYPE STRING,
CURRENCY TYPE STRING,
QUANTITY TYPE STRING,
UNIT TYPE STRING,
ACTIVITYTYPE TYPE STRING,
CONTROLLINGAREA TYPE STRING,
SCOSTCENTER TYPE STRING,
RCOSTCENTER TYPE STRING,
RORDER TYPE STRING,
RSALESORDER TYPE STRING,
RSALESITEM TYPE STRING,
RWBSELEMENT TYPE STRING,
COSTELEMENT TYPE STRING,
DATESTAMP TYPE STRING,
TIMESTAMP TYPE STRING,
PREVREFDOC TYPE STRING,END OF T_EKKO_STR.
DATA: WA_U_27704_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_U_27704_STR-MANDT sy-vline 
WA_U_27704_STR-PLVAR sy-vline 
WA_U_27704_STR-OTYPE sy-vline 
WA_U_27704_STR-OBJID sy-vline 
WA_U_27704_STR-RSIGN sy-vline 
WA_U_27704_STR-RELAT sy-vline 
WA_U_27704_STR-BEGDA sy-vline 
WA_U_27704_STR-ENDDA sy-vline 
WA_U_27704_STR-VARYF sy-vline 
WA_U_27704_STR-SEQNR sy-vline 
WA_U_27704_STR-SCLAS sy-vline 
WA_U_27704_STR-SOBID sy-vline 
WA_U_27704_STR-ADATANR sy-vline 
WA_U_27704_STR-REFDOCNO sy-vline 
WA_U_27704_STR-REFDOCITEM sy-vline 
WA_U_27704_STR-REFDOCSEQNR sy-vline 
WA_U_27704_STR-DOCDATE sy-vline 
WA_U_27704_STR-POSTINGDATE sy-vline 
WA_U_27704_STR-DOCUNAME sy-vline 
WA_U_27704_STR-EVENT sy-vline 
WA_U_27704_STR-STATUS sy-vline 
WA_U_27704_STR-DOCUMENT sy-vline 
WA_U_27704_STR-HRVCOSTELEMENT sy-vline 
WA_U_27704_STR-PRICE sy-vline 
WA_U_27704_STR-CURRENCY sy-vline 
WA_U_27704_STR-QUANTITY sy-vline 
WA_U_27704_STR-UNIT sy-vline 
WA_U_27704_STR-ACTIVITYTYPE sy-vline 
WA_U_27704_STR-CONTROLLINGAREA sy-vline 
WA_U_27704_STR-SCOSTCENTER sy-vline 
WA_U_27704_STR-RCOSTCENTER sy-vline 
WA_U_27704_STR-RORDER sy-vline 
WA_U_27704_STR-RSALESORDER sy-vline 
WA_U_27704_STR-RSALESITEM sy-vline 
WA_U_27704_STR-RWBSELEMENT sy-vline 
WA_U_27704_STR-COSTELEMENT sy-vline 
WA_U_27704_STR-DATESTAMP sy-vline 
WA_U_27704_STR-TIMESTAMP sy-vline 
WA_U_27704_STR-PREVREFDOC sy-vline      INTO ld_text SEPARATED BY SPACE.

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