ABAP Select data from SAP table RESRVDINVLIST into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RESRVDINVLIST
*  INTO TABLE @DATA(IT_RESRVDINVLIST2).
*--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_RESRVDINVLIST INDEX 1 INTO DATA(WA_RESRVDINVLIST2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RESRVDINVLIST>-ALVBOX = 1.
<RESRVDINVLIST>-ALVINFO = 1.
<RESRVDINVLIST>-PRINTABLE = 1.
<RESRVDINVLIST>-MANDT = 1.
<RESRVDINVLIST>-SRECHNGNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RESRVDINVLIST-SRECHNGJAHR, sy-vline,
  WA_RESRVDINVLIST-BUKRS, sy-vline,
  WA_RESRVDINVLIST-RPARTNR, sy-vline,
  WA_RESRVDINVLIST-RPARTNR_ADR_REF, sy-vline,
  WA_RESRVDINVLIST-KUNNR, sy-vline,
  WA_RESRVDINVLIST-RDARNEHM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RESRVDINVLIST 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_RESRVDINVLIST 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_RESRVDINVLIST INTO WA_RESRVDINVLIST.


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

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

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

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

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

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

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

*Conversion exit ISOLA, internal->external for field SPRAS
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_RESRVDINVLIST-SPRAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RESRVDINVLIST-SPRAS.
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_RESRVDINVLIST_STR, 
ALVBOX TYPE STRING,
ALVINFO TYPE STRING,
PRINTABLE TYPE STRING,
MANDT TYPE STRING,
SRECHNGNR TYPE STRING,
SRECHNGJAHR TYPE STRING,
BUKRS TYPE STRING,
RPARTNR TYPE STRING,
RPARTNR_ADR_REF TYPE STRING,
KUNNR TYPE STRING,
RDARNEHM TYPE STRING,
RDARNEHM_ADR_REF TYPE STRING,
HDN_KUNNR TYPE STRING,
SBWHR TYPE STRING,
DZLSCH TYPE STRING,
DINVFROM TYPE STRING,
DINVTO TYPE STRING,
INVALLOPENITEMS TYPE STRING,
INVCOLLECT TYPE STRING,
INVPERIOD TYPE STRING,
PLANACTUAL TYPE STRING,
INVRESTFI TYPE STRING,
PRINTDATE TYPE STRING,
BBWHR TYPE STRING,
SSOLHAB TYPE STRING,
DBERVON TYPE STRING,
DBERBIS TYPE STRING,
DFAELL TYPE STRING,
COUNT_RANL TYPE STRING,
COUNT_RKLAMMER TYPE STRING,
ALTPAYER 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,
RQIDENT TYPE STRING,
RKLAMMER TYPE STRING,
RANL TYPE STRING,
ANRED TYPE STRING,
NAME1 TYPE STRING,
NAME2 TYPE STRING,
STRAS TYPE STRING,
PFACH TYPE STRING,
PSTL2 TYPE STRING,
PFORT TYPE STRING,
LAND1 TYPE STRING,
PSTLZ TYPE STRING,
ORT01 TYPE STRING,
ORT02 TYPE STRING,
REGIO TYPE STRING,
SPRAS TYPE STRING,
INLND TYPE STRING,
LINEK TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RESRVDINVLIST_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_RESRVDINVLIST_STR-ALVBOX sy-vline 
WA_RESRVDINVLIST_STR-ALVINFO sy-vline 
WA_RESRVDINVLIST_STR-PRINTABLE sy-vline 
WA_RESRVDINVLIST_STR-MANDT sy-vline 
WA_RESRVDINVLIST_STR-SRECHNGNR sy-vline 
WA_RESRVDINVLIST_STR-SRECHNGJAHR sy-vline 
WA_RESRVDINVLIST_STR-BUKRS sy-vline 
WA_RESRVDINVLIST_STR-RPARTNR sy-vline 
WA_RESRVDINVLIST_STR-RPARTNR_ADR_REF sy-vline 
WA_RESRVDINVLIST_STR-KUNNR sy-vline 
WA_RESRVDINVLIST_STR-RDARNEHM sy-vline 
WA_RESRVDINVLIST_STR-RDARNEHM_ADR_REF sy-vline 
WA_RESRVDINVLIST_STR-HDN_KUNNR sy-vline 
WA_RESRVDINVLIST_STR-SBWHR sy-vline 
WA_RESRVDINVLIST_STR-DZLSCH sy-vline 
WA_RESRVDINVLIST_STR-DINVFROM sy-vline 
WA_RESRVDINVLIST_STR-DINVTO sy-vline 
WA_RESRVDINVLIST_STR-INVALLOPENITEMS sy-vline 
WA_RESRVDINVLIST_STR-INVCOLLECT sy-vline 
WA_RESRVDINVLIST_STR-INVPERIOD sy-vline 
WA_RESRVDINVLIST_STR-PLANACTUAL sy-vline 
WA_RESRVDINVLIST_STR-INVRESTFI sy-vline 
WA_RESRVDINVLIST_STR-PRINTDATE sy-vline 
WA_RESRVDINVLIST_STR-BBWHR sy-vline 
WA_RESRVDINVLIST_STR-SSOLHAB sy-vline 
WA_RESRVDINVLIST_STR-DBERVON sy-vline 
WA_RESRVDINVLIST_STR-DBERBIS sy-vline 
WA_RESRVDINVLIST_STR-DFAELL sy-vline 
WA_RESRVDINVLIST_STR-COUNT_RANL sy-vline 
WA_RESRVDINVLIST_STR-COUNT_RKLAMMER sy-vline 
WA_RESRVDINVLIST_STR-ALTPAYER sy-vline 
WA_RESRVDINVLIST_STR-RERF sy-vline 
WA_RESRVDINVLIST_STR-DERF sy-vline 
WA_RESRVDINVLIST_STR-TERF sy-vline 
WA_RESRVDINVLIST_STR-REHER sy-vline 
WA_RESRVDINVLIST_STR-RBEAR sy-vline 
WA_RESRVDINVLIST_STR-DBEAR sy-vline 
WA_RESRVDINVLIST_STR-TBEAR sy-vline 
WA_RESRVDINVLIST_STR-RBHER sy-vline 
WA_RESRVDINVLIST_STR-RQIDENT sy-vline 
WA_RESRVDINVLIST_STR-RKLAMMER sy-vline 
WA_RESRVDINVLIST_STR-RANL sy-vline 
WA_RESRVDINVLIST_STR-ANRED sy-vline 
WA_RESRVDINVLIST_STR-NAME1 sy-vline 
WA_RESRVDINVLIST_STR-NAME2 sy-vline 
WA_RESRVDINVLIST_STR-STRAS sy-vline 
WA_RESRVDINVLIST_STR-PFACH sy-vline 
WA_RESRVDINVLIST_STR-PSTL2 sy-vline 
WA_RESRVDINVLIST_STR-PFORT sy-vline 
WA_RESRVDINVLIST_STR-LAND1 sy-vline 
WA_RESRVDINVLIST_STR-PSTLZ sy-vline 
WA_RESRVDINVLIST_STR-ORT01 sy-vline 
WA_RESRVDINVLIST_STR-ORT02 sy-vline 
WA_RESRVDINVLIST_STR-REGIO sy-vline 
WA_RESRVDINVLIST_STR-SPRAS sy-vline 
WA_RESRVDINVLIST_STR-INLND sy-vline 
WA_RESRVDINVLIST_STR-LINEK sy-vline      INTO ld_text SEPARATED BY SPACE.

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