ABAP Select data from SAP table OIUVL_GASRPTD into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM OIUVL_GASRPTD
*  INTO TABLE @DATA(IT_OIUVL_GASRPTD2).
*--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_OIUVL_GASRPTD INDEX 1 INTO DATA(WA_OIUVL_GASRPTD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<OIUVL_GASRPTD>-MANDT = 1.
<OIUVL_GASRPTD>-GASRPTH_NO = 1.
<OIUVL_GASRPTD>-SEQ_NO = 1.
<OIUVL_GASRPTD>-WI_OWN_NO = 1.
<OIUVL_GASRPTD>-WI_INT_TYPE_CD = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_OIUVL_GASRPTD-WI_OWN_ISQ_NO, sy-vline,
  WA_OIUVL_GASRPTD-EFF_FROM_DT, sy-vline,
  WA_OIUVL_GASRPTD-EFF_TO_DT, sy-vline,
  WA_OIUVL_GASRPTD-VL_TYPE_CD, sy-vline,
  WA_OIUVL_GASRPTD-TRNSP_NO, sy-vline,
  WA_OIUVL_GASRPTD-TRNSP_REF_NO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_OIUVL_GASRPTD 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_OIUVL_GASRPTD 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_OIUVL_GASRPTD INTO WA_OIUVL_GASRPTD.


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

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

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

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

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

*Conversion exit CUNIT, internal->external for field HEAT_VALUE_FCT_U
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_OIUVL_GASRPTD-HEAT_VALUE_FCT_U
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIUVL_GASRPTD-HEAT_VALUE_FCT_U.
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_OIUVL_GASRPTD_STR, 
MANDT TYPE STRING,
GASRPTH_NO TYPE STRING,
SEQ_NO TYPE STRING,
WI_OWN_NO TYPE STRING,
WI_INT_TYPE_CD TYPE STRING,
WI_OWN_ISQ_NO TYPE STRING,
EFF_FROM_DT TYPE STRING,
EFF_TO_DT TYPE STRING,
VL_TYPE_CD TYPE STRING,
TRNSP_NO TYPE STRING,
TRNSP_REF_NO TYPE STRING,
ACTL_GR_VL TYPE STRING,
ENTL_GR_VL TYPE STRING,
VOLUME_UNIT TYPE STRING,
PC_AMT TYPE STRING,
PC_CURR TYPE STRING,
ACTL_ENERGY TYPE STRING,
ENTL_ENERGY TYPE STRING,
ENERGY_U TYPE STRING,
ACTL_GR_VAL_AM TYPE STRING,
ENTL_GR_VAL_AM TYPE STRING,
ACT_HEAT_VAL_FCT TYPE STRING,
HEAT_VALUE_FCT_U TYPE STRING,
OIU_CRUSER TYPE STRING,
OIU_TIMESTAMP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_OIUVL_GASRPTD_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_OIUVL_GASRPTD_STR-MANDT sy-vline 
WA_OIUVL_GASRPTD_STR-GASRPTH_NO sy-vline 
WA_OIUVL_GASRPTD_STR-SEQ_NO sy-vline 
WA_OIUVL_GASRPTD_STR-WI_OWN_NO sy-vline 
WA_OIUVL_GASRPTD_STR-WI_INT_TYPE_CD sy-vline 
WA_OIUVL_GASRPTD_STR-WI_OWN_ISQ_NO sy-vline 
WA_OIUVL_GASRPTD_STR-EFF_FROM_DT sy-vline 
WA_OIUVL_GASRPTD_STR-EFF_TO_DT sy-vline 
WA_OIUVL_GASRPTD_STR-VL_TYPE_CD sy-vline 
WA_OIUVL_GASRPTD_STR-TRNSP_NO sy-vline 
WA_OIUVL_GASRPTD_STR-TRNSP_REF_NO sy-vline 
WA_OIUVL_GASRPTD_STR-ACTL_GR_VL sy-vline 
WA_OIUVL_GASRPTD_STR-ENTL_GR_VL sy-vline 
WA_OIUVL_GASRPTD_STR-VOLUME_UNIT sy-vline 
WA_OIUVL_GASRPTD_STR-PC_AMT sy-vline 
WA_OIUVL_GASRPTD_STR-PC_CURR sy-vline 
WA_OIUVL_GASRPTD_STR-ACTL_ENERGY sy-vline 
WA_OIUVL_GASRPTD_STR-ENTL_ENERGY sy-vline 
WA_OIUVL_GASRPTD_STR-ENERGY_U sy-vline 
WA_OIUVL_GASRPTD_STR-ACTL_GR_VAL_AM sy-vline 
WA_OIUVL_GASRPTD_STR-ENTL_GR_VAL_AM sy-vline 
WA_OIUVL_GASRPTD_STR-ACT_HEAT_VAL_FCT sy-vline 
WA_OIUVL_GASRPTD_STR-HEAT_VALUE_FCT_U sy-vline 
WA_OIUVL_GASRPTD_STR-OIU_CRUSER sy-vline 
WA_OIUVL_GASRPTD_STR-OIU_TIMESTAMP sy-vline      INTO ld_text SEPARATED BY SPACE.

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