ABAP Select data from SAP table CTANKVISU into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CTANKVISU
*  INTO TABLE @DATA(IT_CTANKVISU2).
*--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_CTANKVISU INDEX 1 INTO DATA(WA_CTANKVISU2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CTANKVISU>-MANDT = 1.
<CTANKVISU>-LOCATIONID = 1.
<CTANKVISU>-TANKID = 1.
<CTANKVISU>-MATERIAL = 1.
<CTANKVISU>-OPENTANKDIPTIME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CTANKVISU-DIPGUID, sy-vline,
  WA_CTANKVISU-OILTIMESTAMPDISPLAY, sy-vline,
  WA_CTANKVISU-MATERIALDESCRIPTION, sy-vline,
  WA_CTANKVISU-CAPACITY, sy-vline,
  WA_CTANKVISU-UNPUMPABLEQUANTITY, sy-vline,
  WA_CTANKVISU-MATERIALVOLUMEUOM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CTANKVISU 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_CTANKVISU 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_CTANKVISU INTO WA_CTANKVISU.


*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 MATN1, internal->external for field MATERIAL
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_CTANKVISU-MATERIAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CTANKVISU-MATERIAL.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

*Conversion exit CUNIT, internal->external for field LINEARVOLCNVRSNUOM
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CTANKVISU-LINEARVOLCNVRSNUOM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CTANKVISU-LINEARVOLCNVRSNUOM.
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_CTANKVISU_STR, 
MANDT TYPE STRING,
LOCATIONID TYPE STRING,
TANKID TYPE STRING,
MATERIAL TYPE STRING,
OPENTANKDIPTIME TYPE STRING,
DIPGUID TYPE STRING,
OILTIMESTAMPDISPLAY TYPE STRING,
MATERIALDESCRIPTION TYPE STRING,
CAPACITY TYPE STRING,
UNPUMPABLEQUANTITY TYPE STRING,
MATERIALVOLUMEUOM TYPE STRING,
MINIMUMHEIGHT TYPE STRING,
MAXIMUMHEIGHT TYPE STRING,
LENGTHUNITOFMEASURE TYPE STRING,
TANKDIPTOTALHEIGHT TYPE STRING,
TANKDIPTOTALHEIGHTUOM TYPE STRING,
TANKDIPWATERHEIGHT TYPE STRING,
TANKDIPWATERHEIGHTUOM TYPE STRING,
LINEARVOLMATERIALQTY TYPE STRING,
LINEARVOLWATERQTY TYPE STRING,
LINEARVOLCNVRSNUOM TYPE STRING,
NETSTANDARDVOLUME TYPE STRING,
NETSTANDARDVOLUMEUOM TYPE STRING,
DRYGROSSVOLUME TYPE STRING,
DRYGROSSVOLUMEUOM TYPE STRING,
AMBIENTTEMPERATURE TYPE STRING,
AMBIENTTEMPERATUREUNIT TYPE STRING,
STANDARDDENSITY TYPE STRING,
STANDARDDENSITYUNIT TYPE STRING,
BASESEDIMENTWATER TYPE STRING,
BASESEDIMENTWATERUNIT TYPE STRING,
VAPORLIQVOLUME TYPE STRING,
VAPORLIQVOLUMEUNIT TYPE STRING,
SHELLTEMPERATURE TYPE STRING,
SHELLTEMPERATUREUNIT TYPE STRING,
TANKUTILIZATIONRATIO TYPE STRING,
STORAGETYPE TYPE STRING,
PLANTCOUNTRY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CTANKVISU_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_CTANKVISU_STR-MANDT sy-vline 
WA_CTANKVISU_STR-LOCATIONID sy-vline 
WA_CTANKVISU_STR-TANKID sy-vline 
WA_CTANKVISU_STR-MATERIAL sy-vline 
WA_CTANKVISU_STR-OPENTANKDIPTIME sy-vline 
WA_CTANKVISU_STR-DIPGUID sy-vline 
WA_CTANKVISU_STR-OILTIMESTAMPDISPLAY sy-vline 
WA_CTANKVISU_STR-MATERIALDESCRIPTION sy-vline 
WA_CTANKVISU_STR-CAPACITY sy-vline 
WA_CTANKVISU_STR-UNPUMPABLEQUANTITY sy-vline 
WA_CTANKVISU_STR-MATERIALVOLUMEUOM sy-vline 
WA_CTANKVISU_STR-MINIMUMHEIGHT sy-vline 
WA_CTANKVISU_STR-MAXIMUMHEIGHT sy-vline 
WA_CTANKVISU_STR-LENGTHUNITOFMEASURE sy-vline 
WA_CTANKVISU_STR-TANKDIPTOTALHEIGHT sy-vline 
WA_CTANKVISU_STR-TANKDIPTOTALHEIGHTUOM sy-vline 
WA_CTANKVISU_STR-TANKDIPWATERHEIGHT sy-vline 
WA_CTANKVISU_STR-TANKDIPWATERHEIGHTUOM sy-vline 
WA_CTANKVISU_STR-LINEARVOLMATERIALQTY sy-vline 
WA_CTANKVISU_STR-LINEARVOLWATERQTY sy-vline 
WA_CTANKVISU_STR-LINEARVOLCNVRSNUOM sy-vline 
WA_CTANKVISU_STR-NETSTANDARDVOLUME sy-vline 
WA_CTANKVISU_STR-NETSTANDARDVOLUMEUOM sy-vline 
WA_CTANKVISU_STR-DRYGROSSVOLUME sy-vline 
WA_CTANKVISU_STR-DRYGROSSVOLUMEUOM sy-vline 
WA_CTANKVISU_STR-AMBIENTTEMPERATURE sy-vline 
WA_CTANKVISU_STR-AMBIENTTEMPERATUREUNIT sy-vline 
WA_CTANKVISU_STR-STANDARDDENSITY sy-vline 
WA_CTANKVISU_STR-STANDARDDENSITYUNIT sy-vline 
WA_CTANKVISU_STR-BASESEDIMENTWATER sy-vline 
WA_CTANKVISU_STR-BASESEDIMENTWATERUNIT sy-vline 
WA_CTANKVISU_STR-VAPORLIQVOLUME sy-vline 
WA_CTANKVISU_STR-VAPORLIQVOLUMEUNIT sy-vline 
WA_CTANKVISU_STR-SHELLTEMPERATURE sy-vline 
WA_CTANKVISU_STR-SHELLTEMPERATUREUNIT sy-vline 
WA_CTANKVISU_STR-TANKUTILIZATIONRATIO sy-vline 
WA_CTANKVISU_STR-STORAGETYPE sy-vline 
WA_CTANKVISU_STR-PLANTCOUNTRY sy-vline      INTO ld_text SEPARATED BY SPACE.

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