ABAP Select data from SAP table ICACHESHRTST into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ICACHESHRTST
*  INTO TABLE @DATA(IT_ICACHESHRTST2).
*--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_ICACHESHRTST INDEX 1 INTO DATA(WA_ICACHESHRTST2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ICACHESHRTST>-MANDT = 1.
<ICACHESHRTST>-MRPPLANT = 1.
<ICACHESHRTST>-MATERIAL = 1.
<ICACHESHRTST>-MRPAREA = 1.
<ICACHESHRTST>-MRPPLANNINGSEGMENTTYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ICACHESHRTST-MRPPLANNINGSEGMENT, sy-vline,
  WA_ICACHESHRTST-MATERIALSHORTAGEPROFILE, sy-vline,
  WA_ICACHESHRTST-MATERIALSHORTAGEPROFILECOUNT, sy-vline,
  WA_ICACHESHRTST-MATERIALSHORTAGESTARTDATE, sy-vline,
  WA_ICACHESHRTST-MATERIALSHORTAGEENDDATE, sy-vline,
  WA_ICACHESHRTST-MATERIALSHORTAGEQUANTITY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ICACHESHRTST 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_ICACHESHRTST 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_ICACHESHRTST INTO WA_ICACHESHRTST.


*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_ICACHESHRTST-MATERIAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICACHESHRTST-MATERIAL.
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_ICACHESHRTST_STR, 
MANDT TYPE STRING,
MRPPLANT TYPE STRING,
MATERIAL TYPE STRING,
MRPAREA TYPE STRING,
MRPPLANNINGSEGMENTTYPE TYPE STRING,
MRPPLANNINGSEGMENT TYPE STRING,
MATERIALSHORTAGEPROFILE TYPE STRING,
MATERIALSHORTAGEPROFILECOUNT TYPE STRING,
MATERIALSHORTAGESTARTDATE TYPE STRING,
MATERIALSHORTAGEENDDATE TYPE STRING,
MATERIALSHORTAGEQUANTITY TYPE STRING,
MATERIALSHORTAGEDURATION TYPE STRING,
MATERIALSHORTAGEDURNINWORKDAYS TYPE STRING,
DAYSOFSUPPLYCOVERAGEPERCENT TYPE STRING,
MINAVAILABLEQTYATSHORTAGE TYPE STRING,
MINAVAILQTYOVERCOMPLETEHRZN TYPE STRING,
DAYSOFSUPPLYDURATION TYPE STRING,
MATLMAXCOVERAGEDURNINWORKDAYS TYPE STRING,
NUMBEROFSHORTAGESPERSEGMENT TYPE STRING,
MATERIALFIRSTSHORTAGEDATE TYPE STRING,
MATERIALFIRSTSHORTAGEDATEQTY TYPE STRING,
INTRADAYSUPPLYDURATION TYPE STRING,
EVALUATIONHORIZONINDAYS TYPE STRING,
MATERIALSHORTAGEDEFINITIONNAME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ICACHESHRTST_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_ICACHESHRTST_STR-MANDT sy-vline 
WA_ICACHESHRTST_STR-MRPPLANT sy-vline 
WA_ICACHESHRTST_STR-MATERIAL sy-vline 
WA_ICACHESHRTST_STR-MRPAREA sy-vline 
WA_ICACHESHRTST_STR-MRPPLANNINGSEGMENTTYPE sy-vline 
WA_ICACHESHRTST_STR-MRPPLANNINGSEGMENT sy-vline 
WA_ICACHESHRTST_STR-MATERIALSHORTAGEPROFILE sy-vline 
WA_ICACHESHRTST_STR-MATERIALSHORTAGEPROFILECOUNT sy-vline 
WA_ICACHESHRTST_STR-MATERIALSHORTAGESTARTDATE sy-vline 
WA_ICACHESHRTST_STR-MATERIALSHORTAGEENDDATE sy-vline 
WA_ICACHESHRTST_STR-MATERIALSHORTAGEQUANTITY sy-vline 
WA_ICACHESHRTST_STR-MATERIALSHORTAGEDURATION sy-vline 
WA_ICACHESHRTST_STR-MATERIALSHORTAGEDURNINWORKDAYS sy-vline 
WA_ICACHESHRTST_STR-DAYSOFSUPPLYCOVERAGEPERCENT sy-vline 
WA_ICACHESHRTST_STR-MINAVAILABLEQTYATSHORTAGE sy-vline 
WA_ICACHESHRTST_STR-MINAVAILQTYOVERCOMPLETEHRZN sy-vline 
WA_ICACHESHRTST_STR-DAYSOFSUPPLYDURATION sy-vline 
WA_ICACHESHRTST_STR-MATLMAXCOVERAGEDURNINWORKDAYS sy-vline 
WA_ICACHESHRTST_STR-NUMBEROFSHORTAGESPERSEGMENT sy-vline 
WA_ICACHESHRTST_STR-MATERIALFIRSTSHORTAGEDATE sy-vline 
WA_ICACHESHRTST_STR-MATERIALFIRSTSHORTAGEDATEQTY sy-vline 
WA_ICACHESHRTST_STR-INTRADAYSUPPLYDURATION sy-vline 
WA_ICACHESHRTST_STR-EVALUATIONHORIZONINDAYS sy-vline 
WA_ICACHESHRTST_STR-MATERIALSHORTAGEDEFINITIONNAME sy-vline      INTO ld_text SEPARATED BY SPACE.

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