ABAP Select data from SAP table ISESTMERECG into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ISESTMERECG
*  INTO TABLE @DATA(IT_ISESTMERECG2).
*--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_ISESTMERECG INDEX 1 INTO DATA(WA_ISESTMERECG2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ISESTMERECG>-MANDT = 1.
<ISESTMERECG>-REFERENCEDOCUMENT = 1.
<ISESTMERECG>-ISDELETED = 1.
<ISESTMERECG>-TIMESHEETNOTE = 1.
<ISESTMERECG>-PERSONNELNUMBER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ISESTMERECG-SERVICEPERFORMANCEDATE, sy-vline,
  WA_ISESTMERECG-COSTCENTER, sy-vline,
  WA_ISESTMERECG-WBSELEMENTINTERNALID, sy-vline,
  WA_ISESTMERECG-ORDERID, sy-vline,
  WA_ISESTMERECG-SALESORDER, sy-vline,
  WA_ISESTMERECG-SALESORDERITEM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ISESTMERECG 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_ISESTMERECG 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_ISESTMERECG INTO WA_ISESTMERECG.


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

*Conversion exit ABPSP, internal->external for field WBSELEMENTINTERNALID
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_ISESTMERECG-WBSELEMENTINTERNALID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISESTMERECG-WBSELEMENTINTERNALID.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field MATERIALDOCUMENT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ISESTMERECG-MATERIALDOCUMENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISESTMERECG-MATERIALDOCUMENT.
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_ISESTMERECG_STR, 
MANDT TYPE STRING,
REFERENCEDOCUMENT TYPE STRING,
ISDELETED TYPE STRING,
TIMESHEETNOTE TYPE STRING,
PERSONNELNUMBER TYPE STRING,
SERVICEPERFORMANCEDATE TYPE STRING,
COSTCENTER TYPE STRING,
WBSELEMENTINTERNALID TYPE STRING,
ORDERID TYPE STRING,
SALESORDER TYPE STRING,
SALESORDERITEM TYPE STRING,
PURCHASEORDER TYPE STRING,
PURCHASEORDERITEM TYPE STRING,
QUANTITY TYPE STRING,
UNITOFMEASURE TYPE STRING,
ISSETTLED TYPE STRING,
WORKITEM TYPE STRING,
ISENDOFPURPOSEBLOCKED TYPE STRING,
PURCHASINGORGANIZATION TYPE STRING,
PURCHASINGGROUP TYPE STRING,
PLANT TYPE STRING,
COMPANYCODE TYPE STRING,
SERVICEENTRYSHEET TYPE STRING,
APPROVALSTATUS TYPE STRING,
MATERIALDOCUMENT TYPE STRING,
SERVICEENTRYSHEETITEMISDELETED TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ISESTMERECG_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_ISESTMERECG_STR-MANDT sy-vline 
WA_ISESTMERECG_STR-REFERENCEDOCUMENT sy-vline 
WA_ISESTMERECG_STR-ISDELETED sy-vline 
WA_ISESTMERECG_STR-TIMESHEETNOTE sy-vline 
WA_ISESTMERECG_STR-PERSONNELNUMBER sy-vline 
WA_ISESTMERECG_STR-SERVICEPERFORMANCEDATE sy-vline 
WA_ISESTMERECG_STR-COSTCENTER sy-vline 
WA_ISESTMERECG_STR-WBSELEMENTINTERNALID sy-vline 
WA_ISESTMERECG_STR-ORDERID sy-vline 
WA_ISESTMERECG_STR-SALESORDER sy-vline 
WA_ISESTMERECG_STR-SALESORDERITEM sy-vline 
WA_ISESTMERECG_STR-PURCHASEORDER sy-vline 
WA_ISESTMERECG_STR-PURCHASEORDERITEM sy-vline 
WA_ISESTMERECG_STR-QUANTITY sy-vline 
WA_ISESTMERECG_STR-UNITOFMEASURE sy-vline 
WA_ISESTMERECG_STR-ISSETTLED sy-vline 
WA_ISESTMERECG_STR-WORKITEM sy-vline 
WA_ISESTMERECG_STR-ISENDOFPURPOSEBLOCKED sy-vline 
WA_ISESTMERECG_STR-PURCHASINGORGANIZATION sy-vline 
WA_ISESTMERECG_STR-PURCHASINGGROUP sy-vline 
WA_ISESTMERECG_STR-PLANT sy-vline 
WA_ISESTMERECG_STR-COMPANYCODE sy-vline 
WA_ISESTMERECG_STR-SERVICEENTRYSHEET sy-vline 
WA_ISESTMERECG_STR-APPROVALSTATUS sy-vline 
WA_ISESTMERECG_STR-MATERIALDOCUMENT sy-vline 
WA_ISESTMERECG_STR-SERVICEENTRYSHEETITEMISDELETED sy-vline      INTO ld_text SEPARATED BY SPACE.

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