ABAP Select data from SAP table TPDA_SYS_MISNAPSHOTTABLINE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TPDA_SYS_MISNAPSHOTTABLINE
*  INTO TABLE @DATA(IT_TPDA_SYS_MISNAPSHOTTABLINE2).
*--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_TPDA_SYS_MISNAPSHOTTABLINE INDEX 1 INTO DATA(WA_TPDA_SYS_MISNAPSHOTTABLINE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TPDA_SYS_MISNAPSHOTTABLINE>-OBJTYPE = 1.
<TPDA_SYS_MISNAPSHOTTABLINE>-OBJID = 1.
<TPDA_SYS_MISNAPSHOTTABLINE>-OBJLABEL = 1.
<TPDA_SYS_MISNAPSHOTTABLINE>-PARENTID = 1.
<TPDA_SYS_MISNAPSHOTTABLINE>-SYSFLAG = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TPDA_SYS_MISNAPSHOTTABLINE-SZKID, sy-vline,
  WA_TPDA_SYS_MISNAPSHOTTABLINE-NALLOC, sy-vline,
  WA_TPDA_SYS_MISNAPSHOTTABLINE-NFILL, sy-vline,
  WA_TPDA_SYS_MISNAPSHOTTABLINE-REFCOUNT, sy-vline,
  WA_TPDA_SYS_MISNAPSHOTTABLINE-BOUNDALLOC, sy-vline,
  WA_TPDA_SYS_MISNAPSHOTTABLINE-BOUNDUSED, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TPDA_SYS_MISNAPSHOTTABLINE 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_TPDA_SYS_MISNAPSHOTTABLINE 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_TPDA_SYS_MISNAPSHOTTABLINE INTO WA_TPDA_SYS_MISNAPSHOTTABLINE.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_TPDA_SYS_MISNAPSHOTTABLINE_STR, 
OBJTYPE TYPE STRING,
OBJID TYPE STRING,
OBJLABEL TYPE STRING,
PARENTID TYPE STRING,
SYSFLAG TYPE STRING,
SZKID TYPE STRING,
NALLOC TYPE STRING,
NFILL TYPE STRING,
REFCOUNT TYPE STRING,
BOUNDALLOC TYPE STRING,
BOUNDUSED TYPE STRING,
REFALLOC TYPE STRING,
REFUSED TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TPDA_SYS_MISNAPSHOTTABLINE_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_TPDA_SYS_MISNAPSHOTTABLINE_STR-OBJTYPE sy-vline 
WA_TPDA_SYS_MISNAPSHOTTABLINE_STR-OBJID sy-vline 
WA_TPDA_SYS_MISNAPSHOTTABLINE_STR-OBJLABEL sy-vline 
WA_TPDA_SYS_MISNAPSHOTTABLINE_STR-PARENTID sy-vline 
WA_TPDA_SYS_MISNAPSHOTTABLINE_STR-SYSFLAG sy-vline 
WA_TPDA_SYS_MISNAPSHOTTABLINE_STR-SZKID sy-vline 
WA_TPDA_SYS_MISNAPSHOTTABLINE_STR-NALLOC sy-vline 
WA_TPDA_SYS_MISNAPSHOTTABLINE_STR-NFILL sy-vline 
WA_TPDA_SYS_MISNAPSHOTTABLINE_STR-REFCOUNT sy-vline 
WA_TPDA_SYS_MISNAPSHOTTABLINE_STR-BOUNDALLOC sy-vline 
WA_TPDA_SYS_MISNAPSHOTTABLINE_STR-BOUNDUSED sy-vline 
WA_TPDA_SYS_MISNAPSHOTTABLINE_STR-REFALLOC sy-vline 
WA_TPDA_SYS_MISNAPSHOTTABLINE_STR-REFUSED sy-vline      INTO ld_text SEPARATED BY SPACE.

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