ABAP Select data from SAP table TSTATH into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP TSTATH 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 TSTATH. 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 TSTATH 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_TSTATH TYPE STANDARD TABLE OF TSTATH,
      WA_TSTATH TYPE TSTATH,
      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: <TSTATH> TYPE TSTATH.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TSTATH
*  INTO TABLE @DATA(IT_TSTATH2).
*--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_TSTATH INDEX 1 INTO DATA(WA_TSTATH2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TSTATH>-DOC_CLS = 1.
<TSTATH>-DOC_OBJ = 1.
<TSTATH>-PROJECT = 1.
<TSTATH>-VIEWNAME = 1.
<TSTATH>-OUTLINE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TSTATH-STATUS, sy-vline,
  WA_TSTATH-PLANSTART, sy-vline,
  WA_TSTATH-PLANEND, sy-vline,
  WA_TSTATH-PLANDUR, sy-vline,
  WA_TSTATH-ACTULSTART, sy-vline,
  WA_TSTATH-ACTULEND, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TSTATH 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_TSTATH 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_TSTATH INTO WA_TSTATH.


*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_TSTATH_STR, 
DOC_CLS TYPE STRING,
DOC_OBJ TYPE STRING,
PROJECT TYPE STRING,
VIEWNAME TYPE STRING,
OUTLINE TYPE STRING,
STATUS TYPE STRING,
PLANSTART TYPE STRING,
PLANEND TYPE STRING,
PLANDUR TYPE STRING,
ACTULSTART TYPE STRING,
ACTULEND TYPE STRING,
ACTULDUR TYPE STRING,
RESTWORK TYPE STRING,
DONE TYPE STRING,
SEL_CUA TYPE STRING,
SEL_LANGU TYPE STRING,
SEL_FUNC TYPE STRING,
SEL_HANDL TYPE STRING,
SEL_DOCU TYPE STRING,
SEL_OTHER TYPE STRING,
SEL_STEXT TYPE STRING,
FDATE TYPE STRING,
FUSER TYPE STRING,
LDATE TYPE STRING,
LUSER TYPE STRING,
CATTPROT TYPE STRING,
CATTLNUM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TSTATH_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_TSTATH_STR-DOC_CLS sy-vline 
WA_TSTATH_STR-DOC_OBJ sy-vline 
WA_TSTATH_STR-PROJECT sy-vline 
WA_TSTATH_STR-VIEWNAME sy-vline 
WA_TSTATH_STR-OUTLINE sy-vline 
WA_TSTATH_STR-STATUS sy-vline 
WA_TSTATH_STR-PLANSTART sy-vline 
WA_TSTATH_STR-PLANEND sy-vline 
WA_TSTATH_STR-PLANDUR sy-vline 
WA_TSTATH_STR-ACTULSTART sy-vline 
WA_TSTATH_STR-ACTULEND sy-vline 
WA_TSTATH_STR-ACTULDUR sy-vline 
WA_TSTATH_STR-RESTWORK sy-vline 
WA_TSTATH_STR-DONE sy-vline 
WA_TSTATH_STR-SEL_CUA sy-vline 
WA_TSTATH_STR-SEL_LANGU sy-vline 
WA_TSTATH_STR-SEL_FUNC sy-vline 
WA_TSTATH_STR-SEL_HANDL sy-vline 
WA_TSTATH_STR-SEL_DOCU sy-vline 
WA_TSTATH_STR-SEL_OTHER sy-vline 
WA_TSTATH_STR-SEL_STEXT sy-vline 
WA_TSTATH_STR-FDATE sy-vline 
WA_TSTATH_STR-FUSER sy-vline 
WA_TSTATH_STR-LDATE sy-vline 
WA_TSTATH_STR-LUSER sy-vline 
WA_TSTATH_STR-CATTPROT sy-vline 
WA_TSTATH_STR-CATTLNUM sy-vline      INTO ld_text SEPARATED BY SPACE.

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