ABAP Select data from SAP table UCST001 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP UCST001 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 UCST001. 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 UCST001 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_UCST001 TYPE STANDARD TABLE OF UCST001,
      WA_UCST001 TYPE UCST001,
      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: <UCST001> TYPE UCST001.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_UCST001.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM UCST001
  INTO TABLE IT_UCST001.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM UCST001
*  INTO TABLE @DATA(IT_UCST0012).
*--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_UCST001 INDEX 1 INTO DATA(WA_UCST0012).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_UCST001 ASSIGNING <UCST001>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<UCST001>-MANDT = 1.
<UCST001>-STATID = 1.
<UCST001>-STAT_TYPE = 1.
<UCST001>-SDATE = 1.
<UCST001>-STIME = 1.

ENDLOOP.

LOOP AT IT_UCST001 INTO WA_UCST001.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_UCST001-ENDDATE, sy-vline,
  WA_UCST001-ENDTIME, sy-vline,
  WA_UCST001-UNAME, sy-vline,
  WA_UCST001-AREA, sy-vline,
  WA_UCST001-TASKTYPE, sy-vline,
  WA_UCST001-TASK, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_UCST001 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_UCST001 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_UCST001 INTO WA_UCST001.


*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 GJAHR, internal->external for field FISCYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_UCST001-FISCYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_UCST001-FISCYEAR.
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_UCST001_STR, 
MANDT TYPE STRING,
STATID TYPE STRING,
STAT_TYPE TYPE STRING,
SDATE TYPE STRING,
STIME TYPE STRING,
ENDDATE TYPE STRING,
ENDTIME TYPE STRING,
UNAME TYPE STRING,
AREA TYPE STRING,
TASKTYPE TYPE STRING,
TASK TYPE STRING,
DELAYOUT TYPE STRING,
METHOD TYPE STRING,
FISCYEAR TYPE STRING,
FISCPERIOD TYPE STRING,
VERSION TYPE STRING,
REPGROUP TYPE STRING,
REPUNIT TYPE STRING,
TIME_GROSS TYPE STRING,
STATUS_CHCK_TIME TYPE STRING,
TX_READ_TIME TYPE STRING,
TX_RECS_READ TYPE STRING,
FUNC_TIME TYPE STRING,
STATUS_UPD_TIME TYPE STRING,
TX_WRITE_TIME TYPE STRING,
TX_RECS_MODIFIED TYPE STRING,
LOG_TIME TYPE STRING,
ERROR TYPE STRING,
CONTENT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_UCST001_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_UCST001_STR-MANDT sy-vline 
WA_UCST001_STR-STATID sy-vline 
WA_UCST001_STR-STAT_TYPE sy-vline 
WA_UCST001_STR-SDATE sy-vline 
WA_UCST001_STR-STIME sy-vline 
WA_UCST001_STR-ENDDATE sy-vline 
WA_UCST001_STR-ENDTIME sy-vline 
WA_UCST001_STR-UNAME sy-vline 
WA_UCST001_STR-AREA sy-vline 
WA_UCST001_STR-TASKTYPE sy-vline 
WA_UCST001_STR-TASK sy-vline 
WA_UCST001_STR-DELAYOUT sy-vline 
WA_UCST001_STR-METHOD sy-vline 
WA_UCST001_STR-FISCYEAR sy-vline 
WA_UCST001_STR-FISCPERIOD sy-vline 
WA_UCST001_STR-VERSION sy-vline 
WA_UCST001_STR-REPGROUP sy-vline 
WA_UCST001_STR-REPUNIT sy-vline 
WA_UCST001_STR-TIME_GROSS sy-vline 
WA_UCST001_STR-STATUS_CHCK_TIME sy-vline 
WA_UCST001_STR-TX_READ_TIME sy-vline 
WA_UCST001_STR-TX_RECS_READ sy-vline 
WA_UCST001_STR-FUNC_TIME sy-vline 
WA_UCST001_STR-STATUS_UPD_TIME sy-vline 
WA_UCST001_STR-TX_WRITE_TIME sy-vline 
WA_UCST001_STR-TX_RECS_MODIFIED sy-vline 
WA_UCST001_STR-LOG_TIME sy-vline 
WA_UCST001_STR-ERROR sy-vline 
WA_UCST001_STR-CONTENT sy-vline      INTO ld_text SEPARATED BY SPACE.

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