ABAP Select data from SAP table TMSTLOCKNP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TMSTLOCKNP
*  INTO TABLE @DATA(IT_TMSTLOCKNP2).
*--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_TMSTLOCKNP INDEX 1 INTO DATA(WA_TMSTLOCKNP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TMSTLOCKNP>-PROJECT = 1.
<TMSTLOCKNP>-TARCLI = 1.
<TMSTLOCKNP>-SYSNAM = 1.
<TMSTLOCKNP>-JOBID = 1.
<TMSTLOCKNP>-TPSTATID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TMSTLOCKNP-COMMAND, sy-vline,
  WA_TMSTLOCKNP-TPOFFLINE, sy-vline,
  WA_TMSTLOCKNP-OWNER, sy-vline,
  WA_TMSTLOCKNP-TIMESTAMP, sy-vline,
  WA_TMSTLOCKNP-UMODES, sy-vline,
  WA_TMSTLOCKNP-IGN_PREDEC, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TMSTLOCKNP 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_TMSTLOCKNP 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_TMSTLOCKNP INTO WA_TMSTLOCKNP.


*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_TMSTLOCKNP_STR, 
PROJECT TYPE STRING,
TARCLI TYPE STRING,
SYSNAM TYPE STRING,
JOBID TYPE STRING,
TPSTATID TYPE STRING,
COMMAND TYPE STRING,
TPOFFLINE TYPE STRING,
OWNER TYPE STRING,
TIMESTAMP TYPE STRING,
UMODES TYPE STRING,
IGN_PREDEC TYPE STRING,
IMP_SUBSET TYPE STRING,
TP_OFFLINE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TMSTLOCKNP_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_TMSTLOCKNP_STR-PROJECT sy-vline 
WA_TMSTLOCKNP_STR-TARCLI sy-vline 
WA_TMSTLOCKNP_STR-SYSNAM sy-vline 
WA_TMSTLOCKNP_STR-JOBID sy-vline 
WA_TMSTLOCKNP_STR-TPSTATID sy-vline 
WA_TMSTLOCKNP_STR-COMMAND sy-vline 
WA_TMSTLOCKNP_STR-TPOFFLINE sy-vline 
WA_TMSTLOCKNP_STR-OWNER sy-vline 
WA_TMSTLOCKNP_STR-TIMESTAMP sy-vline 
WA_TMSTLOCKNP_STR-UMODES sy-vline 
WA_TMSTLOCKNP_STR-IGN_PREDEC sy-vline 
WA_TMSTLOCKNP_STR-IMP_SUBSET sy-vline 
WA_TMSTLOCKNP_STR-TP_OFFLINE sy-vline      INTO ld_text SEPARATED BY SPACE.

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