ABAP Select data from SAP table SAPWLDTTC1 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP SAPWLDTTC1 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 SAPWLDTTC1. 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 SAPWLDTTC1 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_SAPWLDTTC1 TYPE STANDARD TABLE OF SAPWLDTTC1,
      WA_SAPWLDTTC1 TYPE SAPWLDTTC1,
      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: <SAPWLDTTC1> TYPE SAPWLDTTC1.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_SAPWLDTTC1.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM SAPWLDTTC1
  INTO TABLE IT_SAPWLDTTC1.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SAPWLDTTC1
*  INTO TABLE @DATA(IT_SAPWLDTTC12).
*--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_SAPWLDTTC1 INDEX 1 INTO DATA(WA_SAPWLDTTC12).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_SAPWLDTTC1 ASSIGNING <SAPWLDTTC1>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SAPWLDTTC1>-STARTDATE = 1.
<SAPWLDTTC1>-TCODE = 1.
<SAPWLDTTC1>-FCODE = 1.
<SAPWLDTTC1>-ACCOUNT = 1.
<SAPWLDTTC1>-COUNT = 1.

ENDLOOP.

LOOP AT IT_SAPWLDTTC1 INTO WA_SAPWLDTTC1.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SAPWLDTTC1-PROCTI, sy-vline,
  WA_SAPWLDTTC1-PROCMT, sy-vline,
  WA_SAPWLDTTC1-RESPTI, sy-vline,
  WA_SAPWLDTTC1-RESPMT, sy-vline,
  WA_SAPWLDTTC1-CPUTI, sy-vline,
  WA_SAPWLDTTC1-CPUMT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_SAPWLDTTC1 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_SAPWLDTTC1 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_SAPWLDTTC1 INTO WA_SAPWLDTTC1.


*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_SAPWLDTTC1_STR, 
STARTDATE TYPE STRING,
TCODE TYPE STRING,
FCODE TYPE STRING,
ACCOUNT TYPE STRING,
COUNT TYPE STRING,
PROCTI TYPE STRING,
PROCMT TYPE STRING,
RESPTI TYPE STRING,
RESPMT TYPE STRING,
CPUTI TYPE STRING,
CPUMT TYPE STRING,
QUEUETI TYPE STRING,
QUEUEMT TYPE STRING,
ROLLWAITTI TYPE STRING,
ROLLWAITMT TYPE STRING,
DBST TYPE STRING,
DBMT TYPE STRING,
DBPRMT TYPE STRING,
READDIRBUF TYPE STRING,
BYTES TYPE STRING,
GUITIME TYPE STRING,
GUICNT TYPE STRING,
GUINETTIME TYPE STRING,
DBPCOUNT TYPE STRING,
DBPTIME TYPE STRING,
DBPAVTI TYPE STRING,
READSEQCNT TYPE STRING,
READSEQST TYPE STRING,
READSEQMT TYPE STRING,
READSEQREC TYPE STRING,
READDIRCNT TYPE STRING,
READDIRST TYPE STRING,
READDIRMT TYPE STRING,
READDIRREC TYPE STRING,
READSEQBUF TYPE STRING,
CHNGCNT TYPE STRING,
CHNGST TYPE STRING,
CHNGMT TYPE STRING,
CHNGREC TYPE STRING,
DBREQUCNT TYPE STRING,
DBREQMTI TYPE STRING,
PHYREADCNT TYPE STRING,
PHYCHNGREC TYPE STRING,
PHYDBCALLS TYPE STRING,
DBUFREADCN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SAPWLDTTC1_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_SAPWLDTTC1_STR-STARTDATE sy-vline 
WA_SAPWLDTTC1_STR-TCODE sy-vline 
WA_SAPWLDTTC1_STR-FCODE sy-vline 
WA_SAPWLDTTC1_STR-ACCOUNT sy-vline 
WA_SAPWLDTTC1_STR-COUNT sy-vline 
WA_SAPWLDTTC1_STR-PROCTI sy-vline 
WA_SAPWLDTTC1_STR-PROCMT sy-vline 
WA_SAPWLDTTC1_STR-RESPTI sy-vline 
WA_SAPWLDTTC1_STR-RESPMT sy-vline 
WA_SAPWLDTTC1_STR-CPUTI sy-vline 
WA_SAPWLDTTC1_STR-CPUMT sy-vline 
WA_SAPWLDTTC1_STR-QUEUETI sy-vline 
WA_SAPWLDTTC1_STR-QUEUEMT sy-vline 
WA_SAPWLDTTC1_STR-ROLLWAITTI sy-vline 
WA_SAPWLDTTC1_STR-ROLLWAITMT sy-vline 
WA_SAPWLDTTC1_STR-DBST sy-vline 
WA_SAPWLDTTC1_STR-DBMT sy-vline 
WA_SAPWLDTTC1_STR-DBPRMT sy-vline 
WA_SAPWLDTTC1_STR-READDIRBUF sy-vline 
WA_SAPWLDTTC1_STR-BYTES sy-vline 
WA_SAPWLDTTC1_STR-GUITIME sy-vline 
WA_SAPWLDTTC1_STR-GUICNT sy-vline 
WA_SAPWLDTTC1_STR-GUINETTIME sy-vline 
WA_SAPWLDTTC1_STR-DBPCOUNT sy-vline 
WA_SAPWLDTTC1_STR-DBPTIME sy-vline 
WA_SAPWLDTTC1_STR-DBPAVTI sy-vline 
WA_SAPWLDTTC1_STR-READSEQCNT sy-vline 
WA_SAPWLDTTC1_STR-READSEQST sy-vline 
WA_SAPWLDTTC1_STR-READSEQMT sy-vline 
WA_SAPWLDTTC1_STR-READSEQREC sy-vline 
WA_SAPWLDTTC1_STR-READDIRCNT sy-vline 
WA_SAPWLDTTC1_STR-READDIRST sy-vline 
WA_SAPWLDTTC1_STR-READDIRMT sy-vline 
WA_SAPWLDTTC1_STR-READDIRREC sy-vline 
WA_SAPWLDTTC1_STR-READSEQBUF sy-vline 
WA_SAPWLDTTC1_STR-CHNGCNT sy-vline 
WA_SAPWLDTTC1_STR-CHNGST sy-vline 
WA_SAPWLDTTC1_STR-CHNGMT sy-vline 
WA_SAPWLDTTC1_STR-CHNGREC sy-vline 
WA_SAPWLDTTC1_STR-DBREQUCNT sy-vline 
WA_SAPWLDTTC1_STR-DBREQMTI sy-vline 
WA_SAPWLDTTC1_STR-PHYREADCNT sy-vline 
WA_SAPWLDTTC1_STR-PHYCHNGREC sy-vline 
WA_SAPWLDTTC1_STR-PHYDBCALLS sy-vline 
WA_SAPWLDTTC1_STR-DBUFREADCN sy-vline      INTO ld_text SEPARATED BY SPACE.

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