ABAP Select data from SAP table PSG_LAYOUT_KET into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PSG_LAYOUT_KET
*  INTO TABLE @DATA(IT_PSG_LAYOUT_KET2).
*--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_PSG_LAYOUT_KET INDEX 1 INTO DATA(WA_PSG_LAYOUT_KET2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PSG_LAYOUT_KET>-COMPANY_NAME_LB = 1.
<PSG_LAYOUT_KET>-JOB_DUTY_LB = 1.
<PSG_LAYOUT_KET>-EMPLOYEE_NAME_LB = 1.
<PSG_LAYOUT_KET>-FULL_TIME_LB = 1.
<PSG_LAYOUT_KET>-PART_TIME_LB = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PSG_LAYOUT_KET-EMPLOYEE_NRIC_LB, sy-vline,
  WA_PSG_LAYOUT_KET-DURATION_LB, sy-vline,
  WA_PSG_LAYOUT_KET-START_DATE_LB, sy-vline,
  WA_PSG_LAYOUT_KET-WORK_PLACE_LB, sy-vline,
  WA_PSG_LAYOUT_KET-WORKING_HOURS_LB, sy-vline,
  WA_PSG_LAYOUT_KET-WORKING_DAYS_LB, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PSG_LAYOUT_KET 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_PSG_LAYOUT_KET 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_PSG_LAYOUT_KET INTO WA_PSG_LAYOUT_KET.


*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_PSG_LAYOUT_KET_STR, 
COMPANY_NAME_LB TYPE STRING,
JOB_DUTY_LB TYPE STRING,
EMPLOYEE_NAME_LB TYPE STRING,
FULL_TIME_LB TYPE STRING,
PART_TIME_LB TYPE STRING,
EMPLOYEE_NRIC_LB TYPE STRING,
DURATION_LB TYPE STRING,
START_DATE_LB TYPE STRING,
WORK_PLACE_LB TYPE STRING,
WORKING_HOURS_LB TYPE STRING,
WORKING_DAYS_LB TYPE STRING,
REST_DAYS_LB TYPE STRING,
SALARY_PERIOD_LB TYPE STRING,
PERIOD_LB TYPE STRING,
PAY_DATE_LB TYPE STRING,
OT_PAY_DATE_LB TYPE STRING,
OT_PAY_PERIOD_LB TYPE STRING,
BASIC_SALARY_LB TYPE STRING,
OT_RATE_LB TYPE STRING,
ALLOWANCES_LB TYPE STRING,
DEDUCTIONS_LB TYPE STRING,
AW_ITEM_LB TYPE STRING,
AW_AMT_LB TYPE STRING,
DE_ITEM_LB TYPE STRING,
DE_AMT_LB TYPE STRING,
TOTAL_ALLOWANCLB TYPE STRING,
TOTAL_DEDUCTIOLB TYPE STRING,
OTHER_SALARY_LB TYPE STRING,
CPF_CONTR_LB TYPE STRING,
TYPE_OF_LEAVE_LB TYPE STRING,
ANNUAL_LEAVE_LB TYPE STRING,
SICK_LEAVE_LB TYPE STRING,
HOS_LEAVE_LB TYPE STRING,
OTHER_LEAVE_LB TYPE STRING,
PAID_MEDICAL_LB TYPE STRING,
OTHR_MEDICAL_LB TYPE STRING,
PROBATION_LENGLB TYPE STRING,
PROBATION_STATLB TYPE STRING,
PROBATION_END_LB TYPE STRING,
NOTICE_PERIOD_LB TYPE STRING,
TITLE_LB TYPE STRING,
SECTIONA_LB TYPE STRING,
SECTIONB_LB TYPE STRING,
SECTIONC_LB TYPE STRING,
SECTIOND_LB TYPE STRING,
SECTIONE_LB TYPE STRING,
END_LB TYPE STRING,
PERIOD1_LB TYPE STRING,
PERIOD2_LB TYPE STRING,
PERIOD3_LB TYPE STRING,
PERIOD4_LB TYPE STRING,
PERIOD5_LB TYPE STRING,
OT_PERIOD1_LB TYPE STRING,
OT_PERIOD2_LB TYPE STRING,
OT_PERIOD3_LB TYPE STRING,
OT_PERIOD4_LB TYPE STRING,
OT_PERIOD5_LB TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PSG_LAYOUT_KET_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_PSG_LAYOUT_KET_STR-COMPANY_NAME_LB sy-vline 
WA_PSG_LAYOUT_KET_STR-JOB_DUTY_LB sy-vline 
WA_PSG_LAYOUT_KET_STR-EMPLOYEE_NAME_LB sy-vline 
WA_PSG_LAYOUT_KET_STR-FULL_TIME_LB sy-vline 
WA_PSG_LAYOUT_KET_STR-PART_TIME_LB sy-vline 
WA_PSG_LAYOUT_KET_STR-EMPLOYEE_NRIC_LB sy-vline 
WA_PSG_LAYOUT_KET_STR-DURATION_LB sy-vline 
WA_PSG_LAYOUT_KET_STR-START_DATE_LB sy-vline 
WA_PSG_LAYOUT_KET_STR-WORK_PLACE_LB sy-vline 
WA_PSG_LAYOUT_KET_STR-WORKING_HOURS_LB sy-vline 
WA_PSG_LAYOUT_KET_STR-WORKING_DAYS_LB sy-vline 
WA_PSG_LAYOUT_KET_STR-REST_DAYS_LB sy-vline 
WA_PSG_LAYOUT_KET_STR-SALARY_PERIOD_LB sy-vline 
WA_PSG_LAYOUT_KET_STR-PERIOD_LB sy-vline 
WA_PSG_LAYOUT_KET_STR-PAY_DATE_LB sy-vline 
WA_PSG_LAYOUT_KET_STR-OT_PAY_DATE_LB sy-vline 
WA_PSG_LAYOUT_KET_STR-OT_PAY_PERIOD_LB sy-vline 
WA_PSG_LAYOUT_KET_STR-BASIC_SALARY_LB sy-vline 
WA_PSG_LAYOUT_KET_STR-OT_RATE_LB sy-vline 
WA_PSG_LAYOUT_KET_STR-ALLOWANCES_LB sy-vline 
WA_PSG_LAYOUT_KET_STR-DEDUCTIONS_LB sy-vline 
WA_PSG_LAYOUT_KET_STR-AW_ITEM_LB sy-vline 
WA_PSG_LAYOUT_KET_STR-AW_AMT_LB sy-vline 
WA_PSG_LAYOUT_KET_STR-DE_ITEM_LB sy-vline 
WA_PSG_LAYOUT_KET_STR-DE_AMT_LB sy-vline 
WA_PSG_LAYOUT_KET_STR-TOTAL_ALLOWANCLB sy-vline 
WA_PSG_LAYOUT_KET_STR-TOTAL_DEDUCTIOLB sy-vline 
WA_PSG_LAYOUT_KET_STR-OTHER_SALARY_LB sy-vline 
WA_PSG_LAYOUT_KET_STR-CPF_CONTR_LB sy-vline 
WA_PSG_LAYOUT_KET_STR-TYPE_OF_LEAVE_LB sy-vline 
WA_PSG_LAYOUT_KET_STR-ANNUAL_LEAVE_LB sy-vline 
WA_PSG_LAYOUT_KET_STR-SICK_LEAVE_LB sy-vline 
WA_PSG_LAYOUT_KET_STR-HOS_LEAVE_LB sy-vline 
WA_PSG_LAYOUT_KET_STR-OTHER_LEAVE_LB sy-vline 
WA_PSG_LAYOUT_KET_STR-PAID_MEDICAL_LB sy-vline 
WA_PSG_LAYOUT_KET_STR-OTHR_MEDICAL_LB sy-vline 
WA_PSG_LAYOUT_KET_STR-PROBATION_LENGLB sy-vline 
WA_PSG_LAYOUT_KET_STR-PROBATION_STATLB sy-vline 
WA_PSG_LAYOUT_KET_STR-PROBATION_END_LB sy-vline 
WA_PSG_LAYOUT_KET_STR-NOTICE_PERIOD_LB sy-vline 
WA_PSG_LAYOUT_KET_STR-TITLE_LB sy-vline 
WA_PSG_LAYOUT_KET_STR-SECTIONA_LB sy-vline 
WA_PSG_LAYOUT_KET_STR-SECTIONB_LB sy-vline 
WA_PSG_LAYOUT_KET_STR-SECTIONC_LB sy-vline 
WA_PSG_LAYOUT_KET_STR-SECTIOND_LB sy-vline 
WA_PSG_LAYOUT_KET_STR-SECTIONE_LB sy-vline 
WA_PSG_LAYOUT_KET_STR-END_LB sy-vline 
WA_PSG_LAYOUT_KET_STR-PERIOD1_LB sy-vline 
WA_PSG_LAYOUT_KET_STR-PERIOD2_LB sy-vline 
WA_PSG_LAYOUT_KET_STR-PERIOD3_LB sy-vline 
WA_PSG_LAYOUT_KET_STR-PERIOD4_LB sy-vline 
WA_PSG_LAYOUT_KET_STR-PERIOD5_LB sy-vline 
WA_PSG_LAYOUT_KET_STR-OT_PERIOD1_LB sy-vline 
WA_PSG_LAYOUT_KET_STR-OT_PERIOD2_LB sy-vline 
WA_PSG_LAYOUT_KET_STR-OT_PERIOD3_LB sy-vline 
WA_PSG_LAYOUT_KET_STR-OT_PERIOD4_LB sy-vline 
WA_PSG_LAYOUT_KET_STR-OT_PERIOD5_LB sy-vline      INTO ld_text SEPARATED BY SPACE.

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