ABAP Select data from SAP table /PF1/STR_TCHN_INST_DB into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /PF1/STR_TCHN_INST_DB 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 /PF1/STR_TCHN_INST_DB. 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 /PF1/STR_TCHN_INST_DB 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_/PF1/STR_TCHN_INST_DB TYPE STANDARD TABLE OF /PF1/STR_TCHN_INST_DB,
      WA_/PF1/STR_TCHN_INST_DB TYPE /PF1/STR_TCHN_INST_DB,
      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: </PF1/STR_TCHN_INST_DB> TYPE /PF1/STR_TCHN_INST_DB.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_/PF1/STR_TCHN_INST_DB.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /PF1/STR_TCHN_INST_DB
  INTO TABLE IT_/PF1/STR_TCHN_INST_DB.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /PF1/STR_TCHN_INST_DB
*  INTO TABLE @DATA(IT_/PF1/STR_TCHN_INST_DB2).
*--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_/PF1/STR_TCHN_INST_DB INDEX 1 INTO DATA(WA_/PF1/STR_TCHN_INST_DB2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/PF1/STR_TCHN_INST_DB ASSIGNING </PF1/STR_TCHN_INST_DB>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</PF1/STR_TCHN_INST_DB>-CLIENT = 1.
</PF1/STR_TCHN_INST_DB>-CLEARING_AREA = 1.
</PF1/STR_TCHN_INST_DB>-PI_DATE = 1.
</PF1/STR_TCHN_INST_DB>-PI_NO = 1.
</PF1/STR_TCHN_INST_DB>-TCHN_POSITION = 1.

ENDLOOP.

LOOP AT IT_/PF1/STR_TCHN_INST_DB INTO WA_/PF1/STR_TCHN_INST_DB.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/PF1/STR_TCHN_INST_DB-BIC, sy-vline,
  WA_/PF1/STR_TCHN_INST_DB-TCHN_BIC_INFO, sy-vline,
  WA_/PF1/STR_TCHN_INST_DB-CRUSR, sy-vline,
  WA_/PF1/STR_TCHN_INST_DB-CRDAT, sy-vline,
  WA_/PF1/STR_TCHN_INST_DB-CRTIM, sy-vline,
  WA_/PF1/STR_TCHN_INST_DB-CHUSR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/PF1/STR_TCHN_INST_DB 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_/PF1/STR_TCHN_INST_DB 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_/PF1/STR_TCHN_INST_DB INTO WA_/PF1/STR_TCHN_INST_DB.


*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_/PF1/STR_TCHN_INST_DB_STR, 
CLIENT TYPE STRING,
CLEARING_AREA TYPE STRING,
PI_DATE TYPE STRING,
PI_NO TYPE STRING,
TCHN_POSITION TYPE STRING,
BIC TYPE STRING,
TCHN_BIC_INFO TYPE STRING,
CRUSR TYPE STRING,
CRDAT TYPE STRING,
CRTIM TYPE STRING,
CHUSR TYPE STRING,
CHDAT TYPE STRING,
CHTIM TYPE STRING,
RLUSR TYPE STRING,
RLDAT TYPE STRING,
RLTIM TYPE STRING,
SEGMENTATION_KEY TYPE STRING,
TIME_PART TYPE STRING,
COUNTRY TYPE STRING,
BANKKEY TYPE STRING,
NAME TYPE STRING,
OTHER_ID TYPE STRING,
OTHER_ID_CODE TYPE STRING,
OTHER_ID_PRTRY TYPE STRING,
OTHER_ID_ISSUER TYPE STRING,
ADDRESS_TYPE TYPE STRING,
DEPARTMENT TYPE STRING,
SUB_DEPARTMENT TYPE STRING,
STREETNAME TYPE STRING,
BUILDINGNUMBER TYPE STRING,
POSTALCODE TYPE STRING,
TOWNNAME TYPE STRING,
COUNTRYSUBDIV TYPE STRING,
COUNTRY_ADDR TYPE STRING,
ADDR_LINE1 TYPE STRING,
ADDR_LINE2 TYPE STRING,
ADDR_LINE3 TYPE STRING,
ADDR_LINE4 TYPE STRING,
ADDR_LINE5 TYPE STRING,
ADDR_LINE6 TYPE STRING,
ADDR_LINE7 TYPE STRING,
CLR_SYS_CODE TYPE STRING,
CLR_SYS_PRTRY TYPE STRING,
CLR_SYS_ID TYPE STRING,
IBAN TYPE STRING,
ACCT_NO TYPE STRING,
ACCT_CODE TYPE STRING,
ACCT_PRTRY TYPE STRING,
ACCT_ISSUER TYPE STRING,
ACCT_TYPE_CD TYPE STRING,
ACCT_TYPE_PRTRY TYPE STRING,
ACCT_CUR TYPE STRING,
HOLDER TYPE STRING,
BANK_TYPE TYPE STRING,
STATE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/PF1/STR_TCHN_INST_DB_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_/PF1/STR_TCHN_INST_DB_STR-CLIENT sy-vline 
WA_/PF1/STR_TCHN_INST_DB_STR-CLEARING_AREA sy-vline 
WA_/PF1/STR_TCHN_INST_DB_STR-PI_DATE sy-vline 
WA_/PF1/STR_TCHN_INST_DB_STR-PI_NO sy-vline 
WA_/PF1/STR_TCHN_INST_DB_STR-TCHN_POSITION sy-vline 
WA_/PF1/STR_TCHN_INST_DB_STR-BIC sy-vline 
WA_/PF1/STR_TCHN_INST_DB_STR-TCHN_BIC_INFO sy-vline 
WA_/PF1/STR_TCHN_INST_DB_STR-CRUSR sy-vline 
WA_/PF1/STR_TCHN_INST_DB_STR-CRDAT sy-vline 
WA_/PF1/STR_TCHN_INST_DB_STR-CRTIM sy-vline 
WA_/PF1/STR_TCHN_INST_DB_STR-CHUSR sy-vline 
WA_/PF1/STR_TCHN_INST_DB_STR-CHDAT sy-vline 
WA_/PF1/STR_TCHN_INST_DB_STR-CHTIM sy-vline 
WA_/PF1/STR_TCHN_INST_DB_STR-RLUSR sy-vline 
WA_/PF1/STR_TCHN_INST_DB_STR-RLDAT sy-vline 
WA_/PF1/STR_TCHN_INST_DB_STR-RLTIM sy-vline 
WA_/PF1/STR_TCHN_INST_DB_STR-SEGMENTATION_KEY sy-vline 
WA_/PF1/STR_TCHN_INST_DB_STR-TIME_PART sy-vline 
WA_/PF1/STR_TCHN_INST_DB_STR-COUNTRY sy-vline 
WA_/PF1/STR_TCHN_INST_DB_STR-BANKKEY sy-vline 
WA_/PF1/STR_TCHN_INST_DB_STR-NAME sy-vline 
WA_/PF1/STR_TCHN_INST_DB_STR-OTHER_ID sy-vline 
WA_/PF1/STR_TCHN_INST_DB_STR-OTHER_ID_CODE sy-vline 
WA_/PF1/STR_TCHN_INST_DB_STR-OTHER_ID_PRTRY sy-vline 
WA_/PF1/STR_TCHN_INST_DB_STR-OTHER_ID_ISSUER sy-vline 
WA_/PF1/STR_TCHN_INST_DB_STR-ADDRESS_TYPE sy-vline 
WA_/PF1/STR_TCHN_INST_DB_STR-DEPARTMENT sy-vline 
WA_/PF1/STR_TCHN_INST_DB_STR-SUB_DEPARTMENT sy-vline 
WA_/PF1/STR_TCHN_INST_DB_STR-STREETNAME sy-vline 
WA_/PF1/STR_TCHN_INST_DB_STR-BUILDINGNUMBER sy-vline 
WA_/PF1/STR_TCHN_INST_DB_STR-POSTALCODE sy-vline 
WA_/PF1/STR_TCHN_INST_DB_STR-TOWNNAME sy-vline 
WA_/PF1/STR_TCHN_INST_DB_STR-COUNTRYSUBDIV sy-vline 
WA_/PF1/STR_TCHN_INST_DB_STR-COUNTRY_ADDR sy-vline 
WA_/PF1/STR_TCHN_INST_DB_STR-ADDR_LINE1 sy-vline 
WA_/PF1/STR_TCHN_INST_DB_STR-ADDR_LINE2 sy-vline 
WA_/PF1/STR_TCHN_INST_DB_STR-ADDR_LINE3 sy-vline 
WA_/PF1/STR_TCHN_INST_DB_STR-ADDR_LINE4 sy-vline 
WA_/PF1/STR_TCHN_INST_DB_STR-ADDR_LINE5 sy-vline 
WA_/PF1/STR_TCHN_INST_DB_STR-ADDR_LINE6 sy-vline 
WA_/PF1/STR_TCHN_INST_DB_STR-ADDR_LINE7 sy-vline 
WA_/PF1/STR_TCHN_INST_DB_STR-CLR_SYS_CODE sy-vline 
WA_/PF1/STR_TCHN_INST_DB_STR-CLR_SYS_PRTRY sy-vline 
WA_/PF1/STR_TCHN_INST_DB_STR-CLR_SYS_ID sy-vline 
WA_/PF1/STR_TCHN_INST_DB_STR-IBAN sy-vline 
WA_/PF1/STR_TCHN_INST_DB_STR-ACCT_NO sy-vline 
WA_/PF1/STR_TCHN_INST_DB_STR-ACCT_CODE sy-vline 
WA_/PF1/STR_TCHN_INST_DB_STR-ACCT_PRTRY sy-vline 
WA_/PF1/STR_TCHN_INST_DB_STR-ACCT_ISSUER sy-vline 
WA_/PF1/STR_TCHN_INST_DB_STR-ACCT_TYPE_CD sy-vline 
WA_/PF1/STR_TCHN_INST_DB_STR-ACCT_TYPE_PRTRY sy-vline 
WA_/PF1/STR_TCHN_INST_DB_STR-ACCT_CUR sy-vline 
WA_/PF1/STR_TCHN_INST_DB_STR-HOLDER sy-vline 
WA_/PF1/STR_TCHN_INST_DB_STR-BANK_TYPE sy-vline 
WA_/PF1/STR_TCHN_INST_DB_STR-STATE sy-vline      INTO ld_text SEPARATED BY SPACE.

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