ABAP Select data from SAP table TCHS_HD_PERSISTENCE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TCHS_HD_PERSISTENCE
*  INTO TABLE @DATA(IT_TCHS_HD_PERSISTENCE2).
*--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_TCHS_HD_PERSISTENCE INDEX 1 INTO DATA(WA_TCHS_HD_PERSISTENCE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TCHS_HD_PERSISTENCE>-OS_GUID = 1.
<TCHS_HD_PERSISTENCE>-BUKRS = 1.
<TCHS_HD_PERSISTENCE>-HD_NUMBER = 1.
<TCHS_HD_PERSISTENCE>-VERSION_NO = 1.
<TCHS_HD_PERSISTENCE>-VALUATION_AREA = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TCHS_HD_PERSISTENCE-VALID_FROM, sy-vline,
  WA_TCHS_HD_PERSISTENCE-PLANNERID, sy-vline,
  WA_TCHS_HD_PERSISTENCE-HEDGE_ID, sy-vline,
  WA_TCHS_HD_PERSISTENCE-EXPOSUREID, sy-vline,
  WA_TCHS_HD_PERSISTENCE-RFHA, sy-vline,
  WA_TCHS_HD_PERSISTENCE-TR_ACC_CODE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TCHS_HD_PERSISTENCE 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_TCHS_HD_PERSISTENCE 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_TCHS_HD_PERSISTENCE INTO WA_TCHS_HD_PERSISTENCE.


*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 ALPHA, internal->external for field HD_NUMBER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TCHS_HD_PERSISTENCE-HD_NUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TCHS_HD_PERSISTENCE-HD_NUMBER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PLANNERID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TCHS_HD_PERSISTENCE-PLANNERID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TCHS_HD_PERSISTENCE-PLANNERID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RFHA
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TCHS_HD_PERSISTENCE-RFHA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TCHS_HD_PERSISTENCE-RFHA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field HREL_NUMBER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TCHS_HD_PERSISTENCE-HREL_NUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TCHS_HD_PERSISTENCE-HREL_NUMBER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field FISCAL_YEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_TCHS_HD_PERSISTENCE-FISCAL_YEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TCHS_HD_PERSISTENCE-FISCAL_YEAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field HITEM_NUMBER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TCHS_HD_PERSISTENCE-HITEM_NUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TCHS_HD_PERSISTENCE-HITEM_NUMBER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field HINST_NUMBER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TCHS_HD_PERSISTENCE-HINST_NUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TCHS_HD_PERSISTENCE-HINST_NUMBER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PARTNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TCHS_HD_PERSISTENCE-PARTNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TCHS_HD_PERSISTENCE-PARTNR.
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_TCHS_HD_PERSISTENCE_STR, 
OS_GUID TYPE STRING,
BUKRS TYPE STRING,
HD_NUMBER TYPE STRING,
VERSION_NO TYPE STRING,
VALUATION_AREA TYPE STRING,
VALID_FROM TYPE STRING,
PLANNERID TYPE STRING,
HEDGE_ID TYPE STRING,
EXPOSUREID TYPE STRING,
RFHA TYPE STRING,
TR_ACC_CODE TYPE STRING,
HREL_NUMBER TYPE STRING,
FISCAL_YEAR TYPE STRING,
HITEM_NUMBER TYPE STRING,
HINST_NUMBER TYPE STRING,
BUSTRANSID TYPE STRING,
OBJNR TYPE STRING,
LOG_GUID TYPE STRING,
CREATED_BY TYPE STRING,
CREATION_DT TYPE STRING,
CREATION_TIME TYPE STRING,
CHANGED_BY TYPE STRING,
CHANGED_DT TYPE STRING,
CHANGED_TIME TYPE STRING,
RPORTB TYPE STRING,
RDEALER TYPE STRING,
PARTNR TYPE STRING,
WAEHRUNG TYPE STRING,
RANTYP TYPE STRING,
SANLF TYPE STRING,
SGSART TYPE STRING,
GNUMMER TYPE STRING,
SFHAART TYPE STRING,
SFGZUSTT TYPE STRING,
RLDEPO TYPE STRING,
MT_COND TYPE STRING,
MT_COND_FOR TYPE STRING,
MT_FGET TYPE STRING,
MT_BEWEG_CF TYPE STRING,
MT_BEWEG_CTYFLWS TYPE STRING,
MT_OPTION TYPE STRING,
MT_COND_OLD TYPE STRING,
MT_COND_FOR_OLD TYPE STRING,
MT_FGET_OLD TYPE STRING,
MT_BEWEG_CF_OLD TYPE STRING,
MT_BEWEG_CTYFLWS_OLD TYPE STRING,
MT_OPTION_OLD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TCHS_HD_PERSISTENCE_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_TCHS_HD_PERSISTENCE_STR-OS_GUID sy-vline 
WA_TCHS_HD_PERSISTENCE_STR-BUKRS sy-vline 
WA_TCHS_HD_PERSISTENCE_STR-HD_NUMBER sy-vline 
WA_TCHS_HD_PERSISTENCE_STR-VERSION_NO sy-vline 
WA_TCHS_HD_PERSISTENCE_STR-VALUATION_AREA sy-vline 
WA_TCHS_HD_PERSISTENCE_STR-VALID_FROM sy-vline 
WA_TCHS_HD_PERSISTENCE_STR-PLANNERID sy-vline 
WA_TCHS_HD_PERSISTENCE_STR-HEDGE_ID sy-vline 
WA_TCHS_HD_PERSISTENCE_STR-EXPOSUREID sy-vline 
WA_TCHS_HD_PERSISTENCE_STR-RFHA sy-vline 
WA_TCHS_HD_PERSISTENCE_STR-TR_ACC_CODE sy-vline 
WA_TCHS_HD_PERSISTENCE_STR-HREL_NUMBER sy-vline 
WA_TCHS_HD_PERSISTENCE_STR-FISCAL_YEAR sy-vline 
WA_TCHS_HD_PERSISTENCE_STR-HITEM_NUMBER sy-vline 
WA_TCHS_HD_PERSISTENCE_STR-HINST_NUMBER sy-vline 
WA_TCHS_HD_PERSISTENCE_STR-BUSTRANSID sy-vline 
WA_TCHS_HD_PERSISTENCE_STR-OBJNR sy-vline 
WA_TCHS_HD_PERSISTENCE_STR-LOG_GUID sy-vline 
WA_TCHS_HD_PERSISTENCE_STR-CREATED_BY sy-vline 
WA_TCHS_HD_PERSISTENCE_STR-CREATION_DT sy-vline 
WA_TCHS_HD_PERSISTENCE_STR-CREATION_TIME sy-vline 
WA_TCHS_HD_PERSISTENCE_STR-CHANGED_BY sy-vline 
WA_TCHS_HD_PERSISTENCE_STR-CHANGED_DT sy-vline 
WA_TCHS_HD_PERSISTENCE_STR-CHANGED_TIME sy-vline 
WA_TCHS_HD_PERSISTENCE_STR-RPORTB sy-vline 
WA_TCHS_HD_PERSISTENCE_STR-RDEALER sy-vline 
WA_TCHS_HD_PERSISTENCE_STR-PARTNR sy-vline 
WA_TCHS_HD_PERSISTENCE_STR-WAEHRUNG sy-vline 
WA_TCHS_HD_PERSISTENCE_STR-RANTYP sy-vline 
WA_TCHS_HD_PERSISTENCE_STR-SANLF sy-vline 
WA_TCHS_HD_PERSISTENCE_STR-SGSART sy-vline 
WA_TCHS_HD_PERSISTENCE_STR-GNUMMER sy-vline 
WA_TCHS_HD_PERSISTENCE_STR-SFHAART sy-vline 
WA_TCHS_HD_PERSISTENCE_STR-SFGZUSTT sy-vline 
WA_TCHS_HD_PERSISTENCE_STR-RLDEPO sy-vline 
WA_TCHS_HD_PERSISTENCE_STR-MT_COND sy-vline 
WA_TCHS_HD_PERSISTENCE_STR-MT_COND_FOR sy-vline 
WA_TCHS_HD_PERSISTENCE_STR-MT_FGET sy-vline 
WA_TCHS_HD_PERSISTENCE_STR-MT_BEWEG_CF sy-vline 
WA_TCHS_HD_PERSISTENCE_STR-MT_BEWEG_CTYFLWS sy-vline 
WA_TCHS_HD_PERSISTENCE_STR-MT_OPTION sy-vline 
WA_TCHS_HD_PERSISTENCE_STR-MT_COND_OLD sy-vline 
WA_TCHS_HD_PERSISTENCE_STR-MT_COND_FOR_OLD sy-vline 
WA_TCHS_HD_PERSISTENCE_STR-MT_FGET_OLD sy-vline 
WA_TCHS_HD_PERSISTENCE_STR-MT_BEWEG_CF_OLD sy-vline 
WA_TCHS_HD_PERSISTENCE_STR-MT_BEWEG_CTYFLWS_OLD sy-vline 
WA_TCHS_HD_PERSISTENCE_STR-MT_OPTION_OLD sy-vline      INTO ld_text SEPARATED BY SPACE.

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