ABAP Select data from SAP table P20_ALTINN2_ERC into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P20_ALTINN2_ERC 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 P20_ALTINN2_ERC. 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 P20_ALTINN2_ERC 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_P20_ALTINN2_ERC TYPE STANDARD TABLE OF P20_ALTINN2_ERC,
      WA_P20_ALTINN2_ERC TYPE P20_ALTINN2_ERC,
      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: <P20_ALTINN2_ERC> TYPE P20_ALTINN2_ERC.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P20_ALTINN2_ERC.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P20_ALTINN2_ERC
  INTO TABLE IT_P20_ALTINN2_ERC.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P20_ALTINN2_ERC
*  INTO TABLE @DATA(IT_P20_ALTINN2_ERC2).
*--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_P20_ALTINN2_ERC INDEX 1 INTO DATA(WA_P20_ALTINN2_ERC2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P20_ALTINN2_ERC ASSIGNING <P20_ALTINN2_ERC>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P20_ALTINN2_ERC>-RKEY = 1.
<P20_ALTINN2_ERC>-TERMIN = 1.
<P20_ALTINN2_ERC>-TYEAR = 1.
<P20_ALTINN2_ERC>-REPNR = 1.
<P20_ALTINN2_ERC>-SEQNR = 1.

ENDLOOP.

LOOP AT IT_P20_ALTINN2_ERC INTO WA_P20_ALTINN2_ERC.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P20_ALTINN2_ERC-ERC, sy-vline,
  WA_P20_ALTINN2_ERC-GENRAL_INFO, sy-vline,
  WA_P20_ALTINN2_ERC-TERMIN, sy-vline,
  WA_P20_ALTINN2_ERC-ERYEAR, sy-vline,
  WA_P20_ALTINN2_ERC-EMPR_MUNICC, sy-vline,
  WA_P20_ALTINN2_ERC-REPNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P20_ALTINN2_ERC 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_P20_ALTINN2_ERC 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_P20_ALTINN2_ERC INTO WA_P20_ALTINN2_ERC.


*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_P20_ALTINN2_ERC_STR, 
RKEY TYPE STRING,
TERMIN TYPE STRING,
TYEAR TYPE STRING,
REPNR TYPE STRING,
SEQNR TYPE STRING,
ERC TYPE STRING,
GENRAL_INFO TYPE STRING,
TERMIN TYPE STRING,
ERYEAR TYPE STRING,
EMPR_MUNICC TYPE STRING,
REPNR TYPE STRING,
EMPR_MUNICC_NAME TYPE STRING,
ALTIN_STAT TYPE STRING,
SPECIAL_GRPS TYPE STRING,
STATS TYPE STRING,
RBUNF TYPE STRING,
TILS TYPE STRING,
UTL1_ERC_BASIS TYPE STRING,
UTL1_CALC_ERC TYPE STRING,
UTL2_MONTHS TYPE STRING,
UTL2_RATE TYPE STRING,
ERC_TAB TYPE STRING,
TAX_TAB TYPE STRING,
RESULT_SUM TYPE STRING,
SUM_ERCBASIS_NOR TYPE STRING,
SUM_REIM TYPE STRING,
SUM_PENS TYPE STRING,
REST_BUNDFRAG TYPE STRING,
SUM_ERC TYPE STRING,
SUM_ADTAX TYPE STRING,
BATCH TYPE STRING,
BATCH_ID TYPE STRING,
ENTSY_ID TYPE STRING,
PASSWORD TYPE STRING,
PARTICI_ID TYPE STRING,
SENDERS_REF TYPE STRING,
COMPLETED TYPE STRING,
LOCKED TYPE STRING,
SVAL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P20_ALTINN2_ERC_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_P20_ALTINN2_ERC_STR-RKEY sy-vline 
WA_P20_ALTINN2_ERC_STR-TERMIN sy-vline 
WA_P20_ALTINN2_ERC_STR-TYEAR sy-vline 
WA_P20_ALTINN2_ERC_STR-REPNR sy-vline 
WA_P20_ALTINN2_ERC_STR-SEQNR sy-vline 
WA_P20_ALTINN2_ERC_STR-ERC sy-vline 
WA_P20_ALTINN2_ERC_STR-GENRAL_INFO sy-vline 
WA_P20_ALTINN2_ERC_STR-TERMIN sy-vline 
WA_P20_ALTINN2_ERC_STR-ERYEAR sy-vline 
WA_P20_ALTINN2_ERC_STR-EMPR_MUNICC sy-vline 
WA_P20_ALTINN2_ERC_STR-REPNR sy-vline 
WA_P20_ALTINN2_ERC_STR-EMPR_MUNICC_NAME sy-vline 
WA_P20_ALTINN2_ERC_STR-ALTIN_STAT sy-vline 
WA_P20_ALTINN2_ERC_STR-SPECIAL_GRPS sy-vline 
WA_P20_ALTINN2_ERC_STR-STATS sy-vline 
WA_P20_ALTINN2_ERC_STR-RBUNF sy-vline 
WA_P20_ALTINN2_ERC_STR-TILS sy-vline 
WA_P20_ALTINN2_ERC_STR-UTL1_ERC_BASIS sy-vline 
WA_P20_ALTINN2_ERC_STR-UTL1_CALC_ERC sy-vline 
WA_P20_ALTINN2_ERC_STR-UTL2_MONTHS sy-vline 
WA_P20_ALTINN2_ERC_STR-UTL2_RATE sy-vline 
WA_P20_ALTINN2_ERC_STR-ERC_TAB sy-vline 
WA_P20_ALTINN2_ERC_STR-TAX_TAB sy-vline 
WA_P20_ALTINN2_ERC_STR-RESULT_SUM sy-vline 
WA_P20_ALTINN2_ERC_STR-SUM_ERCBASIS_NOR sy-vline 
WA_P20_ALTINN2_ERC_STR-SUM_REIM sy-vline 
WA_P20_ALTINN2_ERC_STR-SUM_PENS sy-vline 
WA_P20_ALTINN2_ERC_STR-REST_BUNDFRAG sy-vline 
WA_P20_ALTINN2_ERC_STR-SUM_ERC sy-vline 
WA_P20_ALTINN2_ERC_STR-SUM_ADTAX sy-vline 
WA_P20_ALTINN2_ERC_STR-BATCH sy-vline 
WA_P20_ALTINN2_ERC_STR-BATCH_ID sy-vline 
WA_P20_ALTINN2_ERC_STR-ENTSY_ID sy-vline 
WA_P20_ALTINN2_ERC_STR-PASSWORD sy-vline 
WA_P20_ALTINN2_ERC_STR-PARTICI_ID sy-vline 
WA_P20_ALTINN2_ERC_STR-SENDERS_REF sy-vline 
WA_P20_ALTINN2_ERC_STR-COMPLETED sy-vline 
WA_P20_ALTINN2_ERC_STR-LOCKED sy-vline 
WA_P20_ALTINN2_ERC_STR-SVAL sy-vline      INTO ld_text SEPARATED BY SPACE.

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