ABAP Select data from SAP table ERCHV into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP ERCHV 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 ERCHV. 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 ERCHV 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_ERCHV TYPE STANDARD TABLE OF ERCHV,
      WA_ERCHV TYPE ERCHV,
      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: <ERCHV> TYPE ERCHV.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ERCHV
*  INTO TABLE @DATA(IT_ERCHV2).
*--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_ERCHV INDEX 1 INTO DATA(WA_ERCHV2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ERCHV>-MANDT = 1.
<ERCHV>-BELNR = 1.
<ERCHV>-LFDNR = 1.
<ERCHV>-VERTRAG = 1.
<ERCHV>-ANLAGE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ERCHV-SPARTE, sy-vline,
  WA_ERCHV-PERIOD, sy-vline,
  WA_ERCHV-GERAET, sy-vline,
  WA_ERCHV-EQUNR, sy-vline,
  WA_ERCHV-MATNR, sy-vline,
  WA_ERCHV-ZWNUMMER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ERCHV 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_ERCHV 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_ERCHV INTO WA_ERCHV.


*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 BELNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ERCHV-BELNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ERCHV-BELNR.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit JJ_MM, internal->external for field PERIOD
CALL FUNCTION 'CONVERSION_EXIT_JJ_MM_OUTPUT'
  EXPORTING
    input =                      WA_ERCHV-PERIOD
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ERCHV-PERIOD.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GERNR, internal->external for field GERAET
CALL FUNCTION 'CONVERSION_EXIT_GERNR_OUTPUT'
  EXPORTING
    input =                      WA_ERCHV-GERAET
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ERCHV-GERAET.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_ERCHV-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ERCHV-MATNR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit CUNIT, internal->external for field MASSBILL
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_ERCHV-MASSBILL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ERCHV-MASSBILL.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field SUBINST
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ERCHV-SUBINST
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ERCHV-SUBINST.
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_ERCHV_STR, 
MANDT TYPE STRING,
BELNR TYPE STRING,
LFDNR TYPE STRING,
VERTRAG TYPE STRING,
ANLAGE TYPE STRING,
SPARTE TYPE STRING,
PERIOD TYPE STRING,
GERAET TYPE STRING,
EQUNR TYPE STRING,
MATNR TYPE STRING,
ZWNUMMER TYPE STRING,
ABRFAKT TYPE STRING,
ZWFAKT TYPE STRING,
TEMP_AREA TYPE STRING,
GEWKEY TYPE STRING,
ERCHV_ORIG TYPE STRING,
LSNO TYPE STRING,
AB TYPE STRING,
BIS TYPE STRING,
LOGIKZW TYPE STRING,
TIMTYP TYPE STRING,
PREISTYP TYPE STRING,
PREIS TYPE STRING,
MASSBILL TYPE STRING,
ISTABLART TYPE STRING,
ISTABLARTVA TYPE STRING,
ABLESGR TYPE STRING,
ABLESGRV TYPE STRING,
OPERAND TYPE STRING,
STTARIF TYPE STRING,
BRENNWTA TYPE STRING,
ZUSTZAHL TYPE STRING,
ARTMENGE TYPE STRING,
UMFAKTOR TYPE STRING,
NETTOBTR TYPE STRING,
TWAERS TYPE STRING,
ABLBELNR TYPE STRING,
BELZEILE TYPE STRING,
ERCHV_BW_REL TYPE STRING,
SUBINST TYPE STRING,
SUBABRDATS TYPE STRING,
SUBABRVORG TYPE STRING,
I_ZWSTAND TYPE STRING,
I_ZWSTNDAB TYPE STRING,
I_ZWSTVOR TYPE STRING,
I_ABRMENGE TYPE STRING,
I_ABRMENGEVOR TYPE STRING,
I_ZWSTDIFF TYPE STRING,
ALPHNUM TYPE STRING,
COLOGRP_INST TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ERCHV_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_ERCHV_STR-MANDT sy-vline 
WA_ERCHV_STR-BELNR sy-vline 
WA_ERCHV_STR-LFDNR sy-vline 
WA_ERCHV_STR-VERTRAG sy-vline 
WA_ERCHV_STR-ANLAGE sy-vline 
WA_ERCHV_STR-SPARTE sy-vline 
WA_ERCHV_STR-PERIOD sy-vline 
WA_ERCHV_STR-GERAET sy-vline 
WA_ERCHV_STR-EQUNR sy-vline 
WA_ERCHV_STR-MATNR sy-vline 
WA_ERCHV_STR-ZWNUMMER sy-vline 
WA_ERCHV_STR-ABRFAKT sy-vline 
WA_ERCHV_STR-ZWFAKT sy-vline 
WA_ERCHV_STR-TEMP_AREA sy-vline 
WA_ERCHV_STR-GEWKEY sy-vline 
WA_ERCHV_STR-ERCHV_ORIG sy-vline 
WA_ERCHV_STR-LSNO sy-vline 
WA_ERCHV_STR-AB sy-vline 
WA_ERCHV_STR-BIS sy-vline 
WA_ERCHV_STR-LOGIKZW sy-vline 
WA_ERCHV_STR-TIMTYP sy-vline 
WA_ERCHV_STR-PREISTYP sy-vline 
WA_ERCHV_STR-PREIS sy-vline 
WA_ERCHV_STR-MASSBILL sy-vline 
WA_ERCHV_STR-ISTABLART sy-vline 
WA_ERCHV_STR-ISTABLARTVA sy-vline 
WA_ERCHV_STR-ABLESGR sy-vline 
WA_ERCHV_STR-ABLESGRV sy-vline 
WA_ERCHV_STR-OPERAND sy-vline 
WA_ERCHV_STR-STTARIF sy-vline 
WA_ERCHV_STR-BRENNWTA sy-vline 
WA_ERCHV_STR-ZUSTZAHL sy-vline 
WA_ERCHV_STR-ARTMENGE sy-vline 
WA_ERCHV_STR-UMFAKTOR sy-vline 
WA_ERCHV_STR-NETTOBTR sy-vline 
WA_ERCHV_STR-TWAERS sy-vline 
WA_ERCHV_STR-ABLBELNR sy-vline 
WA_ERCHV_STR-BELZEILE sy-vline 
WA_ERCHV_STR-ERCHV_BW_REL sy-vline 
WA_ERCHV_STR-SUBINST sy-vline 
WA_ERCHV_STR-SUBABRDATS sy-vline 
WA_ERCHV_STR-SUBABRVORG sy-vline 
WA_ERCHV_STR-I_ZWSTAND sy-vline 
WA_ERCHV_STR-I_ZWSTNDAB sy-vline 
WA_ERCHV_STR-I_ZWSTVOR sy-vline 
WA_ERCHV_STR-I_ABRMENGE sy-vline 
WA_ERCHV_STR-I_ABRMENGEVOR sy-vline 
WA_ERCHV_STR-I_ZWSTDIFF sy-vline 
WA_ERCHV_STR-ALPHNUM sy-vline 
WA_ERCHV_STR-COLOGRP_INST sy-vline      INTO ld_text SEPARATED BY SPACE.

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