ABAP Select data from SAP table REG30_GERA into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP REG30_GERA 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 REG30_GERA. 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 REG30_GERA 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_REG30_GERA TYPE STANDARD TABLE OF REG30_GERA,
      WA_REG30_GERA TYPE REG30_GERA,
      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: <REG30_GERA> TYPE REG30_GERA.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_REG30_GERA.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM REG30_GERA
  INTO TABLE IT_REG30_GERA.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM REG30_GERA
*  INTO TABLE @DATA(IT_REG30_GERA2).
*--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_REG30_GERA INDEX 1 INTO DATA(WA_REG30_GERA2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_REG30_GERA ASSIGNING <REG30_GERA>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<REG30_GERA>-MATNR = 1.
<REG30_GERA>-MATNRALT = 1.
<REG30_GERA>-GERAETNEU = 1.
<REG30_GERA>-EQUNRNEU = 1.
<REG30_GERA>-AUSBAU = 1.

ENDLOOP.

LOOP AT IT_REG30_GERA INTO WA_REG30_GERA.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_REG30_GERA-ZWGRUPPE, sy-vline,
  WA_REG30_GERA-EAGRUPPE, sy-vline,
  WA_REG30_GERA-SPARTE, sy-vline,
  WA_REG30_GERA-SPARTENEU, sy-vline,
  WA_REG30_GERA-MOVE_TYPE, sy-vline,
  WA_REG30_GERA-PLANT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_REG30_GERA 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_REG30_GERA 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_REG30_GERA INTO WA_REG30_GERA.


*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 MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_REG30_GERA-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REG30_GERA-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNRALT
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_REG30_GERA-MATNRALT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REG30_GERA-MATNRALT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GERNR, internal->external for field GERAETNEU
CALL FUNCTION 'CONVERSION_EXIT_GERNR_OUTPUT'
  EXPORTING
    input =                      WA_REG30_GERA-GERAETNEU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REG30_GERA-GERAETNEU.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field EQUNRNEU
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REG30_GERA-EQUNRNEU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REG30_GERA-EQUNRNEU.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ZWGRUPPE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REG30_GERA-ZWGRUPPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REG30_GERA-ZWGRUPPE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field EAGRUPPE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REG30_GERA-EAGRUPPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REG30_GERA-EAGRUPPE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KOSTL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REG30_GERA-KOSTL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REG30_GERA-KOSTL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AUFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REG30_GERA-AUFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REG30_GERA-AUFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KOSTL_O
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REG30_GERA-KOSTL_O
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REG30_GERA-KOSTL_O.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AUFNR_O
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REG30_GERA-AUFNR_O
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REG30_GERA-AUFNR_O.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GERNR, internal->external for field TRENR
CALL FUNCTION 'CONVERSION_EXIT_GERNR_OUTPUT'
  EXPORTING
    input =                      WA_REG30_GERA-TRENR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REG30_GERA-TRENR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field TRENRE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REG30_GERA-TRENRE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REG30_GERA-TRENRE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GERNR, internal->external for field WANDNR
CALL FUNCTION 'CONVERSION_EXIT_GERNR_OUTPUT'
  EXPORTING
    input =                      WA_REG30_GERA-WANDNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REG30_GERA-WANDNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field WANDNRE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REG30_GERA-WANDNRE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REG30_GERA-WANDNRE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GERNR, internal->external for field DRUCKNR
CALL FUNCTION 'CONVERSION_EXIT_GERNR_OUTPUT'
  EXPORTING
    input =                      WA_REG30_GERA-DRUCKNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REG30_GERA-DRUCKNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field DRUCKNRE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REG30_GERA-DRUCKNRE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REG30_GERA-DRUCKNRE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KOMGRP
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REG30_GERA-KOMGRP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REG30_GERA-KOMGRP.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PREISKLAG
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REG30_GERA-PREISKLAG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REG30_GERA-PREISKLAG.
WRITE:/ 'New Value:', ld_input.

*Conversion exit RAT11, internal->external for field RATING
CALL FUNCTION 'CONVERSION_EXIT_RAT11_OUTPUT'
  EXPORTING
    input =                      WA_REG30_GERA-RATING
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REG30_GERA-RATING.
WRITE:/ 'New Value:', ld_input.

*Conversion exit PVOLT, internal->external for field P_VOLTAGE
CALL FUNCTION 'CONVERSION_EXIT_PVOLT_OUTPUT'
  EXPORTING
    input =                      WA_REG30_GERA-P_VOLTAGE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REG30_GERA-P_VOLTAGE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit SVOLT, internal->external for field S_VOLTAGE
CALL FUNCTION 'CONVERSION_EXIT_SVOLT_OUTPUT'
  EXPORTING
    input =                      WA_REG30_GERA-S_VOLTAGE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REG30_GERA-S_VOLTAGE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GERNR, internal->external for field VOLTTRANSFNR
CALL FUNCTION 'CONVERSION_EXIT_GERNR_OUTPUT'
  EXPORTING
    input =                      WA_REG30_GERA-VOLTTRANSFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REG30_GERA-VOLTTRANSFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VOLTTRANSFNRE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REG30_GERA-VOLTTRANSFNRE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REG30_GERA-VOLTTRANSFNRE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GERNR, internal->external for field GERAETALT
CALL FUNCTION 'CONVERSION_EXIT_GERNR_OUTPUT'
  EXPORTING
    input =                      WA_REG30_GERA-GERAETALT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REG30_GERA-GERAETALT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field EQUNRALT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REG30_GERA-EQUNRALT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REG30_GERA-EQUNRALT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TPLNR, internal->external for field DEVLOC
CALL FUNCTION 'CONVERSION_EXIT_TPLNR_OUTPUT'
  EXPORTING
    input =                      WA_REG30_GERA-DEVLOC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REG30_GERA-DEVLOC.
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_REG30_GERA_STR, 
MATNR TYPE STRING,
MATNRALT TYPE STRING,
GERAETNEU TYPE STRING,
EQUNRNEU TYPE STRING,
AUSBAU TYPE STRING,
ZWGRUPPE TYPE STRING,
EAGRUPPE TYPE STRING,
SPARTE TYPE STRING,
SPARTENEU TYPE STRING,
MOVE_TYPE TYPE STRING,
PLANT TYPE STRING,
STGE_LOC TYPE STRING,
KOSTL TYPE STRING,
WEMPF TYPE STRING,
BKTXT TYPE STRING,
SOBKZ TYPE STRING,
GRUND TYPE STRING,
AUFNR TYPE STRING,
MOVE_TYPE_O TYPE STRING,
PLANT_O TYPE STRING,
STGE_LOC_O TYPE STRING,
KOSTL_O TYPE STRING,
WEMPF_O TYPE STRING,
BKTXT_O TYPE STRING,
SOBKZ_O TYPE STRING,
GRUND_O TYPE STRING,
AUFNR_O TYPE STRING,
GERWECHS TYPE STRING,
VERBGL TYPE STRING,
VERLOS TYPE STRING,
TRENR TYPE STRING,
TRENRE TYPE STRING,
PROGT TYPE STRING,
WANDNR TYPE STRING,
WANDNRE TYPE STRING,
ABRFAKT TYPE STRING,
DRUCKNR TYPE STRING,
DRUCKNRE TYPE STRING,
MESSDRCK TYPE STRING,
MESSDRCKG TYPE STRING,
KOMGRP TYPE STRING,
UEBERVER TYPE STRING,
GVERRECHG TYPE STRING,
TARIFARTG TYPE STRING,
KONDIGRG TYPE STRING,
PREISKLAG TYPE STRING,
PRIMWNR1 TYPE STRING,
SEKWNR1 TYPE STRING,
PRIMWNR2 TYPE STRING,
SEKWNR2 TYPE STRING,
USE_PRE_REGREL TYPE STRING,
NOTSAMPDEV TYPE STRING,
DEVICE_NBR TYPE STRING,
LOSSDTGROUP TYPE STRING,
RATING TYPE STRING,
P_VOLTAGE TYPE STRING,
S_VOLTAGE TYPE STRING,
AMS TYPE STRING,
AMCG_CAP_GRP TYPE STRING,
VOLTTRANSFNR TYPE STRING,
VOLTTRANSFNRE TYPE STRING,
MSG_ATTR_ID TYPE STRING,
CAP_ACT_GRP TYPE STRING,
GERAETALT TYPE STRING,
EQUNRALT TYPE STRING,
ACTION TYPE STRING,
DEVLOC TYPE STRING,
CREATE_NEW_DEV TYPE STRING,
MULTI_INST_AL TYPE STRING,
NO_MR_REQUIRED TYPE STRING,END OF T_EKKO_STR.
DATA: WA_REG30_GERA_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_REG30_GERA_STR-MATNR sy-vline 
WA_REG30_GERA_STR-MATNRALT sy-vline 
WA_REG30_GERA_STR-GERAETNEU sy-vline 
WA_REG30_GERA_STR-EQUNRNEU sy-vline 
WA_REG30_GERA_STR-AUSBAU sy-vline 
WA_REG30_GERA_STR-ZWGRUPPE sy-vline 
WA_REG30_GERA_STR-EAGRUPPE sy-vline 
WA_REG30_GERA_STR-SPARTE sy-vline 
WA_REG30_GERA_STR-SPARTENEU sy-vline 
WA_REG30_GERA_STR-MOVE_TYPE sy-vline 
WA_REG30_GERA_STR-PLANT sy-vline 
WA_REG30_GERA_STR-STGE_LOC sy-vline 
WA_REG30_GERA_STR-KOSTL sy-vline 
WA_REG30_GERA_STR-WEMPF sy-vline 
WA_REG30_GERA_STR-BKTXT sy-vline 
WA_REG30_GERA_STR-SOBKZ sy-vline 
WA_REG30_GERA_STR-GRUND sy-vline 
WA_REG30_GERA_STR-AUFNR sy-vline 
WA_REG30_GERA_STR-MOVE_TYPE_O sy-vline 
WA_REG30_GERA_STR-PLANT_O sy-vline 
WA_REG30_GERA_STR-STGE_LOC_O sy-vline 
WA_REG30_GERA_STR-KOSTL_O sy-vline 
WA_REG30_GERA_STR-WEMPF_O sy-vline 
WA_REG30_GERA_STR-BKTXT_O sy-vline 
WA_REG30_GERA_STR-SOBKZ_O sy-vline 
WA_REG30_GERA_STR-GRUND_O sy-vline 
WA_REG30_GERA_STR-AUFNR_O sy-vline 
WA_REG30_GERA_STR-GERWECHS sy-vline 
WA_REG30_GERA_STR-VERBGL sy-vline 
WA_REG30_GERA_STR-VERLOS sy-vline 
WA_REG30_GERA_STR-TRENR sy-vline 
WA_REG30_GERA_STR-TRENRE sy-vline 
WA_REG30_GERA_STR-PROGT sy-vline 
WA_REG30_GERA_STR-WANDNR sy-vline 
WA_REG30_GERA_STR-WANDNRE sy-vline 
WA_REG30_GERA_STR-ABRFAKT sy-vline 
WA_REG30_GERA_STR-DRUCKNR sy-vline 
WA_REG30_GERA_STR-DRUCKNRE sy-vline 
WA_REG30_GERA_STR-MESSDRCK sy-vline 
WA_REG30_GERA_STR-MESSDRCKG sy-vline 
WA_REG30_GERA_STR-KOMGRP sy-vline 
WA_REG30_GERA_STR-UEBERVER sy-vline 
WA_REG30_GERA_STR-GVERRECHG sy-vline 
WA_REG30_GERA_STR-TARIFARTG sy-vline 
WA_REG30_GERA_STR-KONDIGRG sy-vline 
WA_REG30_GERA_STR-PREISKLAG sy-vline 
WA_REG30_GERA_STR-PRIMWNR1 sy-vline 
WA_REG30_GERA_STR-SEKWNR1 sy-vline 
WA_REG30_GERA_STR-PRIMWNR2 sy-vline 
WA_REG30_GERA_STR-SEKWNR2 sy-vline 
WA_REG30_GERA_STR-USE_PRE_REGREL sy-vline 
WA_REG30_GERA_STR-NOTSAMPDEV sy-vline 
WA_REG30_GERA_STR-DEVICE_NBR sy-vline 
WA_REG30_GERA_STR-LOSSDTGROUP sy-vline 
WA_REG30_GERA_STR-RATING sy-vline 
WA_REG30_GERA_STR-P_VOLTAGE sy-vline 
WA_REG30_GERA_STR-S_VOLTAGE sy-vline 
WA_REG30_GERA_STR-AMS sy-vline 
WA_REG30_GERA_STR-AMCG_CAP_GRP sy-vline 
WA_REG30_GERA_STR-VOLTTRANSFNR sy-vline 
WA_REG30_GERA_STR-VOLTTRANSFNRE sy-vline 
WA_REG30_GERA_STR-MSG_ATTR_ID sy-vline 
WA_REG30_GERA_STR-CAP_ACT_GRP sy-vline 
WA_REG30_GERA_STR-GERAETALT sy-vline 
WA_REG30_GERA_STR-EQUNRALT sy-vline 
WA_REG30_GERA_STR-ACTION sy-vline 
WA_REG30_GERA_STR-DEVLOC sy-vline 
WA_REG30_GERA_STR-CREATE_NEW_DEV sy-vline 
WA_REG30_GERA_STR-MULTI_INST_AL sy-vline 
WA_REG30_GERA_STR-NO_MR_REQUIRED sy-vline      INTO ld_text SEPARATED BY SPACE.

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