ABAP Select data from SAP table EWALOCD_TCHN into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EWALOCD_TCHN
*  INTO TABLE @DATA(IT_EWALOCD_TCHN2).
*--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_EWALOCD_TCHN INDEX 1 INTO DATA(WA_EWALOCD_TCHN2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<EWALOCD_TCHN>-EADAT = 1.
<EWALOCD_TCHN>-BEHALT = 1.
<EWALOCD_TCHN>-EQUNRNEU = 1.
<EWALOCD_TCHN>-EQUNRALT = 1.
<EWALOCD_TCHN>-TABMAX = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EWALOCD_TCHN-TABACT, sy-vline,
  WA_EWALOCD_TCHN-MATNRNEU, sy-vline,
  WA_EWALOCD_TCHN-MATNRALT, sy-vline,
  WA_EWALOCD_TCHN-BEHNEU, sy-vline,
  WA_EWALOCD_TCHN-AUSBAU, sy-vline,
  WA_EWALOCD_TCHN-SPARTE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_EWALOCD_TCHN 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_EWALOCD_TCHN 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_EWALOCD_TCHN INTO WA_EWALOCD_TCHN.


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

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

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

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

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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field VBELN_DL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EWALOCD_TCHN-VBELN_DL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EWALOCD_TCHN-VBELN_DL.
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_EWALOCD_TCHN_STR, 
EADAT TYPE STRING,
BEHALT TYPE STRING,
EQUNRNEU TYPE STRING,
EQUNRALT TYPE STRING,
TABMAX TYPE STRING,
TABACT TYPE STRING,
MATNRNEU TYPE STRING,
MATNRALT TYPE STRING,
BEHNEU TYPE STRING,
AUSBAU TYPE STRING,
SPARTE TYPE STRING,
BEHWECHS TYPE STRING,
LINE_MARK TYPE STRING,
EXIT_TYPE TYPE STRING,
TEMP_ZUORDNUNG TYPE STRING,
CONT_COUNT TYPE STRING,
DEVGRP TYPE STRING,
LOGIK TYPE STRING,
OLD_CONT_COUNT TYPE STRING,
SERVICE_TYPE TYPE STRING,
PLANNED_TIME TYPE STRING,
CONT_TC_TO TYPE STRING,
CONT_TC_TIMTO TYPE STRING,
IBASE_C TYPE STRING,
SERVICE_REMOVAL TYPE STRING,
WDO_SIGN TYPE STRING,
SF_SIGN TYPE STRING,
TIMEFRAME TYPE STRING,
START_TIME TYPE STRING,
END_TIME TYPE STRING,
ROUTE TYPE STRING,
WDOTXT TYPE STRING,
REMROUTE TYPE STRING,
IBASE_HANDLE TYPE STRING,
VBELN_DL TYPE STRING,
POSNR_DL TYPE STRING,
CONTSHARE_DL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EWALOCD_TCHN_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_EWALOCD_TCHN_STR-EADAT sy-vline 
WA_EWALOCD_TCHN_STR-BEHALT sy-vline 
WA_EWALOCD_TCHN_STR-EQUNRNEU sy-vline 
WA_EWALOCD_TCHN_STR-EQUNRALT sy-vline 
WA_EWALOCD_TCHN_STR-TABMAX sy-vline 
WA_EWALOCD_TCHN_STR-TABACT sy-vline 
WA_EWALOCD_TCHN_STR-MATNRNEU sy-vline 
WA_EWALOCD_TCHN_STR-MATNRALT sy-vline 
WA_EWALOCD_TCHN_STR-BEHNEU sy-vline 
WA_EWALOCD_TCHN_STR-AUSBAU sy-vline 
WA_EWALOCD_TCHN_STR-SPARTE sy-vline 
WA_EWALOCD_TCHN_STR-BEHWECHS sy-vline 
WA_EWALOCD_TCHN_STR-LINE_MARK sy-vline 
WA_EWALOCD_TCHN_STR-EXIT_TYPE sy-vline 
WA_EWALOCD_TCHN_STR-TEMP_ZUORDNUNG sy-vline 
WA_EWALOCD_TCHN_STR-CONT_COUNT sy-vline 
WA_EWALOCD_TCHN_STR-DEVGRP sy-vline 
WA_EWALOCD_TCHN_STR-LOGIK sy-vline 
WA_EWALOCD_TCHN_STR-OLD_CONT_COUNT sy-vline 
WA_EWALOCD_TCHN_STR-SERVICE_TYPE sy-vline 
WA_EWALOCD_TCHN_STR-PLANNED_TIME sy-vline 
WA_EWALOCD_TCHN_STR-CONT_TC_TO sy-vline 
WA_EWALOCD_TCHN_STR-CONT_TC_TIMTO sy-vline 
WA_EWALOCD_TCHN_STR-IBASE_C sy-vline 
WA_EWALOCD_TCHN_STR-SERVICE_REMOVAL sy-vline 
WA_EWALOCD_TCHN_STR-WDO_SIGN sy-vline 
WA_EWALOCD_TCHN_STR-SF_SIGN sy-vline 
WA_EWALOCD_TCHN_STR-TIMEFRAME sy-vline 
WA_EWALOCD_TCHN_STR-START_TIME sy-vline 
WA_EWALOCD_TCHN_STR-END_TIME sy-vline 
WA_EWALOCD_TCHN_STR-ROUTE sy-vline 
WA_EWALOCD_TCHN_STR-WDOTXT sy-vline 
WA_EWALOCD_TCHN_STR-REMROUTE sy-vline 
WA_EWALOCD_TCHN_STR-IBASE_HANDLE sy-vline 
WA_EWALOCD_TCHN_STR-VBELN_DL sy-vline 
WA_EWALOCD_TCHN_STR-POSNR_DL sy-vline 
WA_EWALOCD_TCHN_STR-CONTSHARE_DL sy-vline      INTO ld_text SEPARATED BY SPACE.

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