ABAP Select data from SAP table /SAPPSPRO/ESSR_TREE_HIER into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /SAPPSPRO/ESSR_TREE_HIER 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 /SAPPSPRO/ESSR_TREE_HIER. 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 /SAPPSPRO/ESSR_TREE_HIER 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_/SAPPSPRO/ESSR_TREE_HIER TYPE STANDARD TABLE OF /SAPPSPRO/ESSR_TREE_HIER,
      WA_/SAPPSPRO/ESSR_TREE_HIER TYPE /SAPPSPRO/ESSR_TREE_HIER,
      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: </SAPPSPRO/ESSR_TREE_HIER> TYPE /SAPPSPRO/ESSR_TREE_HIER.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /SAPPSPRO/ESSR_TREE_HIER
  INTO TABLE IT_/SAPPSPRO/ESSR_TREE_HIER.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SAPPSPRO/ESSR_TREE_HIER
*  INTO TABLE @DATA(IT_/SAPPSPRO/ESSR_TREE_HIER2).
*--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_/SAPPSPRO/ESSR_TREE_HIER INDEX 1 INTO DATA(WA_/SAPPSPRO/ESSR_TREE_HIER2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/SAPPSPRO/ESSR_TREE_HIER ASSIGNING </SAPPSPRO/ESSR_TREE_HIER>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SAPPSPRO/ESSR_TREE_HIER>-LIFNR = 1.
</SAPPSPRO/ESSR_TREE_HIER>-NAME1 = 1.
</SAPPSPRO/ESSR_TREE_HIER>-EBELN = 1.
</SAPPSPRO/ESSR_TREE_HIER>-EBELP = 1.
</SAPPSPRO/ESSR_TREE_HIER>-LBLNI = 1.

ENDLOOP.

LOOP AT IT_/SAPPSPRO/ESSR_TREE_HIER INTO WA_/SAPPSPRO/ESSR_TREE_HIER.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SAPPSPRO/ESSR_TREE_HIER-LBLNE, sy-vline,
  WA_/SAPPSPRO/ESSR_TREE_HIER-SBNAMAG, sy-vline,
  WA_/SAPPSPRO/ESSR_TREE_HIER-SBNAMAN, sy-vline,
  WA_/SAPPSPRO/ESSR_TREE_HIER-DLORT, sy-vline,
  WA_/SAPPSPRO/ESSR_TREE_HIER-LBLDT, sy-vline,
  WA_/SAPPSPRO/ESSR_TREE_HIER-LZVON, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SAPPSPRO/ESSR_TREE_HIER 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_/SAPPSPRO/ESSR_TREE_HIER 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_/SAPPSPRO/ESSR_TREE_HIER INTO WA_/SAPPSPRO/ESSR_TREE_HIER.


*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 LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/SAPPSPRO/ESSR_TREE_HIER-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPPSPRO/ESSR_TREE_HIER-LIFNR.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field SPEC_NO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/SAPPSPRO/ESSR_TREE_HIER-SPEC_NO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPPSPRO/ESSR_TREE_HIER-SPEC_NO.
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_/SAPPSPRO/ESSR_TREE_HIER_STR, 
LIFNR TYPE STRING,
NAME1 TYPE STRING,
EBELN TYPE STRING,
EBELP TYPE STRING,
LBLNI TYPE STRING,
LBLNE TYPE STRING,
SBNAMAG TYPE STRING,
SBNAMAN TYPE STRING,
DLORT TYPE STRING,
LBLDT TYPE STRING,
LZVON TYPE STRING,
LZBIS TYPE STRING,
LWERT TYPE STRING,
UWERT TYPE STRING,
UNPLV TYPE STRING,
NETWR TYPE STRING,
WAERS TYPE STRING,
TXZ01 TYPE STRING,
LOEKZ TYPE STRING,
KZABN TYPE STRING,
PWWE TYPE STRING,
PWFR TYPE STRING,
BLDAT TYPE STRING,
BUDAT TYPE STRING,
XBLNR TYPE STRING,
BKTXT TYPE STRING,
KNTTP TYPE STRING,
BANFN TYPE STRING,
BNFPO TYPE STRING,
WARPL TYPE STRING,
WAPOS TYPE STRING,
ABNUM TYPE STRING,
FKNUM TYPE STRING,
FKPOS TYPE STRING,
SPEC_NO TYPE STRING,
LPN TYPE STRING,
EXLIN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SAPPSPRO/ESSR_TREE_HIER_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_/SAPPSPRO/ESSR_TREE_HIER_STR-LIFNR sy-vline 
WA_/SAPPSPRO/ESSR_TREE_HIER_STR-NAME1 sy-vline 
WA_/SAPPSPRO/ESSR_TREE_HIER_STR-EBELN sy-vline 
WA_/SAPPSPRO/ESSR_TREE_HIER_STR-EBELP sy-vline 
WA_/SAPPSPRO/ESSR_TREE_HIER_STR-LBLNI sy-vline 
WA_/SAPPSPRO/ESSR_TREE_HIER_STR-LBLNE sy-vline 
WA_/SAPPSPRO/ESSR_TREE_HIER_STR-SBNAMAG sy-vline 
WA_/SAPPSPRO/ESSR_TREE_HIER_STR-SBNAMAN sy-vline 
WA_/SAPPSPRO/ESSR_TREE_HIER_STR-DLORT sy-vline 
WA_/SAPPSPRO/ESSR_TREE_HIER_STR-LBLDT sy-vline 
WA_/SAPPSPRO/ESSR_TREE_HIER_STR-LZVON sy-vline 
WA_/SAPPSPRO/ESSR_TREE_HIER_STR-LZBIS sy-vline 
WA_/SAPPSPRO/ESSR_TREE_HIER_STR-LWERT sy-vline 
WA_/SAPPSPRO/ESSR_TREE_HIER_STR-UWERT sy-vline 
WA_/SAPPSPRO/ESSR_TREE_HIER_STR-UNPLV sy-vline 
WA_/SAPPSPRO/ESSR_TREE_HIER_STR-NETWR sy-vline 
WA_/SAPPSPRO/ESSR_TREE_HIER_STR-WAERS sy-vline 
WA_/SAPPSPRO/ESSR_TREE_HIER_STR-TXZ01 sy-vline 
WA_/SAPPSPRO/ESSR_TREE_HIER_STR-LOEKZ sy-vline 
WA_/SAPPSPRO/ESSR_TREE_HIER_STR-KZABN sy-vline 
WA_/SAPPSPRO/ESSR_TREE_HIER_STR-PWWE sy-vline 
WA_/SAPPSPRO/ESSR_TREE_HIER_STR-PWFR sy-vline 
WA_/SAPPSPRO/ESSR_TREE_HIER_STR-BLDAT sy-vline 
WA_/SAPPSPRO/ESSR_TREE_HIER_STR-BUDAT sy-vline 
WA_/SAPPSPRO/ESSR_TREE_HIER_STR-XBLNR sy-vline 
WA_/SAPPSPRO/ESSR_TREE_HIER_STR-BKTXT sy-vline 
WA_/SAPPSPRO/ESSR_TREE_HIER_STR-KNTTP sy-vline 
WA_/SAPPSPRO/ESSR_TREE_HIER_STR-BANFN sy-vline 
WA_/SAPPSPRO/ESSR_TREE_HIER_STR-BNFPO sy-vline 
WA_/SAPPSPRO/ESSR_TREE_HIER_STR-WARPL sy-vline 
WA_/SAPPSPRO/ESSR_TREE_HIER_STR-WAPOS sy-vline 
WA_/SAPPSPRO/ESSR_TREE_HIER_STR-ABNUM sy-vline 
WA_/SAPPSPRO/ESSR_TREE_HIER_STR-FKNUM sy-vline 
WA_/SAPPSPRO/ESSR_TREE_HIER_STR-FKPOS sy-vline 
WA_/SAPPSPRO/ESSR_TREE_HIER_STR-SPEC_NO sy-vline 
WA_/SAPPSPRO/ESSR_TREE_HIER_STR-LPN sy-vline 
WA_/SAPPSPRO/ESSR_TREE_HIER_STR-EXLIN sy-vline      INTO ld_text SEPARATED BY SPACE.

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