ABAP Select data from SAP table LGRWR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LGRWR
*  INTO TABLE @DATA(IT_LGRWR2).
*--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_LGRWR INDEX 1 INTO DATA(WA_LGRWR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LGRWR>-R_VTYPE_S = 1.
<LGRWR>-R_VTYPE_F = 1.
<LGRWR>-R_VTYPE_T = 1.
<LGRWR>-R_VTYPE_R = 1.
<LGRWR>-R_TTYPE_F = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LGRWR-R_TTYPE_V, sy-vline,
  WA_LGRWR-R_TTYPE_S, sy-vline,
  WA_LGRWR-R_TTYPE_L, sy-vline,
  WA_LGRWR-COLOR, sy-vline,
  WA_LGRWR-INTENSIVE, sy-vline,
  WA_LGRWR-INVERSE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LGRWR 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_LGRWR 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_LGRWR INTO WA_LGRWR.


*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 ISOLA, internal->external for field LANGU
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_LGRWR-LANGU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LGRWR-LANGU.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field REF_LANGU
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_LGRWR-REF_LANGU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LGRWR-REF_LANGU.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field MLANGU
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_LGRWR-MLANGU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LGRWR-MLANGU.
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_LGRWR_STR, 
R_VTYPE_S TYPE STRING,
R_VTYPE_F TYPE STRING,
R_VTYPE_T TYPE STRING,
R_VTYPE_R TYPE STRING,
R_TTYPE_F TYPE STRING,
R_TTYPE_V TYPE STRING,
R_TTYPE_S TYPE STRING,
R_TTYPE_L TYPE STRING,
COLOR TYPE STRING,
INTENSIVE TYPE STRING,
INVERSE TYPE STRING,
SYM_WIDTH TYPE STRING,
SYM_HEIGHT TYPE STRING,
SYM_OFFSET TYPE STRING,
PAGE_WIDTH TYPE STRING,
LEFT_MARG TYPE STRING,
RIGHT_MARG TYPE STRING,
VTYPE_TEXT TYPE STRING,
TTYPE_TEXT TYPE STRING,
SYM_TEXT TYPE STRING,
LANGU TYPE STRING,
REF_LANGU TYPE STRING,
REF_TTYPE TYPE STRING,
MLANGU TYPE STRING,
R_TXTYPE_H TYPE STRING,
R_TXTYPE_F TYPE STRING,
R_TXTYPE_T TYPE STRING,
R_TXTYPE_E TYPE STRING,
R_TXTYPE_X TYPE STRING,
VTYPE TYPE STRING,
TTYPE TYPE STRING,
SYM_NAME TYPE STRING,
TABNAME TYPE STRING,
FIELDNAME TYPE STRING,
SYM_TYPE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LGRWR_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_LGRWR_STR-R_VTYPE_S sy-vline 
WA_LGRWR_STR-R_VTYPE_F sy-vline 
WA_LGRWR_STR-R_VTYPE_T sy-vline 
WA_LGRWR_STR-R_VTYPE_R sy-vline 
WA_LGRWR_STR-R_TTYPE_F sy-vline 
WA_LGRWR_STR-R_TTYPE_V sy-vline 
WA_LGRWR_STR-R_TTYPE_S sy-vline 
WA_LGRWR_STR-R_TTYPE_L sy-vline 
WA_LGRWR_STR-COLOR sy-vline 
WA_LGRWR_STR-INTENSIVE sy-vline 
WA_LGRWR_STR-INVERSE sy-vline 
WA_LGRWR_STR-SYM_WIDTH sy-vline 
WA_LGRWR_STR-SYM_HEIGHT sy-vline 
WA_LGRWR_STR-SYM_OFFSET sy-vline 
WA_LGRWR_STR-PAGE_WIDTH sy-vline 
WA_LGRWR_STR-LEFT_MARG sy-vline 
WA_LGRWR_STR-RIGHT_MARG sy-vline 
WA_LGRWR_STR-VTYPE_TEXT sy-vline 
WA_LGRWR_STR-TTYPE_TEXT sy-vline 
WA_LGRWR_STR-SYM_TEXT sy-vline 
WA_LGRWR_STR-LANGU sy-vline 
WA_LGRWR_STR-REF_LANGU sy-vline 
WA_LGRWR_STR-REF_TTYPE sy-vline 
WA_LGRWR_STR-MLANGU sy-vline 
WA_LGRWR_STR-R_TXTYPE_H sy-vline 
WA_LGRWR_STR-R_TXTYPE_F sy-vline 
WA_LGRWR_STR-R_TXTYPE_T sy-vline 
WA_LGRWR_STR-R_TXTYPE_E sy-vline 
WA_LGRWR_STR-R_TXTYPE_X sy-vline 
WA_LGRWR_STR-VTYPE sy-vline 
WA_LGRWR_STR-TTYPE sy-vline 
WA_LGRWR_STR-SYM_NAME sy-vline 
WA_LGRWR_STR-TABNAME sy-vline 
WA_LGRWR_STR-FIELDNAME sy-vline 
WA_LGRWR_STR-SYM_TYPE sy-vline      INTO ld_text SEPARATED BY SPACE.

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