ABAP Select data from SAP table LTB1 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP LTB1 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 LTB1. 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 LTB1 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_LTB1 TYPE STANDARD TABLE OF LTB1,
      WA_LTB1 TYPE LTB1,
      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: <LTB1> TYPE LTB1.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_LTB1.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM LTB1
  INTO TABLE IT_LTB1.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LTB1
*  INTO TABLE @DATA(IT_LTB12).
*--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_LTB1 INDEX 1 INTO DATA(WA_LTB12).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_LTB1 ASSIGNING <LTB1>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LTB1>-SATZNUMMER = 1.
<LTB1>-LGNUM = 1.
<LTB1>-TRART = 1.
<LTB1>-TBPRI = 1.
<LTB1>-MATNR = 1.

ENDLOOP.

LOOP AT IT_LTB1 INTO WA_LTB1.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LTB1-WERKS, sy-vline,
  WA_LTB1-LGORT, sy-vline,
  WA_LTB1-CHARG, sy-vline,
  WA_LTB1-BESTQ, sy-vline,
  WA_LTB1-SOBKZ, sy-vline,
  WA_LTB1-SONUM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LTB1 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_LTB1 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_LTB1 INTO WA_LTB1.


*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_LTB1-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LTB1-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SONUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_LTB1-SONUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LTB1-SONUM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field ALTME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_LTB1-ALTME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LTB1-ALTME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field BENUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_LTB1-BENUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LTB1-BENUM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field QPLOS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_LTB1-QPLOS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LTB1-QPLOS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_LTB1-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LTB1-MEINS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field GEWEI
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_LTB1-GEWEI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LTB1-GEWEI.
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_LTB1_STR, 
SATZNUMMER TYPE STRING,
LGNUM TYPE STRING,
TRART TYPE STRING,
TBPRI TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
LGORT TYPE STRING,
CHARG TYPE STRING,
BESTQ TYPE STRING,
SOBKZ TYPE STRING,
SONUM TYPE STRING,
MENGA TYPE STRING,
ALTME TYPE STRING,
TBKTX TYPE STRING,
WEMPF TYPE STRING,
ABLAD TYPE STRING,
BNAME TYPE STRING,
BETYP TYPE STRING,
BENUM TYPE STRING,
BWLVS TYPE STRING,
VLTYP TYPE STRING,
VLPLA TYPE STRING,
NLTYP TYPE STRING,
NLPLA TYPE STRING,
PDATU TYPE STRING,
PZEIT TYPE STRING,
QPLOS TYPE STRING,
VSCHN TYPE STRING,
NSCHN TYPE STRING,
VKDYN TYPE STRING,
NKDYN TYPE STRING,
TBNUM TYPE STRING,
TBPOS TYPE STRING,
ECODE TYPE STRING,
EPROT TYPE STRING,
TBFKZ TYPE STRING,
MENGE TYPE STRING,
MEINS TYPE STRING,
UMREZ TYPE STRING,
UMREN TYPE STRING,
BRGEW TYPE STRING,
GEWEI TYPE STRING,
EINPO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LTB1_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_LTB1_STR-SATZNUMMER sy-vline 
WA_LTB1_STR-LGNUM sy-vline 
WA_LTB1_STR-TRART sy-vline 
WA_LTB1_STR-TBPRI sy-vline 
WA_LTB1_STR-MATNR sy-vline 
WA_LTB1_STR-WERKS sy-vline 
WA_LTB1_STR-LGORT sy-vline 
WA_LTB1_STR-CHARG sy-vline 
WA_LTB1_STR-BESTQ sy-vline 
WA_LTB1_STR-SOBKZ sy-vline 
WA_LTB1_STR-SONUM sy-vline 
WA_LTB1_STR-MENGA sy-vline 
WA_LTB1_STR-ALTME sy-vline 
WA_LTB1_STR-TBKTX sy-vline 
WA_LTB1_STR-WEMPF sy-vline 
WA_LTB1_STR-ABLAD sy-vline 
WA_LTB1_STR-BNAME sy-vline 
WA_LTB1_STR-BETYP sy-vline 
WA_LTB1_STR-BENUM sy-vline 
WA_LTB1_STR-BWLVS sy-vline 
WA_LTB1_STR-VLTYP sy-vline 
WA_LTB1_STR-VLPLA sy-vline 
WA_LTB1_STR-NLTYP sy-vline 
WA_LTB1_STR-NLPLA sy-vline 
WA_LTB1_STR-PDATU sy-vline 
WA_LTB1_STR-PZEIT sy-vline 
WA_LTB1_STR-QPLOS sy-vline 
WA_LTB1_STR-VSCHN sy-vline 
WA_LTB1_STR-NSCHN sy-vline 
WA_LTB1_STR-VKDYN sy-vline 
WA_LTB1_STR-NKDYN sy-vline 
WA_LTB1_STR-TBNUM sy-vline 
WA_LTB1_STR-TBPOS sy-vline 
WA_LTB1_STR-ECODE sy-vline 
WA_LTB1_STR-EPROT sy-vline 
WA_LTB1_STR-TBFKZ sy-vline 
WA_LTB1_STR-MENGE sy-vline 
WA_LTB1_STR-MEINS sy-vline 
WA_LTB1_STR-UMREZ sy-vline 
WA_LTB1_STR-UMREN sy-vline 
WA_LTB1_STR-BRGEW sy-vline 
WA_LTB1_STR-GEWEI sy-vline 
WA_LTB1_STR-EINPO sy-vline      INTO ld_text SEPARATED BY SPACE.

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