ABAP Select data from SAP table PSGENLOG2 into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PSGENLOG2 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 PSGENLOG2. 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 PSGENLOG2 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_PSGENLOG2 TYPE STANDARD TABLE OF PSGENLOG2,
      WA_PSGENLOG2 TYPE PSGENLOG2,
      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: <PSGENLOG2> TYPE PSGENLOG2.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PSGENLOG2.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PSGENLOG2
  INTO TABLE IT_PSGENLOG2.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PSGENLOG2
*  INTO TABLE @DATA(IT_PSGENLOG22).
*--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_PSGENLOG2 INDEX 1 INTO DATA(WA_PSGENLOG22).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PSGENLOG2 ASSIGNING <PSGENLOG2>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PSGENLOG2>-OBJNR = 1.
<PSGENLOG2>-YEARB = 1.
<PSGENLOG2>-PERDE = 1.
<PSGENLOG2>-PERIO = 1.
<PSGENLOG2>-EXPDATE = 1.

ENDLOOP.

LOOP AT IT_PSGENLOG2 INTO WA_PSGENLOG2.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PSGENLOG2-PRJDEF, sy-vline,
  WA_PSGENLOG2-WBSITN, sy-vline,
  WA_PSGENLOG2-ECKST, sy-vline,
  WA_PSGENLOG2-ECKEN, sy-vline,
  WA_PSGENLOG2-PROGST, sy-vline,
  WA_PSGENLOG2-PROGEN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PSGENLOG2 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_PSGENLOG2 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_PSGENLOG2 INTO WA_PSGENLOG2.


*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 OBJEX, internal->external for field OBJNR
CALL FUNCTION 'CONVERSION_EXIT_OBJEX_OUTPUT'
  EXPORTING
    input =                      WA_PSGENLOG2-OBJNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PSGENLOG2-OBJNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field YEARB
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_PSGENLOG2-YEARB
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PSGENLOG2-YEARB.
WRITE:/ 'New Value:', ld_input.

*Conversion exit PERI7, internal->external for field PERIO
CALL FUNCTION 'CONVERSION_EXIT_PERI7_OUTPUT'
  EXPORTING
    input =                      WA_PSGENLOG2-PERIO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PSGENLOG2-PERIO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit KONPD, internal->external for field PRJDEF
CALL FUNCTION 'CONVERSION_EXIT_KONPD_OUTPUT'
  EXPORTING
    input =                      WA_PSGENLOG2-PRJDEF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PSGENLOG2-PRJDEF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSP, internal->external for field WBSITN
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_PSGENLOG2-WBSITN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PSGENLOG2-WBSITN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field EARBEH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_PSGENLOG2-EARBEH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PSGENLOG2-EARBEH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field PARBEH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_PSGENLOG2-PARBEH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PSGENLOG2-PARBEH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field VARBEH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_PSGENLOG2-VARBEH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PSGENLOG2-VARBEH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field IARBEH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_PSGENLOG2-IARBEH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PSGENLOG2-IARBEH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field RARBEH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_PSGENLOG2-RARBEH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PSGENLOG2-RARBEH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field EDAUEH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_PSGENLOG2-EDAUEH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PSGENLOG2-EDAUEH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field PDAUEH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_PSGENLOG2-PDAUEH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PSGENLOG2-PDAUEH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field VDAUEH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_PSGENLOG2-VDAUEH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PSGENLOG2-VDAUEH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field IDAUEH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_PSGENLOG2-IDAUEH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PSGENLOG2-IDAUEH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field RDAUEH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_PSGENLOG2-RDAUEH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PSGENLOG2-RDAUEH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field USE04
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_PSGENLOG2-USE04
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PSGENLOG2-USE04.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field USE05
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_PSGENLOG2-USE05
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PSGENLOG2-USE05.
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_PSGENLOG2_STR, 
OBJNR TYPE STRING,
YEARB TYPE STRING,
PERDE TYPE STRING,
PERIO TYPE STRING,
EXPDATE TYPE STRING,
PRJDEF TYPE STRING,
WBSITN TYPE STRING,
ECKST TYPE STRING,
ECKEN TYPE STRING,
PROGST TYPE STRING,
PROGEN TYPE STRING,
TESTFR TYPE STRING,
TEENFR TYPE STRING,
TESTSP TYPE STRING,
TEENSP TYPE STRING,
TPSTFR TYPE STRING,
TPENFR TYPE STRING,
TPSTSP TYPE STRING,
TPENSP TYPE STRING,
VORLST TYPE STRING,
VORLEN TYPE STRING,
ISTST TYPE STRING,
ISTEN TYPE STRING,
DATFS TYPE STRING,
DATSE TYPE STRING,
EARBEI TYPE STRING,
EARBEH TYPE STRING,
PARBEI TYPE STRING,
PARBEH TYPE STRING,
VARBEI TYPE STRING,
VARBEH TYPE STRING,
IARBEI TYPE STRING,
IARBEH TYPE STRING,
RARBEI TYPE STRING,
RARBEH TYPE STRING,
EDAUER TYPE STRING,
EDAUEH TYPE STRING,
PDAUER TYPE STRING,
PDAUEH TYPE STRING,
VDAUER TYPE STRING,
VDAUEH TYPE STRING,
IDAUER TYPE STRING,
IDAUEH TYPE STRING,
RDAUER TYPE STRING,
RDAUEH TYPE STRING,
PUFGS TYPE STRING,
PUFFR TYPE STRING,
PUFGP TYPE STRING,
PUFFP TYPE STRING,
USR04 TYPE STRING,
USE04 TYPE STRING,
USR05 TYPE STRING,
USE05 TYPE STRING,
USR06 TYPE STRING,
USE06 TYPE STRING,
USR07 TYPE STRING,
USE07 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PSGENLOG2_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_PSGENLOG2_STR-OBJNR sy-vline 
WA_PSGENLOG2_STR-YEARB sy-vline 
WA_PSGENLOG2_STR-PERDE sy-vline 
WA_PSGENLOG2_STR-PERIO sy-vline 
WA_PSGENLOG2_STR-EXPDATE sy-vline 
WA_PSGENLOG2_STR-PRJDEF sy-vline 
WA_PSGENLOG2_STR-WBSITN sy-vline 
WA_PSGENLOG2_STR-ECKST sy-vline 
WA_PSGENLOG2_STR-ECKEN sy-vline 
WA_PSGENLOG2_STR-PROGST sy-vline 
WA_PSGENLOG2_STR-PROGEN sy-vline 
WA_PSGENLOG2_STR-TESTFR sy-vline 
WA_PSGENLOG2_STR-TEENFR sy-vline 
WA_PSGENLOG2_STR-TESTSP sy-vline 
WA_PSGENLOG2_STR-TEENSP sy-vline 
WA_PSGENLOG2_STR-TPSTFR sy-vline 
WA_PSGENLOG2_STR-TPENFR sy-vline 
WA_PSGENLOG2_STR-TPSTSP sy-vline 
WA_PSGENLOG2_STR-TPENSP sy-vline 
WA_PSGENLOG2_STR-VORLST sy-vline 
WA_PSGENLOG2_STR-VORLEN sy-vline 
WA_PSGENLOG2_STR-ISTST sy-vline 
WA_PSGENLOG2_STR-ISTEN sy-vline 
WA_PSGENLOG2_STR-DATFS sy-vline 
WA_PSGENLOG2_STR-DATSE sy-vline 
WA_PSGENLOG2_STR-EARBEI sy-vline 
WA_PSGENLOG2_STR-EARBEH sy-vline 
WA_PSGENLOG2_STR-PARBEI sy-vline 
WA_PSGENLOG2_STR-PARBEH sy-vline 
WA_PSGENLOG2_STR-VARBEI sy-vline 
WA_PSGENLOG2_STR-VARBEH sy-vline 
WA_PSGENLOG2_STR-IARBEI sy-vline 
WA_PSGENLOG2_STR-IARBEH sy-vline 
WA_PSGENLOG2_STR-RARBEI sy-vline 
WA_PSGENLOG2_STR-RARBEH sy-vline 
WA_PSGENLOG2_STR-EDAUER sy-vline 
WA_PSGENLOG2_STR-EDAUEH sy-vline 
WA_PSGENLOG2_STR-PDAUER sy-vline 
WA_PSGENLOG2_STR-PDAUEH sy-vline 
WA_PSGENLOG2_STR-VDAUER sy-vline 
WA_PSGENLOG2_STR-VDAUEH sy-vline 
WA_PSGENLOG2_STR-IDAUER sy-vline 
WA_PSGENLOG2_STR-IDAUEH sy-vline 
WA_PSGENLOG2_STR-RDAUER sy-vline 
WA_PSGENLOG2_STR-RDAUEH sy-vline 
WA_PSGENLOG2_STR-PUFGS sy-vline 
WA_PSGENLOG2_STR-PUFFR sy-vline 
WA_PSGENLOG2_STR-PUFGP sy-vline 
WA_PSGENLOG2_STR-PUFFP sy-vline 
WA_PSGENLOG2_STR-USR04 sy-vline 
WA_PSGENLOG2_STR-USE04 sy-vline 
WA_PSGENLOG2_STR-USR05 sy-vline 
WA_PSGENLOG2_STR-USE05 sy-vline 
WA_PSGENLOG2_STR-USR06 sy-vline 
WA_PSGENLOG2_STR-USE06 sy-vline 
WA_PSGENLOG2_STR-USR07 sy-vline 
WA_PSGENLOG2_STR-USE07 sy-vline      INTO ld_text SEPARATED BY SPACE.

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