ABAP Select data from SAP table /PMG/GE_FILE_MAPPING_S into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /PMG/GE_FILE_MAPPING_S
*  INTO TABLE @DATA(IT_/PMG/GE_FILE_MAPPING_S2).
*--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_/PMG/GE_FILE_MAPPING_S INDEX 1 INTO DATA(WA_/PMG/GE_FILE_MAPPING_S2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
</PMG/GE_FILE_MAPPING_S>-BTX_ID = 1.
</PMG/GE_FILE_MAPPING_S>-POLICYNR_TT = 1.
</PMG/GE_FILE_MAPPING_S>-APPLNR_TT = 1.
</PMG/GE_FILE_MAPPING_S>-COVERAGENR_TT = 1.
</PMG/GE_FILE_MAPPING_S>-TARGET_DATE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/PMG/GE_FILE_MAPPING_S-POLPRODEND_DT, sy-vline,
  WA_/PMG/GE_FILE_MAPPING_S-POLPR_PREMENDB_DT, sy-vline,
  WA_/PMG/GE_FILE_MAPPING_S-POLPRPM_ID, sy-vline,
  WA_/PMG/GE_FILE_MAPPING_S-POLPR_PRMPM_ID, sy-vline,
  WA_/PMG/GE_FILE_MAPPING_S-PRMPAYRPM_ID, sy-vline,
  WA_/PMG/GE_FILE_MAPPING_S-PRMPARTNER_ID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/PMG/GE_FILE_MAPPING_S 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_/PMG/GE_FILE_MAPPING_S 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_/PMG/GE_FILE_MAPPING_S INTO WA_/PMG/GE_FILE_MAPPING_S.


*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 POLICYNR_TT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/PMG/GE_FILE_MAPPING_S-POLICYNR_TT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/PMG/GE_FILE_MAPPING_S-POLICYNR_TT.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit J7PHD, internal->external for field POLPR_PREMENDB_DT
CALL FUNCTION 'CONVERSION_EXIT_J7PHD_OUTPUT'
  EXPORTING
    input =                      WA_/PMG/GE_FILE_MAPPING_S-POLPR_PREMENDB_DT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/PMG/GE_FILE_MAPPING_S-POLPR_PREMENDB_DT.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit J7PHD, internal->external for field COVEND_DT
CALL FUNCTION 'CONVERSION_EXIT_J7PHD_OUTPUT'
  EXPORTING
    input =                      WA_/PMG/GE_FILE_MAPPING_S-COVEND_DT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/PMG/GE_FILE_MAPPING_S-COVEND_DT.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit J7PHD, internal->external for field COV_PREMENDB_DT
CALL FUNCTION 'CONVERSION_EXIT_J7PHD_OUTPUT'
  EXPORTING
    input =                      WA_/PMG/GE_FILE_MAPPING_S-COV_PREMENDB_DT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/PMG/GE_FILE_MAPPING_S-COV_PREMENDB_DT.
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_/PMG/GE_FILE_MAPPING_S_STR, 
BTX_ID TYPE STRING,
POLICYNR_TT TYPE STRING,
APPLNR_TT TYPE STRING,
COVERAGENR_TT TYPE STRING,
TARGET_DATE TYPE STRING,
POLPRODEND_DT TYPE STRING,
POLPR_PREMENDB_DT TYPE STRING,
POLPRPM_ID TYPE STRING,
POLPR_PRMPM_ID TYPE STRING,
PRMPAYRPM_ID TYPE STRING,
PRMPARTNER_ID TYPE STRING,
COVPM_ID TYPE STRING,
COVEND_DT TYPE STRING,
ENDOWMATURITY_AM TYPE STRING,
INSURED_BP TYPE STRING,
INSURED_PM_ID TYPE STRING,
COV_PRMPM_ID TYPE STRING,
COV_PREMENDB_DT TYPE STRING,
BNF_PM_ID TYPE STRING,
USEPREM_CD TYPE STRING,
CLCRL_ID TYPE STRING,
DTHINSURED_AM TYPE STRING,
CLAUSE_PM_ID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/PMG/GE_FILE_MAPPING_S_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_/PMG/GE_FILE_MAPPING_S_STR-BTX_ID sy-vline 
WA_/PMG/GE_FILE_MAPPING_S_STR-POLICYNR_TT sy-vline 
WA_/PMG/GE_FILE_MAPPING_S_STR-APPLNR_TT sy-vline 
WA_/PMG/GE_FILE_MAPPING_S_STR-COVERAGENR_TT sy-vline 
WA_/PMG/GE_FILE_MAPPING_S_STR-TARGET_DATE sy-vline 
WA_/PMG/GE_FILE_MAPPING_S_STR-POLPRODEND_DT sy-vline 
WA_/PMG/GE_FILE_MAPPING_S_STR-POLPR_PREMENDB_DT sy-vline 
WA_/PMG/GE_FILE_MAPPING_S_STR-POLPRPM_ID sy-vline 
WA_/PMG/GE_FILE_MAPPING_S_STR-POLPR_PRMPM_ID sy-vline 
WA_/PMG/GE_FILE_MAPPING_S_STR-PRMPAYRPM_ID sy-vline 
WA_/PMG/GE_FILE_MAPPING_S_STR-PRMPARTNER_ID sy-vline 
WA_/PMG/GE_FILE_MAPPING_S_STR-COVPM_ID sy-vline 
WA_/PMG/GE_FILE_MAPPING_S_STR-COVEND_DT sy-vline 
WA_/PMG/GE_FILE_MAPPING_S_STR-ENDOWMATURITY_AM sy-vline 
WA_/PMG/GE_FILE_MAPPING_S_STR-INSURED_BP sy-vline 
WA_/PMG/GE_FILE_MAPPING_S_STR-INSURED_PM_ID sy-vline 
WA_/PMG/GE_FILE_MAPPING_S_STR-COV_PRMPM_ID sy-vline 
WA_/PMG/GE_FILE_MAPPING_S_STR-COV_PREMENDB_DT sy-vline 
WA_/PMG/GE_FILE_MAPPING_S_STR-BNF_PM_ID sy-vline 
WA_/PMG/GE_FILE_MAPPING_S_STR-USEPREM_CD sy-vline 
WA_/PMG/GE_FILE_MAPPING_S_STR-CLCRL_ID sy-vline 
WA_/PMG/GE_FILE_MAPPING_S_STR-DTHINSURED_AM sy-vline 
WA_/PMG/GE_FILE_MAPPING_S_STR-CLAUSE_PM_ID sy-vline      INTO ld_text SEPARATED BY SPACE.

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