ABAP Select data from SAP table REQHEADS 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 REQHEADS 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 REQHEADS. 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 REQHEADS 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_REQHEADS TYPE STANDARD TABLE OF REQHEADS,
      WA_REQHEADS TYPE REQHEADS,
      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: <REQHEADS> TYPE REQHEADS.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM REQHEADS
*  INTO TABLE @DATA(IT_REQHEADS2).
*--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_REQHEADS INDEX 1 INTO DATA(WA_REQHEADS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<REQHEADS>-CLIENT = 1.
<REQHEADS>-REQNO = 1.
<REQHEADS>-REQLLINE = 1.
<REQHEADS>-PCKG_NO = 1.
<REQHEADS>-LIMIT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_REQHEADS-NO_LIMIT, sy-vline,
  WA_REQHEADS-EXP_VALUE, sy-vline,
  WA_REQHEADS-SSC_EXIST, sy-vline,
  WA_REQHEADS-CON_EXIST, sy-vline,
  WA_REQHEADS-TMP_EXIST, sy-vline,
  WA_REQHEADS-PRICE_CHG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_REQHEADS 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_REQHEADS 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_REQHEADS INTO WA_REQHEADS.


*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 REQNO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REQHEADS-REQNO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REQHEADS-REQNO.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field LOGSYS_FI
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REQHEADS-LOGSYS_FI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REQHEADS-LOGSYS_FI.
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_REQHEADS_STR, 
CLIENT TYPE STRING,
REQNO TYPE STRING,
REQLLINE TYPE STRING,
PCKG_NO TYPE STRING,
LIMIT TYPE STRING,
NO_LIMIT TYPE STRING,
EXP_VALUE TYPE STRING,
SSC_EXIST TYPE STRING,
CON_EXIST TYPE STRING,
TMP_EXIST TYPE STRING,
PRICE_CHG TYPE STRING,
FREE_LIMIT TYPE STRING,
NO_FRLIMIT TYPE STRING,
SERV_TYPE TYPE STRING,
EDITION TYPE STRING,
SSC_LIMIT TYPE STRING,
SSC_NOLIM TYPE STRING,
SSC_PRSCHG TYPE STRING,
SSC_PERC TYPE STRING,
TMP_NUMBER TYPE STRING,
TMP_LIMIT TYPE STRING,
TMP_NOLIM TYPE STRING,
TMP_PRSCHG TYPE STRING,
TMP_PERC TYPE STRING,
CONT_PERC TYPE STRING,
DOC_TYPE TYPE STRING,
PUR_GROUP TYPE STRING,
SHORT_TEXT TYPE STRING,
PLANT TYPE STRING,
TRACKINGNO TYPE STRING,
MAT_GRP TYPE STRING,
DEL_DATCAT TYPE STRING,
DELIV_DATE TYPE STRING,
ITEM_CAT TYPE STRING,
ACCTASSCAT TYPE STRING,
DISTRIB TYPE STRING,
PART_INV TYPE STRING,
GR_IND TYPE STRING,
GR_NON_VAL TYPE STRING,
IR_IND TYPE STRING,
DES_VENDOR TYPE STRING,
FIXED_VEND TYPE STRING,
PURCH_ORG TYPE STRING,
AGREEMENT TYPE STRING,
AGMT_ITEM TYPE STRING,
CURRENCY TYPE STRING,
SHEET_NO TYPE STRING,
EXT_NUMBER TYPE STRING,
PERSON_INT TYPE STRING,
PERSON_EXT TYPE STRING,
LOCATION TYPE STRING,
REF_DATE TYPE STRING,
BEGDATE TYPE STRING,
ENDDATE TYPE STRING,
PO_NUMBER TYPE STRING,
PO_ITEM TYPE STRING,
BLOCK_IND TYPE STRING,
SCORE_TIME TYPE STRING,
SCORE_QUAL TYPE STRING,
DOC_DATE TYPE STRING,
POST_DATE TYPE STRING,
REF_DOC_NO TYPE STRING,
COMM_NO TYPE STRING,
USER_FIELD TYPE STRING,
CO_CODE TYPE STRING,
CATEGORY TYPE STRING,
CATEGORY_ID TYPE STRING,
LOGICAL_SYSTEM TYPE STRING,
PROC_GROUP TYPE STRING,
PROC_ORG TYPE STRING,
PCNUM TYPE STRING,
PCINS TYPE STRING,
PCDATE TYPE STRING,
PCNAME TYPE STRING,
PARTNER TYPE STRING,
PARTNER_GUID TYPE STRING,
GR_RCPT_GUID TYPE STRING,
IV_RCPT_GUID TYPE STRING,
CATALOGID TYPE STRING,
LOGSYS_FI TYPE STRING,
PREQ_NAME TYPE STRING,
EXT_QUOTE_ID TYPE STRING,
EXT_QUOTE_ITEM TYPE STRING,
CATALOGITEM TYPE STRING,
CTR_GUID TYPE STRING,
GR_RCPT_PLANT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_REQHEADS_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_REQHEADS_STR-CLIENT sy-vline 
WA_REQHEADS_STR-REQNO sy-vline 
WA_REQHEADS_STR-REQLLINE sy-vline 
WA_REQHEADS_STR-PCKG_NO sy-vline 
WA_REQHEADS_STR-LIMIT sy-vline 
WA_REQHEADS_STR-NO_LIMIT sy-vline 
WA_REQHEADS_STR-EXP_VALUE sy-vline 
WA_REQHEADS_STR-SSC_EXIST sy-vline 
WA_REQHEADS_STR-CON_EXIST sy-vline 
WA_REQHEADS_STR-TMP_EXIST sy-vline 
WA_REQHEADS_STR-PRICE_CHG sy-vline 
WA_REQHEADS_STR-FREE_LIMIT sy-vline 
WA_REQHEADS_STR-NO_FRLIMIT sy-vline 
WA_REQHEADS_STR-SERV_TYPE sy-vline 
WA_REQHEADS_STR-EDITION sy-vline 
WA_REQHEADS_STR-SSC_LIMIT sy-vline 
WA_REQHEADS_STR-SSC_NOLIM sy-vline 
WA_REQHEADS_STR-SSC_PRSCHG sy-vline 
WA_REQHEADS_STR-SSC_PERC sy-vline 
WA_REQHEADS_STR-TMP_NUMBER sy-vline 
WA_REQHEADS_STR-TMP_LIMIT sy-vline 
WA_REQHEADS_STR-TMP_NOLIM sy-vline 
WA_REQHEADS_STR-TMP_PRSCHG sy-vline 
WA_REQHEADS_STR-TMP_PERC sy-vline 
WA_REQHEADS_STR-CONT_PERC sy-vline 
WA_REQHEADS_STR-DOC_TYPE sy-vline 
WA_REQHEADS_STR-PUR_GROUP sy-vline 
WA_REQHEADS_STR-SHORT_TEXT sy-vline 
WA_REQHEADS_STR-PLANT sy-vline 
WA_REQHEADS_STR-TRACKINGNO sy-vline 
WA_REQHEADS_STR-MAT_GRP sy-vline 
WA_REQHEADS_STR-DEL_DATCAT sy-vline 
WA_REQHEADS_STR-DELIV_DATE sy-vline 
WA_REQHEADS_STR-ITEM_CAT sy-vline 
WA_REQHEADS_STR-ACCTASSCAT sy-vline 
WA_REQHEADS_STR-DISTRIB sy-vline 
WA_REQHEADS_STR-PART_INV sy-vline 
WA_REQHEADS_STR-GR_IND sy-vline 
WA_REQHEADS_STR-GR_NON_VAL sy-vline 
WA_REQHEADS_STR-IR_IND sy-vline 
WA_REQHEADS_STR-DES_VENDOR sy-vline 
WA_REQHEADS_STR-FIXED_VEND sy-vline 
WA_REQHEADS_STR-PURCH_ORG sy-vline 
WA_REQHEADS_STR-AGREEMENT sy-vline 
WA_REQHEADS_STR-AGMT_ITEM sy-vline 
WA_REQHEADS_STR-CURRENCY sy-vline 
WA_REQHEADS_STR-SHEET_NO sy-vline 
WA_REQHEADS_STR-EXT_NUMBER sy-vline 
WA_REQHEADS_STR-PERSON_INT sy-vline 
WA_REQHEADS_STR-PERSON_EXT sy-vline 
WA_REQHEADS_STR-LOCATION sy-vline 
WA_REQHEADS_STR-REF_DATE sy-vline 
WA_REQHEADS_STR-BEGDATE sy-vline 
WA_REQHEADS_STR-ENDDATE sy-vline 
WA_REQHEADS_STR-PO_NUMBER sy-vline 
WA_REQHEADS_STR-PO_ITEM sy-vline 
WA_REQHEADS_STR-BLOCK_IND sy-vline 
WA_REQHEADS_STR-SCORE_TIME sy-vline 
WA_REQHEADS_STR-SCORE_QUAL sy-vline 
WA_REQHEADS_STR-DOC_DATE sy-vline 
WA_REQHEADS_STR-POST_DATE sy-vline 
WA_REQHEADS_STR-REF_DOC_NO sy-vline 
WA_REQHEADS_STR-COMM_NO sy-vline 
WA_REQHEADS_STR-USER_FIELD sy-vline 
WA_REQHEADS_STR-CO_CODE sy-vline 
WA_REQHEADS_STR-CATEGORY sy-vline 
WA_REQHEADS_STR-CATEGORY_ID sy-vline 
WA_REQHEADS_STR-LOGICAL_SYSTEM sy-vline 
WA_REQHEADS_STR-PROC_GROUP sy-vline 
WA_REQHEADS_STR-PROC_ORG sy-vline 
WA_REQHEADS_STR-PCNUM sy-vline 
WA_REQHEADS_STR-PCINS sy-vline 
WA_REQHEADS_STR-PCDATE sy-vline 
WA_REQHEADS_STR-PCNAME sy-vline 
WA_REQHEADS_STR-PARTNER sy-vline 
WA_REQHEADS_STR-PARTNER_GUID sy-vline 
WA_REQHEADS_STR-GR_RCPT_GUID sy-vline 
WA_REQHEADS_STR-IV_RCPT_GUID sy-vline 
WA_REQHEADS_STR-CATALOGID sy-vline 
WA_REQHEADS_STR-LOGSYS_FI sy-vline 
WA_REQHEADS_STR-PREQ_NAME sy-vline 
WA_REQHEADS_STR-EXT_QUOTE_ID sy-vline 
WA_REQHEADS_STR-EXT_QUOTE_ITEM sy-vline 
WA_REQHEADS_STR-CATALOGITEM sy-vline 
WA_REQHEADS_STR-CTR_GUID sy-vline 
WA_REQHEADS_STR-GR_RCPT_PLANT sy-vline      INTO ld_text SEPARATED BY SPACE.

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