go-ora

Pure go oracle client

note:

- Use version 2 you will need to import github.com/sijms/go-ora/v2
- V2 is more preferred for oracle servers 10.2 and above
- I always update the driver fixing issues and add new features so
  always ensure that you get latest release
- See examples for more help

version 2.4.20: Query To Struct

you can query to struct that contain basic types (int, float, string, datetime) or any types that implement sql.Scanner interface
see query to struct example for more information

version 2.4.18: Add support for proxy user

if you need to connect with proxy user pass following connection string

oracle://proxy_user:proxy_password@host:port/service?proxy client name=schema_owner

version 2.4.8: JDBC connect string

Add new function go_ora.BuildJDBC

    // program will extract server, ports and protocol and build
    // connection table
    connStr := `(DESCRIPTION=
    (ADDRESS_LIST=
    	(LOAD_BALANCE=OFF)
        (FAILOVER=ON)
    	(address=(PROTOCOL=tcps)(host=localhost)(PORT=2484))
    	(address=(protocol=tcp)(host=localhost)(port=1521))
    )
    (CONNECT_DATA=
    	(SERVICE_NAME=service)
        (SERVER=DEDICATED)
    )
    (SOURCE_ROUTE=yes)
    )`
    // use urlOption to set other options like:
    // TRACE FILE = for debug
    // note SSL automatically set from connStr (address=...
    // SSL Verify = need to cancel certifiate verification
    // wallet path
    databaseUrl := go_ora.BuildJDBC(user, password, connStr, urlOptions)
    conn, err := sql.Open("oracle", databaseUrl)
	if err != nil {
		fmt.Println(err)
		return
	}
    err = conn.Ping()
	if err != nil {
		fmt.Println(err)
		return
	}

version 2.4.5: Support BFile

connect as sys and create directory object that refer to physical directory
grant read,write on directory 'dirName' to user
put text file in the directory with name = fileName

// create and open connection before use BFile
conn, err := go_ora.NewConnection(connStr)
// check for error
err = conn.Open()
// check for error
defer conn.Close()

// Create BFile object
file, err := go_ora.BFile(conn, dirName, fileName)
// check for error

// before use BFile it must be opened
err = file.Open()
// check for error
defer file.Close()

// does the file exist
exists, err := file.Exists()
// check for error

if exists {
    length, err := file.GetLength()
    // check for error
    
    // read all data
    data, err := file.Read()
    
    // read at position 2
    data, err = file.ReadFromPos(2)
    
    // read 5 bytes count start at position 2
    data, err = file.ReadBytesFromPos(2, 5)

you can pass BFile object as input parameter or receive it from query or output parameters for more detail see example bfile

version 2.4.4: Support for unix socket IPC

you can use this option if server and client on same linux machine by specify the following url option

urlOptions := map[string]string{
	// change the value according to your machine
	"unix socket": "/usr/tmp/.oracle/sEXTPROC1"
}

version 2.4.3: Input Parameter CLOB and BLOB Accept Large Data Size

you can pass input CLOB and BLOB with any data size up to data type limit

version 2.4.1: Add support for connection time out + context read and write

you can determine connection overall lifetime through url options

// set connection time for 3 second
urlOptions := map[string]string {
    "CONNECTION TIMEOUT": "3"
}
databaseUrl := go_ora.BuildUrl(server, port, service, user, password, urlOptions)

see context example for more help about using context

version 2.4.0: Add support for Arrays

add support for oracle associative array as input and output parameter type
add BulkInsert function which dramatically improve performance (> 10x) during insert
add support for nullable type in DataSet.Scan function
Bug fixes
examples (bulk_insert and arrays) contain explanation of use of this 2 major features

// sqlText: sql text with parameters
// rowNum: number of rows to insert
// columns: each column contain array of driver.Value size of column should
//          equal to rowNum
func (conn *Connection) BulkInsert(sqlText string, rowNum int, columns ...[]driver.Value) (*QueryResult, error)

version 2.3.5: Add support for OS Auth (Windows) With Password Hash

now you can pass password hash of the user instead of real password

source of hash:

windows registry
create the hash by md4(unicode(password)) passing hash through url option as follow

urlOptions := map[string]string {
	"OS HASH": "yourpasswordhash"
	// or
	"OS PassHash": "yourpasswordhash"
	// or
	"OS Password Hash": "yourpasswordhash"
}

note:

you can use NTSAuthInterface

type YourCustomNTSManager struct {
	NTSAuthDefault
}
func (nts *NTSAuthHash) ProcessChallenge(chaMsgData []byte, user, password string) ([]byte, error) {
    // password = get (extract) password hash from Windows registry
	return ntlmssp.ProcessChallengeWithHash(chaMsgData, user, password)
}
// now you can pass empty user and password to the driver

version 2.3.3: Add support for OS Auth (Windows)

you can see windows_os_auth example for more detail

NTS packets are supplied from the following github package: go-ntlmssp
empty username or password will suppose OS Auth by default
AUTH TYPE: "OS" optional
OS USER optional if omit the client will use logon user
OS PASS is obligatory to make OS Auth using NTS
DOMAIN optional for windows domain
AUTH SERV: "NTS" optional as NTS is automatically added if the client running on Windows machine
DBA PRIVILEGE: "SYSDBA" optional if you need a SYSDBA access

urlOptions := map[string]string{
    // automatically set if you pass an empty oracle user or password
    // otherwise you need to set it
    "AUTH TYPE": "OS",
    // operating system user if empty the driver will use logon user name
    "OS USER": user,
    // operating system password needed for os logon
     "OS PASS": password,
    // Windows system domain name
    "DOMAIN": domain,
    // NTS is the required for Windows os authentication
    // when you run the program from Windows machine it will be added automatically
    // otherwise you need to specify it
    "AUTH SERV": "NTS",
    // uncomment this option for debugging
    "TRACE FILE": "trace.log",
}
databaseUrl := go_ora.BuildUrl(server, port, service, "", "", urlOptions)

note (Remote OS Auth):

you can make OS Auth on the same machine (Windows Server) or different machine (Windows Server) and (Other Client) and in this situation you need to pass AUTH SERV: "NTS" as url parameter

note (advanced users):

You can use custom NTS auth manager by implementing the following interface

type NTSAuthInterface interface {
	NewNegotiateMessage(domain, machine string) ([]byte, error)
	ProcessChallenge(chaMsgData []byte, user, password string) ([]byte, error)
}

set newNTS auth manager before open the connection

go_ora.SetNTSAuth(newNTSManager)

advantage of custom manager: you may not need to provide OS Password. for example using .NET or Windows API code as original driver

// CustomStream will take data from NegotiateStream and give it to the driver
// through NewNegotiateMessage
// Then take data form the driver (Challenge Message) to NegotiateStream
// And return back Authentication msg to the driver through ProcessChallenge
// as you see here CredentialCache.DefaultNetworkCredentials will take auth data
// (username and password) from logon user
new NegotiateStream(new YourCustomStream(), true).AuthenticateAsClient(CredentialCache.DefaultNetworkCredentials, "", ProtectionLevel.None, TokenImpersonationLevel.Identification);

version 2.3.1: Fix issue related to use ipv6

now you can define url that contain ipv6

url := go_ora.BuildUrl("::1", 1521, "service", "user", "password", nil)
url = "oracle://user:password@[::1]:1521/service"

version 2.3.0: Add support for Nullable types

support for nullable type in output parameters
add more nullable type NullTimeStamp and NullNVarChar

version 2.2.25: Add support for User Defined Type (UDT) as input and output parameter

see example udt_pars for more help

version 2.2.23: User Defined Type (UDT) as input parameters

Add support for UDT as input parameter
Add go_ora.Out struct with Size member to set output parameter size

version 2.2.22: Lob for output parameters

Add new types for output parameter which is go_ora.Clob and go_ora.Blob used for receiving Clob and Blob from output parameters see clob example for more details
Fix some issue related to reading output parameters
Fix issue related to reading user defined type UDT

version 2.2.19: improve lob reading with high prefetch rows value

Now Prefetch rows value is automatically calculated (when left with its default value = 25) according to column size
Reading lob is retarded until all record has been read this fix error happen when you try to read lob with large PREFETCH_ROWS value

version 2.2.9: add support for connect to multiple servers

define multiple server in 2 way

in url string options

// using url options
databaseURL := "oracle://user:pass@server1/service?server=server2&server=server3"
/* now the driver will try connection as follow
1- server1
2- server2
3- server3
*/

using BuildUrl function

urlOptions := map[string] string {
    "TRACE FILE": "trace.log",
    "SERVER": "server2, server3",
    "PREFETCH_ROWS": "500",
    //"SSL": "enable",
    //"SSL Verify": "false",
}
databaseURL := go_ora.BuildUrl(server1, 1521, "service", "user", "pass", urlOptions)

version 2.2.8: add OracleError class

OracleError carry error message from the server

version 2.2.7: Add support for user defined types

this feature is now tested against these oracle versions 10.2, 12.2, 19.3.
RegisterType function need extra parameter owner (oracle user who create the type).

version 2.2.6 (pre-release - experimental): Add support for user defined types

to use make the following (oracle 12c)

define custom type in the oracle

create or replace TYPE TEST_TYPE1 IS OBJECT 
( 
    TEST_ID NUMBER(6, 0),
    TEST_NAME VARCHAR2(10)
)

define struct in go with tag

type test1 struct {
    // note use int64 not int
    // all tagged fields should be exported 
    // tag name:field_name --> case insensitive
    Id int64       `oracle:"name:test_id"`
    Name string    `oracle:"name:test_name"`
}

connect to database

databaseURL := go_ora.BuildUrl("localhost", 1521, "service", "user", "pass", nil)
conn, err := sql.Open("oracle", databaseURL)
// check for err
err = conn.Ping()
// check for err
defer func() {
    err := conn.Close()
    // check for err
}()

register type

if drv, ok := conn.Driver().(*go_ora.OracleDriver); ok {
    err = drv.Conn.RegisterType("owner", "TEST_TYPE1", test1{})
    // check for err
}

select and display data

rows, err := conn.Query("SELECT test_type1(10, 'test') from dual")
// check for err
var test test1
for rows.Next() {
    err = rows.Scan(&test)
    // check for err
    fmt.Println(test)
}

version 2.2.5

add function go_ora.BuildUrl to escape special characters

version 2.2.4

add support for tcps. you can enable tcps through the following url options
this link explain how to enable tcps in your server

wallet=wallet_dir // wallet should contain server and client certificates
SSL=true          // true or enabled
SSL Verify=false  // to bypass certificate verification

version 2.1.23

now support auto-login oracle wallet (non-local)
note: to use wallet you need to specify directory path for wallet the directory should contain cwallet.sso file "the file that will be used"

sqlQuery := "oracle://[email protected]:1522/service"
sqlQuery += "?TRACE FILE=trace.log"
sqlQuery += "&wallet=path_to_wallet_directory"
conn, err := sql.open("oracle", sqlQuery)

server:port/service ---> should be supplied when using wallet

user ---> is optional when omitted the reader will return first matched dsn

password ---> should be empty as it will be supplied from wallet

version 2.1.22

now support data packet integrity check using MD5, SHA1, SHA256, SHA384, SHA512
key is exchanged between server and client using Diffie Hellman method
note: to enable data integrity check add the following line to sqlnet.ora of the server

# possible values ([accepted | rejected | requested | required])
SQLNET.CRYPTO_CHECKSUM_SERVER = required
# possible values ([MD5 | SHA1 | SHA256 | SHA384 | SHA512])
SQLNET.CRYPTO_CHECKSUM_TYPES_SERVER = SHA512

version 2.1.21

now support data packet encryption using AES.
key is exchanged between server and client using Diffie Hellman method
note: to enable AES encryption add the following line to sqlnet.ora of the server

# possible values ([accepted | rejected | requested | required])
SQLNET.ENCRYPTION_SERVER = required
# possible values for AES (AES256 | AES192 | AES128)
SQLNET.ENCRYPTION_TYPES_SERVER = AES256

version 2.1.20

add new type go_ora.NVarChar now you can pass string parameter in 2 way:

1- varchar string:

_, err := conn.Exec(inputSql, "7586")

2- nvarchar string:

_, err := conn.Exec(inputSql, go_ora.NVarChar("7586"))

version 2.1.19

support more charsets (0x33D, 0x33E, 0x33F, 0x340, 0x352, 0x353, 0x354)

version 2.0-beta

update client version to 317
update ttc version to: 9
use 4 byte packet length instead of 2 bytes
use advanced negotiation
use big clear chunks
use more verifier type in authentication object

Usage:

there are 2 way to use the client

A. Using sql/database interface

1- importing:

import (
  "database/sql"
  _ "github.com/sijms/go-ora/v2"
)

2- create the connection

conn, err := sql.Open("oracle", "oracle://user:pass@server/service_name")
// check for error
defer conn.Close()

3- create statment

stmt, err := conn.Prepare("SELECT col_1, col_2, col_3 FROM table WHERE col_1 = :1 or col_2 = :2")
// check for error
defer stmt.CLose()

4- query

// suppose we have 2 params one time.Time and other is double
rows, err := stmt.Query(time.Date(2020, 9, 1, 0, 0, 0, 0, time.UTC), 9.2)
// check for error
defer rows.Close()

5- extract data using next

 for rows.Next() {
    // define vars
    err = rows.Scan(/*vars here */)
    // check for error
 }

6- use exec instead of query for update and insert stmt

// i make change in parameter no 4 to explain that you can use string in parameter name instead of numbers
stmt, err := conn.Prepare("UPDATE table SET col_1=:1, col_2=:2 WHERE col_3 = :3 or col_4 = :col_4_par")
// check for error
defer stmt.Close()
result, err := stmt.Exec(/*pars value*/)
// check for error
fmt.Println(result.RowsAffected())

7- using transaction:

// after step 2 "Create Connection"
tx, err := conn.Begin()
// check for error
stmt, err := tx.Prepare("sql text")
// check for error
// continue as above
tx.Commit()
// or
tx.Rollback()
// note: any stmt created from conn will not be committed or rolled back

B. direct use of the package

the benefit here is that you can use pl/sql and output parameters

1- import go_ora "go-ora"

2- create connection

conn, err := go_ora.NewConnection("oracle://user:pass@server/service_name")
// check for error
err = conn.Open()
// check for error
defer conn.Close()

2- create stmt

stmt := go_ora.NewStmt("sql or pl/sql text", conn)
defer stmt.Close()

3- add parameters

stmt.AddParam("name", value, size, go_ora.Input /* or go_ora.Output*/)
// note that size is need when you define string output parameters

4- exec or query as above and pass nil for parameters

5- after that you can read the output parameters using Pars variable of stmt structure

Server's URL options

The complete syntax of connection url is:

oracle://user:pass@server/service_name[?OPTION1=VALUE1[&OPTIONn=VALUEn]...]

Check possible options in connection_string.go

TRACE FILE

This option enables logging driver activity and packet content into a file.

oracle://user:pass@server/service_name?TRACE FILE=trace.log

The log file is created into the current directory.

This produce this kind of log:

2020-11-22T07:51:42.8137: Open :(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=192.168.10.10)(PORT=1521))(CONNECT_DATA=(SERVICE_NAME=xe)(CID=(PROGRAM=C:\Users\Me\bin\hello_ora.exe)(HOST=workstation)(USER=Me))))
2020-11-22T07:51:42.8147: Connect
2020-11-22T07:51:42.8256: 
Write packet:
00000000  00 3a 00 00 01 00 00 00  01 38 01 2c 0c 01 ff ff  |.:.......8.,....|
00000010  ff ff 4f 98 00 00 00 01  00 ea 00 3a 00 00 00 00  |..O........:....|
00000020  04 04 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00000030  00 00 00 00 00 00 00 00  00 00                    |..........|

...

2020-11-22T07:51:42.8705: Query:
SELECT * FROM v$version
2020-11-22T07:51:42.8705: 
Write packet:
00000000  00 55 00 00 06 00 00 00  00 00 03 5e 00 02 81 21  |.U.........^...!|
00000010  00 01 01 17 01 01 0d 00  00 00 01 19 01 01 00 00  |................|
00000020  00 00 00 00 00 00 00 00  00 01 00 00 00 00 00 53  |...............S|
00000030  45 4c 45 43 54 20 2a 20  46 52 4f 4d 20 76 24 76  |ELECT * FROM v$v|
00000040  65 72 73 69 6f 6e 01 01  00 00 00 00 00 00 01 01  |ersion..........|
00000050  00 00 00 00 00                                    |.....|
2020-11-22T07:51:42.9094: 
Read packet:
00000000  01 a7 00 00 06 00 00 00  00 00 10 17 3f d5 ec 21  |............?..!|
00000010  d5 37 e0 67 cc 0f eb 03  cc c5 d1 d8 78 78 0b 15  |.7.g........xx..|
00000020  0c 21 20 01 50 01 01 51  01 80 00 00 01 50 00 00  |.! .P..Q.....P..|
00000030  00 00 02 03 69 01 01 50  01 06 01 06 06 42 41 4e  |....i..P.....BAN|
00000040  4e 45 52 00 00 00 00 01  07 07 78 78 0b 16 07 34  |NER.......xx...4|
00000050  2b 00 02 1f e8 01 0a 01  0a 00 06 22 01 01 00 01  |+.........."....|
00000060  19 00 00 00 07 49 4f 72  61 63 6c 65 20 44 61 74  |.....IOracle Dat|
00000070  61 62 61 73 65 20 31 31  67 20 45 78 70 72 65 73  |abase 11g Expres|
00000080  73 20 45 64 69 74 69 6f  6e 20 52 65 6c 65 61 73  |s Edition Releas|
00000090  65 20 31 31 2e 32 2e 30  2e 32 2e 30 20 2d 20 36  |e 11.2.0.2.0 - 6|
000000a0  34 62 69 74 20 50 72 6f  64 75 63 74 69 6f 6e 07  |4bit Production.|
000000b0  26 50 4c 2f 53 51 4c 20  52 65 6c 65 61 73 65 20  |&PL/SQL Release |
000000c0  31 31 2e 32 2e 30 2e 32  2e 30 20 2d 20 50 72 6f  |11.2.0.2.0 - Pro|
000000d0  64 75 63 74 69 6f 6e 15  01 01 01 07 1a 43 4f 52  |duction......COR|
000000e0  45 09 31 31 2e 32 2e 30  2e 32 2e 30 09 50 72 6f  |E.11.2.0.2.0.Pro|
000000f0  64 75 63 74 69 6f 6e 15  01 01 01 07 2e 54 4e 53  |duction......TNS|
00000100  20 66 6f 72 20 4c 69 6e  75 78 3a 20 56 65 72 73  | for Linux: Vers|
00000110  69 6f 6e 20 31 31 2e 32  2e 30 2e 32 2e 30 20 2d  |ion 11.2.0.2.0 -|
00000120  20 50 72 6f 64 75 63 74  69 6f 6e 15 01 01 01 07  | Production.....|
00000130  26 4e 4c 53 52 54 4c 20  56 65 72 73 69 6f 6e 20  |&NLSRTL Version |
00000140  31 31 2e 32 2e 30 2e 32  2e 30 20 2d 20 50 72 6f  |11.2.0.2.0 - Pro|
00000150  64 75 63 74 69 6f 6e 08  01 06 03 14 97 b7 00 01  |duction.........|
00000160  01 01 02 00 00 00 00 00  04 01 05 01 07 01 05 02  |................|
00000170  05 7b 00 00 01 01 00 03  00 01 20 00 00 00 00 00  |.{........ .....|
00000180  00 00 00 00 00 00 00 01  01 00 00 00 00 19 4f 52  |..............OR|
00000190  41 2d 30 31 34 30 33 3a  20 6e 6f 20 64 61 74 61  |A-01403: no data|
000001a0  20 66 6f 75 6e 64 0a                              | found.|
2020-11-22T07:51:42.9104: Summary: RetCode:1403, Error Message:"ORA-01403: no data found\n"
2020-11-22T07:51:42.9104: Row 0
2020-11-22T07:51:42.9104:   BANNER              : Oracle Database 11g Express Edition Release 11.2.0.2.0 - 64bit Production
2020-11-22T07:51:42.9104: Row 1
2020-11-22T07:51:42.9104:   BANNER              : PL/SQL Release 11.2.0.2.0 - Production
2020-11-22T07:51:42.9104: Row 2
2020-11-22T07:51:42.9104:   BANNER              : CORE	11.2.0.2.0	Production
2020-11-22T07:51:42.9104: Row 3
2020-11-22T07:51:42.9104:   BANNER              : TNS for Linux: Version 11.2.0.2.0 - Production
2020-11-22T07:51:42.9104: Row 4
2020-11-22T07:51:42.9104:   BANNER              : NLSRTL Version 11.2.0.2.0 - Production
2020-11-22T07:51:42.9114:

PREFETCH_ROWS

Default value is 25 increase this value to higher level will significantly speed up the query

RefCursor

note: See examples for using RefCursor with sql package

to use RefCursor follow these steps:

create the connection object and open
create NewStmt from connection
pass RefCursorParam
cast parameter to go_ora.RefCursor
call cursor.Query()
reterive records use for loop

code:

urlOptions := map[string] string {
	"trace file": "trace.log" ,
}
databaseURL := go_ora.BuildUrl(server, port, service, user, password, urlOptions)
conn, err := sql.Open("oracle", databaseURL)
// check error

err = conn.Ping()
// check error

defer conn.Close()

cmdText := `BEGIN    
    proc_1(:1); 
end;`
var cursor go_ora.RefCursor
_, err = conn.Exec(cmdText, sql.Out{Dest: &cursor})
//check errors

defer cursor.Close()
rows, err := cursor.Query()
// check for error

var (
    var_1 int64
    var_2 string
)
for rows.Next_() {
    err = rows.Scan(&var_1, &var_2)
    // check for error
	fmt.Println(var_1, var_2)
}

Name		Name	Last commit message	Last commit date
Latest commit History 338 Commits
converters		converters
examples		examples
network		network
trace		trace
v2		v2
.gitignore		.gitignore
LICENSE		LICENSE
README.md		README.md
auth_object.go		auth_object.go
command.go		command.go
connection.go		connection.go
connection_string.go		connection_string.go
data_set.go		data_set.go
data_type_nego.go		data_type_nego.go
db_version.go		db_version.go
go.mod		go.mod
lob.go		lob.go
oracletype_string.go		oracletype_string.go
parameter.go		parameter.go
ref_cursor.go		ref_cursor.go
request_float_test.go		request_float_test.go
rowid.go		rowid.go
simple_object.go		simple_object.go
tcp_protocol_nego.go		tcp_protocol_nego.go
transaction.go		transaction.go

License

gotochkin/go-ora

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go-ora

Pure go oracle client

note:

version 2.4.20: Query To Struct

version 2.4.18: Add support for proxy user

version 2.4.8: JDBC connect string

version 2.4.5: Support BFile

version 2.4.4: Support for unix socket IPC

version 2.4.3: Input Parameter CLOB and BLOB Accept Large Data Size

version 2.4.1: Add support for connection time out + context read and write

version 2.4.0: Add support for Arrays

version 2.3.5: Add support for OS Auth (Windows) With Password Hash

source of hash:

note:

version 2.3.3: Add support for OS Auth (Windows)

note (Remote OS Auth):

note (advanced users):

version 2.3.1: Fix issue related to use ipv6

version 2.3.0: Add support for Nullable types

version 2.2.25: Add support for User Defined Type (UDT) as input and output parameter

version 2.2.23: User Defined Type (UDT) as input parameters

version 2.2.22: Lob for output parameters

version 2.2.19: improve lob reading with high prefetch rows value

version 2.2.9: add support for connect to multiple servers

version 2.2.8: add OracleError class

version 2.2.7: Add support for user defined types

version 2.2.6 (pre-release - experimental): Add support for user defined types

version 2.2.5

version 2.2.4

version 2.1.23

server:port/service ---> should be supplied when using wallet

user ---> is optional when omitted the reader will return first matched dsn

password ---> should be empty as it will be supplied from wallet

version 2.1.22

version 2.1.21

version 2.1.20

1- varchar string:

2- nvarchar string:

version 2.1.19

version 2.0-beta

Usage:

there are 2 way to use the client

A. Using sql/database interface

1- importing:

2- create the connection

3- create statment

4- query

5- extract data using next

6- use exec instead of query for update and insert stmt

7- using transaction:

B. direct use of the package

1- import go_ora "go-ora"

2- create connection

2- create stmt

3- add parameters

4- exec or query as above and pass nil for parameters

5- after that you can read the output parameters using Pars variable of stmt structure

Server's URL options

TRACE FILE

PREFETCH_ROWS

RefCursor

note: See examples for using RefCursor with sql package

code:

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