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Update to latest mssqldriver (#7613)

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* New driver does not tolerate USE - handle this by closing db and reopening db in the new dbname
This commit is contained in:
zeripath
2019-07-26 05:10:20 +01:00
committed by GitHub
parent bebc6a3c77
commit 78e5317242
31 changed files with 2376 additions and 598 deletions
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125
vendor/github.com/denisenkom/go-mssqldb/README.md generated vendored
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@@ -21,13 +21,12 @@ Other supported formats are listed below.
* `user id` - enter the SQL Server Authentication user id or the Windows Authentication user id in the DOMAIN\User format. On Windows, if user id is empty or missing Single-Sign-On is used.
* `password`
* `database`
* `connection timeout` - in seconds (default is 30)
* `dial timeout` - in seconds (default is 5)
* `connection timeout` - in seconds (default is 0 for no timeout), set to 0 for no timeout. Recommended to set to 0 and use context to manage query and connection timeouts.
* `dial timeout` - in seconds (default is 15), set to 0 for no timeout
* `encrypt`
* `disable` - Data send between client and server is not encrypted.
* `false` - Data sent between client and server is not encrypted beyond the login packet. (Default)
* `true` - Data sent between client and server is encrypted.
* `keepAlive` - in seconds; 0 to disable (default is 30)
* `app name` - The application name (default is go-mssqldb)
### Connection parameters for ODBC and ADO style connection strings:
@@ -37,6 +36,7 @@ Other supported formats are listed below.
### Less common parameters:
* `keepAlive` - in seconds; 0 to disable (default is 30)
* `failoverpartner` - host or host\instance (default is no partner).
* `failoverport` - used only when there is no instance in failoverpartner (default 1433)
* `packet size` - in bytes; 512 to 32767 (default is 4096)
@@ -68,14 +68,14 @@ Other supported formats are listed below.
* `sqlserver://username:password@host:port?param1=value&param2=value`
* `sqlserver://sa@localhost/SQLExpress?database=master&connection+timeout=30` // `SQLExpress instance.
* `sqlserver://sa:mypass@localhost?database=master&connection+timeout=30` // username=sa, password=mypass.
* `sqlserver://sa:mypass@localhost:1234?database=master&connection+timeout=30"` // port 1234 on localhost.
* `sqlserver://sa:mypass@localhost:1234?database=master&connection+timeout=30` // port 1234 on localhost.
* `sqlserver://sa:my%7Bpass@somehost?connection+timeout=30` // password is "my{pass"
A string of this format can be constructed using the `URL` type in the `net/url` package.
```go
query := url.Values{}
query.Add("connection timeout", "30")
query.Add("app name", "MyAppName")
u := &url.URL{
Scheme: "sqlserver",
@@ -90,14 +90,14 @@ Other supported formats are listed below.
2. ADO: `key=value` pairs separated by `;`. Values may not contain `;`, leading and trailing whitespace is ignored.
Examples:
* `server=localhost\\SQLExpress;user id=sa;database=master;connection timeout=30`
* `server=localhost;user id=sa;database=master;connection timeout=30`
* `server=localhost\\SQLExpress;user id=sa;database=master;app name=MyAppName`
* `server=localhost;user id=sa;database=master;app name=MyAppName`
3. ODBC: Prefix with `odbc`, `key=value` pairs separated by `;`. Allow `;` by wrapping
values in `{}`. Examples:
* `odbc:server=localhost\\SQLExpress;user id=sa;database=master;connection timeout=30`
* `odbc:server=localhost;user id=sa;database=master;connection timeout=30`
* `odbc:server=localhost\\SQLExpress;user id=sa;database=master;app name=MyAppName`
* `odbc:server=localhost;user id=sa;database=master;app name=MyAppName`
* `odbc:server=localhost;user id=sa;password={foo;bar}` // Value marked with `{}`, password is "foo;bar"
* `odbc:server=localhost;user id=sa;password={foo{bar}` // Value marked with `{}`, password is "foo{bar"
* `odbc:server=localhost;user id=sa;password={foobar }` // Value marked with `{}`, password is "foobar "
@@ -113,11 +113,81 @@ To run a stored procedure, set the query text to the procedure name:
var account = "abc"
_, err := db.ExecContext(ctx, "sp_RunMe",
sql.Named("ID", 123),
sql.Out{Dest{sql.Named("Account", &account)}
sql.Named("Account", sql.Out{Dest: &account}),
)
```
## Statement Parameters
## Reading Output Parameters from a Stored Procedure with Resultset
To read output parameters from a stored procedure with resultset, make sure you read all the rows before reading the output parameters:
```go
sqltextcreate := `
CREATE PROCEDURE spwithoutputandrows
@bitparam BIT OUTPUT
AS BEGIN
SET @bitparam = 1
SELECT 'Row 1'
END
`
var bitout int64
rows, err := db.QueryContext(ctx, "spwithoutputandrows", sql.Named("bitparam", sql.Out{Dest: &bitout}))
var strrow string
for rows.Next() {
err = rows.Scan(&strrow)
}
fmt.Printf("bitparam is %d", bitout)
```
## Caveat for local temporary tables
Due to protocol limitations, temporary tables will only be allocated on the connection
as a result of executing a query with zero parameters. The following query
will, due to the use of a parameter, execute in its own session,
and `#mytemp` will be de-allocated right away:
```go
conn, err := pool.Conn(ctx)
defer conn.Close()
_, err := conn.ExecContext(ctx, "select @p1 as x into #mytemp", 1)
// at this point #mytemp is already dropped again as the session of the ExecContext is over
```
To work around this, always explicitly create the local temporary
table in a query without any parameters. As a special case, the driver
will then be able to execute the query directly on the
connection-scoped session. The following example works:
```go
conn, err := pool.Conn(ctx)
// Set us up so that temp table is always cleaned up, since conn.Close()
// merely returns conn to pool, rather than actually closing the connection.
defer func() {
_, _ = conn.ExecContext(ctx, "drop table #mytemp") // always clean up
conn.Close() // merely returns conn to pool
}()
// Since we not pass any parameters below, the query will execute on the scope of
// the connection and succeed in creating the table.
_, err := conn.ExecContext(ctx, "create table #mytemp ( x int )")
// #mytemp is now available even if you pass parameters
_, err := conn.ExecContext(ctx, "insert into #mytemp (x) values (@p1)", 1)
```
## Return Status
To get the procedure return status, pass into the parameters a
`*mssql.ReturnStatus`. For example:
```
var rs mssql.ReturnStatus
_, err := db.ExecContext(ctx, "theproc", &rs)
log.Printf("status=%d", rs)
```
## Parameters
The `sqlserver` driver uses normal MS SQL Server syntax and expects parameters in
the sql query to be in the form of either `@Name` or `@p1` to `@pN` (ordinal position).
@@ -126,6 +196,37 @@ the sql query to be in the form of either `@Name` or `@p1` to `@pN` (ordinal pos
db.QueryContext(ctx, `select * from t where ID = @ID and Name = @p2;`, sql.Named("ID", 6), "Bob")
```
### Parameter Types
To pass specific types to the query parameters, say `varchar` or `date` types,
you must convert the types to the type before passing in. The following types
are supported:
* string -> nvarchar
* mssql.VarChar -> varchar
* time.Time -> datetimeoffset or datetime (TDS version dependent)
* mssql.DateTime1 -> datetime
* mssql.DateTimeOffset -> datetimeoffset
* "cloud.google.com/go/civil".Date -> date
* "cloud.google.com/go/civil".DateTime -> datetime2
* "cloud.google.com/go/civil".Time -> time
* mssql.TVP -> Table Value Parameter (TDS version dependent)
## Important Notes
* [LastInsertId](https://golang.org/pkg/database/sql/#Result.LastInsertId) should
not be used with this driver (or SQL Server) due to how the TDS protocol
works. Please use the [OUTPUT Clause](https://docs.microsoft.com/en-us/sql/t-sql/queries/output-clause-transact-sql)
or add a `select ID = convert(bigint, SCOPE_IDENTITY());` to the end of your
query (ref [SCOPE_IDENTITY](https://docs.microsoft.com/en-us/sql/t-sql/functions/scope-identity-transact-sql)).
This will ensure you are getting the correct ID and will prevent a network round trip.
* [NewConnector](https://godoc.org/github.com/denisenkom/go-mssqldb#NewConnector)
may be used with [OpenDB](https://golang.org/pkg/database/sql/#OpenDB).
* [Connector.SessionInitSQL](https://godoc.org/github.com/denisenkom/go-mssqldb#Connector.SessionInitSQL)
may be set to set any driver specific session settings after the session
has been reset. If empty the session will still be reset but use the database
defaults in Go1.10+.
## Features
* Can be used with SQL Server 2005 or newer
@@ -154,7 +255,7 @@ These features still exist in the driver, but they are are deprecated.
### Query Parameter Token Replace (driver "mssql")
If you use the driver name "mssql" (rather then "sqlserver" the SQL text
If you use the driver name "mssql" (rather then "sqlserver") the SQL text
will be loosly parsed and an attempt to extract identifiers using one of
* ?