validate inputs
This commit is contained in:
Michael McGuinness
+59
-46
@@ -27,7 +27,9 @@ You can also connect to a database using a URL. For example:
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connStr := "postgres://pqgotest:password@localhost/pqgotest?sslmode=verify-full"
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db, err := sql.Open("postgres", connStr)
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# Connection String Parameters
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Connection String Parameters
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Similarly to libpq, when establishing a connection using pq you are expected to
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supply a connection string containing zero or more parameters.
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@@ -40,42 +42,42 @@ them in the options parameter.
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For compatibility with libpq, the following special connection parameters are
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supported:
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- dbname - The name of the database to connect to
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- user - The user to sign in as
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- password - The user's password
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- host - The host to connect to. Values that start with / are for unix
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domain sockets. (default is localhost)
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- port - The port to bind to. (default is 5432)
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- sslmode - Whether or not to use SSL (default is require, this is not
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the default for libpq)
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- fallback_application_name - An application_name to fall back to if one isn't provided.
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- connect_timeout - Maximum wait for connection, in seconds. Zero or
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not specified means wait indefinitely.
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- sslcert - Cert file location. The file must contain PEM encoded data.
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- sslkey - Key file location. The file must contain PEM encoded data.
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- sslrootcert - The location of the root certificate file. The file
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must contain PEM encoded data.
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* dbname - The name of the database to connect to
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* user - The user to sign in as
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* password - The user's password
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* host - The host to connect to. Values that start with / are for unix
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domain sockets. (default is localhost)
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* port - The port to bind to. (default is 5432)
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* sslmode - Whether or not to use SSL (default is require, this is not
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the default for libpq)
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* fallback_application_name - An application_name to fall back to if one isn't provided.
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* connect_timeout - Maximum wait for connection, in seconds. Zero or
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not specified means wait indefinitely.
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* sslcert - Cert file location. The file must contain PEM encoded data.
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* sslkey - Key file location. The file must contain PEM encoded data.
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* sslrootcert - The location of the root certificate file. The file
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must contain PEM encoded data.
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Valid values for sslmode are:
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- disable - No SSL
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- require - Always SSL (skip verification)
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- verify-ca - Always SSL (verify that the certificate presented by the
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server was signed by a trusted CA)
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- verify-full - Always SSL (verify that the certification presented by
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the server was signed by a trusted CA and the server host name
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matches the one in the certificate)
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* disable - No SSL
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* require - Always SSL (skip verification)
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* verify-ca - Always SSL (verify that the certificate presented by the
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server was signed by a trusted CA)
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* verify-full - Always SSL (verify that the certification presented by
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the server was signed by a trusted CA and the server host name
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matches the one in the certificate)
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See http://www.postgresql.org/docs/current/static/libpq-connect.html#LIBPQ-CONNSTRING
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for more information about connection string parameters.
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Use single quotes for values that contain whitespace:
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"user=pqgotest password='with spaces'"
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"user=pqgotest password='with spaces'"
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A backslash will escape the next character in values:
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"user=space\ man password='it\'s valid'"
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"user=space\ man password='it\'s valid'"
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Note that the connection parameter client_encoding (which sets the
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text encoding for the connection) may be set but must be "UTF8",
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@@ -96,7 +98,9 @@ provided connection parameters.
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The pgpass mechanism as described in http://www.postgresql.org/docs/current/static/libpq-pgpass.html
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is supported, but on Windows PGPASSFILE must be specified explicitly.
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# Queries
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Queries
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database/sql does not dictate any specific format for parameter
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markers in query strings, and pq uses the Postgres-native ordinal markers,
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@@ -121,7 +125,9 @@ For more details on RETURNING, see the Postgres documentation:
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For additional instructions on querying see the documentation for the database/sql package.
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# Data Types
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Data Types
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Parameters pass through driver.DefaultParameterConverter before they are handled
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by this package. When the binary_parameters connection option is enabled,
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@@ -129,27 +135,30 @@ by this package. When the binary_parameters connection option is enabled,
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This package returns the following types for values from the PostgreSQL backend:
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- integer types smallint, integer, and bigint are returned as int64
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- floating-point types real and double precision are returned as float64
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- character types char, varchar, and text are returned as string
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- temporal types date, time, timetz, timestamp, and timestamptz are
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returned as time.Time
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- the boolean type is returned as bool
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- the bytea type is returned as []byte
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- integer types smallint, integer, and bigint are returned as int64
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- floating-point types real and double precision are returned as float64
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- character types char, varchar, and text are returned as string
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- temporal types date, time, timetz, timestamp, and timestamptz are
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returned as time.Time
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- the boolean type is returned as bool
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- the bytea type is returned as []byte
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All other types are returned directly from the backend as []byte values in text format.
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# Errors
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Errors
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pq may return errors of type *pq.Error which can be interrogated for error details:
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if err, ok := err.(*pq.Error); ok {
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fmt.Println("pq error:", err.Code.Name())
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}
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if err, ok := err.(*pq.Error); ok {
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fmt.Println("pq error:", err.Code.Name())
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}
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See the pq.Error type for details.
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# Bulk imports
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Bulk imports
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You can perform bulk imports by preparing a statement returned by pq.CopyIn (or
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pq.CopyInSchema) in an explicit transaction (sql.Tx). The returned statement
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@@ -197,7 +206,9 @@ Usage example:
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log.Fatal(err)
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}
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# Notifications
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Notifications
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PostgreSQL supports a simple publish/subscribe model over database
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connections. See http://www.postgresql.org/docs/current/static/sql-notify.html
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@@ -230,7 +241,9 @@ bytes by the PostgreSQL server.
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You can find a complete, working example of Listener usage at
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https://godoc.org/github.com/lib/pq/example/listen.
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# Kerberos Support
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Kerberos Support
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If you need support for Kerberos authentication, add the following to your main
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package:
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@@ -246,10 +259,10 @@ don't have to download unnecessary dependencies.
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When imported, additional connection string parameters are supported:
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- krbsrvname - GSS (Kerberos) service name when constructing the
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SPN (default is `postgres`). This will be combined with the host
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to form the full SPN: `krbsrvname/host`.
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- krbspn - GSS (Kerberos) SPN. This takes priority over
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`krbsrvname` if present.
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* krbsrvname - GSS (Kerberos) service name when constructing the
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SPN (default is `postgres`). This will be combined with the host
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to form the full SPN: `krbsrvname/host`.
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* krbspn - GSS (Kerberos) SPN. This takes priority over
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`krbsrvname` if present.
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*/
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package pq
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