testConnection
Syntax
Description
tests the PostgreSQL native interface database connection specified by the status
= testConnection(opts
,username
,password
)SQLConnectionOptions
object opts
, a user name, and a
password.
Examples
Create, configure, test, and save a PostgreSQL native interface data source for a PostgreSQL database.
Create a PostgreSQL native interface data source for a PostgreSQL native interface database connection.
vendor = "PostgreSQL"; opts = databaseConnectionOptions("native",vendor)
opts = SQLConnectionOptions with properties: DataSourceName: "" Vendor: "PostgreSQL" DatabaseName: "" Server: "localhost" PortNumber: 5432
opts
is an SQLConnectionOptions
object with these properties:
DataSourceName
— Name of the data sourceVendor
— Database vendor nameDatabaseName
— Name of the databaseServer
— Name of the database serverPortNumber
— Port number
Configure the data source by setting the database connection options for the data source PostgreSQLDataSource
, database name toystore_doc
, database server dbtb00
, and port number 5432
.
opts = setoptions(opts, ... 'DataSourceName',"PostgreSQLDataSource", ... 'DatabaseName',"toystore_doc",'Server',"dbtb00", ... 'PortNumber',5432)
opts = SQLConnectionOptions with properties: DataSourceName: "PostgreSQLDataSource" Vendor: "PostgreSQL" DatabaseName: "toystore_doc" Server: "dbtb00" PortNumber: 5432
The setoptions
function sets the DataSourceName
, DatabaseName
, Server
, and PortNumber
properties in the SQLConnectionOptions
object.
Test the database connection with a user name and password. The testConnection
function returns the logical 1
, which indicates the database connection is successful.
username = "dbdev"; password = "matlab"; status = testConnection(opts,username,password)
status = logical
1
Save the configured data source.
saveAsDataSource(opts)
You can connect to the new data source using the postgresql
function or the Database Explorer app.
Create and configure a PostgreSQL native interface data source to a PostgreSQL database. Test the database connection to the PostgreSQL native interface data source and retrieve the error message.
Create a PostgreSQL native interface data source for a PostgreSQL database connection.
vendor = "PostgreSQL"; opts = databaseConnectionOptions("native",vendor)
opts = SQLConnectionOptions with properties: DataSourceName: "" Vendor: "PostgreSQL" DatabaseName: "" Server: "localhost" PortNumber: 5432
opts
is an SQLConnectionOptions
object with
these properties:
DataSourceName
— Name of the data sourceVendor
— Database vendor nameDatabaseName
— Name of the databaseServer
— Name of the database serverPortNumber
— Port number
Configure the data source by setting the database connection options for the data
source PostgreSQLDataSource
, database name
toystore_doc
, database server dbtb00
, and port
number 5432
.
opts = setoptions(opts, ... 'DataSourceName',"PostgreSQLDataSource", ... 'DatabaseName',"toystore_doc",'Server',"dbtb00", ... 'PortNumber',5432)
opts = SQLConnectionOptions with properties: DataSourceName: "PostgreSQLDataSource" Vendor: "PostgreSQL" DatabaseName: "toystore_doc" Server: "dbtb00" PortNumber: 5432
The setoptions
function sets the
DataSourceName
, DatabaseName
,
Server
, and PortNumber
properties in the
SQLConnectionOptions
object.
Test the database connection using an incorrect user name and password. The
testConnection
function returns the logical 0
,
which indicates the database connection fails. Retrieve and display the error message
for the failed connection.
username = "wronguser"; password = "wrongpassword"; [status,message] = testConnection(opts,username,password)
status = logical
0
message =
'Driver Error: FATAL: password authentication failed for user "wronguser"
FATAL: password authentication failed for user "wronguser"
'
Input Arguments
Database connection options, specified as an SQLConnectionOptions
object.
Username required to access the database, specified as a character
vector or string scalar. If no username is required, specify an
empty value ""
. Provide this username if you
do not store it as part of the data source when using the
Database Explorer app to make a connection.
Password required to access the database, specified as a character vector or string scalar. If
no password is required, specify an empty value
""
. Provide this password if you
do not store it as part of the data source when using the
Database Explorer app to make a connection.
Data Types: char
| string
Output Arguments
Connection status, returned as a logical true
if the connection
test passes or false
if the connection test fails.
Error message, returned as a character vector. If the connection test passes, then the error message is an empty character vector. Otherwise, the error message contains text describing the failed database connection.
Version History
Introduced in R2020b
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