JDBC Driver for Apache Impala

Build 20.0.7654

Connection String Options

The connection string properties are the various options that can be used to establish a connection. This section provides a complete list of the options you can configure in the connection string for this provider. Click the links for further details.

For more information on establishing a connection, see Establishing a Connection.
Auth SchemeThe authentication scheme used. Accepted entries are NoSasl, LDAP and Kerberos.
Auto CacheAutomatically caches the results of SELECT queries into a cache database specified by either CacheLocation or both of CacheConnection and CacheProvider .
Batch SizeThe maximum size of each batch operation to submit.
Cache ConnectionThe connection string for the cache database. This property is always used in conjunction with CacheProvider . Setting both properties will override the value set for CacheLocation for caching data.
Cache DriverThe database driver to be used to cache data.
Cache LocationSpecifies the path to the cache when caching to a file.
Cache MetadataThis property determines whether or not to cache the table metadata to a file store.
Cache ToleranceThe tolerance for stale data in the cache specified in seconds when using AutoCache .
Connection Life TimeThe maximum lifetime of a connection in seconds. Once the time has elapsed, the connection object is disposed.
Connect On OpenThis property species whether to connect to the Apache Impala when the connection is opened.
DatabaseThe name of the Impala database to use by default.
Kerberos KDCThe Kerberos Key Distribution Center (KDC) service used to authenticate the user.
Kerberos Keytab FileThe Keytab file containing your pairs of Kerberos principals and encrypted keys.
Kerberos RealmThe Kerberos Realm used to authenticate the user with.
Kerberos SPNThe service principal name (SPN) for the Kerberos Domain Controller.
LocationA path to the directory that contains the schema files defining tables, views, and stored procedures.
LogfileA filepath which designates the name and location of the log file.
Log ModulesCore modules to be included in the log file.
Max Log File CountA string specifying the maximum file count of log files. When the limit is hit, a new log is created in the same folder with the date and time appended to the end and the oldest log file will be deleted.
Max Log File SizeA string specifying the maximum size in bytes for a log file (for example, 10 MB). When the limit is hit, a new log is created in the same folder with the date and time appended to the end.
Max RowsLimits the number of rows returned rows when no aggregation or group by is used in the query. This helps avoid performance issues at design time.
OfflineUse offline mode to get the data from the cache instead of the live source.
OtherThese hidden properties are used only in specific use cases.
PagesizeThe maximum number of results to return per page from Apache Impala.
PasswordThe password used to authenticate with Impala.
Pool Idle TimeoutThe allowed idle time for a connection before it is closed.
Pool Max SizeThe maximum connections in the pool.
Pool Min SizeThe minimum number of connections in the pool.
Pool Wait TimeThe max seconds to wait for an available connection.
PortThe port for the connection to the Impala Server instance.
Protocol VersionThe Thrift protocol version to use when connecting to the Impala server.
Pseudo ColumnsThis property indicates whether or not to include pseudo columns as columns to the table.
Query PassthroughThis option passes the query to the Apache Impala server as is.
ReadonlyYou can use this property to enforce read-only access to Apache Impala from the provider.
RTKThe runtime key used for licensing.
ServerThe name of the server running SQL Server.
Support Enhanced SQLThis property enhances SQL functionality beyond what can be supported through the API directly, by enabling in-memory client-side processing.
TablesThis property restricts the tables reported to a subset of the available tables. For example, Tables=TableA,TableB,TableC.
Use Connection PoolingThis property enables connection pooling.
UserThe username used to authenticate with Impala.
VerbosityThe verbosity level that determines the amount of detail included in the log file.
ViewsRestricts the views reported to a subset of the available tables. For example, Views=ViewA,ViewB,ViewC.

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Build 20.0.7654