Advanced Tab

The following table and the sections below lists and explains the connection properties that are in the Advanced Tab of the New Data Source Window.

Connection URL Pattern	A template for generating a URL to connect to the physical data source.
Connection URL String	The URL string generated from the connection URL pattern with the connection information you provide.
JDBC Connection Properties	Lets you specify property-value pairs to pass to the JDBC data source
Connection Pool Maximum Size	Maximum number of connections (both active and idle) allowed for the data source. When the maximum is reached, new requests must wait until a connection is available.
Connection Pool Minimum Size	Minimum number of connections in the pool even when the pool is inactive.
Connection Pool Idle Timeout	Number of seconds that a connection can remain idle without being dropped from the pool when there are more than the minimum number of connections.
Maximum Connection Lifetime	The number of minutes that a connection that was returned to the pool persists if there are more open connections than the minimum pool size.
Connection Validation Query	A data-source-specific query that the TDV query engine sends to see if the data source connection is valid. This query is executed every time a connection is checked out from the pool. Enter a query that returns quickly.
Execution Timeout	The number of seconds an execution query on the data source can run before being canceled.
Execute SELECTs Independently	Lets a SELECT statement be executed using a new connection from the connection pool, and committed immediately after completion. INSERT, UPDATE, and DELETE statements are executed using the same connection as part of the transaction.
Connection Checkout Procedure	A procedure that returns a valid SQL statement that can be used to initialize the connection.
Supports Star Schema	Check only if this data source supports very large predicates and very large cardinalities for star schema semijoins.
Max Source Side Cardinality for Semi Join	See the documentation for semijoins and the TDV Administration Guide for more information.
Min Target to Source Ratio for Semi Join	Sets the minimum target-to-source ratio of cardinality for semijoins. Refer to the TDV Administration Guide for more information.
Max Source Side of Semi Join To Use OR Syntax	See the documentation for semijoins and the TDV Administration Guide for more information.
Enable Native Data Loading	Lets the data source use its proprietary functionality to optimize performance.
Collation Sensitive	TDV does not use the SORT MERGE join algorithm if any data source involved in the join is marked Collation Sensitive.
Concurrent Request Limit	Works with the Massively Parallel Processing engine configuration parameters to control the amount of parallelization for the queries for a particular data source.
Is dataship source	Indicates whether the physical data source might be used as a source of shipped tables to another data ship enabled data source
Is dataship target	Indicates whether the physical data source might be used to receive shipped tables from another data ship enabled data source.
Lower bound/Upper bound for dataship	TDV uses Explain Plan to arrive at a numeric estimate of the cost of shipping data from a node to the Data Virtualizer. When the cost of shipping a federated query node falls between the limits of the Lowerbound and Upperbound, it is considered eligible for shipment so that it can be processed locally.
Schema Path for Temp Tables	A relative path to set the location of the temp tables on the data source. It is the name of a schema in the data source.
Temp Table Prefix	A character string addition to temporary table names so that they are recognized if they are needed.
Enable Bulk Import/Exportd	Setting this option indicates that you want to use Vertica’s Bulk Load utility to speed up your query times. For a given query, cardinality information is used to decide whether to use Bulk Load or JDBC default loading.
Enable Export To Another Vertica Database	When set, allows data to be exported to another Vertica database. You need to name each database that is available to accept the exported data. TDV uses the CONNECT and EXPORT commands to establish the connections between the data ship source and the data ship target.
Exported Database	Name of the Vertica database to which you want to export data.
Path of data source	The TDV full pathname to the other Vertica data source. For example: /shared/vertica

Connection URL Pattern

A template for generating a URL to connect to the physical data source.

Data Type

string

Default Value

jdbc:<DATA SOURCE>//<HOST>:<PORT>/<DATABASE_NAME>

Remarks

TDV does not validate modifications at the time of configuration. The data source adapter might not validate changes.

Connection URL String

The URL string generated from the connection URL pattern with the connection information you provide.

Data Type

string

Default Value

“”

Remarks

This string is used by the JDBC adapter to connect to the physical data source. This field cannot be edited. For details, see the section “Connecting through JDBC Adapters” in the TDV Administration Guide.

JDBC Connection Properties

Lets you specify property-value pairs to pass to the JDBC data source.

Data Type

string

Default Value

“”

Remarks

Click to add custom connection properties for any JDBC data source. Commonly used properties are populated with default values. Use the Add Argument button to specify other properties and values.

TDV does not validate property names. Some data source adapters ignore invalid property names or values; others return an error.

The driver properties specify connection timeout settings required by specific drivers. To avoid leaving connections open indefinitely, specify properties explicitly for your data source.

Connection Pool Maximum Size

Maximum number of connections (both active and idle) allowed for the data source. When the maximum is reached, new requests must wait until a connection is available.

Data Type

Numeric

Default Value

100

Remarks

If the maximum number of connections is in use when a request comes in (even with pass-through authentication), the new request is blocked and queued until a connection is available or the Connection Pool Idle Timeout is reached.

If no connection was made available within the specified timeout, a check is made for an available connection by the same user. If none is available, the least recently used connection for another user is dropped and a new connection is opened.

Studio reuses pooled connections if they continue to be valid after changes (such as connection name), but JDBC requests are forced to use new connections if any part of the data source connection configuration has changed.

Connection Pool Minimum Size

Minimum number of connections in the pool even when the pool is inactive.

Data Type

Numeric

Default Value

Remarks

When a connection has been idle, a validation query is used to verify whether an open connection is still valid just prior to submission of a request. If the connection is invalid, the connection is discarded and another is used.

Connection Pool Idle Timeout

Number of seconds that a connection can remain idle without being dropped from the pool when there are more than the minimum number of connections.

Data Type

Numeric

Default Value

Maximum Connection Lifetime

The number of minutes that a connection that was returned to the pool persists if there are more open connections than the minimum pool size.

Data Type

Numeric

Default Value

Remarks

The duration is calculated from connection creation. Default value is 60 minutes. Set a smaller value if the pool is likely to run out of connections. Be sure to add a validation query. Set a larger value if you want the connections to be held for a longer period. Set a value of 0 to keep connections alive indefinitely.

Connection Validation Query

A data-source-specific query that the TDV query engine sends to see if the data source connection is valid. This query is executed every time a connection is checked out from the pool. Enter a query that returns quickly.

Data Type

string

Default Value

Remarks

If this query returns a non-error result, the data source connection is considered valid. If this query fails, the connection is discarded and a new connection is checked out from the available pool.

No one SELECT statement works with all data sources. To verify that TDV is running and that it can connect to the data source, devise a query against a published table from that data source.

Enable Native Data Loading

Lets the data source use its proprietary functionality to optimize performance.

Data Type

Bool

Default Value

True

Remarks

See the User Guide, Chapter About Data Source Native Load Performance Options” for more details,.

Collation Sensitive

TDV does not use the SORT MERGE join algorithm if any data source involved in the join is marked Collation Sensitive.

Data Type

Bool

Default Value

False

Remarks

None

Concurrent Request Limit

Works with the Massively Parallel Processing engine configuration parameters to control the amount of parallelization for the queries for a particular data source.

Data Type

Numeric

Default Value

Remarks

None

Is dataship source

Indicates whether the physical data source might be used as a source of shipped tables to another data ship enabled data source.

Data Type

Bool

Default Value

False

Remarks

None

Is dataship target

Indicates whether the physical data source might be used to receive shipped tables from another data ship enabled data source.

Data Type

Bool

Default Value

False

Remarks

To make changes in this field, Is dataship source must be enabled.

Lower bound/Upper bound for dataship

TDV uses Explain Plan to arrive at a numeric estimate of the cost of shipping data from a node to the Data Virtualizer. When the cost of shipping a federated query node falls between the limits of the Lowerbound and Upperbound, it is considered eligible for shipment so that it can be processed locally.

Data Type

Numeric

Default Value

Lower bound - 50000

Upper bound - 5000000

Remarks

To make changes in this field, Is dataship source must be enabled.

Schema Path for Temp Tables

A relative path to set the location of the temp tables on the data source. It is the name of a schema in the data source.

Data Type

String

Default Value

Remarks

To make changes in this field, Is dataship target must be enabled.

Temp Table Prefix

A character string addition to temporary table names so that they are recognized if they are needed.

Data Type

String

Default Value

Remarks

To make changes in this field, Is dataship target must be enabled.

Enable Bulk Import/Export

Setting this option indicates that you want to use Vertica’s Bulk Load utility to speed up your query times. For a given query, cardinality information is used to decide whether to use Bulk Load or JDBC default loading.

Data Type

Bool

Default Value

True

Remarks

To make changes in this field, Is dataship target must be enabled.

Enable Export To Another Vertica Database

When set, allows data to be exported to another Vertica database. You need to name each database that is available to accept the exported data. TDV uses the CONNECT and EXPORT commands to establish the connections between the data ship source and the data ship target.

Data Type

Bool

Default Value

False

Remarks

To make changes in this field, Is dataship target must be enabled.

Execution Timeout

The number of seconds an execution query on the data source can run before being canceled.

Data Type

Numeric

Default Value

Remarks

None

Execute SELECTs Independently

Lets a SELECT statement be executed using a new connection from the connection pool, and committed immediately after completion. INSERT and UPDATE statements are executed using the same connection as part of the transaction.

Data Type

Bool

Default Value

True

Remarks

None

Connection Checkout Procedure

A procedure that returns a valid SQL statement that can be used to initialize the connection.

Data Type

string

Default Value

Remarks

The signature of the initialization procedure should be:

(IN ds_name VARCHAR, OUT sqlText VARCHAR)

Give the full path to the procedure in the Connection Check-out Procedure box.

Max Source Side Cardinality for Semi Join

See the documentation for semijoins and the TDV Administration Guide for more information.

Data Type

Numeric

Default Value

Remarks

None

Max Source Side of Semi Join To Use OR Syntax

See the documentation for semijoins and the TDV Administration Guide for more information.

Data Type

Numeric

Default Value

2147483647

Remarks

None

Min Target to Source Ratio for Semi Join

Sets a minimum ratio to trigger use of semi join optimization.

Data Type

Numeric

Default Value

Remarks

None

Supports Star Schema

Check only if this data source supports very large predicates and very large cardinalities for star schema semijoins.

Data Type

Bool

Default Value

False

Remarks

Refer to the section Star Schema Semijoin in the User Guide, for more information.

Exported Database

Name of the Vertica database to which you want to export data.

Data Type

String

Default Value

Remarks

None