Attribute

columnDiscoverySampleSize

Purpose

Specifies the number of rows the driver fetches per collection when sampling data to detect columns and gather column statistics. The information collected in these samples is used when defining a schema definition with the DataDirect Schema Tool. Larger fetch sizes return samples that are more representative of your data, but at the expense of slower performance.

Valid Values

x

where:

x
The number of rows the driver fetches per collection.

The value for this option is specified as a key=value pair in the Config Options field. See "Config options" for details.

Default

1000

GUI Tab

For Windows:

The value for config options are specified in the Config Options field on the Advanced tab.

For UNIX/Linux:

The value for config options are specified in the Config Options field on the Schema Tool. For details, see "Starting the Schema Tool on UNIX/Linux."

See also