H2 Connector (legacy)
KNIME connectors to common databases version 4.3.0.v202011191336 by KNIME AG, Zurich, Switzerland
This node is part of the legacy database framework. For more information on how to migrate to the new database framework see the migration section of the database documentation.
This node creates a connection to a H2 database file via its JDBC driver. You need to provide the path to the file. No username and password are required for H2 databases.
Note that H2 converts all column names to uppercase therefore we quote them so that their case is retained. This means that if you are writing your own SQL code (e.g. in the Database Table Selector) you have to quote column names, too (using double quotes).
Options
- Path
- The path to the H2 database file.
- Timezone correction
- Select the TimeZone to convert the date, time or timestamp field
into. The current implementation can't
represent time zones. In order
to support persisting those fields into a
database, the time values
can be
changed according to the selected time zone, which is used as
the offset
(including the daylight saving
time)
for the original values:
- No correction (use UTC) is used for workflows (created before 2.8) and doesn't apply any correction,
- Use local timezone uses the local time zone offset to correct the date field before reading or writing, and
- Use selected timezone allows selecting the time zone to covert the date values into.
- Allow spaces in column names
- Check this option if the database can handle spaces in column names. Otherwise KNIME will replaces them by underscores.
- Validate connection on close
- Check this option if you want to validate the connection when closing the dialog.
- Retrieve metadata in configure
- This option controls subsequent nodes. Usually when a database node is configured it retrieves the metadata of the current table or query from the database for usage in subsequent nodes. If metadata retrieval takes quite some time it will slow down workflow configuration and execution noticeably, especially since metadata is retrieved in both configure and execute. In such cases it's better to switch this option off and only retrieve metadata during execute.
Output Ports
Best Friends (Incoming)
- String Input (36 %)
Table Row to Variable(21 %) Deprecated- Create Temp Dir (legacy) (14 %)
- String Manipulation (Variable) (7 %)
- URL to File Path (Variable) (7 %)
- Show all 7 recommendations
Best Friends (Outgoing)
- Database Connection Table Reader (legacy) (15 %)
- Database Table Creator (legacy) (14 %)
- Database Writer (legacy) (13 %) Streamable
- Database Table Selector (legacy) (13 %)
- Database Column Filter (legacy) (9 %)
- Show all 19 recommendations
Workflows
3.Deployment (KNIME Hub) - 3.Deployment - solution (KNIME Hub)
Installation
To use this node in KNIME, install KNIME Connectors for Common Databases from the following update site:
A zipped version of the software site can be downloaded here.
You don't know what to do with this link? Read our NodePit Product and Node Installation Guide that explains you in detail how to install nodes to your KNIME Analytics Platform.
Developers
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