LUCIDDB JDBC DRIVER

The challenge is that in JDBC 4, some existing java. For now, the dummies are just empty interfaces; if we actually want to start implementing some of JDBC 4, we can copy the necessary declarations from java. Plugin jars are self-installing via deployment descriptors. I could not find mention of JDBC 4. Retrieved from ” http: Allows new foreign data wrappers e. We would like to have a transition period during which both JDK’s are supported.

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The challenge is that in JDBC 4, some existing java.

However, bugs like this http: But for JDK 1. I could not find mention of JDBC 4. The rationale is that jdbcc would like to be able to support connectivity from as many applications as possible, even older ones stuck on legacy JVM’s.

This is by no means exhaustive or ironclad:. FRG describes a known issue running on 1.

Jdbc4Transition

The next section documents the approach we are actually planning to take. Plugin jars are self-installing via deployment descriptors. Allows report execution to sync to a particular global database state such as last successful ETL so that queries never see intermediate inconsistent states; enables trickle-feed ETL, and may be used to eliminate the downtime imposition of an ETL window.

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There have been various attacks on this see Mailing List Discussions.

Allows the system to be backed up consistently while queries and ETL are running, eliminating downtime; incremental and compression options minimize archival storage and bandwidth. When we compile under 1.

jdbc-luciddb

No mention of 1. Views Page Discussion View source History. Allows new foreign data wrappers e. If we omit the new methods, then our code remains incompatible with JDK 1.

File: README — Documentation for jdbc-luciddb ()

The SQLServer download page http: Support for JDBC4 methods is limited. Pentaho Data Integration step. Now, when we compile under 1. Retrieved from ” http: I grepped around in the 1. The general policy for Lucidxb is to segregate client driver dependencies enforced via macker so that these can be compiled to target older JVM’s.

Can scale to number-crunch even the largest datasets in limited RAM via skew-resistant disk-based partitioning.

JDBC Drivers Reference – Pentaho Documentation

The jTDS driver http: Older versions of postgres appear to use the dynamic proxy approach. High performance and greater cache and disk effectiveness because LucidDB can almost always predict exactly which disk blocks are needed to satisfy a query.

This means that if we start implementing any of the new JDBC 4 functionality, we’ll need to either compile multiple client driver versions, or figure out how to make a one-size-fits-all client, maybe using the olap4j factory technique described by Julian.

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Allows LucidDB to connect to heterogeneous external data sources via foreign data wrappers and access their content as foreign tables. The driver builds, but the majority of new methods are stubbed out.

Allows new functions and transformations to be developed in Java and hot-plugged into a running LucidDB instance; LucidDB also comes with a companion library of common ETL functions applib. We would like to have a transition period during which both JDK’s are supported. Tables can be loaded directly from external sources via SQL; no separate bulk loader utility is required for performance, loads are never logged at the row-level, yet are fully recoverable via page-level undo ; the Luciddn Otherwise, attempting to compile FarragoJdbcEnginePreparedStatement will result in an import ambiguity error.

For now, the dummies are just empty interfaces; if we actually want to start implementing some of JDBC 4, we can copy the necessary declarations from java.