Apache Solr Reference Guide Covering Apache Solr 6.0

expr=search(collection1,
zkHost="localhost:9983",
qt="/export",
q="*:*",
fl="id,a_s,a_i,a_f",
sort="a_f asc, a_i asc")
jdbc
The jdbc function searches a JDBC datasource and emits a stream of tuples representing the JDBC result set.
Each row in the result set is translated into a Tuple and each Tuple contains all the cell values for that row.
Parameters
connection: (Mandatory) JDBC formatted connection string to whatever driver you are using.
sql: (Mandatory) query to pass off to the JDBC endpoint
sort: (Mandatory) The sort criteria indicating how the data coming out of the JDBC stream is sorted
driver: The name of the JDBC driver used for the connection. If provided then the driver class will
attempt to be loaded into the JVM. If not provided then it is assumed that the driver is already loaded into
the JVM. Some drivers require explicit loading so this option is provided.
[driverProperty]: One or more properties to pass to the JDBC driver during connection. The format is
propertyName="propertyValue". You can provide as many of these properties as you'd like and
they will all be passed to the connection.
Connections and Drivers
Because some JDBC drivers require explicit loading the driver parameter can be used to provide the driver
class name. If provided, then during stream construction the driver will be loaded. If the driver cannot be loaded
because the class is not found on the classpath, then stream construction will fail.
When the JDBC stream is opened it will validate that a driver can be found for the provided connection string. If a
driver cannot be found (because it hasn't been loaded) then the open will fail.
Datatypes
Due to the inherent differences in datatypes across JDBC sources the following datatypes are supported. The
table indicates what Java type will be used for a given JDBC type. Types marked as requiring conversion will go
through a conversion for each value of that type. For performance reasons the cell data types are only
considered when the stream is opened as this is when the converters are created.
JDBC Type Java Type Requires Conversion
String String No
Short Long Yes
Integer Long Yes
Long Long No
Float Double Yes
Double Double No
Boolean Boolean No
Apache Solr Reference Guide 6.0
409