Solr JDBC - Python/Jython

2020-01-12

Solr’s JDBC driver supports Python and Jython.

Python

Python supports accessing JDBC using the JayDeBeApi library. The CLASSPATH variable must be configured to contain the solr-solrj jar and the supporting solrj-lib jars.

JayDeBeApi

run.sh
#!/usr/bin/env bash
# Java must already be installed

pip install JayDeBeApi

export CLASSPATH="$(echo $(ls /opt/solr/dist/solr-solrj* /opt/solr/dist/solrj-lib/*) | tr ' ' ':')"

python solr_jaydebeapi.py
solr_jaydebeapi.py
#!/usr/bin/env python

# https://pypi.python.org/pypi/JayDeBeApi/

import jaydebeapi
import sys
if __name__ == '__main__':
  jdbc_url = "jdbc:solr://localhost:9983?collection=test"
  driverName = "org.apache.solr.client.solrj.io.sql.DriverImpl"
  statement = "select fielda, fieldb, fieldc, fieldd_s, fielde_i from test limit 10"

  conn = jaydebeapi.connect(driverName, jdbc_url)
  curs = conn.cursor()
  curs.execute(statement)
  print(curs.fetchall())

  conn.close()

  sys.exit(0)

Jython

Jython supports accessing JDBC natively with Java interfaces or with the zxJDBC library. The CLASSPATH variable must be configured to contain the solr-solrj jar and the supporting solrj-lib jars.

run.sh
#!/usr/bin/env bash
# Java and Jython must already be installed

export CLASSPATH="$(echo $(ls /opt/solr/dist/solr-solrj* /opt/solr/dist/solrj-lib/*) | tr ' ' ':')"

jython [solr_java_native.py | solr_zxjdbc.py]

Java Native

solr_java_native.py
#!/usr/bin/env jython

# http://www.jython.org/jythonbook/en/1.0/DatabasesAndJython.html
# https://wiki.python.org/jython/DatabaseExamples#SQLite_using_JDBC

import sys

from java.lang import Class
from java.sql  import DriverManager, SQLException

if __name__ == '__main__':
  jdbc_url = "jdbc:solr://localhost:9983?collection=test"
  driverName = "org.apache.solr.client.solrj.io.sql.DriverImpl"
  statement = "select fielda, fieldb, fieldc, fieldd_s, fielde_i from test limit 10"

  dbConn = DriverManager.getConnection(jdbc_url)
  stmt = dbConn.createStatement()

  resultSet = stmt.executeQuery(statement)
  while resultSet.next():
    print(resultSet.getString("fielda"))

  resultSet.close()
  stmt.close()
  dbConn.close()

  sys.exit(0)

zxJDBC

solr_zxjdbc.py
#!/usr/bin/env jython

# http://www.jython.org/jythonbook/en/1.0/DatabasesAndJython.html
# https://wiki.python.org/jython/DatabaseExamples#SQLite_using_ziclix

import sys

from com.ziclix.python.sql import zxJDBC

if __name__ == '__main__':
  jdbc_url = "jdbc:solr://localhost:9983?collection=test"
  driverName = "org.apache.solr.client.solrj.io.sql.DriverImpl"
  statement = "select fielda, fieldb, fieldc, fieldd_s, fielde_i from test limit 10"

  with zxJDBC.connect(jdbc_url, None, None, driverName) as conn:
    with conn:
      with conn.cursor() as c:
        c.execute(statement)
        print(c.fetchall())

  sys.exit(0)