pyspark read from redshift
from pyspark.sql import SQLContext
sc = # existing SparkContext
sql_context = SQLContext(sc)
# Read data from a table
df = sql_context.read \
.format("com.databricks.spark.redshift") \
.option("url", "jdbc:redshift://redshifthost:5439/database?user=username&password=pass") \
.option("dbtable", "my_table") \
.option("tempdir", "s3n://path/for/temp/data") \
.load()