Redshift

JDBC Redshift Source Connector

Description​

Read external data source data through JDBC.

Key features​

• batch

• exactly-once

• column projection

• parallelism

• support user-defined split

supports query SQL and can achieve projection effect.

Data Type Mapping​

Redshift Data type	Nexus Data type
SMALLINT INT2	SHORT
INTEGER INT INT4	INT
BIGINT INT8 OID	LONG
DECIMAL NUMERIC	DECIMAL((Get the designated column's specified column size)+1, (Gets the designated column's number of digits to right of the decimal point.)))
REAL FLOAT4	FLOAT
DOUBLE_PRECISION FLOAT8 FLOAT	DOUBLE
BOOLEAN BOOL	BOOLEAN
CHAR CHARACTER NCHAR BPCHAR VARCHAR CHARACTER_VARYING NVARCHAR TEXT SUPER	STRING
VARBYTE BINARY_VARYING	BYTES
TIME TIME_WITH_TIME_ZONE TIMETZ	LOCALTIME
TIMESTAMP TIMESTAMP_WITH_OUT_TIME_ZONE TIMESTAMPTZ	LOCALDATETIME

Example​

Simple:​

This example queries type_bin 'table' 16 data in your test "database" in single parallel and queries all of its fields. You can also specify which fields to query for final output to the console.

env {
  parallelism = 2
  job.mode = "BATCH"
}
source{
    Jdbc {
        url = "jdbc:redshift://localhost:5439/dev"
        driver = "com.amazon.redshift.jdbc.Driver"
        user = "root"
        password = "123456"
        
        table_path = "public.table2"
        # Use query filetr rows & columns
        query = "select id, name from public.table2 where id > 100"
        
        #split.size = 8096
        #split.even-distribution.factor.upper-bound = 100
        #split.even-distribution.factor.lower-bound = 0.05
        #split.sample-sharding.threshold = 1000
        #split.inverse-sampling.rate = 1000
    }
}

sink {
    Console {}
}

Multiple table read:​

Configuring table_list will turn on auto split, you can configure `split.` to adjust the split strategy*

env {
  job.mode = "BATCH"
  parallelism = 2
}
source {
  Jdbc {
    url = "jdbc:redshift://localhost:5439/dev"
    driver = "com.amazon.redshift.jdbc.Driver"
    user = "root"
    password = "123456"

    table_list = [
      {
        table_path = "public.table1"
      },
      {
        table_path = "public.table2"
        # Use query filetr rows & columns
        query = "select id, name from public.table2 where id > 100"
      }
    ]
    #split.size = 8096
    #split.even-distribution.factor.upper-bound = 100
    #split.even-distribution.factor.lower-bound = 0.05
    #split.sample-sharding.threshold = 1000
    #split.inverse-sampling.rate = 1000
  }
}

sink {
  Console {}
}