跳到主要内容
版本:2.3.4

DB2

JDBC DB2 Source Connector

Support Those Engines

Spark
Flink
SeaTunnel Zeta

Description

Read external data source data through JDBC.

Using Dependency

  1. You need to ensure that the jdbc driver jar package has been placed in directory ${SEATUNNEL_HOME}/plugins/.

For SeaTunnel Zeta Engine

  1. You need to ensure that the jdbc driver jar package has been placed in directory ${SEATUNNEL_HOME}/lib/.

Key Features

supports query SQL and can achieve projection effect.

Supported DataSource Info

DatasourceSupported versionsDriverUrlMaven
DB2Different dependency version has different driver class.com.ibm.db2.jdbc.app.DB2Driverjdbc:db2://127.0.0.1:50000/dbnameDownload

Database Dependency

Please download the support list corresponding to 'Maven' and copy it to the '$SEATNUNNEL_HOME/plugins/jdbc/lib/' working directory
For example DB2 datasource: cp db2-connector-java-xxx.jar $SEATNUNNEL_HOME/plugins/jdbc/lib/

Data Type Mapping

DB2 Data TypeSeaTunnel Data Type
BOOLEANBOOLEAN
SMALLINTSHORT
INT
INTEGER
INTEGER
BIGINTLONG
DECIMAL
DEC
NUMERIC
NUM
DECIMAL(38,18)
REALFLOAT
FLOAT
DOUBLE
DOUBLE PRECISION
DECFLOAT
DOUBLE
CHAR
VARCHAR
LONG VARCHAR
CLOB
GRAPHIC
VARGRAPHIC
LONG VARGRAPHIC
DBCLOB
STRING
BLOBBYTES
DATEDATE
TIMETIME
TIMESTAMPTIMESTAMP
ROWID
XML
Not supported yet

Source Options

NameTypeRequiredDefaultDescription
urlStringYes-The URL of the JDBC connection. Refer to a case: jdbc:db2://127.0.0.1:50000/dbname
driverStringYes-The jdbc class name used to connect to the remote data source,
if you use db2 the value is com.ibm.db2.jdbc.app.DB2Driver.
userStringNo-Connection instance user name
passwordStringNo-Connection instance password
queryStringYes-Query statement
connection_check_timeout_secIntNo30The time in seconds to wait for the database operation used to validate the connection to complete
partition_columnStringNo-The column name for parallelism's partition, only support numeric type,Only support numeric type primary key, and only can config one column.
partition_lower_boundBigDecimalNo-The partition_column min value for scan, if not set SeaTunnel will query database get min value.
partition_upper_boundBigDecimalNo-The partition_column max value for scan, if not set SeaTunnel will query database get max value.
partition_numIntNojob parallelismThe number of partition count, only support positive integer. default value is job parallelism
fetch_sizeIntNo0For queries that return a large number of objects,you can configure
the row fetch size used in the query toimprove performance by
reducing the number database hits required to satisfy the selection criteria.
Zero means use jdbc default value.
propertiesMapNo-Additional connection configuration parameters,when properties and URL have the same parameters, the priority is determined by the
specific implementation of the driver. For example, in MySQL, properties take precedence over the URL.
common-optionsNo-Source plugin common parameters, please refer to Source Common Options for details

Tips

If partition_column is not set, it will run in single concurrency, and if partition_column is set, it will be executed in parallel according to the concurrency of tasks.

Task 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.

# Defining the runtime environment
env {
parallelism = 2
job.mode = "BATCH"
}
source{
Jdbc {
url = "jdbc:db2://127.0.0.1:50000/dbname"
driver = "com.ibm.db2.jdbc.app.DB2Driver"
connection_check_timeout_sec = 100
user = "root"
password = "123456"
query = "select * from table_xxx"
}
}

transform {
# If you would like to get more information about how to configure seatunnel and see full list of transform plugins,
# please go to https://seatunnel.apache.org/docs/transform-v2/sql
}

sink {
Console {}
}

Parallel:

Read your query table in parallel with the shard field you configured and the shard data You can do this if you want to read the whole table

source {
Jdbc {
url = "jdbc:db2://127.0.0.1:50000/dbname"
driver = "com.ibm.db2.jdbc.app.DB2Driver"
connection_check_timeout_sec = 100
user = "root"
password = "123456"
# Define query logic as required
query = "select * from type_bin"
# Parallel sharding reads fields
partition_column = "id"
# Number of fragments
partition_num = 10
}
}

Parallel Boundary:

It is more efficient to specify the data within the upper and lower bounds of the query It is more efficient to read your data source according to the upper and lower boundaries you configured

source {
Jdbc {
url = "jdbc:db2://127.0.0.1:50000/dbname"
driver = "com.ibm.db2.jdbc.app.DB2Driver"
connection_check_timeout_sec = 100
user = "root"
password = "123456"
# Define query logic as required
query = "select * from type_bin"
partition_column = "id"
# Read start boundary
partition_lower_bound = 1
# Read end boundary
partition_upper_bound = 500
partition_num = 10
}
}