JDBC

JDBC sink connector

Description

Write data through jdbc. Support Batch mode and Streaming mode, support concurrent writing, support exactly-once semantics (using XA transaction guarantee).

Key Features

exactly-once

Use Xa transactions to ensure exactly-once. So only support exactly-once for the database which is support Xa transactions. You can set is_exactly_once=true to enable it.

cdc
support multiple table write

Options

Name

Type

Required

Default

url

String

Yes

driver

String

Yes

user

String

password

String

query

String

compatible_mode

String

database

String

table

String

primary_keys

Array

support_upsert_by_query_primary_key_exist

Boolean

false

connection_check_timeout_sec

Int

max_retries

Int

batch_size

Int

1000

is_exactly_once

Boolean

false

generate_sink_sql

Boolean

false

xa_data_source_class_name

String

max_commit_attempts

Int

transaction_timeout_sec

Int

-1

auto_commit

Boolean

true

field_ide

String

properties

Map

common-options

schema_save_mode

Enum

CREATE_SCHEMA_WHEN_NOT_EXIST

data_save_mode

Enum

APPEND_DATA

custom_sql

String

enable_upsert

Boolean

true

use_copy_statement

Boolean

false

create_index

Boolean

true

driver [string]

The jdbc class name used to connect to the remote data source, if you use MySQL the value is com.mysql.cj.jdbc.Driver.

user [string]

userName

password [string]

password

url [string]

The URL of the JDBC connection. Refer to a case: jdbc:postgresql://localhost/test

query [string]

Use this sql write upstream input datas to database. e.g INSERT ...

compatible_mode [string]

The compatible mode of database, required when the database supports multiple compatible modes. For example, when using OceanBase database, you need to set it to 'mysql' or 'oracle'.

Postgres 9.5 version or below,please set it to postgresLow to support cdc

database [string]

Use this database and table-name auto-generate sql and receive upstream input datas write to database.

This option is mutually exclusive with query and has a higher priority.

table [string]

Use database and this table-name auto-generate sql and receive upstream input datas write to database.

This option is mutually exclusive with query and has a higher priority.

The table parameter can fill in the name of an unwilling table, which will eventually be used as the table name of the creation table, and supports variables (${table_name}, ${schema_name}). Replacement rules: ${schema_name} will replace the SCHEMA name passed to the target side, and ${table_name} will replace the name of the table passed to the table at the target side.

mysql sink for example:

test${schema_name}${table_name}_test
sink_sinktable
ss_${table_name}

pgsql (Oracle Sqlserver ...) Sink for example:

${schema_name}.${table_name} _test
dbo.tt_${table_name} _sink
public.sink_table

Tip: If the target database has the concept of SCHEMA, the table parameter must be written as xxx.xxx

primary_keys [array]

This option is used to support operations such as insert, delete, and update when automatically generate sql.

support_upsert_by_query_primary_key_exist [boolean]

Choose to use INSERT sql, UPDATE sql to process update events(INSERT, UPDATE_AFTER) based on query primary key exists. This configuration is only used when database unsupported upsert syntax. Note: that this method has low performance

connection_check_timeout_sec [int]

The time in seconds to wait for the database operation used to validate the connection to complete.

max_retries[int]

The number of retries to submit failed (executeBatch)

batch_size[int]

For batch writing, when the number of buffered records reaches the number of batch_size or the time reaches checkpoint.interval , the data will be flushed into the database

is_exactly_once[boolean]

Whether to enable exactly-once semantics, which will use Xa transactions. If on, you need to set xa_data_source_class_name.

generate_sink_sql[boolean]

Generate sql statements based on the database table you want to write to

xa_data_source_class_name[string]

The xa data source class name of the database Driver, for example, mysql is com.mysql.cj.jdbc.MysqlXADataSource, and please refer to appendix for other data sources

max_commit_attempts[int]

The number of retries for transaction commit failures

transaction_timeout_sec[int]

The timeout after the transaction is opened, the default is -1 (never timeout). Note that setting the timeout may affect exactly-once semantics

auto_commit [boolean]

Automatic transaction commit is enabled by default

field_ide [String]

The field "field_ide" is used to identify whether the field needs to be converted to uppercase or lowercase when synchronizing from the source to the sink. "ORIGINAL" indicates no conversion is needed, "UPPERCASE" indicates conversion to uppercase, and "LOWERCASE" indicates conversion to lowercase.

properties

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 options

Sink plugin common parameters, please refer to Sink Common Options for details

schema_save_mode [Enum]

Before the synchronous task is turned on, different treatment schemes are selected for the existing surface structure of the target side. Option introduction： RECREATE_SCHEMA ：Will create when the table does not exist, delete and rebuild when the table is saved CREATE_SCHEMA_WHEN_NOT_EXIST ：Will Created when the table does not exist, skipped when the table is saved ERROR_WHEN_SCHEMA_NOT_EXIST ：Error will be reported when the table does not exist

data_save_mode [Enum]

Before the synchronous task is turned on, different processing schemes are selected for data existing data on the target side. Option introduction： DROP_DATA： Preserve database structure and delete data APPEND_DATA：Preserve database structure, preserve data CUSTOM_PROCESSING：User defined processing ERROR_WHEN_DATA_EXISTS：When there is data, an error is reported

custom_sql [String]

When data_save_mode selects CUSTOM_PROCESSING, you should fill in the CUSTOM_SQL parameter. This parameter usually fills in a SQL that can be executed. SQL will be executed before synchronization tasks.

enable_upsert [boolean]

Enable upsert by primary_keys exist, If the task has no key duplicate data, setting this parameter to false can speed up data import

use_copy_statement [boolean]

Use COPY ${table} FROM STDIN statement to import data. Only drivers with getCopyAPI() method connections are supported. e.g.: Postgresql driver org.postgresql.Driver.

NOTICE: MAP, ARRAY, ROW types are not supported.

create_index [boolean]

Create the index(contains primary key and any other indexes) or not when auto-create table. You can use this option to improve the performance of jdbc writes when migrating large tables.

Notice: Note that this will sacrifice read performance, so you'll need to manually create indexes after the table migration to improve read performance

tips

In the case of is_exactly_once = "true", Xa transactions are used. This requires database support, and some databases require some setup : 1 postgres needs to set max_prepared_transactions > 1 such as ALTER SYSTEM set max_prepared_transactions to 10. 2 mysql version need >= 8.0.29 and Non-root users need to grant XA_RECOVER_ADMIN permissions. such as grant XA_RECOVER_ADMIN on test_db.* to 'user1'@'%'. 3 mysql can try to add rewriteBatchedStatements=true parameter in url for better performance.

appendix

there are some reference value for params above.

datasource

driver

url

xa_data_source_class_name

maven

MySQL

com.mysql.cj.jdbc.Driver

jdbc:mysql://localhost:3306/test

com.mysql.cj.jdbc.MysqlXADataSource

https://mvnrepository.com/artifact/mysql/mysql-connector-java

PostgreSQL

org.postgresql.Driver

jdbc:postgresql://localhost:5432/postgres

org.postgresql.xa.PGXADataSource

https://mvnrepository.com/artifact/org.postgresql/postgresql

dm.jdbc.driver.DmDriver

jdbc:dm://localhost:5236

dm.jdbc.driver.DmdbXADataSource

https://mvnrepository.com/artifact/com.dameng/DmJdbcDriver18

Phoenix

org.apache.phoenix.queryserver.client.Driver

jdbc:phoenix:thin:url=http://localhost:8765;serialization=PROTOBUF

https://mvnrepository.com/artifact/com.aliyun.phoenix/ali-phoenix-shaded-thin-client

SQL Server

com.microsoft.sqlserver.jdbc.SQLServerDriver

jdbc:sqlserver://localhost:1433

com.microsoft.sqlserver.jdbc.SQLServerXADataSource

https://mvnrepository.com/artifact/com.microsoft.sqlserver/mssql-jdbc

Oracle

oracle.jdbc.OracleDriver

jdbc:oracle:thin:@localhost:1521/xepdb1

oracle.jdbc.xa.OracleXADataSource

https://mvnrepository.com/artifact/com.oracle.database.jdbc/ojdbc8

sqlite

org.sqlite.JDBC

jdbc:sqlite:test.db

https://mvnrepository.com/artifact/org.xerial/sqlite-jdbc

GBase8a

com.gbase.jdbc.Driver

jdbc:gbase://e2e_gbase8aDb:5258/test

https://www.gbase8.cn/wp-content/uploads/2020/10/gbase-connector-java-8.3.81.53-build55.5.7-bin_min_mix.jar

StarRocks

com.mysql.cj.jdbc.Driver

jdbc:mysql://localhost:3306/test

https://mvnrepository.com/artifact/mysql/mysql-connector-java

db2

com.ibm.db2.jcc.DB2Driver

jdbc:db2://localhost:50000/testdb

com.ibm.db2.jcc.DB2XADataSource

https://mvnrepository.com/artifact/com.ibm.db2.jcc/db2jcc/db2jcc4

saphana

com.sap.db.jdbc.Driver

jdbc:sap://localhost:39015

https://mvnrepository.com/artifact/com.sap.cloud.db.jdbc/ngdbc

Doris

com.mysql.cj.jdbc.Driver

jdbc:mysql://localhost:3306/test

https://mvnrepository.com/artifact/mysql/mysql-connector-java

teradata

com.teradata.jdbc.TeraDriver

jdbc:teradata://localhost/DBS_PORT=1025,DATABASE=test

https://mvnrepository.com/artifact/com.teradata.jdbc/terajdbc

Redshift

com.amazon.redshift.jdbc42.Driver

jdbc:redshift://localhost:5439/testdb

com.amazon.redshift.xa.RedshiftXADataSource

https://mvnrepository.com/artifact/com.amazon.redshift/redshift-jdbc42

Snowflake

net.snowflake.client.jdbc.SnowflakeDriver

jdbc:snowflake://<account_name>.snowflakecomputing.com

https://mvnrepository.com/artifact/net.snowflake/snowflake-jdbc

Vertica

com.vertica.jdbc.Driver

jdbc:vertica://localhost:5433

https://repo1.maven.org/maven2/com/vertica/jdbc/vertica-jdbc/12.0.3-0/vertica-jdbc-12.0.3-0.jar

Kingbase

com.kingbase8.Driver

jdbc:kingbase8://localhost:54321/db_test

https://repo1.maven.org/maven2/cn/com/kingbase/kingbase8/8.6.0/kingbase8-8.6.0.jar

OceanBase

com.oceanbase.jdbc.Driver

jdbc:oceanbase://localhost:2881

https://repo1.maven.org/maven2/com/oceanbase/oceanbase-client/2.4.3/oceanbase-client-2.4.3.jar

xugu

com.xugu.cloudjdbc.Driver

jdbc:xugu://localhost:5138

https://repo1.maven.org/maven2/com/xugudb/xugu-jdbc/12.2.0/xugu-jdbc-12.2.0.jar

InterSystems IRIS

com.intersystems.jdbc.IRISDriver

jdbc:IRIS://localhost:1972/%SYS

https://raw.githubusercontent.com/intersystems-community/iris-driver-distribution/main/JDBC/JDK18/intersystems-jdbc-3.8.4.jar

Example

Simple

jdbc {
    url = "jdbc:mysql://localhost:3306/test"
    driver = "com.mysql.cj.jdbc.Driver"
    user = "root"
    password = "123456"
    query = "insert into test_table(name,age) values(?,?)"
}

Exactly-once

Turn on exact one-time semantics by setting is_exactly_once

jdbc {

    url = "jdbc:mysql://localhost:3306/test"
    driver = "com.mysql.cj.jdbc.Driver"

    max_retries = 0
    user = "root"
    password = "123456"
    query = "insert into test_table(name,age) values(?,?)"

    is_exactly_once = "true"

    xa_data_source_class_name = "com.mysql.cj.jdbc.MysqlXADataSource"
}

CDC(Change data capture) event

jdbc receive CDC example

sink {
    jdbc {
        url = "jdbc:mysql://localhost:3306"
        driver = "com.mysql.cj.jdbc.Driver"
        user = "root"
        password = "123456"
        
        database = "sink_database"
        table = "sink_table"
        primary_keys = ["key1", "key2", ...]
    }
}

Add saveMode function

To facilitate the creation of tables when they do not already exist, set the schema_save_mode to CREATE_SCHEMA_WHEN_NOT_EXIST.

sink {
    jdbc {
        url = "jdbc:mysql://localhost:3306"
        driver = "com.mysql.cj.jdbc.Driver"
        user = "root"
        password = "123456"
        generate_sink_sql = "true"
        database = "sink_database"
        table = "sink_table"
        primary_keys = ["key1", "key2", ...]
        schema_save_mode = "CREATE_SCHEMA_WHEN_NOT_EXIST"
        data_save_mode="APPEND_DATA"
    }
}

Postgresql 9.5 version below support CDC(Change data capture) event

For PostgreSQL versions 9.5 and below, setting compatible_mode to postgresLow to enable support for PostgreSQL Change Data Capture (CDC) operations.

sink {
    jdbc {
        url = "jdbc:postgresql://localhost:5432"
        driver = "org.postgresql.Driver"
        user = "root"
        password = "123456"
        compatible_mode="postgresLow"
        database = "sink_database"
        table = "sink_table"
        support_upsert_by_query_primary_key_exist = true
        generate_sink_sql = true
        primary_keys = ["key1", "key2", ...]
    }
}

Multiple table

example1

env {
  parallelism = 1
  job.mode = "STREAMING"
  checkpoint.interval = 5000
}

source {
  Mysql-CDC {
    base-url = "jdbc:mysql://127.0.0.1:3306/nexus"
    username = "root"
    password = "******"
    
    table-names = ["nexus.role","nexus.user","galileo.Bucket"]
  }
}

transform {
}

sink {
  jdbc {
    url = "jdbc:mysql://localhost:3306"
    driver = "com.mysql.cj.jdbc.Driver"
    user = "root"
    password = "123456"
    generate_sink_sql = true
    
    database = "${database_name}_test"
    table = "${table_name}_test"
    primary_keys = ["${primary_key}"]
  }
}

example2

env {
  parallelism = 1
  job.mode = "BATCH"
}

source {
  Jdbc {
    driver = oracle.jdbc.driver.OracleDriver
    url = "jdbc:oracle:thin:@localhost:1521/XE"
    user = testUser
    password = testPassword

    table_list = [
      {
        table_path = "TESTSCHEMA.TABLE_1"
      },
      {
        table_path = "TESTSCHEMA.TABLE_2"
      }
    ]
  }
}

transform {
}

sink {
  jdbc {
    url = "jdbc:mysql://localhost:3306"
    driver = "com.mysql.cj.jdbc.Driver"
    user = "root"
    password = "123456"
    generate_sink_sql = true

    database = "${schema_name}_test"
    table = "${table_name}_test"
    primary_keys = ["${primary_key}"]
  }
}

PreviousIoTDB NextKafka

Last updated 9 months ago

Description​

Key Features​

Options​

driver [string]​

user [string]​

password [string]​

url [string]​

query [string]​

compatible_mode [string]​

database [string]​

table [string]​

primary_keys [array]​

support_upsert_by_query_primary_key_exist [boolean]​

connection_check_timeout_sec [int]​

max_retries[int]​

batch_size[int]​

is_exactly_once[boolean]​

generate_sink_sql[boolean]​

xa_data_source_class_name[string]​

max_commit_attempts[int]​

transaction_timeout_sec[int]​

auto_commit [boolean]​

field_ide [String]​

properties​

common options​

schema_save_mode [Enum]​

data_save_mode [Enum]​

custom_sql [String]​

enable_upsert [boolean]​

use_copy_statement [boolean]​

create_index [boolean]​

tips​

appendix​

Example​

Multiple table​

Description

Key Features

Options

driver [string]

user [string]

password [string]

url [string]

query [string]

compatible_mode [string]

database [string]

table [string]

primary_keys [array]

support_upsert_by_query_primary_key_exist [boolean]

connection_check_timeout_sec [int]

max_retries[int]

batch_size[int]

is_exactly_once[boolean]

generate_sink_sql[boolean]

xa_data_source_class_name[string]

max_commit_attempts[int]

transaction_timeout_sec[int]

auto_commit [boolean]

field_ide [String]

properties

common options

schema_save_mode [Enum]

data_save_mode [Enum]

custom_sql [String]

enable_upsert [boolean]

use_copy_statement [boolean]

create_index [boolean]

tips

appendix

Example

Multiple table