JDBC Producer
The JDBC Producer destination uses a JDBC connection to write data to a database table. You can also use the JDBC Producer destination to write change capture data from a Microsoft SQL Server change log. For information about supported versions, see Supported Systems and Versions in the Data Collector documentation.
When you configure JDBC Producer, you specify connection information, table name, and optionally define field mappings.
By default, JDBC Producer writes data to the table based on the matching field names. You can override the default field mappings by defining specific mappings. To determine which table rows to update or delete, the destination detects the list of primary key columns for the table, and then uses the fields mapped to those columns to match rows.
You can configure the stage to rollback an entire batch if an error occurs while writing part of the batch. You can also configure custom properties that your driver requires.
The JDBC Producer can use CRUD operations defined in the
sdc.operation.type record header attribute to write
data. You can define a default operation for records without the header
attribute or value. You can also configure whether to use multi-row
operations for inserts and deletes, and how to handle records with
unsupported operations.
You can specify the format of the change data capture log used to process data from a CDC-enabled origin. For information about Data Collector change data processing and a list of CDC-enabled origins, see Processing Changed Data.
To use a JDBC version older than 4.0, you can specify the driver class name and define a health check query.
You can also use a connection to configure the destination.
You can use the JDBC Producer as part of the Drift Synchronization Solution for PostgreSQL.
Database Vendors and Drivers
The JDBC Producer destination can write data to multiple database vendors.
| Database Vendor | Supported Versions | Tested Versions |
|---|---|---|
| MySQL | MySQL 5.7 and later |
|
| Oracle |
Also supported:
|
|
| PostgreSQL | PostgreSQL 9.x and later |
|
| Microsoft SQL Server |
|
|
Installing the JDBC Driver
For information about installing additional drivers, see Install External Libraries in the Data Collector documentation.
CRUD Operation Processing
The JDBC Producer destination can insert, update, or delete data. The destination writes the records based on the CRUD operation defined in a CRUD operation header attribute or in operation-related stage properties.
- CRUD operation header attribute
- The destination
looks for the CRUD operation in the
sdc.operation.typerecord header attribute. - Operation stage properties
- If there is no CRUD operation in the
sdc.operation.typerecord header attribute, the destination uses the operation configured in the Default Operation property.
Update and Delete Operations
For update and delete operations, the JDBC Producer destination automatically detects the primary key of the table and uses that key in the WHERE clause that updates or deletes rows. The destination supports compound primary keys, keys that consist of more than one column.
customer, the
id column is the primary key:| id | first | middle | last |
|---|---|---|---|
| 1 | john | f | smith |
| 2 | john | m | doe |
| 3 | mary | jane | smith |
{
"id": 1,
"first": "john",
"middle": "m",
"last": "doe"
}DELETE FROM customer WHERE id = 1Note that the destination matches the row based on the primary key and not the other fields in the record.
Single and Multi-row Operations
JDBC Producer performs single-row operations by default. That is, it executes a SQL statement for each record. When supported by the destination database, you can configure JDBC Producer to perform multi-row operations. Depending on the sequence of the data, multi-row operations can improve pipeline performance.
When performing multi-row operations, JDBC Producer creates a single SQL statement for sequential insert rows and for sequential delete rows. JDBC Producer does not perform multi-row update operations. You can configure the Statement Parameter Limit property to limit the number of parameters in an insert operation - that is, you can limit the number of records included in an insert statement.
For example, say the pipeline generates three insert records, followed by two update records, and four delete records. If you enable multi-row operations and do not set a statement parameter limit, JDBC Producer generates a single insert SQL statement for the three insert records, two update statements - one for each of the update records, and a single delete statement for the four delete records. On the other hand, if you enable multi-row operations and set the statement parameter limit to two, JDBC Producer generates two insert SQL statements - one for two insert records and one for the third insert record, two update statements - one for each of the update records, and a single delete statement for the four delete records.
Error handling for multi-row operations depends on the database. If the database reports the individual record that causes an error in a multi-row statement, the stage sends that record to the error stream. If the database does not report which record causes an error, the stage sends all the records from the statement to the error stream.
INSERT INTO <table name> (<col1>, <col2>, <col3>)
VALUES (<record1 field1>,<record1 field2>,<record1 field3>),
(<r2 f1>,<r2 f2>,<r2 f3>), (<r3 f1>,<r3 f2>,<r3 f3>),...;DELETE FROM <table name> WHERE <primary key> IN (<key1>, <key2>, <key3>,...);DELETE FROM <table name> WHERE (<pkey1>, <pkey2>, <pkey3>)
IN ((<key1-1>, <key1-2>, <key1-3>),(<key2-1>, <key2-2>, <key2-2>),...);Configuring a JDBC Producer
Configure the JDBC Producer to use JDBC to write data to a database table.
-
In the Properties panel, on the General tab, configure the
following properties:
General Property Description Name Stage name. Description Optional description. Required Fields Fields that must include data for the record to be passed into the stage. Tip: You might include fields that the stage uses.Records that do not include all required fields are processed based on the error handling configured for the pipeline.
Preconditions Conditions that must evaluate to TRUE to allow a record to enter the stage for processing. Click Add to create additional preconditions. Records that do not meet all preconditions are processed based on the error handling configured for the stage.
On Record Error Error record handling for the stage: - Discard - Discards the record.
- Send to Error - Sends the record to the pipeline for error handling.
- Stop Pipeline - Stops the pipeline. Not valid for cluster pipelines.
-
On the JDBC tab, configure the following
properties:
JDBC Property Description Connection Connection that defines the information required to connect to an external system. To connect to an external system, you can select a connection that contains the details, or you can directly enter the details in the pipeline. When you select a connection, Control Hub hides other properties so that you cannot directly enter connection details in the pipeline.
JDBC Connection String Connection string used to connect to the database. Use the connection string format required by the database vendor. For example, use the following formats for these database vendors:
- MySQL -
jdbc:mysql://<host>:<port>/<database_name> - Oracle -
jdbc:oracle:<driver_type>:@<host>:<port>:<service_name> - PostgreSQL -
jdbc:postgresql://<host>:<port>/<database_name> - SQL Server -
jdbc:sqlserver://<host>:<port>;databaseName=<database_name>
You can optionally include the user name and password in the connection string.
Schema Name Optional database or schema name to use. Use when the database requires a fully-qualified table name.Tip: Oracle uses all caps for schema, table, and column names by default. Names can be lower- or mixed-case only if the schema, table, or column was created with quotation marks around the name.To use a lower- or mixed-case schema name, enter the name and enable the Enclosed Object Names property.
Table Name Database table name to use. Use the table name format required by the database. Tip: Oracle uses all caps for schema, table, and column names by default. Names can be lower- or mixed-case only if the schema, table, or column was created with quotation marks around the name.To use a lower- or mixed-case table name, enter the name and enable the Enclosed Object Names property.
Use Credentials Enables entering credentials on the Credentials tab. Select when you do not include credentials in the JDBC connection string. Field to Column Mapping Use to override the default field to column mappings. By default, fields are written to columns of the same name. When you override the mappings, you can define parameterized values to apply SQL functions to the field values before writing them to columns. For example, to convert a field value to an integer, enter the following for the parameterized value:CAST(? AS INTEGER)The question mark (?) is substituted with the value of the field. Leave the default value of ? if you do not need to apply a SQL function.
Using simple or bulk edit mode, click the Add icon to create additional field to column mappings.
Enclose Object Names Encloses the database or schema name, table name, and column names in quotation marks when writing to the database. Enables using case-sensitive names or names with special characters. When not enabled, the JDBC driver that the destination uses determines how the names are submitted.
Oracle JDBC drivers submit names as all caps by default. Also, Oracle uses all caps for schema, table, and column names by default. Names can be lower- or mixed-case only if the schema, table, or column was created with quotation marks around the name.
Change Log Format Format of change capture data log produced by the CDC-enabled origin. Used to process change capture data. Default Operation Default CRUD operation to perform if the sdc.operation.typerecord header attribute is not set.Unsupported Operation Handling Action to take when the CRUD operation type defined in the sdc.operation.typerecord header attribute is not supported:- Discard - Discards the record.
- Send to Error - Sends the record to the pipeline for error handling.
- Use Default Operation - Writes the record to the destination system using the default operation.
Use Multi-Row Operation Combines sequential insert operations and sequential delete operations into single statements. Select to insert and delete multiple records at the same time. Before enabling this option, verify that the database supports the multi-row SQL statements used by the stage. By default, the stage performs single-row operations.
Statement Parameter Limit Number of parameters allowed in the prepared statement for multi-row inserts. Use -1 to disable the parameter limit. Default is -1.
Rollback Batch On Error Rolls back the entire batch when an error occurs within the batch. Additional JDBC Configuration Properties Additional JDBC configuration properties to use. To add properties, click Add and define the JDBC property name and value. Use the property names and values as expected by JDBC.
- MySQL -
-
If you configured the origin to enter JDBC credentials
separately from the JDBC connection string on the JDBC tab,
then configure the following properties on the Credentials
tab:
Credentials Property Description Username User name for the JDBC connection. The user account must have the correct permissions or privileges in the database.
Password Password for the JDBC user name. Tip: To secure sensitive information such as user names and passwords, you can use runtime resources or credential stores. For more information about credential stores, see Credential Stores in the Data Collector documentation. -
When using JDBC versions older than 4.0, on the Legacy
Drivers tab, optionally configure the following
properties:
Legacy Drivers Property Description JDBC Class Driver Name Class name for the JDBC driver. Required for JDBC versions older than version 4.0. Connection Health Test Query Optional query to test the health of a connection. Recommended only when the JDBC version is older than 4.0. -
On the Advanced tab, optionally configure advanced
properties.
The defaults for these properties should work in most cases:
Advanced Property Description Maximum Pool Size Maximum number of connections to create. Default is 1. The recommended value is 1.
Minimum Idle Connections Minimum number of connections to create and maintain. To define a fixed connection pool, set to the same value as Maximum Pool Size. Default is 1.
Connection Timeout (seconds) Maximum time to wait for a connection. Use a time constant in an expression to define the time increment. Default is 30 seconds, defined as follows:${30 * SECONDS}Idle Timeout (seconds) Maximum time to allow a connection to idle. Use a time constant in an expression to define the time increment. Use 0 to avoid removing any idle connections.
When the entered value is close to or more than the maximum lifetime for a connection, Data Collector ignores the idle timeout.
Default is 10 minutes, defined as follows:${10 * MINUTES}Max Connection Lifetime (seconds) Maximum lifetime for a connection. Use a time constant in an expression to define the time increment. Use 0 to set no maximum lifetime.
When a maximum lifetime is set, the minimum valid value is 30 minutes.
Default is 30 minutes, defined as follows:${30 * MINUTES}Transaction Isolation Transaction isolation level used to connect to the database. Default is the default transaction isolation level set for the database. You can override the database default by setting the level to any of the following:
- Read committed
- Read uncommitted
- Repeatable read
- Serializable
Init Query SQL query to perform immediately after the stage connects to the database. Use to set up the database session as needed. For example, the following query deletes existing records in a table before writing new records:
DELETE FROM <table>;Data SQLSTATE Codes List of SQLSTATE codes to treat as data errors. The destination applies error record handling to records that trigger a listed code. When a record triggers a SQLSTATE code not listed, the destination generates a stage error that stops the pipeline.
To add a code, click Add and enter the code.