Node database

Configuring the node database

H2

By default, nodes store their data in an H2 database. See node-database-access-h2.

Nodes can also be configured to use PostgreSQL and SQL Server. However, these are experimental community contributions. The Corda continuous integration pipeline does not run unit tests or integration tests of these databases.

PostgreSQL

Nodes can also be configured to use PostgreSQL 9.6, using PostgreSQL JDBC Driver 42.1.4. Here is an example node configuration for PostgreSQL:

dataSourceProperties = {
    dataSourceClassName = "org.postgresql.ds.PGSimpleDataSource"
    dataSource.url = "jdbc:postgresql://[HOST]:[PORT]/[DATABASE]"
    dataSource.user = [USER]
    dataSource.password = [PASSWORD]
}
database = {
    transactionIsolationLevel = READ_COMMITTED
}

Note that:

Database schema name can be set in JDBC URL string e.g. currentSchema=my_schema
Database schema name must either match the dataSource.user value to end up on the standard schema search path according to the PostgreSQL documentation, or the schema search path must be set explicitly for the user.
If your PostgresSQL database is hosting multiple schema instances (using the JDBC URL currentSchema=my_schema) for different Corda nodes, you will need to create a hibernate_sequence sequence object manually for each subsequent schema added after the first instance. Corda doesn't provision Hibernate with a schema namespace setting and a sequence object may be not created. Run the DDL statement and replace my_schema with your schema namespace:
```
CREATE SEQUENCE my_schema.hibernate_sequence INCREMENT BY 1 MINVALUE 1 MAXVALUE 9223372036854775807 START 8 CACHE 1 NO CYCLE;
```

SQLServer

Nodes also have untested support for Microsoft SQL Server 2017, using Microsoft JDBC Driver 6.2 for SQL Server. Here is an example node configuration for SQLServer:

dataSourceProperties = {
    dataSourceClassName = "com.microsoft.sqlserver.jdbc.SQLServerDataSource"
    dataSource.url = "jdbc:sqlserver://[HOST]:[PORT];databaseName=[DATABASE_NAME]"
    dataSource.user = [USER]
    dataSource.password = [PASSWORD]
}
database = {
    transactionIsolationLevel = READ_COMMITTED
}
jarDirs = ["[FULL_PATH]/sqljdbc_6.2/enu/"]

Note that:

Ensure the directory referenced by jarDirs contains only one JDBC driver JAR file; by the default, sqljdbc_6.2/enu/contains two JDBC JAR files for different Java versions.

Node database tables

By default, the node database has the following tables:

Table name	Columns
DATABASECHANGELOG	ID, AUTHOR, FILENAME, DATEEXECUTED, ORDEREXECUTED, EXECTYPE, MD5SUM, DESCRIPTION, COMMENTS, TAG, LIQUIBASE, CONTEXTS, LABELS, DEPLOYMENT_ID
DATABASECHANGELOGLOCK	ID, LOCKED, LOCKGRANTED, LOCKEDBY
NODE_ATTACHMENTS	ATT_ID, CONTENT, FILENAME, INSERTION_DATE, UPLOADER
NODE_ATTACHMENTS_CONTRACTS	ATT_ID, CONTRACT_CLASS_NAME
NODE_ATTACHMENTS_SIGNERS	ATT_ID, SIGNER
NODE_CHECKPOINTS	CHECKPOINT_ID, CHECKPOINT_VALUE
NODE_CONTRACT_UPGRADES	STATE_REF, CONTRACT_CLASS_NAME
NODE_IDENTITIES	PK_HASH, IDENTITY_VALUE
NODE_INFOS	NODE_INFO_ID, NODE_INFO_HASH, PLATFORM_VERSION, SERIAL
NODE_INFO_HOSTS	HOST_NAME, PORT, NODE_INFO_ID, HOSTS_ID
NODE_INFO_PARTY_CERT	PARTY_NAME, ISMAIN, OWNING_KEY_HASH, PARTY_CERT_BINARY
NODE_LINK_NODEINFO_PARTY	NODE_INFO_ID, PARTY_NAME
NODE_MESSAGE_IDS	MESSAGE_ID, INSERTION_TIME, SENDER, SEQUENCE_NUMBER
NODE_NAMED_IDENTITIES	NAME, PK_HASH
NODE_NETWORK_PARAMETERS	HASH, EPOCH, PARAMETERS_BYTES, SIGNATURE_BYTES, CERT, PARENT_CERT_PATH
NODE_OUR_KEY_PAIRS	PUBLIC_KEY_HASH, PRIVATE_KEY, PUBLIC_KEY
NODE_PROPERTIES	PROPERTY_KEY, PROPERTY_VALUE
NODE_SCHEDULED_STATES	OUTPUT_INDEX, TRANSACTION_ID, SCHEDULED_AT
NODE_TRANSACTIONS	TX_ID, TRANSACTION_VALUE, STATE_MACHINE_RUN_ID
PK_HASH_TO_EXT_ID_MAP	ID, EXTERNAL_ID, PUBLIC_KEY_HASH
STATE_PARTY	OUTPUT_INDEX, TRANSACTION_ID, ID, PUBLIC_KEY_HASH, X500_NAME
VAULT_FUNGIBLE_STATES	OUTPUT_INDEX, TRANSACTION_ID, ISSUER_NAME, ISSUER_REF, OWNER_NAME, QUANTITY
VAULT_FUNGIBLE_STATES_PARTS	OUTPUT_INDEX, TRANSACTION_ID, PARTICIPANTS
VAULT_LINEAR_STATES	OUTPUT_INDEX, TRANSACTION_ID, EXTERNAL_ID, UUID
VAULT_LINEAR_STATES_PARTS	OUTPUT_INDEX, TRANSACTION_ID, PARTICIPANTS
VAULT_STATES	OUTPUT_INDEX, TRANSACTION_ID, CONSUMED_TIMESTAMP, CONTRACT_STATE_CLASS_NAME, LOCK_ID, LOCK_TIMESTAMP, NOTARY_NAME, RECORDED_TIMESTAMP, STATE_STATUS, RELEVANCY_STATUS, CONSTRAINT_TYPE, CONSTRAINT_DATA
VAULT_TRANSACTION_NOTES	SEQ_NO, NOTE, TRANSACTION_ID
V_PKEY_HASH_EX_ID_MAP	ID, PUBLIC_KEY_HASH, TRANSACTION_ID, OUTPUT_INDEX, EXTERNAL_ID

For more details see: node-database-tables.

Database connection pool

Corda uses Hikari Pool for creating the connection pool. To configure the connection pool any custom properties can be set in the dataSourceProperties section.

For example:

dataSourceProperties = {
    dataSourceClassName = "org.postgresql.ds.PGSimpleDataSource"
    ...
    maximumPoolSize = 10
    connectionTimeout = 50000
}

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