ENT-1627 - Allow to set hibernate.dialect setting for pluggable database (#687)

Optional property `database.hibernateDialect` which maps to `hibernate.dialect`.

docs/source/changelog.rst

@@ -37,6 +37,8 @@ Unreleased
 * Fixed node's behaviour on startup when there is no connectivity to network map. Node continues to work normally if it has
   all the needed network data, waiting in the background for network map to become available.
 
+* Added `database.hibernateDialect` node configuration option
+
 .. _changelog_r3_v3:
 
 R3 Corda 3.0 Developer Preview

docs/source/corda-configuration-file.rst

@@ -78,6 +78,9 @@ absolute path to the node's base directory.
     :schema: (optional) some database providers require a schema name when generating DDL and SQL statements.
                  (the value is passed to Hibernate property 'hibernate.default_schema').
 
+    :hibernateDialect: (optional) for explicit definition of ``hibernate.dialect`` property, for most cases Hibernate properly detect
+                       the correct value
+
 :dataSourceProperties: This section is used to configure the jdbc connection and database driver used for the nodes persistence.
     Currently the defaults in ``/node/src/main/resources/reference.conf`` are as shown in the first example. This is currently
     the only configuration that has been tested, although in the future full support for other storage layers will be validated.

node-api/src/main/kotlin/net/corda/nodeapi/internal/persistence/CordaPersistence.kt

@@ -35,7 +35,8 @@ data class DatabaseConfig(
         val runMigration: Boolean = false,
         val transactionIsolationLevel: TransactionIsolationLevel = TransactionIsolationLevel.REPEATABLE_READ,
         val schema: String? = null,
-        val exportHibernateJMXStatistics: Boolean = false
+        val exportHibernateJMXStatistics: Boolean = false,
+        val hibernateDialect: String? = null
 )
 
 // This class forms part of the node config and so any changes to it must be handled with care

node-api/src/main/kotlin/net/corda/nodeapi/internal/persistence/HibernateConfiguration.kt

@@ -90,6 +90,9 @@ class HibernateConfiguration(
             }
             config.setProperty("hibernate.default_schema", schemaName)
         }
+        databaseConfig.hibernateDialect?.apply {
+            config.setProperty("hibernate.dialect", this)
+        }
 
         schemas.forEach { schema ->
             // TODO: require mechanism to set schemaOptions (databaseSchema, tablePrefix) which are not global to session