[
https://issues.apache.org/jira/browse/HIVE-24396?focusedWorklogId=576120&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-576120
]
ASF GitHub Bot logged work on HIVE-24396:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 02/Apr/21 14:23
Start Date: 02/Apr/21 14:23
Worklog Time Spent: 10m
Work Description: yongzhi commented on a change in pull request #2037:
URL: https://github.com/apache/hive/pull/2037#discussion_r606259459
##########
File path:
standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/MetaStoreListenerNotifier.java
##########
@@ -94,6 +96,19 @@ public void notify(MetaStoreEventListener listener,
ListenerEvent event) throws
listener.onDropDatabase((DropDatabaseEvent)event);
}
})
+ .put(EventType.CREATE_DATACONNECTOR, new EventNotifier() {
+ @Override
+ public void notify(MetaStoreEventListener listener,
+ ListenerEvent event) throws MetaException {
+ listener.onCreateDataConnector((CreateDataConnectorEvent)event);
+ }
+ })
+ .put(EventType.DROP_DATACONNECTOR, new EventNotifier() {
+ @Override
+ public void notify(MetaStoreEventListener listener, ListenerEvent
event) throws MetaException {
+ listener.onDropDataConnector((DropDataConnectorEvent)event);
+ }
+ })
Review comment:
Do we need AlterDataConnector event or not?
##########
File path:
ql/src/java/org/apache/hadoop/hive/ql/ddl/database/create/CreateDatabaseAnalyzer.java
##########
@@ -70,19 +73,41 @@ public void analyzeInternal(ASTNode root) throws
SemanticException {
managedLocationUri =
unescapeSQLString(childNode.getChild(0).getText());
outputs.add(toWriteEntity(managedLocationUri));
break;
+ case HiveParser.TOK_DATACONNECTOR:
+ type = DatabaseType.REMOTE.name();
+ ASTNode nextNode = (ASTNode) root.getChild(i);
+ connectorName = ((ASTNode)nextNode).getChild(0).getText();
+ outputs.add(toWriteEntity(connectorName));
+ if (managedLocationUri != null) {
Review comment:
If we do not support managed location for remote type, should we throw
an error when the location is not null? At least a warning? Or user can be
confused with some no effective pass-in location.
##########
File path: parser/src/java/org/apache/hadoop/hive/ql/parse/HiveParser.g
##########
@@ -1106,14 +1126,16 @@ orReplace
createDatabaseStatement
@init { pushMsg("create database statement", state); }
@after { popMsg(state); }
- : KW_CREATE (KW_DATABASE|KW_SCHEMA)
+ : KW_CREATE (remote=KW_REMOTE)? (KW_DATABASE|KW_SCHEMA)
ifNotExists?
name=identifier
databaseComment?
dbLocation?
dbManagedLocation?
+ dbConnectorName?
(KW_WITH KW_DBPROPERTIES dbprops=dbProperties)?
- -> ^(TOK_CREATEDATABASE $name ifNotExists? dbLocation? dbManagedLocation?
databaseComment? $dbprops?)
+ -> {$remote != null}? ^(TOK_CREATEDATABASE $name ifNotExists?
databaseComment? $dbprops? dbConnectorName?)
Review comment:
So, using DB connector for DB, will not create managed tables?
##########
File path:
standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/dataconnector/DataConnectorProviderFactory.java
##########
@@ -0,0 +1,101 @@
+package org.apache.hadoop.hive.metastore.dataconnector;
+
+import org.apache.hadoop.hive.metastore.IHMSHandler;
+import org.apache.hadoop.hive.metastore.api.DataConnector;
+import org.apache.hadoop.hive.metastore.api.Database;
+import org.apache.hadoop.hive.metastore.api.DatabaseType;
+import org.apache.hadoop.hive.metastore.api.MetaException;
+import org.apache.hadoop.hive.metastore.api.NoSuchObjectException;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import static
org.apache.hadoop.hive.metastore.dataconnector.IDataConnectorProvider.*;
+
+public class DataConnectorProviderFactory {
+ Logger LOG = LoggerFactory.getLogger(DataConnectorProviderFactory.class);
+
+ private static Map<String, IDataConnectorProvider> cache = null;
+ private static DataConnectorProviderFactory singleton = null;
+ private static IHMSHandler hmsHandler = null;
+
+ private DataConnectorProviderFactory(IHMSHandler hmsHandler) {
+ cache = new HashMap<String, IDataConnectorProvider>();
+ this.hmsHandler = hmsHandler;
+ }
+
+ public static synchronized DataConnectorProviderFactory
getInstance(IHMSHandler hmsHandler) {
+ if (singleton == null) {
+ singleton = new DataConnectorProviderFactory(hmsHandler);
+ }
+ return singleton;
+ }
+
+ public static synchronized IDataConnectorProvider
getDataConnectorProvider(Database db) throws MetaException {
+ IDataConnectorProvider provider = null;
+ DataConnector connector = null;
+ if (db.getType() == DatabaseType.NATIVE) {
+ throw new MetaException("Database " + db.getName() + " is of type
NATIVE, no connector available");
+ }
+
+ String scopedDb = (db.getRemote_dbname() != null) ? db.getRemote_dbname()
: db.getName();
+ if (cache.containsKey(db.getConnector_name().toLowerCase())) {
+ provider = cache.get(db.getConnector_name().toLowerCase());
+ if (provider != null) {
+ provider.setScope(scopedDb);
+ }
+ return provider;
+ }
+
+ try {
+ connector = hmsHandler.get_dataconnector_core(db.getConnector_name());
+ } catch (NoSuchObjectException notexists) {
+ throw new MetaException("Data connector " + db.getConnector_name() + "
associated with database "
+ + db.getName() + " does not exist");
+ }
+ String type = connector.getType();
+ switch (type) {
+ case DERBY_TYPE:
+ case MSSQL_TYPE:
+ case MYSQL_TYPE:
+ case ORACLE_TYPE:
+ case POSTGRES_TYPE:
+ try {
+ provider = JDBCConnectorProviderFactory.get(scopedDb, connector);
+ } catch (Exception e) {
+ throw new MetaException("Could not instantiate a provider for database
" + db.getName());
+ }
+ break;
+ default:
+ throw new MetaException("Data connector of type " + connector.getType()
+ " not implemented yet");
+ }
+ cache.put(connector.getName().toLowerCase(), provider);
+ return provider;
+ }
+
+ IDataConnectorProvider getDataConnectorProvider(String connectorName) {
+ if (connectorName == null || connectorName.isEmpty()) {
+ return null;
+ }
+
+ if (cache.containsKey(connectorName.toLowerCase() != null)) {
+ return cache.get(connectorName.toLowerCase());
+ }
+ return null;
+ // return getDataConnectorProvider();
Review comment:
Do you only get the DCProvider from cache or get info from hms if the
cache does not have it? Please implement accordingly or remove the commented
statement.
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Issue Time Tracking
-------------------
Worklog Id: (was: 576120)
Time Spent: 9.5h (was: 9h 20m)
> [New Feature] Add data connector support for remote datasources
> ---------------------------------------------------------------
>
> Key: HIVE-24396
> URL: https://issues.apache.org/jira/browse/HIVE-24396
> Project: Hive
> Issue Type: Improvement
> Components: Hive
> Reporter: Naveen Gangam
> Assignee: Naveen Gangam
> Priority: Major
> Labels: pull-request-available
> Time Spent: 9.5h
> Remaining Estimate: 0h
>
> This feature work is to be able to support in Hive Metastore to be able to
> configure data connectors for remote datasources and map databases. We
> currently have support for remote tables via StorageHandlers like
> JDBCStorageHandler and HBaseStorageHandler.
> Data connectors are a natural extension to this where we can map an entire
> database or catalogs instead of individual tables. The tables within are
> automagically mapped at runtime. The metadata for these tables are not
> persisted in Hive. They are always mapped and built at runtime.
> With this feature, we introduce a concept of type for Databases in Hive.
> NATIVE vs REMOTE. All current databases are NATIVE. To create a REMOTE
> database, the following syntax is to be used
> CREATE REMOTE DATABASE remote_db USING <dataconnector> WITH DCPROPERTIES
> (....);
> Will attach a design doc to this jira.
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