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提交 1cdec2b8 authored 作者: Thomas Mueller's avatar Thomas Mueller
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h2/src/docsrc/html/links.html
浏览文件 @ 1cdec2b8
......@@ -249,6 +249,11 @@ Phase-6</a><br />
A computer based learning software.
</p>
<p><a href="http://code.google.com/p/pickle4j">
Pickle</a><br />
Pickle is a Java library containing classes for persistence, concurrency, and logging.
</p>
<p><a href="http://www.polepos.org">
PolePosition</a><br />
Open source database benchmark.
......
h2/src/docsrc/html/roadmap.html
浏览文件 @ 1cdec2b8
......@@ -57,7 +57,7 @@ Roadmap
</li><li>Procedural language / script language (Javascript)
</li><li>Change LOB mechanism (less files, keep index of lob files, point to files and row, delete unused files earlier, maybe bundle files into a tar file)
</li><li>Clustering: recovery needs to becomes fully automatic. Global write lock feature.
</li><li>Option for Java functions: constant/isDeterministic to allow early evaluation when all parameters are constant
</li><li>Option for Java functions: constant/isDeterministic/readonly/pure (always return the same value) to allow early evaluation when all parameters are constant
</li><li>Support function overloading as in Java (multiple functions with the same name, but different parameter count or data types)
</li><li>Deferred integrity checking (DEFERRABLE INITIALLY DEFERRED)
</li><li>Groovy Stored Procedures (http://groovy.codehaus.org/Groovy+SQL)
......@@ -65,8 +65,6 @@ Roadmap
</li><li>Add a migration guide (list differences between databases)
</li><li>Optimization: automatic index creation suggestion using the trace file?
</li><li>Compression performance: don't allocate buffers, compress / expand in to out buffer
</li><li>Connection pool manager
</li><li>Implement Statement.cancel for server connections
</li><li>Start / stop server with database URL
</li><li>Sequence: add features [NO] MINVALUE, MAXVALUE, CYCLE
</li><li>Rebuild index functionality (other than delete the index file)
......@@ -79,16 +77,15 @@ Roadmap
</li><li>Test with dbcopy (http://dbcopyplugin.sourceforge.net)
</li><li>Find a tool to view a text file >100 MB, with find, page up and down (like less)
</li><li>Implement, test, document XAConnection and so on
</li><li>Web site: meta keywords, description, get rid of frame set
</li><li>Web site: get rid of frame set
</li><li>Pluggable data type (for compression, validation, conversion, encryption)
</li><li>CHECK: find out what makes CHECK=TRUE slow, move to CHECK2
</li><li>Improve recovery: improve code for log recovery problems (less try/catch)
</li><li>Log linear hash index changes, fast open / close
</li><li>Index usage for (ID, NAME)=(1, 'Hi'); document
</li><li>Suggestion: include jetty as Servlet Container (like LAMP)
</li><li>Suggestion: include Jetty as Servlet Container (like LAMP)
</li><li>Trace shipping to server
</li><li>Performance / server mode: use UDP optionally?
</li><li>Version check: docs / web console (using javascript), and maybe in the library (using TCP/IP)
</li><li>Version check: docs / web console (using Javascript), and maybe in the library (using TCP/IP)
</li><li>Web server classloader: override findResource / getResourceFrom
</li><li>Cost for embedded temporary view is calculated wrong, if result is constant
</li><li>Comparison: pluggable sort order: natural sort
......@@ -98,7 +95,6 @@ Roadmap
</li><li>iReport to support H2
</li><li>Implement missing JDBC API (CallableStatement,...)
</li><li>Compression of the cache
</li><li>Run H2 Console inside servlet (pass-through servlet of fix the JSP / app)
</li><li>Include SMPT (mail) server (at least client) (alert on cluster failure, low disk space,...)
</li><li>Drop with restrict (currently cascade is the default)
</li><li>JSON parser and functions
......@@ -109,7 +105,6 @@ Roadmap
</li><li>Support SET TABLE DUAL READONLY
</li><li>Linked schema using CSV files: one schema for a directory of files; support indexes for CSV files
</li><li>Don't write stack traces for common exceptions like duplicate key to the log by default
</li><li>Setting for MAX_QUERY_TIME (default no limit?)
</li><li>GCJ: what is the state now?
</li><li>Use Janino to convert Java to C++
</li><li>Reduce disk space usage (Derby uses less disk space?)
......@@ -121,11 +116,7 @@ Roadmap
</li><li>Custom class loader to reload functions on demand
</li><li>Test http://mysql-je.sourceforge.net/
</li><li>Close all files when closing the database (including LOB files that are open on the client side)
</li><li>Test Connection Pool http://jakarta.apache.org/commons/dbcp
</li><li>Profiler option or profiling tool to find long running and often repeated queries (using DatabaseEventListener API)
</li><li>Allow custom settings (@PATH for RUNSCRIPT for example)
</li><li>EXE file: maybe use http://jsmooth.sourceforge.net
</li><li>Automatically delete the index file if opening it fails
</li><li>Performance: Automatically build in-memory indexes if the whole table is in memory
</li><li>H2 Console: The webclient could support more features like phpMyAdmin.
</li><li>The HELP information schema can be directly exposed in the Console
......@@ -138,11 +129,8 @@ Roadmap
</li><li>Date: default date is '1970-01-01' (is it 1900-01-01 in the standard / other databases?)
</li><li>Test and document UPDATE TEST SET (ID, NAME) = (SELECT ID*10, NAME || '!' FROM TEST T WHERE T.ID=TEST.ID);
</li><li>Max memory rows / max undo log size: use block count / row size not row count
</li><li>Index summary is only written if log=2; maybe write it also when log=1 and everything is fine (and no in doubt transactions)
</li><li>Support 123L syntax as in Java; example: SELECT (2000000000*2)
</li><li>Implement point-in-time recovery
</li><li>Memory database: add a feature to keep named database open until 'shutdown'
</li><li>Use the directory of the first script as the default directory for any scripts run inside that script
</li><li>Include the version name in the jar file name
</li><li>Optimize ID=? OR ID=?: convert to IN(...)
</li><li>LIKE: improved version for larger texts (currently using naive search)
......@@ -151,7 +139,6 @@ Roadmap
</li><li>Automatically convert to the next 'higher' data type whenever there is an overflow.
</li><li>Throw an exception when the application calls getInt on a Long (optional)
</li><li>Default date format for input and output (local date constants)
</li><li>Cache collation keys for performance
</li><li>ValueInt.convertToString and so on (remove Value.convertTo)
</li><li>Support custom Collators
</li><li>Document ROWNUM usage for reports: SELECT ROWNUM, * FROM (subquery)
......@@ -160,15 +147,9 @@ Roadmap
</li><li>Standalone tool to get relevant system properties and add it to the trace output.
</li><li>Support mixed clustering mode (one embedded, the other server mode)
</li><li>Support 'call proc(1=value)' (PostgreSQL, Oracle)
</li><li>HSQLDB compatibility: "INSERT INTO TEST(name) VALUES(?); SELECT IDENTITY()"
</li><li>Shutdown lock (shutdown can only start if there are no logins pending, and logins are delayed until shutdown ends)
</li><li>Automatically delete the index file if opening it fails
</li><li>DbAdapters http://incubator.apache.org/cayenne/
</li><li>JAMon (proxy jdbc driver)
</li><li>Console: Allow setting Null value; Alternative display format two column (for copy and paste as well)
</li><li>Console: Improve editing data (Tab, Shift-Tab, Enter, Up, Down, Shift+Del?)
</li><li>Console: Autocomplete Ctrl+Space inserts template
</li><li>Google Code http://code.google.com/p/h2database/issues/list#
</li><li>Simplify translation ('Donate a translation')
</li><li>Option to encrypt .trace.db file
</li><li>Write Behind Cache on SATA leads to data corruption See also http://sr5tech.com/write_back_cache_experiments.htm and http://www.jasonbrome.com/blog/archives/2004/04/03/writecache_enabled.html
......@@ -180,7 +161,7 @@ Roadmap
</li><li>RANK() and DENSE_RANK(), Partition using OVER()
</li><li>ROW_NUMBER (not the same as ROWNUM)
</li><li>Partial indexing (see PostgreSQL)
</li><li>BUILD should fail if ant test fails
</li><li>The build should fail if the test fails
</li><li>http://rubyforge.org/projects/hypersonic/
</li><li>DbVisualizer profile for H2
</li><li>Add comparator (x === y) : (x = y or (x is null and y is null))
......@@ -190,7 +171,6 @@ Roadmap
</li><li>Table order: ALTER TABLE TEST ORDER BY NAME DESC (MySQL compatibility)
</li><li>Backup tool should work with other databases as well
</li><li>Console: -ifExists doesn't work for the console. Add a flag to disable other dbs
</li><li>Maybe use Fowler Noll Vo hash function
</li><li>Improved full text search (supports LOBs, reader / tokenizer / filter).
</li><li>Performance: Update in-place
</li><li>Check if 'FSUTIL behavior set disablelastaccess 1' improves the performance (fsutil behavior query disablelastaccess)
......@@ -219,44 +199,32 @@ Roadmap
</li><li>Improve create index performance
</li><li>Support ARRAY data type
</li><li>Implement more JDBC 4.0 features
</li><li>H2 Console: implement a servlet to allow simple web app integration
</li><li>Support TRANSFORM / PIVOT as in MS Access
</li><li>SELECT * FROM (VALUES (...), (...), ....) AS alias(f1, ...)
</li><li>Support updatable views with join on primary keys (to extend a table)
</li><li>Public interface for functions (not public static)
</li><li>Autocomplete: if I type the name of a table that does not exist (should say: syntax not supported)
</li><li>Autocomplete: schema support: "Other Grammar","Table Expression","{[schemaName.]tableName | (select)} [[AS] newTableAlias]
</li><li>Functions: options readonly, deterministic (pure, always return the same value)
</li><li>Document FTP server, including -ftpTask option to execute / kill remote processes
</li><li>Eliminate undo log records if stored on disk (just one pointer per block, not per record)
</li><li>Feature matrix like in <a href="http://www.inetsoftware.de/products/jdbc/mssql/features/default.asp">i-net software</a>.
</li><li>Updatable result set on table without primary key or unique index
</li><li>Use LinkedList instead of ArrayList where applicable
</li><li>Optimization: (A=B AND B=C) > (A=B AND B=C AND A=C)
</li><li>Support % operator (modulo)
</li><li>Large subqueries: close them when the main query is closed, not earlier (so result can be reused)
</li><li>Support 1+'2'=3, '1'+'2'='12' (MS SQL Server compatibility)
</li><li>Support nested transactions
</li><li>Add a benchmark for big databases, and one for many users
</li><li>Compression in the result set (repeating values in the same column)
</li><li>Improve command line consistency (+/- options, or true false options)
</li><li>Allow to use the catalog name in statements: [[catalog.]schema.]object
</li><li>Support curtimestamp (like curtime, curdate)
</li><li>Support ANALYZE {TABLE|INDEX} tableName COMPUTE|ESTIMATE|DELETE STATISTICS ptnOption options
</li><li>Support Sequoia (Continuent.org)
</li><li>Dynamic length numbers / special methods for DataPage.writeByte / writeShort / Ronni Nielsen
</li><li>Pluggable ThreadPool, (AvalonDB / deebee / Paul Hammant)
</li><li>Recursive Queries (see details)
</li><li>Use index on boolean flag (see details)
</li><li>Add build for embedded database only
</li><li>Add GUI to build a custom version (embedded, fulltext,...)
</li><li>Release locks (shared or exclusive) on demand
</li><li>Support catalog names
</li><li>Add object id to metadata tables
</li><li>Support OUTER UNION
</li><li>Support Parameterized Views (similar to CSVREAD, but using just SQL for the definition)
</li><li>Implement a command line SQL utility similar to HenPlus: http://henplus.sourceforge.net
</li><li>A way (JDBC driver) to map an URL (jdbc:h2map:c1) to a connection object
</li><li>Build script for the embedded functionality only (h2embedded.jar)
</li><li>Option for SCRIPT to only process one or a set of tables, and append to a file
</li><li>Support using a unique index for IS NULL (including linked tables)
</li><li>Support linked tables to the current database
......@@ -269,7 +237,6 @@ Roadmap
</li><li>H2 Console / large result sets: use 'streaming' instead of building the page in-memory
</li><li>Benchmark: add a graph to show how databases scale (performance/database size)
</li><li>Implement a SQLData interface to map your data over to a custom object
</li><li>Extend H2 Console to run tools (show command line as well)
</li><li>Make DDL (Data Definition) operations transactional
</li><li>Allow execution time prepare for SELECT * FROM CSVREAD(?, 'columnNameString')
</li><li>Support multiple directories (on different hard drives) for the same database
......
h2/src/main/org/h2/command/CommandRemote.java
浏览文件 @ 1cdec2b8
......@@ -238,10 +238,9 @@ public class CommandRemote implements CommandInterface {
/**
* Cancel this current statement.
* This method is not yet implemented for this class.
*/
public void cancel() {
// TODO server: support cancel
session.cancelStatement(id);
}
public String toString() {
......
h2/src/main/org/h2/engine/SessionRemote.java
浏览文件 @ 1cdec2b8
......@@ -23,6 +23,7 @@ import org.h2.message.TraceSystem;
import org.h2.result.ResultInterface;
import org.h2.store.DataHandler;
import org.h2.store.FileStore;
import org.h2.util.ByteUtils;
import org.h2.util.FileUtils;
import org.h2.util.NetUtils;
import org.h2.util.ObjectArray;
......@@ -51,6 +52,8 @@ public class SessionRemote implements SessionInterface, DataHandler {
public static final int CHANGE_ID = 9;
public static final int COMMAND_GET_META_DATA = 10;
public static final int SESSION_PREPARE_READ_PARAMS = 11;
public static final int SESSION_SET_ID = 12;
public static final int SESSION_CANCEL_STATEMENT = 13;
public static final int STATUS_ERROR = 0;
public static final int STATUS_OK = 1;
......@@ -68,12 +71,14 @@ public class SessionRemote implements SessionInterface, DataHandler {
private String cipher;
private byte[] fileEncryptionKey;
private Object lobSyncObject = new Object();
private String sessionId;
private int clientVersion = Constants.TCP_DRIVER_VERSION_5;
private Transfer initTransfer(ConnectionInfo ci, String db, String server) throws IOException, SQLException {
Socket socket = NetUtils.createSocket(server, Constants.DEFAULT_SERVER_PORT, ci.isSSL());
Transfer trans = new Transfer(this);
trans.setSocket(socket);
trans.setSSL(ci.isSSL());
trans.init();
trans.writeInt(clientVersion);
trans.writeString(db);
......@@ -96,6 +101,34 @@ public class SessionRemote implements SessionInterface, DataHandler {
autoCommit = true;
return trans;
}
public void cancel() {
// this method is called when closing the connection
// the statement that is currently running is not cancelled in this case
// however Statement.cancel is supported
}
public void cancelStatement(int id) {
for (int i = 0; i < transferList.size(); i++) {
Transfer transfer = (Transfer) transferList.get(i);
try {
Transfer trans = transfer.openNewConnection();
trans.init();
trans.writeInt(clientVersion);
if (clientVersion >= Constants.TCP_DRIVER_VERSION_6) {
trans.writeInt(clientVersion);
}
trans.writeString(null);
trans.writeString(null);
trans.writeString(sessionId);
trans.writeInt(SessionRemote.SESSION_CANCEL_STATEMENT);
trans.writeInt(id);
trans.close();
} catch (IOException e) {
trace.debug("Could not cancel statement", e);
}
}
}
private void switchOffAutoCommitIfCluster() throws SQLException {
if (autoCommit && transferList.size() > 1) {
......@@ -256,6 +289,23 @@ public class SessionRemote implements SessionInterface, DataHandler {
trace.error("Error trying to upgrade client version", e);
// ignore
}
if (clientVersion >= Constants.TCP_DRIVER_VERSION_6) {
sessionId = ByteUtils.convertBytesToString(RandomUtils.getSecureBytes(32));
synchronized (this) {
for (int i = 0; i < transferList.size(); i++) {
Transfer transfer = (Transfer) transferList.get(i);
try {
traceOperation("SESSION_SET_ID", 0);
transfer.writeInt(SessionRemote.SESSION_SET_ID);
transfer.writeString(sessionId);
done(transfer);
} catch (Exception e) {
trace.error("sessionSetId", e);
}
}
}
}
}
private void switchOffCluster() throws SQLException {
......@@ -454,11 +504,6 @@ public class SessionRemote implements SessionInterface, DataHandler {
return lobSyncObject;
}
public void cancel() {
// TODO open another remote connection and cancel this session
// using a unique id (like PostgreSQL)
}
public boolean getLobFilesInDirectories() {
return false;
}
......
h2/src/main/org/h2/jdbc/JdbcStatement.java
浏览文件 @ 1cdec2b8
......@@ -493,10 +493,9 @@ public class JdbcStatement extends TraceObject implements Statement {
}
/**
* [Partially supported] Cancels a currently running statement.
* Cancels a currently running statement.
* This method must be called from within another
* thread than the execute method.
* This method is not supported in the server mode.
*
* @throws SQLException if this object is closed
*/
......
h2/src/main/org/h2/server/TcpServer.java
浏览文件 @ 1cdec2b8
......@@ -385,4 +385,14 @@ public class TcpServer implements Service {
}
}
public void cancelStatement(String sessionId, int statementId) throws SQLException {
ArrayList list = new ArrayList(running);
for (int i = 0; i < list.size(); i++) {
TcpServerThread c = (TcpServerThread) list.get(i);
if (c != null) {
c.cancelStatement(sessionId, statementId);
}
}
}
}
h2/src/main/org/h2/server/TcpServerThread.java
浏览文件 @ 1cdec2b8
......@@ -28,6 +28,7 @@ import org.h2.result.LocalResult;
import org.h2.result.ResultColumn;
import org.h2.util.ObjectArray;
import org.h2.util.SmallMap;
import org.h2.util.StringUtils;
import org.h2.value.Transfer;
import org.h2.value.Value;
......@@ -44,6 +45,7 @@ public class TcpServerThread implements Runnable {
private SmallMap cache = new SmallMap(SysProperties.SERVER_CACHED_OBJECTS);
private int id;
private int clientVersion;
private String sessionId;
public TcpServerThread(Socket socket, TcpServer server, int id) {
this.server = server;
......@@ -76,6 +78,15 @@ public class TcpServerThread implements Runnable {
}
String db = transfer.readString();
String originalURL = transfer.readString();
if (db == null && originalURL == null) {
String sessionId = transfer.readString();
int command = transfer.readInt();
stop = true;
if (command == SessionRemote.SESSION_CANCEL_STATEMENT) {
int statementId = transfer.readInt();
server.cancelStatement(sessionId, statementId);
}
}
String baseDir = server.getBaseDir();
if (baseDir == null) {
baseDir = SysProperties.getBaseDir();
......@@ -317,6 +328,11 @@ public class TcpServerThread implements Runnable {
cache.addObject(newId, obj);
break;
}
case SessionRemote.SESSION_SET_ID: {
sessionId = transfer.readString();
transfer.writeInt(SessionRemote.STATUS_OK).flush();
break;
}
default:
trace("Unknown operation: " + operation);
closeSession();
......@@ -344,4 +360,11 @@ public class TcpServerThread implements Runnable {
return thread;
}
public void cancelStatement(String sessionId, int statementId) throws SQLException {
if (StringUtils.equals(sessionId, this.sessionId)) {
Command cmd = (Command) cache.getObject(statementId, false);
cmd.cancel();
}
}
}
h2/src/main/org/h2/value/Transfer.java
浏览文件 @ 1cdec2b8
......@@ -17,6 +17,7 @@ import java.io.OutputStreamWriter;
import java.io.Reader;
import java.io.Writer;
import java.math.BigDecimal;
import java.net.InetAddress;
import java.net.Socket;
import java.sql.Date;
import java.sql.ResultSet;
......@@ -34,6 +35,7 @@ import org.h2.message.TraceSystem;
import org.h2.tools.SimpleResultSet;
import org.h2.util.ExactUTF8InputStreamReader;
import org.h2.util.IOUtils;
import org.h2.util.NetUtils;
import org.h2.util.StringCache;
/**
......@@ -49,6 +51,7 @@ public class Transfer {
protected Socket socket;
protected DataInputStream in;
protected DataOutputStream out;
private boolean ssl;
public Transfer(SessionInterface session) {
this.session = session;
......@@ -413,4 +416,18 @@ public class Transfer {
this.session = session;
}
public void setSSL(boolean ssl) {
this.ssl = ssl;
}
public Transfer openNewConnection() throws IOException {
InetAddress address = socket.getInetAddress();
int port = socket.getPort();
Socket socket = NetUtils.createSocket(address, port, ssl);
Transfer trans = new Transfer(null);
trans.setSocket(socket);
trans.setSSL(ssl);
return trans;
}
}
h2/src/test/org/h2/test/TestAll.java
浏览文件 @ 1cdec2b8
......@@ -162,6 +162,10 @@ java org.h2.test.TestAll timer
improve javadocs
Shell / JDK 1.6: use java.io.Console
</li><li>Implement Statement.cancel for server connections
upload jazoon
test case for out of memory (try to corrupt the database using out of memory)
......@@ -211,6 +215,8 @@ Add where required // TODO: change in version 1.1
http://www.w3schools.com/sql/
History:
Statements can now be cancelled remotely
(when using remote connections).
Roadmap:
......@@ -412,7 +418,6 @@ Roadmap:
* Run all tests with the current settings.
*/
private void test() throws Exception {
System.out.println();
System.out.println("Test big:"+big+" net:"+networked+" cipher:"+cipher+" memory:"+memory+" log:"+logMode+" diskResult:"+diskResult + " mvcc:" + mvcc + " deleteIndex:" + deleteIndex);
beforeTest();
......
h2/src/test/org/h2/test/jdbc/TestCancel.java
浏览文件 @ 1cdec2b8
......@@ -16,30 +16,38 @@ import org.h2.constant.ErrorCode;
import org.h2.constant.SysProperties;
import org.h2.test.TestBase;
/**
* Tests Statement.cancel
*/
public class TestCancel extends TestBase {
private static int lastVisited;
class CancelThread extends Thread {
private Statement cancel;
private int wait;
private volatile boolean stop;
CancelThread(Statement cancel, int wait) {
this.cancel = cancel;
this.wait = wait;
}
public void stopNow() {
this.stop = true;
}
public void run() {
try {
Thread.sleep(wait);
cancel.cancel();
Thread.yield();
} catch (SQLException e) {
// ignore errors on closed statements
} catch (Exception e) {
TestBase.logError("sleep", e);
while (!stop) {
try {
Thread.sleep(wait);
cancel.cancel();
Thread.yield();
} catch (SQLException e) {
// ignore errors on closed statements
} catch (Exception e) {
TestBase.logError("sleep", e);
}
}
}
}
......@@ -124,16 +132,22 @@ public class TestCancel extends TestBase {
System.setProperty("h2.maxQueryTimeout", "" + oldMax);
}
}
public static int visit(int x) {
lastVisited = x;
return x;
}
private void testCancelStatement() throws Exception {
deleteDb("cancel");
Connection conn = getConnection("cancel");
Statement stat = conn.createStatement();
stat.execute("DROP TABLE IF EXISTS TEST");
stat.execute("CREATE ALIAS VISIT FOR \"" + getClass().getName() + ".visit\"");
stat.execute("CREATE MEMORY TABLE TEST(ID INT PRIMARY KEY, NAME VARCHAR(255))");
PreparedStatement prep = conn.prepareStatement("INSERT INTO TEST VALUES(?, ?)");
trace("insert");
int len = getSize(1, 1000);
int len = getSize(10, 1000);
for (int i = 0; i < len; i++) {
prep.setInt(1, i);
// prep.setString(2, "Test Value "+i);
......@@ -145,23 +159,21 @@ public class TestCancel extends TestBase {
for (int i = 1;;) {
Statement query = conn.createStatement();
CancelThread cancel = new CancelThread(query, i);
visit(0);
cancel.start();
Thread.yield();
int j = 0;
try {
ResultSet rs = query.executeQuery("SELECT * FROM TEST");
while (rs.next()) {
j++;
}
trace("record count: " + j);
query.executeQuery(
"SELECT VISIT(ID), (SELECT SUM(X) FROM SYSTEM_RANGE(1, 10000) WHERE X<>ID) FROM TEST ORDER BY ID");
} catch (SQLException e) {
checkNotGeneralException(e);
// ignore cancelled statements
trace("record count: " + j);
}
if (j == 0) {
cancel.stopNow();
cancel.join();
if (lastVisited == 0) {
i += 10;
} else if (j == len) {
} else {
break;
}
}
......
h2/src/test/org/h2/test/otherDatabases.txt
浏览文件 @ 1cdec2b8
......@@ -28,6 +28,7 @@ To use the same default settings as H2, use:
jdbc:hsqldb:data/test;hsqldb.default_table_type=cached;sql.enforce_size=true
Also, you need to execute the following statement:
SET WRITE_DELAY 1
No optimization for COUNT(*)
Derby
......@@ -38,3 +39,4 @@ See
http://db.apache.org/derby/javadoc/engine/org/apache/derby/iapi/reference/Property.html#FILESYNC_TRANSACTION_LOG
Missing features:
LIMIT OFFSET is not supported.
No optimization for COUNT(*)
h2/src/tools/org/h2/build/doc/dictionary.txt
浏览文件 @ 1cdec2b8
......@@ -508,4 +508,5 @@ informs negotiations collectively omissions trial nor qualify steward neither
worldwide everyone additions expense lawsuit checksums jazoon flashback
dieguez dfile mvn dversion dgroup dpackaging dartifact durl dpom pom
subpackages slowed deactivate throttled noindex expired arizona export
intentional knowing jcl plug facade deployment logback confusion
intentional knowing jcl plug facade deployment logback confusion visited
pickle
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