--no commit message

--no commit message

h2/src/docsrc/html/history.html

@@ -40,7 +40,15 @@ Hypersonic SQL or HSQLDB. H2 is built from scratch.
 <h3>Version 1.0 (Current)</h3>
 
 <h3>Version 1.0.x (2007-09-x)</h3><ul>
-<li>Using spaces in column and table aliases was not supported when used inside a view or temporary view.
+<li>After deleting data, empty space in the database files was not efficiently reused
+	(but it was reused when opening the database). This has been fixed.
+</li><li>About 230 bytes per database was leaked. This is a problem for applications
+	opening and closing many thousand databases. The main problem: a shutdown hook
+	was added but never removed. Fixed. In JDK 1.4, there is an additionally problem,
+	see http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4197876. 
+	A workaround has been implemented.
+</li><li>Optimization for COLUMN IN(.., NULL) if the column does not allow NULL values.
+</li><li>Using spaces in column and table aliases was not supported when used inside a view or temporary view.
 </li><li>The version (build) number is now included in the manifest file.
 </li><li>In some systems, SecureRandom.generateSeed is very slow (taking one minute or more).
 	For those cases, an alternative method is used that takes less than one second.
@@ -730,6 +738,12 @@ Hypersonic SQL or HSQLDB. H2 is built from scratch.
 </li><li>Support indexes for views (probably requires materialized views)
 </li><li>Linked tables that point to the same database should share the connection
 </li><li>Use log for rollback
+</li><li>Document SET SEARCH_PATH, BEGIN, EXECUTE, $ parameters
+</li><li>Complete Javadocs for ErrorCode messages and add to docs
+</li><li>Browser: use Desktop.isDesktopSupported and browse when using JDK 1.6
+</li><li>Document org.h2.samples.MixedMode
+</li><li>Server: use one listener (detect if the request comes from an PG or TCP client)
+</li><li>Store dates as 'local'. Existing files use GMT. Use escape syntax for backward compatiblity)
 </li></ul>
 
 <h3>Not Planned</h3>

h2/src/main/org/h2/engine/Database.java

@@ -137,6 +137,7 @@ public class Database implements DataHandler {
     private String accessModeLog, accessModeData;
     private boolean referentialIntegrity = true;
     private boolean multiVersion;
+    private DatabaseCloser closeOnExit;
 
     public Database(String name, ConnectionInfo ci, String cipher) throws SQLException {
         this.compareMode = new CompareMode(null, null);
@@ -180,7 +181,7 @@ public class Database implements DataHandler {
                 open(traceLevelFile, traceLevelSystemOut);
             }
             if (closeAtVmShutdown) {
-                DatabaseCloser closeOnExit = new DatabaseCloser(this, 0, true);
+                closeOnExit = new DatabaseCloser(this, 0, true);
                 try {
                     Runtime.getRuntime().addShutdownHook(closeOnExit);
                 } catch (IllegalStateException e) {
@@ -841,6 +842,15 @@ public class Database implements DataHandler {
         }
         traceSystem.getTrace(Trace.DATABASE).info("closed");
         traceSystem.close();
+        if (closeOnExit != null) {
+            closeOnExit.reset();
+            try {
+                Runtime.getRuntime().removeShutdownHook(closeOnExit);
+            } catch (IllegalStateException e) {
+                // ignore
+            }
+            closeOnExit = null;
+        }
         Engine.getInstance().close(databaseName);
         if (deleteFilesOnDisconnect && persistent) {
             deleteFilesOnDisconnect = false;

h2/src/main/org/h2/engine/DatabaseCloser.java

@@ -11,6 +11,7 @@ public class DatabaseCloser extends Thread {
     private final boolean shutdownHook;
     private volatile WeakReference databaseRef;
     private int delayInMillis;
+    private boolean stopImmediately;
 
     DatabaseCloser(Database db, int delayInMillis, boolean shutdownHook) {
         this.databaseRef = new WeakReference(db);
@@ -22,9 +23,19 @@ public class DatabaseCloser extends Thread {
         synchronized (this) {
             databaseRef = null;
         }
+        if (getThreadGroup().activeCount() > 100) {
+            // in JDK 1.4 and below, all Thread objects are added to the ThreadGroup, 
+            // and cause a memory leak if never started.
+            // Need to start it, otherwise it leaks memory in JDK 1.4 and below
+            stopImmediately = true;
+            start();
+        }
     }
 
     public void run() {
+        if (stopImmediately) {
+            return;
+        }
         while (delayInMillis > 0) {
             try {
                 int step = 100;

h2/src/main/org/h2/server/pg/pg_catalog.sql

@@ -56,9 +56,6 @@ merge into pg_catalog.pg_type values(
     0
 );
 
-
-
-    
 create view pg_catalog.pg_class -- (oid, relname, relnamespace, relkind, relam, reltuples, relpages, relhasrules, relhasoids) 
 as 
 select 

h2/src/main/org/h2/store/DiskFile.java

@@ -185,7 +185,7 @@ public class DiskFile implements CacheWriter {
         }
     }
 
-    private boolean isPageFree(int page) {
+    boolean isPageFree(int page) {
         for (int i = page * BLOCKS_PER_PAGE; i < (page + 1) * BLOCKS_PER_PAGE; i++) {
             if (used.get(i)) {
                 return false;
@@ -500,8 +500,7 @@ public class DiskFile implements CacheWriter {
         for (int i = pos; i < pos + blockCount; i++) {
             used.clear(i);
             if ((i % BLOCKS_PER_PAGE == 0) && (pos + blockCount >= i + BLOCKS_PER_PAGE)) {
-                // if this is the first page of a block and if the whole page is
-                // free
+                // if this is the first page of a block and if the whole page is free
                 setPageOwner(getPage(i), -1);
             }
         }

h2/src/main/org/h2/store/Storage.java

@@ -37,6 +37,7 @@ public class Storage {
     private int id;
     private Database database;
     private DataPage dummy;
+    private int pageCheckIndex;
 
     public Storage(Database database, DiskFile file, RecordReader reader, int id) {
         this.database = database;
@@ -133,6 +134,7 @@ public class Storage {
     }
 
     public void removeRecord(Session session, int pos) throws SQLException {
+        checkOnePage();
         Record record = getRecord(session, pos);
         if (SysProperties.CHECK && record.getDeleted()) {
             throw Message.getInternalError("duplicate delete " + pos);
@@ -144,10 +146,6 @@ public class Storage {
         file.removeRecord(session, pos, record, blockCount);
     }
 
-    public void removeRecord(Session session, int pos, int blockCount) throws SQLException {
-
-    }
-
     private boolean isFreeAndMine(int pos, int blocks) {
         BitField used = file.getUsed();
         for (int i = blocks + pos - 1; i >= pos; i--) {
@@ -254,5 +252,24 @@ public class Storage {
     void removePage(int i) {
         pages.removeValue(i);
     }
+    
+private int test;
+//private static long totalCheck;
+    private void checkOnePage() throws SQLException {
+//        if(true) return;
+//long time = System.currentTimeMillis();
+        pageCheckIndex = (pageCheckIndex + 1) % pages.size();
+        int page = pages.get(pageCheckIndex);
+        if (file.isPageFree(page)) {
+//System.out.println("found one! " + page);            
+            file.setPageOwner(page, -1);
+        }
+//time = System.currentTimeMillis() - time;
+//totalCheck+= time;
+//if(totalCheck > 1000) {
+//    System.out.println("##took one second");
+//    totalCheck--;
+//}
+    }
 
 }

h2/src/main/org/h2/table/TableFilter.java

@@ -251,7 +251,9 @@ public class TableFilter implements ColumnResolver {
             if (alwaysFalse) {
                 state = AFTER_LAST;
             } else {
-                scanCount++;
+                if ((++scanCount & 4095) == 0) {
+                    logScanCount();
+                }
                 if (cursor.next()) {
                     currentSearchRow = cursor.getSearchRow();
                     current = null;
@@ -300,6 +302,10 @@ public class TableFilter implements ColumnResolver {
         state = AFTER_LAST;
         return false;
     }
+    
+    private void logScanCount() {
+        // System.out.println(this.alias+ " " + table.getName() + ": " + scanCount);
+    }
 
     private boolean isOk(Expression condition) throws SQLException {
         if (condition == null) {

h2/src/main/org/h2/tools/Csv.java

@@ -43,9 +43,7 @@ public class Csv implements SimpleRowSource {
     private char fieldDelimiter = '\"';
     private char escapeCharacter = '\"';
     private String fileName;
-    private InputStream in;
     private Reader reader;
-    private OutputStream out;
     private PrintWriter writer;
     private int back;
     private boolean endOfLine, endOfFile;
@@ -226,9 +224,9 @@ public class Csv implements SimpleRowSource {
     private void initWrite() throws IOException {
         if (writer == null) {
             try {
-                out = new FileOutputStream(fileName);
-                BufferedOutputStream o = new BufferedOutputStream(out, bufferSize);
-                writer = new PrintWriter(new OutputStreamWriter(o, charset));
+                OutputStream out = new FileOutputStream(fileName);
+                out = new BufferedOutputStream(out, bufferSize);
+                writer = new PrintWriter(new OutputStreamWriter(out, charset));
                 // TODO performance: what is faster? one, two, or both?
                 // writer = new PrintWriter(new BufferedWriter(new
                 // OutputStreamWriter(out, encoding), bufferSize));
@@ -287,12 +285,11 @@ public class Csv implements SimpleRowSource {
     private void initRead() throws IOException {
         if (reader == null) {
             try {
-                in = FileUtils.openFileInputStream(fileName);
-                BufferedInputStream i = new BufferedInputStream(in, bufferSize);
-                reader = new InputStreamReader(i, charset);
+                InputStream in = FileUtils.openFileInputStream(fileName);
+                in = new BufferedInputStream(in, bufferSize);
+                reader = new InputStreamReader(in, charset);
                 // TODO what is faster, 1, 2, 1+2
-                // reader = new BufferedReader(new InputStreamReader(in,
-                // encoding), bufferSize);
+                // reader = new BufferedReader(new InputStreamReader(in, encoding), bufferSize);
             } catch (IOException e) {
                 close();
                 throw e;
@@ -500,12 +497,8 @@ public class Csv implements SimpleRowSource {
     public void close() {
         IOUtils.closeSilently(reader);
         reader = null;
-        IOUtils.closeSilently(in);
-        in = null;
         IOUtils.closeSilently(writer);
         writer = null;
-        IOUtils.closeSilently(out);
-        out = null;
     }
 
     /**

h2/src/main/org/h2/tools/RunScript.java

@@ -22,6 +22,7 @@ import org.h2.engine.Constants;
 import org.h2.message.Message;
 import org.h2.util.ClassUtils;
 import org.h2.util.FileUtils;
+import org.h2.util.IOUtils;
 import org.h2.util.ObjectUtils;
 import org.h2.util.JdbcUtils;
 import org.h2.util.ScriptReader;
@@ -159,11 +160,11 @@ public class RunScript {
         InputStream in = FileUtils.openFileInputStream(fileName);
         String path = FileUtils.getParent(fileName);
         try {
-            BufferedInputStream bin = new BufferedInputStream(in, Constants.IO_BUFFER_SIZE);
-            InputStreamReader reader = new InputStreamReader(bin, charsetName);
+            in = new BufferedInputStream(in, Constants.IO_BUFFER_SIZE);
+            InputStreamReader reader = new InputStreamReader(in, charsetName);
             execute(conn, threadMap, continueOnError, path, reader, charsetName);
         } finally {
-            in.close();
+            IOUtils.closeSilently(in);
         }
     }
 

h2/src/test/org/h2/test/TestAll.java

@@ -148,49 +148,9 @@ java -Xmx512m -Xrunhprof:cpu=samples,depth=8 org.h2.tools.RunScript
         
 /*
 
-SYSDATE sollte CURRENT_TIMESTAMP
-support Trunc(Sysdate),...
-public static String chr(int code) {
-    return String.valueOf((char) code);
-}
-public static Object nvl(Object value, Object ifNull) {
-    return (value != null) ? value : ifNull;
-}
-public static Object nvl2(Object value, Object notNull, Object ifNull) {
-    return (value != null) ? notNull : ifNull;
-}
-public static Timestamp sysdate() {
-    return new Timestamp(System.currentTimeMillis());
-}
-public static String to_char(Object what, String format) {
-    throw new Error("not yet");   // @todo check format
-}
-public static Date to_date(Object what, String format) {
-    throw new Error("not yet");   // @todo check format
-}
-public static Number to_number(String str) {
-    return new Double(str);
-}
-public static java.sql.Date trunc(Timestamp tsp) {
-    return new java.sql.Date(tsp.getTime());
-}
-public static Object trunc(Object what, String format) {
-    System.out.println("*** trunc ***");
-    if (what == null)
-        return null;
-    else if (what instanceof Date) {
-        System.out.println("*** date-format = " + format);
-        return Timestamp.valueOf("1963-03-27 12:34:56.0");
-    } else if (what instanceof Number) {
-        System.out.println("*** number-format = " + format);
-        return new Double(123.456D);
-    } else
-        throw new ClassCastException("number or date expected");
-}        
-        
+database files grow when updating data
 
 slow:
-
 select ta.attname, ia.attnum, ic.relname 
 from pg_catalog.pg_attribute ta, pg_catalog.pg_attribute ia, pg_catalog.pg_class ic, pg_catalog.pg_index i, pg_catalog.pg_namespace n 
 where ic.relname = 'dummy_pkey' 
@@ -204,51 +164,10 @@ AND (NOT ta.attisdropped)
 AND (NOT ia.attisdropped) 
 order by ia.attnum;
 
-
-database files grow when updating data
-
 change default for in-memory undo
 
 japanese topics in the javascript search
 
-feature request: optimization for
-where link_id in (?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
-with NULL and LINK_ID doesn't allow nulls
-
-slow power off test: slow memFS?
-
-DROP TABLE ONE; 
-DROP TABLE TWO; 
-CREATE TABLE ONE(A INT PRIMARY KEY, B INT); 
-INSERT INTO ONE VALUES(0, NULL); 
-INSERT INTO ONE VALUES(1, 0);
-INSERT INTO ONE VALUES(2, 1); 
-INSERT INTO ONE VALUES(3, 4); 
-CREATE TABLE TWO(A INT PRIMARY KEY, B INT); 
-INSERT INTO TWO VALUES(0, NULL);
-INSERT INTO TWO VALUES(1, 0); 
-INSERT INTO TWO VALUES(2, 2); 
-INSERT INTO TWO VALUES(3, 3); 
-INSERT INTO TWO VALUES(4, NULL);
-
-SELECT * FROM ONE A LEFT JOIN ONE B ON NOT A.A=A.A;
-        
-SELECT T0.A FROM TWO T0 WHERE NOT ((T0.B=T0.A ) AND (T0.B=0 )) AND (T0.B IS NULL );
-
-SELECT T0.A, T1.A, T2.A, T3.A FROM ONE T0 LEFT JOIN ONE T1 ON NOT T0.B=T0.B LEFT JOIN ONE T2 ON T1.A=T2.A LEFT JOIN ONE T3 ON (T3.B=0 ) OR (T2.A<-1 );
-
-SELECT T0.A, T1.A, T2.A, T3.A FROM TWO T0 LEFT JOIN ONE T1 ON T0.B<T0.A LEFT JOIN ONE T2 ON T1.A=T2.A LEFT JOIN TWO T3 ON (T2.A=T3.A ) OR (T3.B=0 );
-
-SELECT T0.A, T1.A, T2.A, T3.A FROM TWO T0 LEFT JOIN ONE T1 ON T0.B>2 LEFT JOIN ONE T2 ON T1.A=T2.A LEFT JOIN TWO T3 ON T2.A IS NULL;
-        
-SELECT T0.A, T1.A FROM TWO T0 INNER JOIN TWO T1 ON NOT (((T0.A=T0.B ) AND (T0.B=0 )) OR (T0.A=T1.A )) OR (T0.A=T0.B );
-
-SELECT T0.A, T1.A FROM ONE T0 INNER JOIN ONE T1 ON NOT ((T0.A=T0.B ) AND (T0.B=1 )) OR (T0.B=2 );
-
-document:
-maximum file size increment is 16 MB
-dont increase database size by more than 128 MB
-
 DROP TABLE IF EXISTS TEST;
 CREATE TABLE TEST(ID INT PRIMARY KEY, NAME VARCHAR);
 @LOOP 1000000 INSERT INTO TEST VALUES(?, SPACE(100000));
@@ -266,15 +185,11 @@ add MVCC
 
 don't create @~ of not translated
 
-improve documentation of 'mixed mode' usage.
-
 test performance and document fulltext search
 
 clustered tables: test, document
 
 search for japanese: works, but is it ok?
-pdf: first page looks empty (because the top part is empty) - title on the top?
-pdf / openoffice: pictures don't work?
 
 extend tests that simulate power off
 
@@ -330,27 +245,16 @@ Test Eclipse DTP 1.5 (HSQLDB / H2 connection bug fixed)
 
 Automate real power off tests
 
-Negative dictionary:
-Please note that
-
-Merge more from diff.zip (Pavel Ganelin)
-Integrate patches from Pavel Ganelin: www.dullesopen.com/software/h2-database-03-04-07-mod.src.zip
-
-store dates as 'local'. Problem: existing files use GMT (use escape syntax)
 drop table test;
 CREATE TABLE TEST( ID BIGINT PRIMARY KEY,  CREATED TIMESTAMP);
 INSERT INTO TEST VALUES(1, '2007-01-01 00:00:00');
 SELECT * FROM TEST;
 
-Server: use one listener (detect if the request comes from an PG or TCP client).
-
 http://fastutil.dsi.unimi.it/
 http://javolution.org/
 http://joda-time.sourceforge.net/
 http://ibatis.apache.org/
 
-Document org.h2.samples.MixedMode
-
 http://www.igniterealtime.org/projects/openfire/index.jsp
 
 translation:
@@ -366,15 +270,47 @@ translated .pdf
 docs: xml:lang="en" > correct language (and detect wrong language based on _ja)
 docs: xhtml: use UTF-8 encoding (<?xml version="1.0"?>)
 
-io: wrapped streams are closed: simplify code
-
-document SET SEARCH_PATH, BEGIN, EXECUTE, $ parameters
-
-Complete Javadocs for Messages and add to docs
-
 write tests using the PostgreSQL JDBC driver
 
-JDK 1.6: Desktop.isDesktopSupported, browse(URI uri)
+SYSDATE sollte CURRENT_TIMESTAMP
+support Trunc(Sysdate),...
+public static String chr(int code) {
+    return String.valueOf((char) code);
+}
+public static Object nvl(Object value, Object ifNull) {
+    return (value != null) ? value : ifNull;
+}
+public static Object nvl2(Object value, Object notNull, Object ifNull) {
+    return (value != null) ? notNull : ifNull;
+}
+public static Timestamp sysdate() {
+    return new Timestamp(System.currentTimeMillis());
+}
+public static String to_char(Object what, String format) {
+    throw new Error("not yet");   // @todo check format
+}
+public static Date to_date(Object what, String format) {
+    throw new Error("not yet");   // @todo check format
+}
+public static Number to_number(String str) {
+    return new Double(str);
+}
+public static java.sql.Date trunc(Timestamp tsp) {
+    return new java.sql.Date(tsp.getTime());
+}
+public static Object trunc(Object what, String format) {
+    System.out.println("*** trunc ***");
+    if (what == null)
+        return null;
+    else if (what instanceof Date) {
+        System.out.println("*** date-format = " + format);
+        return Timestamp.valueOf("1963-03-27 12:34:56.0");
+    } else if (what instanceof Number) {
+        System.out.println("*** number-format = " + format);
+        return new Double(123.456D);
+    } else
+        throw new ClassCastException("number or date expected");
+}        
 
 */