--no commit message

--no commit message

h2/src/main/org/h2/expression/CompareLike.java

@@ -93,6 +93,16 @@ public class CompareLike extends Condition {
             }
             String pattern = r.getString();
             initPattern(pattern, getEscapeChar(e));
+            if ("%".equals(pattern)) {
+                // optimization for X LIKE '%': convert to X IS NOT NULL
+                return new Comparison(session, Comparison.IS_NOT_NULL, left, null).optimize(session);
+            }
+            if (isFullMatch()) {
+                // optimization for X LIKE 'Hello': convert to X = 'Hello'
+                Value value = ValueString.get(patternString);
+                Expression expr = ValueExpression.get(value);
+                return new Comparison(session, Comparison.EQUAL, left, expr).optimize(session);
+            }
             isInit = true;
         }
         return this;
@@ -211,9 +221,8 @@ public class CompareLike extends Condition {
     }
 
     private boolean compare(String s, int pi, int si) {
-        // TODO check if this is correct according to Unicode rules (code
-        // points)
-        return compareMode.compareString(patternString.substring(pi, pi + 1), s.substring(si, si + 1), ignoreCase) == 0;
+        // TODO check if this is correct according to Unicode rules (code points)
+        return compareMode.equalsChars(patternString, pi, s, si, ignoreCase);
     }
 
     private boolean compareAt(String s, int pi, int si, int sLen) {
@@ -307,7 +316,19 @@ public class CompareLike extends Condition {
                 types[i + 1] = ANY;
             }
         }
-        patternString = new String(pattern);
+        patternString = new String(pattern, 0, patternLength);
+    }
+
+    private boolean isFullMatch() {
+        if (types == null) {
+            return false;
+        }
+        for (int i = 0; i < types.length; i++) {
+            if (types[i] != MATCH) {
+                return false;
+            }
+        }
+        return true;
     }
 
     public void mapColumns(ColumnResolver resolver, int level) throws SQLException {

h2/src/main/org/h2/log/LogFile.java

@@ -130,7 +130,7 @@ public class LogFile {
         buff.fill(size);
         buff.setInt(0, blockCount);
         buff.updateChecksum();
-//            IOLogger.getInstance().logWrite(this.fileName, file.getFilePointer(), buff.length());
+        // IOLogger.getInstance().logWrite(this.fileName, file.getFilePointer(), buff.length());
         if (rec != null) {
             unwritten.add(rec);
         }

h2/src/main/org/h2/security/SecureFileStore.java

@@ -93,12 +93,17 @@ public class SecureFileStore extends FileStore {
 
     public void setLength(long newLength) throws SQLException {
         long oldPos = pos;
-        byte[] buff = new byte[Constants.FILE_BLOCK_SIZE];
         long length = length();
         if (newLength > length) {
             seek(length);
-            for (long i = length; i < newLength; i += Constants.FILE_BLOCK_SIZE) {
-                write(buff, 0, Constants.FILE_BLOCK_SIZE);
+            byte[] empty = EMPTY;
+            while (true) {
+                int p = (int) Math.min(newLength - length, EMPTY.length);
+                if (p <= 0) {
+                    break;
+                }
+                write(empty, 0, p);
+                length += p;
             }
             seek(oldPos);
         } else {

h2/src/main/org/h2/server/web/WebThread.java

@@ -657,7 +657,7 @@ class WebThread extends Thread implements DatabaseEventListener {
             return treeIndex;
         }
         boolean isOracle = schema.contents.isOracle;
-        boolean showColumnTypes = tables.length < 100;
+        boolean notManyTables = tables.length < 100;
         for (int i = 0; i < tables.length; i++) {
             DbTableOrView table = tables[i];
             if (table.isView) {
@@ -674,8 +674,8 @@ class WebThread extends Thread implements DatabaseEventListener {
             treeIndex++;
             if (mainSchema) {
                 StringBuffer columnsBuffer = new StringBuffer();
-                treeIndex = addColumns(table, buff, treeIndex, showColumnTypes, columnsBuffer);
-                if (!isOracle) {
+                treeIndex = addColumns(table, buff, treeIndex, notManyTables, columnsBuffer);
+                if (!isOracle && notManyTables) {
                     treeIndex = addIndexes(meta, table.name, schema.name, buff, treeIndex);
                 }
                 buff.append("addTable('" + PageParser.escapeJavaScript(table.name) + "', '"
@@ -699,7 +699,7 @@ class WebThread extends Thread implements DatabaseEventListener {
             treeIndex++;
             if (mainSchema) {
                 StringBuffer columnsBuffer = new StringBuffer();
-                treeIndex = addColumns(view, buff, treeIndex, showColumnTypes, columnsBuffer);
+                treeIndex = addColumns(view, buff, treeIndex, notManyTables, columnsBuffer);
                 if (schema.contents.isH2) {
                     PreparedStatement prep = null;
                     try {
@@ -736,10 +736,6 @@ class WebThread extends Thread implements DatabaseEventListener {
             StringBuffer buff = new StringBuffer();
             buff.append("setNode(0, 0, 0, 'database', '" + PageParser.escapeJavaScript((String) session.get("url"))
                     + "', null);\n");
-//            String version = meta.getDatabaseProductName() + " " + meta.getDatabaseProductVersion();
-//            buff.append("setNode(1, 0, 0, 'info', '" + PageParser.escapeJavaScript(version)+ "', null);\n");
-//
-//            int treeIndex = 2;
             int treeIndex = 1;
 
             DbSchema defaultSchema = contents.defaultSchema;

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

@@ -26,7 +26,7 @@ import org.h2.util.TempFileDeleter;
 public class FileStore {
 
     public static final int HEADER_LENGTH = 3 * Constants.FILE_BLOCK_SIZE;
-    private static final byte[] EMPTY = new byte[16 * 1024];
+    protected static final byte[] EMPTY = new byte[16 * 1024];
 
     protected String name;
     protected DataHandler handler;
@@ -240,14 +240,7 @@ public class FileStore {
         return true;
     }
 
-    public void setLength(long newLength) throws SQLException {
-        if (SysProperties.CHECK && newLength % Constants.FILE_BLOCK_SIZE != 0) {
-            throw Message.getInternalError("unaligned setLength " + name + " pos " + newLength);
-        }
-        checkPowerOff();
-        checkWritingAllowed();
-        try {
-            if (synchronousMode && newLength > fileLength) {
+    private void extendByWriting(long newLength) throws IOException {
         long pos = filePos;
         file.seek(fileLength);
         byte[] empty = EMPTY;
@@ -260,6 +253,17 @@ public class FileStore {
             fileLength += p;
         }
         file.seek(pos);
+    }
+
+    public void setLength(long newLength) throws SQLException {
+        if (SysProperties.CHECK && newLength % Constants.FILE_BLOCK_SIZE != 0) {
+            throw Message.getInternalError("unaligned setLength " + name + " pos " + newLength);
+        }
+        checkPowerOff();
+        checkWritingAllowed();
+        try {
+            if (synchronousMode && newLength > fileLength) {
+                extendByWriting(newLength);
             } else {
                 file.setLength(newLength);
             }

h2/src/main/org/h2/value/CompareMode.java

@@ -24,6 +24,19 @@ public class CompareMode {
         this.name = name == null ? OFF : name;
     }
 
+    public boolean equalsChars(String a, int ai, String b, int bi, boolean ignoreCase) {
+        if (collator != null) {
+            return compareString(a.substring(ai, ai + 1), b.substring(bi, bi + 1), ignoreCase) == 0;
+        }
+        char ca = a.charAt(ai);
+        char cb = b.charAt(bi);
+        if (ignoreCase) {
+            ca = Character.toUpperCase(ca);
+            cb = Character.toUpperCase(cb);
+        }
+        return ca == cb;
+    }
+
     public int compareString(String a, String b, boolean ignoreCase) {
         if (collator == null) {
             if (ignoreCase) {

h2/src/test/org/h2/test/todo/supportTemplates.txt

@@ -32,7 +32,8 @@ I am sorry to say that, but it looks like a corruption problem. I am very intere
 - The second workarounds is: delete the index.db file (it is re-created automatically) and try again. Does it work when you do this?
 - The third workarounds is: use the tool org.h2.tools.Recover to create the SQL script file, and then re-create the database using this script. Does it work when you do this?
 - Do you use any settings or special features (for example, the setting LOG=0, or two phase commit, linked tables, cache settings)?
-- On what operating system, file system, and virtual machine?
+- Is the application multi-threaded?
+- On what operating system, file system, and virtual machine (java -version)?
 - How big is the database?
 - Is the database usually closed normally, or is process terminated forcefully or the computer switched off?
 - Is it possible to reproduce this problem using a fresh database (sometimes, or always)?