--no commit message

--no commit message

h2/src/docsrc/help/help.csv

@@ -391,7 +391,8 @@ When defining a function alias with source code, the Sun javac is compiler
 is used if the tools.jar is in the classpath. If not, javac is run as a separate process.
 Only the source code is stored in the database; the class is compiled each time
 the database is re-opened. Source code is usually passed
-as dollar quoted text to avoid escaping problems.
+as dollar quoted text to avoid escaping problems. If import statements are used,
+then the tag @CODE must be added before the method.
 
 If the first parameter of the Java function is a java.sql.Connection, then a
 connection to the database is provided. This connection must not be closed.

h2/src/docsrc/html/features.html

@@ -282,7 +282,7 @@ encrypted using AES-256 and XTEA encryption algorithms
 <td class="compareY">Yes</td>
 <td class="compareN">No</td>
 <td class="compareN">No</td>
-<td class="compareN">No</td>
+<td class="compareY">Yes</td>
 <td class="compareY">Yes</td>
 </tr><tr>
 <td>Role Based Security</td>

h2/src/docsrc/html/history.html

@@ -71,7 +71,7 @@ Some think Java is too slow for low level operations,
 but this is no longer true. Garbage collection for example is
 now faster than manual memory management.
 </p><p>
-Developing Java code is faster than C or C++ code. When using Java,
+Developing Java code is faster than developing C or C++ code. When using Java,
 most time can be spent on improving the algorithms instead of
 porting the code to different platforms or doing memory management.
 Features such as Unicode and network libraries are already built-in.

h2/src/docsrc/html/mainWeb.html

@@ -140,7 +140,7 @@ Welcome to H2, the Java SQL database. The main features of H2 are:
         <td class="compareY">Yes</td>
         <td class="compareN">No</td>
         <td class="compareN">No</td>
-        <td class="compareN">No</td>
+        <td class="compareY">Yes</td>
         <td class="compareY">Yes</td>
         </tr><tr>
         <td>Footprint (jar/dll size)</td>

h2/src/docsrc/html/roadmap.html

@@ -468,6 +468,7 @@ See also <a href="build.html#providing_patches">Providing Patches</a>.
 </li><li>Maybe reject join without "on" (except natural join).
 </li><li>Cluster: support load balance with values for each server / auto detect.
 </li><li>Implement GiST (Generalized Search Tree for Secondary Storage).
+</li><li>Function to read a number of bytes/characters from an BLOB or CLOB.
 </li></ul>
 
 <h2>Not Planned</h2>

h2/src/main/org/h2/compress/CompressLZF.java

@@ -42,7 +42,7 @@ package org.h2.compress;
  * </p>
  * <ul>
  * <li>Each instance should be used by a single thread only.</li>
- * <li>The data buffers must be smaller than 2^31.</li>
+ * <li>The data buffers should be smaller than 1 GB.</li>
  * <li>For performance reasons, safety checks on expansion are omitted.</li>
  * <li>Invalid compressed data can cause an ArrayIndexOutOfBoundsException.</li>
  * </ul>

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

-CREATE FUNCTION name ( argName ] type [ { DEFAULT | = } defaultExpression ] [, ...] ] )
-[ RETURNS type ]
-{ LANGUAGE languageName | IMMUTABLE | STABLE
-| VOLATILE | CALLED ON NULL INPUT | RETURNS NULL ON NULL INPUT
-| STRICT | COST executionCost | ROWS resultRows
-
-IMMUTABLE cannot modify the database and always returns the same result
-
-STABLE cannot modify the database and within a single table scan it will consistently
-return the same result
-
-VOLATILE value can change
-
-CALLED ON NULL INPUT
-RETURNS NULL ON NULL INPUT or STRICT
-
-CREATE FUNCTION add(integer, integer) RETURNS integer
-    AS 'select $1 + $2;'
-    LANGUAGE SQL
-    IMMUTABLE
-    RETURNS NULL ON NULL INPUT;
-
-CREATE OR REPLACE FUNCTION increment(i integer) RETURNS integer AS $$
-        BEGIN
-                RETURN i + 1;
-        END;
-$$ LANGUAGE ...;
-
-create alias newFunctionAliasName [ DETERMINISTIC ]
-as
-FOR classAndMethodName
-

h2/src/test/org/h2/test/todo/tools.sql

@@ -8,3 +8,24 @@
 -- update all rows in all tables
 select 'update ' || table_schema || '.' || table_name || ' set ' || column_name || '=' || column_name || ';'
 from information_schema.columns where ORDINAL_POSITION = 1 and table_schema <> 'INFORMATION_SCHEMA';
+
+-- read the first few bytes from a BLOB
+drop table test;
+drop alias first_bytes;
+create alias first_bytes as $$
+import java.io.*;
+@CODE
+byte[] firstBytes(InputStream in, int len) throws IOException {
+    try {
+        byte[] data = new byte[len];
+        DataInputStream din = new DataInputStream(in);
+        din.readFully(data, 0, len);
+        return data;
+    } finally {
+        in.close();
+    }
+}
+$$;
+create table test(data blob);
+insert into test values('010203040506070809');
+select first_bytes(data, 3) from test;