Merge pull request #1289 from migaman/master

Add Function "LEN" #1196

h2/src/docsrc/html/changelog.html

@@ -21,6 +21,8 @@ Change Log
 
 <h2>Next Version (unreleased)</h2>
 <ul>
+<li>Issue #1196: Feature request for MS SQL Server Compatibility Mode
+</li>
 <li>Issue #1177: Resource leak in Recover tool
 </li>
 <li>PR #1183: Improve concurrency of connection pool with wait-free implement

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

@@ -239,6 +239,8 @@ public class Function extends Expression implements FunctionCall {
         addFunction("LCASE", LCASE, 1, Value.STRING);
         addFunction("LEFT", LEFT, 2, Value.STRING);
         addFunction("LENGTH", LENGTH, 1, Value.LONG);
+        // alias for MSSQLServer
+        addFunction("LEN", LENGTH, 1, Value.LONG);
         // 2 or 3 arguments
         addFunction("LOCATE", LOCATE, VAR_ARGS, Value.INT);
         // alias for MSSQLServer

h2/src/test/org/h2/test/scripts/functions/string/length.sql

@@ -2,3 +2,15 @@
 -- and the EPL 1.0 (http://h2database.com/html/license.html).
 -- Initial Developer: H2 Group
 --
+
+create memory table test(id int primary key, name varchar(255));
+> ok
+
+insert into test values(1, 'Hello');
+> update count: 1
+
+select length(null) en, len(null) en2, length('This has 17 chars') e_17, len('MSSQLServer uses the len keyword') e_32 from test;
+> EN   EN2  E_17 E_32
+> ---- ---- ---- ----
+> null null 17   32
+> rows: 1
\ No newline at end of file