Parse CHARINDEX(), GETDATE(), and LEN() only in SQL Server compatibility mode

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

@@ -240,12 +240,8 @@ 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
-        addFunction("CHARINDEX", LOCATE, VAR_ARGS, Value.INT);
         // same as LOCATE with 2 arguments
         addFunction("POSITION", LOCATE, 2, Value.INT);
         addFunction("INSTR", INSTR, VAR_ARGS, Value.INT);
@@ -293,9 +289,6 @@ public class Function extends Expression implements FunctionCall {
         addFunction("TO_TIMESTAMP", TO_TIMESTAMP, VAR_ARGS, Value.TIMESTAMP);
         addFunction("ADD_MONTHS", ADD_MONTHS, 2, Value.TIMESTAMP);
         addFunction("TO_TIMESTAMP_TZ", TO_TIMESTAMP_TZ, VAR_ARGS, Value.TIMESTAMP_TZ);
-        // alias for MSSQLServer
-        addFunctionNotDeterministic("GETDATE", CURDATE,
-                0, Value.DATE);
         addFunctionNotDeterministic("CURRENT_TIME", CURRENT_TIME,
                 VAR_ARGS, Value.TIME);
         addFunctionNotDeterministic("LOCALTIME", CURRENT_TIME,

h2/src/main/org/h2/mode/FunctionsMSSQLServer.java

@@ -19,6 +19,9 @@ public final class FunctionsMSSQLServer extends FunctionsBase {
     private static final HashMap<String, FunctionInfo> FUNCTIONS = new HashMap<>();
 
     static {
+        copyFunction(FUNCTIONS, "LOCATE", "CHARINDEX");
+        copyFunction(FUNCTIONS, "CURRENT_DATE", "GETDATE");
+        copyFunction(FUNCTIONS, "LENGTH", "LEN");
         copyFunction(FUNCTIONS, "RANDOM_UUID", "NEWID");
     }
 

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

@@ -9,8 +9,23 @@ create memory table test(id int primary key, name varchar(255));
 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
+select length(null) en, length('This has 17 chars') e_17 from test;
+> EN   E_17
+> ---- ----
+> null 17
+> rows: 1
\ No newline at end of file
+
+SELECT LEN(NULL);
+> exception FUNCTION_NOT_FOUND_1
+
+SET MODE MSSQLServer;
+> ok
+
+select len(null) en, len('MSSQLServer uses the len keyword') e_32 from test;
+> EN   E_32
+> ---- ----
+> null 32
+> rows: 1
+
+SET MODE Regular;
+> ok
\ No newline at end of file

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

@@ -20,3 +20,18 @@ select locate('World', 'Hello World') e7, locate('hi', 'abchihihi', 2) e3 from t
 > -- --
 > 7  4
 > rows: 1
+
+SELECT CHARINDEX('test', 'test');
+> exception FUNCTION_NOT_FOUND_1
+
+SET MODE MSSQLServer;
+> ok
+
+select charindex('World', 'Hello World') e7, charindex('hi', 'abchihihi', 2) e3 from test;
+> E7 E3
+> -- --
+> 7  4
+> rows: 1
+
+SET MODE Regular;
+> ok

h2/src/test/org/h2/test/scripts/functions/timeanddate/current_date.sql

@@ -14,3 +14,15 @@ select length(curdate()) c1, length(current_date()) c2, substring(curdate(), 5,
 > -- -- --
 > 10 10 -
 > rows: 1
+
+SELECT GETDATE();
+> exception FUNCTION_NOT_FOUND_1
+
+SET MODE MSSQLServer;
+> ok
+
+SELECT CURRENT_DATE = GETDATE();
+>> TRUE
+
+SET MODE Regular;
+> ok
\ No newline at end of file