@Test
public void testUDF() throws Exception {
String ddl =
"CREATE VIRTUAL FUNCTION SourceFunc(flag boolean, msg varchar) RETURNS varchar "
+ "OPTIONS(CATEGORY 'misc', DETERMINISM 'DETERMINISTIC', "
+ "\"NULL-ON-NULL\" 'true', JAVA_CLASS 'foo', JAVA_METHOD 'bar', RANDOM 'any', UUID 'x')";
Schema s = helpParse(ddl, "model").getSchema();
FunctionMethod fm = s.getFunction("x");
assertNotNull(fm);
assertEquals("string", fm.getOutputParameter().getType());
assertEquals(FunctionMethod.PushDown.CAN_PUSHDOWN, fm.getPushdown());
assertEquals(2, fm.getInputParameterCount());
assertEquals("flag", fm.getInputParameters().get(0).getName());
assertEquals("boolean", fm.getInputParameters().get(0).getType());
assertEquals("msg", fm.getInputParameters().get(1).getName());
assertEquals("string", fm.getInputParameters().get(1).getType());
assertFalse(fm.getInputParameters().get(1).isVarArg());
assertEquals(FunctionMethod.Determinism.DETERMINISTIC, fm.getDeterminism());
assertEquals("misc", fm.getCategory());
assertEquals(true, fm.isNullOnNull());
assertEquals("foo", fm.getInvocationClass());
assertEquals("bar", fm.getInvocationMethod());
assertEquals("any", fm.getProperties().get("RANDOM"));
}
private void visit(FunctionMethod function) {
if (this.filter != null && !filter.matcher(function.getName()).matches()) {
return;
}
append(CREATE).append(SPACE);
if (function.getPushdown().equals(FunctionMethod.PushDown.MUST_PUSHDOWN)) {
append(FOREIGN);
} else {
append(VIRTUAL);
}
append(SPACE)
.append(FUNCTION)
.append(SPACE)
.append(SQLStringVisitor.escapeSinglePart(function.getName()));
append(LPAREN);
boolean first = true;
for (FunctionParameter fp : function.getInputParameters()) {
if (first) {
first = false;
} else {
append(COMMA).append(SPACE);
}
visit(fp);
}
append(RPAREN);
append(SPACE).append(RETURNS);
appendOptions(function.getOutputParameter());
append(SPACE);
append(function.getOutputParameter().getType());
// options
String options = buildFunctionOptions(function);
if (!options.isEmpty()) {
append(NEWLINE).append(OPTIONS).append(SPACE).append(LPAREN).append(options).append(RPAREN);
}
/*if (function.getDefinition() != null) {
append(NEWLINE).append(SQLConstants.Reserved.AS).append(NEWLINE);
append(function.getDefinition());
}*/
append(SQLConstants.Tokens.SEMICOLON);
}
@Test
public void testPushdownFunctionNoArgs() throws Exception {
String ddl =
"CREATE FOREIGN FUNCTION SourceFunc() RETURNS integer OPTIONS (UUID 'hello world')";
Schema s = helpParse(ddl, "model").getSchema();
FunctionMethod fm = s.getFunction("hello world");
assertNotNull(fm);
assertEquals("integer", fm.getOutputParameter().getType());
assertEquals(FunctionMethod.PushDown.MUST_PUSHDOWN, fm.getPushdown());
}
@Test
public void testUDAggregate() throws Exception {
String ddl =
"CREATE VIRTUAL FUNCTION SourceFunc(flag boolean, msg varchar) RETURNS varchar "
+ "OPTIONS(CATEGORY 'misc', AGGREGATE 'true', \"allows-distinct\" 'true', UUID 'y')";
Schema s = helpParse(ddl, "model").getSchema();
FunctionMethod fm = s.getFunction("y");
assertNotNull(fm);
assertEquals("string", fm.getOutputParameter().getType());
assertEquals(FunctionMethod.PushDown.CAN_PUSHDOWN, fm.getPushdown());
assertEquals(2, fm.getInputParameterCount());
assertEquals("flag", fm.getInputParameters().get(0).getName());
assertEquals("boolean", fm.getInputParameters().get(0).getType());
assertEquals("msg", fm.getInputParameters().get(1).getName());
assertEquals("string", fm.getInputParameters().get(1).getType());
assertFalse(fm.getInputParameters().get(1).isVarArg());
assertNotNull(fm.getAggregateAttributes());
assertTrue(fm.getAggregateAttributes().allowsDistinct());
assertEquals(FunctionMethod.Determinism.DETERMINISTIC, fm.getDeterminism());
assertEquals("misc", fm.getCategory());
assertFalse(fm.isNullOnNull());
}
