fix: cherry-pick several udf fixes

ci/scripts/build-other.sh

@@ -11,6 +11,7 @@ cd java
 mvn -B package -Dmaven.test.skip=true
 mvn -B install -Dmaven.test.skip=true --pl java-binding-integration-test --am
 mvn dependency:copy-dependencies --no-transfer-progress --pl java-binding-integration-test
+mvn -B test --pl udf
 cd ..
 
 echo "--- Build rust binary for java binding integration test"

e2e_test/udf/test.py

@@ -84,6 +84,16 @@ def hex_to_dec(hex: Optional[str]) -> Optional[Decimal]:
     return dec
 
 
+@udf(input_types=["FLOAT8"], result_type="DECIMAL")
+def float_to_decimal(f: float) -> Decimal:
+    return Decimal(f)
+
+
+@udf(input_types=["DECIMAL", "DECIMAL"], result_type="DECIMAL")
+def decimal_add(a: Decimal, b: Decimal) -> Decimal:
+    return a + b
+
+
 @udf(input_types=["VARCHAR[]", "INT"], result_type="VARCHAR")
 def array_access(list: List[str], idx: int) -> Optional[str]:
     if idx == 0 or idx > len(list):
@@ -212,6 +222,8 @@ def return_all_arrays(
     server.add_function(split)
     server.add_function(extract_tcp_info)
     server.add_function(hex_to_dec)
+    server.add_function(float_to_decimal)
+    server.add_function(decimal_add)
     server.add_function(array_access)
     server.add_function(jsonb_access)
     server.add_function(jsonb_concat)

e2e_test/udf/udf.slt

@@ -39,9 +39,15 @@ create function series(int) returns table (x int) as series using link 'http://l
 statement ok
 create function split(varchar) returns table (word varchar, length int) as split using link 'http://localhost:8815';
 
+statement ok
+create function float_to_decimal(float8) returns decimal as float_to_decimal using link 'http://localhost:8815';
+
 statement ok
 create function hex_to_dec(varchar) returns decimal as hex_to_dec using link 'http://localhost:8815';
 
+statement ok
+create function decimal_add(decimal, decimal) returns decimal as decimal_add using link 'http://localhost:8815';
+
 statement ok
 create function array_access(varchar[], int) returns varchar as array_access using link 'http://localhost:8815';
 
@@ -72,7 +78,9 @@ query TTTTT rowsort
 show functions
 ----
 array_access character varying[], integer character varying (empty) http://localhost:8815
+decimal_add numeric, numeric numeric (empty) http://localhost:8815
 extract_tcp_info bytea struct<src_ip character varying, dst_ip character varying, src_port smallint, dst_port smallint> (empty) http://localhost:8815
+float_to_decimal double precision numeric (empty) http://localhost:8815
 gcd integer, integer integer (empty) http://localhost:8815
 gcd integer, integer, integer integer (empty) http://localhost:8815
 hex_to_dec character varying numeric (empty) http://localhost:8815
@@ -106,6 +114,16 @@ select hex_to_dec('000000000000000000000000000000000000000000c0f6346334241a61f90
 ----
 233276425899864771438119478
 
+query I
+select float_to_decimal('-1e-10'::float8);
+----
+-0.0000000001000000000000000036
+
+query R
+select decimal_add(1.11, 2.22);
+----
+3.33
+
 query T
 select array_access(ARRAY['a', 'b', 'c'], 2);
 ----
@@ -142,7 +160,7 @@ select (return_all(
     1 ::bigint,
     1 ::float4,
     1 ::float8,
-    1234567890123456789012345678 ::decimal,
+    12345678901234567890.12345678 ::decimal,
     date '2023-06-01',
     time '01:02:03.456789',
     timestamp '2023-06-01 01:02:03.456789',
@@ -153,7 +171,7 @@ select (return_all(
     row(1, 2)::struct<f1 int, f2 int>
 )).*;
 ----
-t 1 1 1 1 1 1234567890123456789012345678 2023-06-01 01:02:03.456789 2023-06-01 01:02:03.456789 1 mon 2 days 00:00:03 string \x6279746573 {"key": 1} (1,2)
+t 1 1 1 1 1 12345678901234567890.12345678 2023-06-01 01:02:03.456789 2023-06-01 01:02:03.456789 1 mon 2 days 00:00:03 string \x6279746573 {"key": 1} (1,2)
 
 query T
 select (return_all_arrays(
@@ -163,7 +181,7 @@ select (return_all_arrays(
     array[null, 1 ::bigint],
     array[null, 1 ::float4],
     array[null, 1 ::float8],
-    array[null, 1234567890123456789012345678 ::decimal],
+    array[null, 12345678901234567890.12345678 ::decimal],
     array[null, date '2023-06-01'],
     array[null, time '01:02:03.456789'],
     array[null, timestamp '2023-06-01 01:02:03.456789'],
@@ -174,7 +192,29 @@ select (return_all_arrays(
     array[null, row(1, 2)::struct<f1 int, f2 int>]
 )).*;
 ----
-{NULL,t} {NULL,1} {NULL,1} {NULL,1} {NULL,1} {NULL,1} {NULL,1234567890123456789012345678} {NULL,2023-06-01} {NULL,01:02:03.456789} {NULL,"2023-06-01 01:02:03.456789"} {NULL,"1 mon 2 days 00:00:03"} {NULL,string} {NULL,"\\x6279746573"} {NULL,"{\"key\": 1}"} {NULL,"(1,2)"}
+{NULL,t} {NULL,1} {NULL,1} {NULL,1} {NULL,1} {NULL,1} {NULL,12345678901234567890.12345678} {NULL,2023-06-01} {NULL,01:02:03.456789} {NULL,"2023-06-01 01:02:03.456789"} {NULL,"1 mon 2 days 00:00:03"} {NULL,string} {NULL,"\\x6279746573"} {NULL,"{\"key\": 1}"} {NULL,"(1,2)"}
+
+# test large string output
+query I
+select length((return_all(
+    null::boolean,
+    null::smallint,
+    null::int,
+    null::bigint,
+    null::float4,
+    null::float8,
+    null::decimal,
+    null::date,
+    null::time,
+    null::timestamp,
+    null::interval,
+    repeat('a', 100000)::varchar,
+    repeat('a', 100000)::bytea,
+    null::jsonb,
+    null::struct<f1 int, f2 int>
+)).varchar);
+----
+100000
 
 query I
 select series(5);
@@ -312,9 +352,15 @@ drop function series;
 statement ok
 drop function split;
 
+statement ok
+drop function float_to_decimal;
+
 statement ok
 drop function hex_to_dec;
 
+statement ok
+drop function decimal_add;
+
 statement ok
 drop function array_access;
 

java/udf-example/pom.xml

@@ -31,7 +31,7 @@
     <dependency>
       <groupId>com.risingwave</groupId>
       <artifactId>risingwave-udf</artifactId>
-      <version>0.1.1-SNAPSHOT</version>
+      <version>0.1.3-SNAPSHOT</version>
     </dependency>
     <dependency>
       <groupId>com.google.code.gson</groupId>

java/udf-example/src/main/java/com/example/UdfExample.java

@@ -35,11 +35,13 @@ public class UdfExample {
     public static void main(String[] args) throws IOException {
         try (var server = new UdfServer("0.0.0.0", 8815)) {
             server.addFunction("int_42", new Int42());
+            server.addFunction("float_to_decimal", new FloatToDecimal());
             server.addFunction("sleep", new Sleep());
             server.addFunction("gcd", new Gcd());
             server.addFunction("gcd3", new Gcd3());
             server.addFunction("extract_tcp_info", new ExtractTcpInfo());
             server.addFunction("hex_to_dec", new HexToDec());
+            server.addFunction("decimal_add", new DecimalAdd());
             server.addFunction("array_access", new ArrayAccess());
             server.addFunction("jsonb_access", new JsonbAccess());
             server.addFunction("jsonb_concat", new JsonbConcat());
@@ -63,6 +65,12 @@ public int eval() {
         }
     }
 
+    public static class FloatToDecimal implements ScalarFunction {
+        public BigDecimal eval(Double f) {
+            return new BigDecimal(f);
+        }
+    }
+
     public static class Sleep implements ScalarFunction {
         public int eval(int x) {
             try {
@@ -126,6 +134,12 @@ public BigDecimal eval(String hex) {
         }
     }
 
+    public static class DecimalAdd implements ScalarFunction {
+        public BigDecimal eval(BigDecimal a, BigDecimal b) {
+            return a.add(b);
+        }
+    }
+
     public static class ArrayAccess implements ScalarFunction {
         public String eval(String[] array, int index) {
             return array[index - 1];

java/udf/CHANGELOG.md

@@ -7,7 +7,20 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
-## [0.1.1] - 2023-11-28
+## [0.1.3] - 2023-12-06
+
+### Fixed
+
+- Fix decimal type output.
+
+## [0.1.2] - 2023-12-04
+
+### Fixed
+
+- Fix index-out-of-bound error when string or string list is large.
+- Fix memory leak.
+
+## [0.1.1] - 2023-12-03
 
 ### Added
 
@@ -17,6 +30,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - Bump Arrow version to 14.
 
+### Fixed
+
+- Fix unconstrained decimal type.
+
 ## [0.1.0] - 2023-09-01
 
 - Initial release.

java/udf/pom.xml

@@ -6,7 +6,7 @@
   <groupId>com.risingwave</groupId>
   <artifactId>risingwave-udf</artifactId>
   <packaging>jar</packaging>
-  <version>0.1.1-SNAPSHOT</version>
+  <version>0.1.3-SNAPSHOT</version>
 
   <parent>
     <artifactId>risingwave-java-root</artifactId>

java/udf/src/main/java/com/risingwave/functions/ScalarFunctionBatch.java

@@ -27,9 +27,8 @@ class ScalarFunctionBatch extends UserDefinedFunctionBatch {
     MethodHandle methodHandle;
     Function<Object, Object>[] processInputs;
 
-    ScalarFunctionBatch(ScalarFunction function, BufferAllocator allocator) {
+    ScalarFunctionBatch(ScalarFunction function) {
         this.function = function;
-        this.allocator = allocator;
         var method = Reflection.getEvalMethod(function);
         this.methodHandle = Reflection.getMethodHandle(method);
         this.inputSchema = TypeUtils.methodToInputSchema(method);
@@ -38,7 +37,7 @@ class ScalarFunctionBatch extends UserDefinedFunctionBatch {
     }
 
     @Override
-    Iterator<VectorSchemaRoot> evalBatch(VectorSchemaRoot batch) {
+    Iterator<VectorSchemaRoot> evalBatch(VectorSchemaRoot batch, BufferAllocator allocator) {
         var row = new Object[batch.getSchema().getFields().size() + 1];
         row[0] = this.function;
         var outputValues = new Object[batch.getRowCount()];
@@ -55,7 +54,7 @@ Iterator<VectorSchemaRoot> evalBatch(VectorSchemaRoot batch) {
         }
         var outputVector =
                 TypeUtils.createVector(
-                        this.outputSchema.getFields().get(0), this.allocator, outputValues);
+                        this.outputSchema.getFields().get(0), allocator, outputValues);
         var outputBatch = VectorSchemaRoot.of(outputVector);
         return Collections.singleton(outputBatch).iterator();
     }

java/udf/src/main/java/com/risingwave/functions/TableFunctionBatch.java

@@ -28,9 +28,8 @@ class TableFunctionBatch extends UserDefinedFunctionBatch {
     Function<Object, Object>[] processInputs;
     int chunkSize = 1024;
 
-    TableFunctionBatch(TableFunction function, BufferAllocator allocator) {
+    TableFunctionBatch(TableFunction function) {
         this.function = function;
-        this.allocator = allocator;
         var method = Reflection.getEvalMethod(function);
         this.methodHandle = Reflection.getMethodHandle(method);
         this.inputSchema = TypeUtils.methodToInputSchema(method);
@@ -39,7 +38,7 @@ class TableFunctionBatch extends UserDefinedFunctionBatch {
     }
 
     @Override
-    Iterator<VectorSchemaRoot> evalBatch(VectorSchemaRoot batch) {
+    Iterator<VectorSchemaRoot> evalBatch(VectorSchemaRoot batch, BufferAllocator allocator) {
         var outputs = new ArrayList<VectorSchemaRoot>();
         var row = new Object[batch.getSchema().getFields().size() + 1];
         row[0] = this.function;
@@ -49,10 +48,9 @@ Iterator<VectorSchemaRoot> evalBatch(VectorSchemaRoot batch) {
                 () -> {
                     var fields = this.outputSchema.getFields();
                     var indexVector =
-                            TypeUtils.createVector(
-                                    fields.get(0), this.allocator, indexes.toArray());
+                            TypeUtils.createVector(fields.get(0), allocator, indexes.toArray());
                     var valueVector =
-                            TypeUtils.createVector(fields.get(1), this.allocator, values.toArray());
+                            TypeUtils.createVector(fields.get(1), allocator, values.toArray());
                     indexes.clear();
                     values.clear();
                     var outputBatch = VectorSchemaRoot.of(indexVector, valueVector);