From d30784526a6c0b864d33c0fc321130ba5fcaacf0 Mon Sep 17 00:00:00 2001
From: Lukas Eder <lukas.eder@gmail.com>
Date: Thu, 10 Dec 2020 16:29:34 +0100
Subject: [PATCH] [jOOQ/jOOQ#11099] Cache CursorRecordInitialiser instance

---
 jOOQ/src/main/java/org/jooq/impl/CursorImpl.java | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/jOOQ/src/main/java/org/jooq/impl/CursorImpl.java b/jOOQ/src/main/java/org/jooq/impl/CursorImpl.java
index e23a8dfef9..71210440f6 100644
--- a/jOOQ/src/main/java/org/jooq/impl/CursorImpl.java
+++ b/jOOQ/src/main/java/org/jooq/impl/CursorImpl.java
@@ -1551,7 +1551,7 @@ final class CursorImpl<R extends Record> extends AbstractCursor<R> implements Cu
         /**
          * The (potentially) pre-fetched next record
          */
-        private R next;
+        private R                             next;
 
         /**
          * Whether the underlying {@link ResultSet} has a next record. This
@@ -1562,7 +1562,12 @@ final class CursorImpl<R extends Record> extends AbstractCursor<R> implements Cu
          * <li>false: there aren't any next records</li>
          * </ul>
          */
-        private Boolean hasNext;
+        private Boolean                       hasNext;
+
+        /**
+         * [#11099] Cache this instance for the entire cursor.
+         */
+        private final CursorRecordInitialiser initialiser = new CursorRecordInitialiser(fields, 0);
 
         @Override
         public final boolean hasNext() {
@@ -1597,7 +1602,7 @@ final class CursorImpl<R extends Record> extends AbstractCursor<R> implements Cu
             try {
                 if (!isClosed && rs.next()) {
                     record = Tools.newRecord(true, (F0<AbstractRecord>) factory, ((DefaultExecuteContext) ctx).originalConfiguration())
-                                  .operate(new CursorRecordInitialiser(fields, 0));
+                                  .operate(initialiser.reset());
 
                     rows++;
                 }
@@ -1643,6 +1648,11 @@ final class CursorImpl<R extends Record> extends AbstractCursor<R> implements Cu
                 this.offset = offset;
             }
 
+            CursorRecordInitialiser reset() {
+                offset = 0;
+                return this;
+            }
+
             @Override
             public AbstractRecord operate(AbstractRecord record) throws SQLException {
                 ctx.record(record);