diff --git a/spring-jdbc/src/test/java/org/springframework/jdbc/core/simple/JdbcClientIntegrationTests.java b/spring-jdbc/src/test/java/org/springframework/jdbc/core/simple/JdbcClientIntegrationTests.java
index 99daa91494a..a78e31a1f8a 100644
--- a/spring-jdbc/src/test/java/org/springframework/jdbc/core/simple/JdbcClientIntegrationTests.java
+++ b/spring-jdbc/src/test/java/org/springframework/jdbc/core/simple/JdbcClientIntegrationTests.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2024 the original author or authors.
+ * Copyright 2002-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,6 +16,8 @@
 
 package org.springframework.jdbc.core.simple;
 
+import java.util.List;
+
 import org.junit.jupiter.api.AfterEach;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
@@ -143,6 +145,52 @@ class JdbcClientIntegrationTests {
 		assertUser(expectedId, firstName, lastName);
 	}
 
+	@Test  // gh-34768
+	void selectWithReusedNamedParameter() {
+		this.jdbcClient.sql(INSERT_WITH_JDBC_PARAMS).params("John", "John").update();
+		this.jdbcClient.sql(INSERT_WITH_JDBC_PARAMS).params("John", "Smith").update();
+		this.jdbcClient.sql(INSERT_WITH_JDBC_PARAMS).params("Smith", "Smith").update();
+		assertNumUsers(4);
+
+		String sql = """
+				select * from users
+					where
+						first_name in ('Bogus', :name) or
+						last_name in (:name, 'Bogus')
+					order by last_name
+				""";
+
+		List<User> users = this.jdbcClient.sql(sql)
+				.param("name", "John")
+				.query(User.class)
+				.list();
+
+		assertThat(users).containsExactly(new User(2, "John", "John"), new User(3, "John", "Smith"));
+	}
+
+	@Test  // gh-34768
+	void selectWithReusedNamedParameterList() {
+		this.jdbcClient.sql(INSERT_WITH_JDBC_PARAMS).params("John", "John").update();
+		this.jdbcClient.sql(INSERT_WITH_JDBC_PARAMS).params("John", "Smith").update();
+		this.jdbcClient.sql(INSERT_WITH_JDBC_PARAMS).params("Smith", "Smith").update();
+		assertNumUsers(4);
+
+		String sql = """
+				select * from users
+					where
+						first_name in (:names) or
+						last_name in (:names)
+					order by last_name
+				""";
+
+		List<User> users = this.jdbcClient.sql(sql)
+				.param("names", List.of("John", "Bogus"))
+				.query(User.class)
+				.list();
+
+		assertThat(users).containsExactly(new User(2, "John", "John"), new User(3, "John", "Smith"));
+	}
+
 
 	private void assertNumUsers(long count) {
 		long numUsers = this.jdbcClient.sql("select count(id) from users").query(Long.class).single();
diff --git a/spring-r2dbc/src/test/java/org/springframework/r2dbc/core/AbstractDatabaseClientIntegrationTests.java b/spring-r2dbc/src/test/java/org/springframework/r2dbc/core/AbstractDatabaseClientIntegrationTests.java
index 19332ecd403..b6a91fbcf77 100644
--- a/spring-r2dbc/src/test/java/org/springframework/r2dbc/core/AbstractDatabaseClientIntegrationTests.java
+++ b/spring-r2dbc/src/test/java/org/springframework/r2dbc/core/AbstractDatabaseClientIntegrationTests.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2024 the original author or authors.
+ * Copyright 2002-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -211,6 +211,69 @@ abstract class AbstractDatabaseClientIntegrationTests {
 				.verifyComplete();
 	}
 
+	@Test  // gh-34768
+	void executeInsertWithReusedNamedParameter() {
+		DatabaseClient databaseClient = DatabaseClient.create(connectionFactory);
+
+		Lego lego = new Lego(1, 42, "Star Wars", 42);
+
+		databaseClient.sql(() -> "INSERT INTO legoset (id, version, name, manual) VALUES(:id, :number, :name, :number)")
+				.bind("id", lego.id)
+				.bind("name", lego.name)
+				.bind("number", lego.version)
+				.fetch().rowsUpdated()
+				.as(StepVerifier::create)
+				.expectNext(1L)
+				.verifyComplete();
+
+		databaseClient.sql("SELECT * FROM legoset")
+				.mapProperties(Lego.class)
+				.first()
+				.as(StepVerifier::create)
+				.assertNext(actual -> assertThat(actual).isEqualTo(lego))
+				.verifyComplete();
+	}
+
+	@Test  // gh-34768
+	void executeSelectWithReusedNamedParameterList() {
+		DatabaseClient databaseClient = DatabaseClient.create(connectionFactory);
+
+		String insertSql = "INSERT INTO legoset (id, version, name, manual) VALUES(:id, :version, :name, :manual)";
+		String selectSql = "SELECT * FROM legoset WHERE version IN (:numbers) OR manual IN (:numbers)";
+		Lego lego = new Lego(1, 42, "Star Wars", 99);
+
+		databaseClient.sql(insertSql)
+				.bind("id", lego.id)
+				.bind("version", lego.version)
+				.bind("name", lego.name)
+				.bind("manual", lego.manual)
+				.fetch().rowsUpdated()
+				.as(StepVerifier::create)
+				.expectNext(1L)
+				.verifyComplete();
+
+		databaseClient.sql(selectSql)
+				// match version
+				.bind("numbers", List.of(2, 3, lego.version, 4))
+				.mapProperties(Lego.class)
+				.first()
+				.as(StepVerifier::create)
+				.assertNext(actual -> assertThat(actual).isEqualTo(lego))
+				.verifyComplete();
+
+		databaseClient.sql(selectSql)
+				// match manual
+				.bind("numbers", List.of(2, 3, lego.manual, 4))
+				.mapProperties(Lego.class)
+				.first()
+				.as(StepVerifier::create)
+				.assertNext(actual -> assertThat(actual).isEqualTo(lego))
+				.verifyComplete();
+	}
+
+
+	record Lego(int id, Integer version, String name, Integer manual) {
+	}
 
 	record ParameterRecord(int id, String name, Integer manual) {
 	}