diff --git a/spring-data-jpa/src/main/antlr4/org/springframework/data/jpa/repository/query/Hql.g4 b/spring-data-jpa/src/main/antlr4/org/springframework/data/jpa/repository/query/Hql.g4
index 568f5a235..c429687b7 100644
--- a/spring-data-jpa/src/main/antlr4/org/springframework/data/jpa/repository/query/Hql.g4
+++ b/spring-data-jpa/src/main/antlr4/org/springframework/data/jpa/repository/query/Hql.g4
@@ -692,7 +692,7 @@ reservedWord
 	| FOR
 	| FORMAT
 	| FROM
-//	| FULL
+	| FULL
 	| FUNCTION
 	| GROUP
 	| GROUPS
@@ -704,7 +704,7 @@ reservedWord
 	| IN
 	| INDEX
 	| INDICES
-//	| INNER
+	| INNER
 	| INSERT
 	| INSTANT
 	| INTERSECT
@@ -714,7 +714,7 @@ reservedWord
 	| KEY
 	| LAST
 	| LEADING
-//	| LEFT
+	| LEFT
 	| LIKE
 	| LIMIT
 	| LIST
@@ -752,7 +752,7 @@ reservedWord
 	| OR
 	| ORDER
 	| OTHERS
-//	| OUTER
+	| OUTER
 	| OVER
 	| OVERFLOW
 	| OVERLAY
@@ -765,7 +765,7 @@ reservedWord
 	| QUARTER
 	| RANGE
 	| RESPECT
-//	| RIGHT
+	| RIGHT
 	| ROLLUP
 	| ROW
 	| ROWS
diff --git a/spring-data-jpa/src/main/antlr4/org/springframework/data/jpa/repository/query/Jpql.g4 b/spring-data-jpa/src/main/antlr4/org/springframework/data/jpa/repository/query/Jpql.g4
index 2b5cc7ca4..9bad5f4c7 100644
--- a/spring-data-jpa/src/main/antlr4/org/springframework/data/jpa/repository/query/Jpql.g4
+++ b/spring-data-jpa/src/main/antlr4/org/springframework/data/jpa/repository/query/Jpql.g4
@@ -599,6 +599,9 @@ identification_variable
     | ORDER // Gap in the spec requires supporting 'Order' as an entity name
     | COUNT // Gap in the spec requires supporting 'count' as a possible name
     | KEY // Gap in the sepc requires supported 'key' as a possible name
+    | LEFT
+    | INNER
+    | OUTER
     ;
 
 constructor_name
diff --git a/spring-data-jpa/src/test/java/org/springframework/data/jpa/repository/query/HqlQueryTransformerTests.java b/spring-data-jpa/src/test/java/org/springframework/data/jpa/repository/query/HqlQueryTransformerTests.java
index 56cb2c042..f70b87540 100644
--- a/spring-data-jpa/src/test/java/org/springframework/data/jpa/repository/query/HqlQueryTransformerTests.java
+++ b/spring-data-jpa/src/test/java/org/springframework/data/jpa/repository/query/HqlQueryTransformerTests.java
@@ -18,9 +18,13 @@ package org.springframework.data.jpa.repository.query;
 import static org.assertj.core.api.Assertions.*;
 
 import java.util.regex.Pattern;
+import java.util.stream.Stream;
 
 import org.assertj.core.api.SoftAssertions;
 import org.junit.jupiter.api.Test;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.Arguments;
+import org.junit.jupiter.params.provider.MethodSource;
 import org.springframework.dao.InvalidDataAccessApiUsageException;
 import org.springframework.data.domain.Sort;
 import org.springframework.data.jpa.domain.JpaSort;
@@ -808,6 +812,30 @@ class HqlQueryTransformerTests {
 				"select count(b) FROM BookError b WHERE portal = :portal");
 	}
 
+	@ParameterizedTest
+	@MethodSource("queriesWithReservedWordsAsIdentifiers") // GH-2864
+	void usingReservedWordAsRelationshipNameShouldWork(String relationshipName, String joinAlias) {
+
+		HqlQueryParser.parseQuery(String.format("""
+				select u
+				from UserAccountEntity u
+				join fetch u.lossInspectorLimitConfiguration lil
+				join fetch u.companyTeam ct
+				where exists (
+					select iu
+					from UserAccountEntity  iu
+					join iu.roles u2r
+					join u2r.role r
+					join r.rights r2r
+					join r2r.%s %s
+					where
+						%s.code = :rightCode
+						and iu = u
+				)
+				and ct.id = :teamId
+					""", relationshipName, joinAlias, joinAlias));
+	}
+
 	@Test // GH-2508
 	void detectAliasWithCastCorrectly() {
 
@@ -819,6 +847,16 @@ class HqlQueryTransformerTests {
 				.isEqualTo("u");
 	}
 
+	static Stream<Arguments> queriesWithReservedWordsAsIdentifiers() {
+
+		return Stream.of( //
+				Arguments.of("right", "rt"), //
+				Arguments.of("left", "lt"), //
+				Arguments.of("outer", "ou"), //
+				Arguments.of("full", "full"), //
+				Arguments.of("inner", "inr"));
+	}
+
 	private void assertCountQuery(String originalQuery, String countQuery) {
 		assertThat(createCountQueryFor(originalQuery)).isEqualTo(countQuery);
 	}
diff --git a/spring-data-jpa/src/test/java/org/springframework/data/jpa/repository/query/JpqlQueryTransformerTests.java b/spring-data-jpa/src/test/java/org/springframework/data/jpa/repository/query/JpqlQueryTransformerTests.java
index d63cbd26d..8ebcfa83e 100644
--- a/spring-data-jpa/src/test/java/org/springframework/data/jpa/repository/query/JpqlQueryTransformerTests.java
+++ b/spring-data-jpa/src/test/java/org/springframework/data/jpa/repository/query/JpqlQueryTransformerTests.java
@@ -18,9 +18,13 @@ package org.springframework.data.jpa.repository.query;
 import static org.assertj.core.api.Assertions.*;
 
 import java.util.regex.Pattern;
+import java.util.stream.Stream;
 
 import org.assertj.core.api.SoftAssertions;
 import org.junit.jupiter.api.Test;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.Arguments;
+import org.junit.jupiter.params.provider.MethodSource;
 import org.springframework.dao.InvalidDataAccessApiUsageException;
 import org.springframework.data.domain.Sort;
 import org.springframework.data.jpa.domain.JpaSort;
@@ -679,6 +683,40 @@ class JpqlQueryTransformerTests {
 		assertThat(alias("select u from User as u left join  u.roles as r")).isEqualTo("u");
 	}
 
+	@ParameterizedTest
+	@MethodSource("queriesWithReservedWordsAsIdentifiers") // GH-2864
+	void usingReservedWordAsRelationshipNameShouldWork(String relationshipName, String joinAlias) {
+
+		JpqlQueryParser.parseQuery(String.format("""
+				select u
+				from UserAccountEntity u
+				join u.lossInspectorLimitConfiguration lil
+				join u.companyTeam ct
+				where exists (
+					select iu
+					from UserAccountEntity  iu
+					join iu.roles u2r
+					join u2r.role r
+					join r.rights r2r
+					join r2r.inner inr
+					where
+						inr.code = :rightCode
+						and iu = u
+				)
+				and ct.id = :teamId
+				""", relationshipName, joinAlias, joinAlias));
+	}
+
+	static Stream<Arguments> queriesWithReservedWordsAsIdentifiers() {
+
+		return Stream.of( //
+				Arguments.of("right", "rt"), //
+				Arguments.of("left", "lt"), //
+				Arguments.of("outer", "ou"), //
+				Arguments.of("full", "full"), //
+				Arguments.of("inner", "inr"));
+	}
+
 	private void assertCountQuery(String originalQuery, String countQuery) {
 		assertThat(createCountQueryFor(originalQuery)).isEqualTo(countQuery);
 	}