From c10493435ef924d867d679a96607ce2bb3864767 Mon Sep 17 00:00:00 2001
From: Sanne Grinovero <sanne@hibernate.org>
Date: Wed, 9 Jun 2021 15:05:19 +0100
Subject: [PATCH] HHH-14667 Skip loading all keywords from the DB when keyword
 auto-quoting is disabled

---
 .../engine/jdbc/env/spi/IdentifierHelperBuilder.java      | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/hibernate-core/src/main/java/org/hibernate/engine/jdbc/env/spi/IdentifierHelperBuilder.java b/hibernate-core/src/main/java/org/hibernate/engine/jdbc/env/spi/IdentifierHelperBuilder.java
index 0f74afd8f3..74de34f772 100644
--- a/hibernate-core/src/main/java/org/hibernate/engine/jdbc/env/spi/IdentifierHelperBuilder.java
+++ b/hibernate-core/src/main/java/org/hibernate/engine/jdbc/env/spi/IdentifierHelperBuilder.java
@@ -61,6 +61,10 @@ public class IdentifierHelperBuilder {
 			return;
 		}
 
+		//Important optimisation: skip loading all keywords from the DB when autoQuoteKeywords is disabled
+		if ( autoQuoteKeywords == false ) {
+			return;
+		}
 		this.reservedWords.addAll( parseKeywords( metaData.getSQLKeywords() ) );
 	}
 
@@ -176,6 +180,10 @@ public class IdentifierHelperBuilder {
 	}
 
 	public void applyReservedWords(Set<String> words) {
+		//No use when autoQuoteKeywords is disabled
+		if ( autoQuoteKeywords == false ) {
+			return;
+		}
 		this.reservedWords.addAll( words );
 	}