HHH-19558: Fixed support of JDBC escape syntax

Author: Stefan-Tri

hibernate-core/src/main/java/org/hibernate/query/sql/internal/SQLQueryParser.java

@@ -89,13 +89,21 @@ protected String substituteBrackets(String sqlQuery) throws QueryException {
 					if (!doubleQuoted && !escaped) {
 						singleQuoted = !singleQuoted;
 					}
-					result.append(ch);
+					if (escaped) {
+						token.append(ch);
+					} else {
+						result.append(ch);
+					}
 					break;
 				case '"':
 					if (!singleQuoted && !escaped) {
 						doubleQuoted = !doubleQuoted;
 					}
-					result.append(ch);
+					if (escaped) {
+						token.append(ch);
+					} else {
+						result.append(ch);
+					}
 					break;
 				case '{':
 					if (!singleQuoted && !doubleQuoted) {

hibernate-core/src/test/java/org/hibernate/orm/test/sql/SQLQueryParserUnitTests.java

@@ -24,6 +24,27 @@
 @SuppressWarnings("JUnitMalformedDeclaration")
 public class SQLQueryParserUnitTests {
 
+	@Test
+	@DomainModel
+	@SessionFactory
+	@RequiresDialect(H2Dialect.class)
+	void testJDBCEscapeSyntaxParsing(SessionFactoryScope scope) {
+		final SessionFactoryImplementor sessionFactory = scope.getSessionFactory();
+		final String sqlQuery = "select id, name from {h-domain}the_table where date = {d '2025-06-18'}";
+
+		final String full = processSqlString( sqlQuery, "my_catalog", "my_schema", sessionFactory );
+		assertThat( full ).contains( "{d '2025-06-18'}" );
+
+		final String catalogOnly = processSqlString( sqlQuery, "my_catalog", null, sessionFactory );
+		assertThat( catalogOnly ).contains( "{d '2025-06-18'}" );
+
+		final String schemaOnly = processSqlString( sqlQuery, null, "my_schema", sessionFactory );
+		assertThat( schemaOnly ).contains( "{d '2025-06-18'}" );
+
+		final String none = processSqlString( sqlQuery, null, null, sessionFactory );
+		assertThat( none ).contains( "{d '2025-06-18'}" );
+	}
+
 	@Test
 	@DomainModel
 	@SessionFactory