HHH-14739 - Implement ILike support

Signed-off-by: Jan Schatteman <jschatte@redhat.com>

hibernate-core/src/main/antlr/org/hibernate/grammars/hql/HqlLexer.g4

@@ -212,6 +212,7 @@ LEAST				: [lL] [eE] [aA] [sS] [tT];
 LEFT				: [lL] [eE] [fF] [tT];
 LENGTH				: [lL] [eE] [nN] [gG] [tT] [hH];
 LIKE				: [lL] [iI] [kK] [eE];
+ILIKE				: [iI] [lL] [iI] [kK] [eE];
 LIMIT				: [lL] [iI] [mM] [iI] [tT];
 LIST				: [lL] [iI] [sS] [tT];
 LN  				: [lL] [nN];

hibernate-core/src/main/antlr/org/hibernate/grammars/hql/HqlParser.g4

@@ -405,10 +405,10 @@ predicate
 	| expression IS (NOT)? EMPTY								# IsEmptyPredicate
 	| expression (NOT)? IN inList								# InPredicate
 	| expression (NOT)? BETWEEN expression AND expression		# BetweenPredicate
-	| expression (NOT)? LIKE expression (likeEscape)?							# LikePredicate
+	| expression (NOT)? (LIKE | ILIKE) expression (likeEscape)?	# LikePredicate
 	| expression comparisonOperator expression					# ComparisonPredicate
 	| EXISTS (ELEMENTS|INDICES) LEFT_PAREN dotIdentifierSequence RIGHT_PAREN	# ExistsCollectionPartPredicate
-	| EXISTS expression															# ExistsPredicate
+	| EXISTSexpression											# ExistsPredicate
 	| expression (NOT)? MEMBER OF path							# MemberOfPredicate
 	| NOT predicate												# NegatedPredicate
 	| predicate AND predicate									# AndPredicate
@@ -973,6 +973,7 @@ identifier
 	| HOUR
 	| ID
 	| IFNULL
+	| ILIKE
 	| IN
 	| INDEX
 	| INDICES

hibernate-core/src/main/java/org/hibernate/query/criteria/HibernateCriteriaBuilder.java

@@ -33,7 +33,6 @@ import javax.persistence.criteria.Subquery;
 import org.hibernate.query.NullPrecedence;
 import org.hibernate.query.SortOrder;
 import org.hibernate.metamodel.model.domain.DomainType;
-import org.hibernate.query.sqm.SqmExpressable;
 import org.hibernate.query.sqm.tree.expression.SqmExpression;
 
 /**
@@ -621,6 +620,18 @@ public interface HibernateCriteriaBuilder extends CriteriaBuilder {
 	@Override
 	JpaPredicate like(Expression<String> x, String pattern, char escapeChar);
 
+	JpaPredicate ilike(Expression<String> x, Expression<String> pattern);
+
+	JpaPredicate ilike(Expression<String> x, String pattern);
+
+	JpaPredicate ilike(Expression<String> x, Expression<String> pattern, Expression<Character> escapeChar);
+
+	JpaPredicate ilike(Expression<String> x, Expression<String> pattern, char escapeChar);
+
+	JpaPredicate ilike(Expression<String> x, String pattern, Expression<Character> escapeChar);
+
+	JpaPredicate ilike(Expression<String> x, String pattern, char escapeChar);
+
 	@Override
 	JpaPredicate notLike(Expression<String> x, Expression<String> pattern);
 
@@ -639,6 +650,18 @@ public interface HibernateCriteriaBuilder extends CriteriaBuilder {
 	@Override
 	JpaPredicate notLike(Expression<String> x, String pattern, char escapeChar);
 
+	JpaPredicate notIlike(Expression<String> x, Expression<String> pattern);
+
+	JpaPredicate notIlike(Expression<String> x, String pattern);
+
+	JpaPredicate notIlike(Expression<String> x, Expression<String> pattern, Expression<Character> escapeChar);
+
+	JpaPredicate notIlike(Expression<String> x, Expression<String> pattern, char escapeChar);
+
+	JpaPredicate notIlike(Expression<String> x, String pattern, Expression<Character> escapeChar);
+
+	JpaPredicate notIlike(Expression<String> x, String pattern, char escapeChar);
+
 	@Override
 	<T> JpaInPredicate<T> in(Expression<? extends T> expression);
 

hibernate-core/src/main/java/org/hibernate/query/hql/internal/SemanticQueryBuilder.java

@@ -1972,12 +1972,15 @@ public class SemanticQueryBuilder<R> extends HqlParserBaseVisitor<Object> implem
 	public SqmPredicate visitLikePredicate(HqlParser.LikePredicateContext ctx) {
 		final boolean negated = ( (TerminalNode) ctx.getChild( 1 ) ).getSymbol().getType() == HqlParser.NOT;
 		final int startIndex = negated ? 3 : 2;
+		final boolean caseSensitive = ( (TerminalNode) ctx.getChild( negated ? 2 : 1 ) ).getSymbol()
+				.getType() == HqlParser.LIKE;
 		if ( ctx.getChildCount() == startIndex + 2 ) {
 			return new SqmLikePredicate(
 					(SqmExpression<?>) ctx.getChild( 0 ).accept( this ),
 					(SqmExpression<?>) ctx.getChild( startIndex ).accept( this ),
 					(SqmExpression<?>) ctx.getChild( startIndex + 1 ).getChild( 1 ).accept( this ),
 					negated,
+					caseSensitive,
 					creationContext.getNodeBuilder()
 			);
 		}
@@ -1986,6 +1989,7 @@ public class SemanticQueryBuilder<R> extends HqlParserBaseVisitor<Object> implem
 					(SqmExpression<?>) ctx.getChild( 0 ).accept( this ),
 					(SqmExpression<?>) ctx.getChild( startIndex ).accept( this ),
 					negated,
+					caseSensitive,
 					creationContext.getNodeBuilder()
 			);
 		}

hibernate-core/src/main/java/org/hibernate/query/sqm/internal/SqmCriteriaNodeBuilder.java

@@ -1970,6 +1970,79 @@ public class SqmCriteriaNodeBuilder implements NodeBuilder, SqmCreationContext {
 		);
 	}
 
+	@Override
+	public SqmPredicate ilike(Expression<String> searchString, Expression<String> pattern) {
+		return new SqmLikePredicate(
+				(SqmExpression) searchString,
+				(SqmExpression) pattern,
+				false,
+				false,
+				this
+		);
+	}
+
+	@Override
+	public SqmPredicate ilike(Expression<String> searchString, String pattern) {
+		return new SqmLikePredicate(
+				(SqmExpression) searchString,
+				value( pattern, (SqmExpression) searchString ),
+				false,
+				false,
+				this
+		);
+	}
+
+	@Override
+	public SqmPredicate ilike(
+			Expression<String> searchString,
+			Expression<String> pattern,
+			Expression<Character> escapeChar) {
+		return new SqmLikePredicate(
+				(SqmExpression) searchString,
+				(SqmExpression) pattern,
+				(SqmExpression) escapeChar,
+				false,
+				false,
+				this
+		);
+	}
+
+	@Override
+	public SqmPredicate ilike(Expression<String> searchString, Expression<String> pattern, char escapeChar) {
+		return new SqmLikePredicate(
+				(SqmExpression) searchString,
+				(SqmExpression) pattern,
+				literal( escapeChar ),
+				false,
+				false,
+				this
+		);
+	}
+
+	@Override
+	public SqmPredicate ilike(Expression<String> searchString, String pattern, Expression<Character> escapeChar) {
+		return new SqmLikePredicate(
+				(SqmExpression) searchString,
+				value( pattern, (SqmExpression) searchString ),
+				(SqmExpression) escapeChar,
+				false,
+				false,
+				this
+		);
+	}
+
+	@Override
+	public SqmPredicate ilike(Expression<String> searchString, String pattern, char escapeChar) {
+		return new SqmLikePredicate(
+				(SqmExpression) searchString,
+				value( pattern, (SqmExpression) searchString ),
+				literal( escapeChar ),
+				false,
+				false,
+				this
+		);
+	}
+
 	@Override
 	public SqmPredicate notLike(Expression<String> x, Expression<String> pattern) {
 		return not( like( x, pattern ) );
@@ -2000,6 +2073,36 @@ public class SqmCriteriaNodeBuilder implements NodeBuilder, SqmCreationContext {
 		return not( like( x, pattern, escapeChar ) );
 	}
 
+	@Override
+	public SqmPredicate notIlike(Expression<String> x, Expression<String> pattern) {
+		return not( ilike( x, pattern ) );
+	}
+
+	@Override
+	public SqmPredicate notIlike(Expression<String> x, String pattern) {
+		return not( ilike( x, pattern ) );
+	}
+
+	@Override
+	public SqmPredicate notIlike(Expression<String> x, Expression<String> pattern, Expression<Character> escapeChar) {
+		return not( ilike( x, pattern, escapeChar ) );
+	}
+
+	@Override
+	public SqmPredicate notIlike(Expression<String> x, Expression<String> pattern, char escapeChar) {
+		return not( ilike( x, pattern, escapeChar ) );
+	}
+
+	@Override
+	public SqmPredicate notIlike(Expression<String> x, String pattern, Expression<Character> escapeChar) {
+		return not( ilike( x, pattern, escapeChar ) );
+	}
+
+	@Override
+	public SqmPredicate notIlike(Expression<String> x, String pattern, char escapeChar) {
+		return not( ilike( x, pattern, escapeChar ) );
+	}
+
 	@Override
 	@SuppressWarnings("unchecked")
 	public <T> SqmInPredicate<T> in(Expression<? extends T> expression) {

hibernate-core/src/main/java/org/hibernate/query/sqm/internal/SqmTreePrinter.java

@@ -838,8 +838,9 @@ public class SqmTreePrinter implements SemanticQueryWalker<Object> {
 
 	@Override
 	public Object visitLikePredicate(SqmLikePredicate predicate) {
+		final String likeType = predicate.isCaseSensitive() ? "like" : "ilike";
 		processStanza(
-				predicate.isNegated() ? "is-not-like" : "is-like",
+				( predicate.isNegated() ? "is-not-" : "is-" ) + likeType,
 				() -> {
 					predicate.getPattern().accept( this );
 					predicate.getMatchExpression().accept( this );

hibernate-core/src/main/java/org/hibernate/query/sqm/sql/BaseSqmToSqlAstConverter.java

@@ -4468,7 +4468,8 @@ public abstract class BaseSqmToSqlAstConverter<T extends Statement> extends Base
 				(Expression) predicate.getMatchExpression().accept( this ),
 				(Expression) predicate.getPattern().accept( this ),
 				escapeExpression,
-				predicate.isNegated()
+				predicate.isNegated(),
+				predicate.isCaseSensitive()
 		);
 	}
 

hibernate-core/src/main/java/org/hibernate/query/sqm/tree/predicate/SqmLikePredicate.java

@@ -17,6 +17,7 @@ public class SqmLikePredicate extends AbstractNegatableSqmPredicate {
 	private final SqmExpression<?> matchExpression;
 	private final SqmExpression<?> pattern;
 	private final SqmExpression<?> escapeCharacter;
+	private final boolean isCaseSensitive;
 
 	public SqmLikePredicate(
 			SqmExpression<?> matchExpression,
@@ -26,17 +27,27 @@ public class SqmLikePredicate extends AbstractNegatableSqmPredicate {
 		this( matchExpression, pattern, escapeCharacter, false, nodeBuilder );
 	}
 
-	@SuppressWarnings("WeakerAccess")
 	public SqmLikePredicate(
 			SqmExpression<?> matchExpression,
 			SqmExpression<?> pattern,
 			SqmExpression<?> escapeCharacter,
 			boolean negated,
 			NodeBuilder nodeBuilder) {
+		this( matchExpression, pattern, escapeCharacter, negated, true, nodeBuilder );
+	}
+
+	public SqmLikePredicate(
+			SqmExpression<?> matchExpression,
+			SqmExpression<?> pattern,
+			SqmExpression<?> escapeCharacter,
+			boolean negated,
+			boolean isCaseSensitive,
+			NodeBuilder nodeBuilder) {
 		super( negated, nodeBuilder );
 		this.matchExpression = matchExpression;
 		this.pattern = pattern;
 		this.escapeCharacter = escapeCharacter;
+		this.isCaseSensitive = isCaseSensitive;
 	}
 
 	public SqmLikePredicate(
@@ -50,8 +61,9 @@ public class SqmLikePredicate extends AbstractNegatableSqmPredicate {
 			SqmExpression<?> matchExpression,
 			SqmExpression<?> pattern,
 			boolean negated,
+			boolean isCaseSensitive,
 			NodeBuilder nodeBuilder) {
-		this( matchExpression, pattern, null, negated, nodeBuilder );
+		this( matchExpression, pattern, null, negated, isCaseSensitive, nodeBuilder );
 	}
 
 	public SqmExpression<?> getMatchExpression() {
@@ -66,6 +78,10 @@ public class SqmLikePredicate extends AbstractNegatableSqmPredicate {
 		return escapeCharacter;
 	}
 
+	public boolean isCaseSensitive() {
+		return isCaseSensitive;
+	}
+
 	@Override
 	public <T> T accept(SemanticQueryWalker<T> walker) {
 		return walker.visitLikePredicate( this );

hibernate-core/src/main/java/org/hibernate/sql/ast/spi/AbstractSqlAstTranslator.java

@@ -4562,6 +4562,8 @@ public abstract class AbstractSqlAstTranslator<T extends JdbcOperation> implemen
 
 	@Override
 	public void visitLikePredicate(LikePredicate likePredicate) {
+		if ( likePredicate.isCaseSensitive() ) {
+
 			likePredicate.getMatchExpression().accept( this );
 			if ( likePredicate.isNegated() ) {
 				appendSql( " not" );
@@ -4572,6 +4574,49 @@ public abstract class AbstractSqlAstTranslator<T extends JdbcOperation> implemen
 				appendSql( " escape " );
 				likePredicate.getEscapeCharacter().accept( this );
 			}
+
+		}
+		else {
+			if (dialect.supportsCaseInsensitiveLike()) {
+
+				likePredicate.getMatchExpression().accept( this );
+				if ( likePredicate.isNegated() ) {
+					appendSql( " not" );
+				}
+				appendSql( " " );
+				appendSql( dialect.getCaseInsensitiveLike() );
+				appendSql( " " );
+				likePredicate.getPattern().accept( this );
+				if ( likePredicate.getEscapeCharacter() != null ) {
+					appendSql( " escape " );
+					likePredicate.getEscapeCharacter().accept( this );
+				}
+
+			}
+			else {
+				renderCaseInsensitiveLikeEmulation(likePredicate.getMatchExpression(), likePredicate.getPattern(), likePredicate.getEscapeCharacter(), likePredicate.isNegated());
+			}
+
+		}
+	}
+
+	protected void renderCaseInsensitiveLikeEmulation(Expression lhs, Expression rhs, Expression escapeCharacter, boolean negated) {
+		//LOWER(lhs) operator LOWER(rhs)
+		appendSql( " " );
+		appendSql( dialect.getLowercaseFunction() );
+		appendSql( "( ");
+		lhs.accept( this );
+		appendSql( " )" );
+		appendSql( negated ? " not" : "" );
+		appendSql( " like " );
+		appendSql( dialect.getLowercaseFunction() );
+		appendSql( "( " );
+		rhs.accept( this );
+		appendSql( " ) " );
+		if ( escapeCharacter != null ) {
+			appendSql( " escape " );
+			escapeCharacter.accept( this );
+		}
 	}
 
 	@Override

hibernate-core/src/main/java/org/hibernate/sql/ast/tree/predicate/LikePredicate.java

@@ -17,6 +17,7 @@ public class LikePredicate implements Predicate {
 	private final Expression pattern;
 	private final Expression escapeCharacter;
 	private final boolean negated;
+	private final boolean isCaseSensitive;
 
 	public LikePredicate(
 			Expression matchExpression,
@@ -28,11 +29,22 @@ public class LikePredicate implements Predicate {
 	public LikePredicate(
 			Expression matchExpression,
 			Expression pattern,
-			Expression escapeCharacter, boolean negated) {
+			Expression escapeCharacter,
+			boolean negated) {
+		this( matchExpression, pattern, escapeCharacter, negated, true );
+	}
+
+	public LikePredicate(
+			Expression matchExpression,
+			Expression pattern,
+			Expression escapeCharacter,
+			boolean negated,
+			boolean isCaseSensitive) {
 		this.matchExpression = matchExpression;
 		this.pattern = pattern;
 		this.escapeCharacter = escapeCharacter;
 		this.negated = negated;
+		this.isCaseSensitive = isCaseSensitive;
 	}
 
 	public LikePredicate(Expression matchExpression, Expression pattern) {
@@ -55,6 +67,10 @@ public class LikePredicate implements Predicate {
 		return negated;
 	}
 
+	public boolean isCaseSensitive() {
+		return isCaseSensitive;
+	}
+
 	@Override
 	public boolean isEmpty() {
 		return false;

hibernate-core/src/test/java/org/hibernate/orm/test/query/hql/ILikeCriteriaTest.java

@@ -0,0 +1,278 @@
+/*
+ * Hibernate, Relational Persistence for Idiomatic Java
+ *
+ * License: GNU Lesser General Public License (LGPL), version 2.1 or later.
+ * See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
+ */
+package org.hibernate.orm.test.query.hql;
+
+import java.util.List;
+import javax.persistence.criteria.CriteriaQuery;
+import javax.persistence.criteria.Root;
+
+import org.hibernate.query.Query;
+import org.hibernate.query.criteria.HibernateCriteriaBuilder;
+
+import org.hibernate.testing.orm.domain.StandardDomainModel;
+import org.hibernate.testing.orm.domain.gambit.BasicEntity;
+import org.hibernate.testing.orm.junit.DomainModel;
+import org.hibernate.testing.orm.junit.ServiceRegistry;
+import org.hibernate.testing.orm.junit.SessionFactory;
+import org.hibernate.testing.orm.junit.SessionFactoryScope;
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+/**
+ * @author Jan Schatteman
+ */
+@ServiceRegistry
+@DomainModel(
+		standardModels = StandardDomainModel.GAMBIT
+)
+@SessionFactory
+public class ILikeCriteriaTest {
+
+	@BeforeEach
+	public void prepareData(SessionFactoryScope scope) {
+		scope.inTransaction(
+				em -> {
+					BasicEntity be1 = new BasicEntity(1, "Product_one");
+					em.persist( be1 );
+					BasicEntity be2 = new BasicEntity(2, "proDUct two");
+					em.persist( be2 );
+					BasicEntity be3 = new BasicEntity(3, "Product three");
+					em.persist( be3 );
+					BasicEntity be4 = new BasicEntity(4, "pROducT four");
+					em.persist( be4 );
+					BasicEntity be5 = new BasicEntity(5, "Product five");
+					em.persist( be5 );
+					BasicEntity be6 = new BasicEntity(6, "Prodact six");
+					em.persist( be6 );
+					BasicEntity be7 = new BasicEntity(7, "prodACt seven");
+					em.persist( be7 );
+					BasicEntity be8 = new BasicEntity(8, "Prod_act eight");
+					em.persist( be8 );
+					BasicEntity be9 = new BasicEntity(9, "prod_ACt nine");
+					em.persist( be9 );
+				}
+		);
+	}
+
+	@AfterEach
+	public void tearDown(SessionFactoryScope scope) {
+		scope.inTransaction(
+				session -> session.createQuery( "delete from BasicEntity" ).executeUpdate()
+		);
+	}
+
+	@Test
+	public void testLike(SessionFactoryScope scope) {
+		scope.inTransaction(
+			session -> {
+				HibernateCriteriaBuilder cb = session.getCriteriaBuilder();
+				CriteriaQuery cq = cb.createQuery( BasicEntity.class);
+				Root<BasicEntity> from = cq.from( BasicEntity.class );
+
+				cq.where( cb.like( from.get( "data" ), "Prod%" ) );
+				Query q = session.createQuery( cq );
+				List l = q.getResultList();
+				assertEquals( 5, l.size() );
+
+				cq.where( cb.like( from.get( "data" ), cb.literal( "Prod%" ) ) );
+				q = session.createQuery( cq );
+				l = q.getResultList();
+				assertEquals( 5, l.size() );
+			}
+		);
+	}
+
+	@Test
+	public void testLikeEscape(SessionFactoryScope scope) {
+		scope.inTransaction(
+				session -> {
+					HibernateCriteriaBuilder cb = session.getCriteriaBuilder();
+					CriteriaQuery cq = cb.createQuery( BasicEntity.class);
+					Root<BasicEntity> from = cq.from( BasicEntity.class );
+
+					cq.where( cb.like( from.get( "data" ), cb.literal( "Prod%" ), cb.literal( '$' ) ) );
+					Query q = session.createQuery( cq );
+					List l = q.getResultList();
+					assertEquals( 5, l.size() );
+
+					cq.where( cb.like( from.get( "data" ), cb.literal( "Prod%" ), '$' ) );
+					q = session.createQuery( cq );
+					l = q.getResultList();
+					assertEquals( 5, l.size() );
+
+					cq.where( cb.like( from.get( "data" ), "Prod%", cb.literal( '$' ) ) );
+					q = session.createQuery( cq );
+					l = q.getResultList();
+					assertEquals( 5, l.size() );
+
+					cq.where( cb.like( from.get( "data" ), "Prod%", '$' ) );
+					q = session.createQuery( cq );
+					l = q.getResultList();
+					assertEquals( 5, l.size() );
+				}
+		);
+	}
+
+	@Test
+	public void testNotLike(SessionFactoryScope scope) {
+		scope.inTransaction(
+				session -> {
+					HibernateCriteriaBuilder cb = session.getCriteriaBuilder();
+					CriteriaQuery cq = cb.createQuery( BasicEntity.class);
+					Root<BasicEntity> from = cq.from( BasicEntity.class );
+
+					cq.where( cb.notLike( from.get( "data" ), "Prod%" ) );
+					Query q = session.createQuery( cq );
+					List l = q.getResultList();
+					assertEquals( 4, l.size() );
+
+					cq.where( cb.notLike( from.get( "data" ), cb.literal( "Prod%" ) ) );
+					q = session.createQuery( cq );
+					l = q.getResultList();
+					assertEquals( 4, l.size() );
+				}
+		);
+	}
+
+	@Test
+	public void testNotLikeEscape(SessionFactoryScope scope) {
+		scope.inTransaction(
+				session -> {
+					HibernateCriteriaBuilder cb = session.getCriteriaBuilder();
+					CriteriaQuery cq = cb.createQuery( BasicEntity.class);
+					Root<BasicEntity> from = cq.from( BasicEntity.class );
+
+					cq.where( cb.notLike( from.get( "data" ), cb.literal( "Pr%$_%" ), cb.literal( '$' ) ) );
+					Query q = session.createQuery( cq );
+					List l = q.getResultList();
+					assertEquals( 7, l.size() );
+
+					cq.where( cb.notLike( from.get( "data" ), cb.literal( "Pr%$_%" ), '$' ) );
+					q = session.createQuery( cq );
+					l = q.getResultList();
+					assertEquals( 7, l.size() );
+
+					cq.where( cb.notLike( from.get( "data" ), "Pr%$_%", cb.literal( '$' ) ) );
+					q = session.createQuery( cq );
+					l = q.getResultList();
+					assertEquals( 7, l.size() );
+
+					cq.where( cb.notLike( from.get( "data" ), "Pr%$_%", '$' ) );
+					q = session.createQuery( cq );
+					l = q.getResultList();
+					assertEquals( 7, l.size() );
+				}
+		);
+	}
+
+	@Test
+	public void testIlike(SessionFactoryScope scope) {
+		scope.inTransaction(
+				session -> {
+					HibernateCriteriaBuilder cb = session.getCriteriaBuilder();
+					CriteriaQuery cq = cb.createQuery( BasicEntity.class);
+					Root<BasicEntity> from = cq.from( BasicEntity.class );
+
+					cq.where( cb.ilike( from.get( "data" ), "Produ%" ) );
+					Query q = session.createQuery( cq );
+					List l = q.getResultList();
+					assertEquals( 5, l.size() );
+
+					cq.where( cb.ilike( from.get( "data" ), cb.literal( "Produ%" ) ) );
+					q = session.createQuery( cq );
+					l = q.getResultList();
+					assertEquals( 5, l.size() );
+				}
+		);
+	}
+
+	@Test
+	public void testIlikeEscape(SessionFactoryScope scope) {
+		scope.inTransaction(
+				session -> {
+					HibernateCriteriaBuilder cb = session.getCriteriaBuilder();
+					CriteriaQuery cq = cb.createQuery( BasicEntity.class);
+					Root<BasicEntity> from = cq.from( BasicEntity.class );
+
+					cq.where( cb.ilike( from.get( "data" ), cb.literal( "Pr%$_%" ), cb.literal( '$' ) ) );
+					Query q = session.createQuery( cq );
+					List l = q.getResultList();
+					assertEquals( 3, l.size() );
+
+					cq.where( cb.ilike( from.get( "data" ), cb.literal( "Pr%$_%" ), '$' ) );
+					q = session.createQuery( cq );
+					l = q.getResultList();
+					assertEquals( 3, l.size() );
+
+					cq.where( cb.ilike( from.get( "data" ), "Pr%$_%", cb.literal( '$' ) ) );
+					q = session.createQuery( cq );
+					l = q.getResultList();
+					assertEquals( 3, l.size() );
+
+					cq.where( cb.ilike( from.get( "data" ), "Pr%$_%", '$' ) );
+					q = session.createQuery( cq );
+					l = q.getResultList();
+					assertEquals( 3, l.size() );
+				}
+		);
+	}
+
+	@Test
+	public void testNotIlike(SessionFactoryScope scope) {
+		scope.inTransaction(
+				session -> {
+					HibernateCriteriaBuilder cb = session.getCriteriaBuilder();
+					CriteriaQuery cq = cb.createQuery( BasicEntity.class);
+					Root<BasicEntity> from = cq.from( BasicEntity.class );
+
+					cq.where( cb.notIlike( from.get( "data" ), "Produ%" ) );
+					Query q = session.createQuery( cq );
+					List l = q.getResultList();
+					assertEquals( 4, l.size() );
+
+					cq.where( cb.notIlike( from.get( "data" ), cb.literal( "Produ%" ) ) );
+					q = session.createQuery( cq );
+					l = q.getResultList();
+					assertEquals( 4, l.size() );
+				}
+		);
+	}
+
+	@Test
+	public void testNotIlikeEscape(SessionFactoryScope scope) {
+		scope.inTransaction(
+				session -> {
+					HibernateCriteriaBuilder cb = session.getCriteriaBuilder();
+					CriteriaQuery cq = cb.createQuery( BasicEntity.class);
+					Root<BasicEntity> from = cq.from( BasicEntity.class );
+
+					cq.where( cb.notIlike( from.get( "data" ), cb.literal( "Pr%$_%" ), cb.literal( '$' ) ) );
+					Query q = session.createQuery( cq );
+					List l = q.getResultList();
+					assertEquals( 6, l.size() );
+
+					cq.where( cb.notIlike( from.get( "data" ), cb.literal( "Pr%$_%" ), '$' ) );
+					q = session.createQuery( cq );
+					l = q.getResultList();
+					assertEquals( 6, l.size() );
+
+					cq.where( cb.notIlike( from.get( "data" ), "Pr%$_%", cb.literal( '$' ) ) );
+					q = session.createQuery( cq );
+					l = q.getResultList();
+					assertEquals( 6, l.size() );
+
+					cq.where( cb.notIlike( from.get( "data" ), "Pr%$_%", '$' ) );
+					q = session.createQuery( cq );
+					l = q.getResultList();
+					assertEquals( 6, l.size() );
+				}
+		);
+	}
+}

hibernate-core/src/test/java/org/hibernate/orm/test/query/hql/ILikeTest.java

@@ -0,0 +1,156 @@
+/*
+ * Hibernate, Relational Persistence for Idiomatic Java
+ *
+ * License: GNU Lesser General Public License (LGPL), version 2.1 or later.
+ * See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
+ */
+package org.hibernate.orm.test.query.hql;
+
+import java.util.List;
+
+import org.hibernate.query.Query;
+
+import org.hibernate.testing.orm.domain.StandardDomainModel;
+import org.hibernate.testing.orm.domain.gambit.BasicEntity;
+import org.hibernate.testing.orm.junit.DomainModel;
+import org.hibernate.testing.orm.junit.ServiceRegistry;
+import org.hibernate.testing.orm.junit.SessionFactory;
+import org.hibernate.testing.orm.junit.SessionFactoryScope;
+
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+/**
+ * @author Jan Schatteman
+ */
+@ServiceRegistry
+@DomainModel(
+		standardModels = StandardDomainModel.GAMBIT
+)
+@SessionFactory
+public class ILikeTest {
+
+	@BeforeEach
+	public void prepareData(SessionFactoryScope scope) {
+		scope.inTransaction(
+				em -> {
+					BasicEntity be1 = new BasicEntity(1, "Product_one");
+					em.persist( be1 );
+					BasicEntity be2 = new BasicEntity(2, "proDUct two");
+					em.persist( be2 );
+					BasicEntity be3 = new BasicEntity(3, "Product three");
+					em.persist( be3 );
+					BasicEntity be4 = new BasicEntity(4, "pROducT four");
+					em.persist( be4 );
+					BasicEntity be5 = new BasicEntity(5, "Product five");
+					em.persist( be5 );
+					BasicEntity be6 = new BasicEntity(6, "Prodact six");
+					em.persist( be6 );
+					BasicEntity be7 = new BasicEntity(7, "prodACt seven");
+					em.persist( be7 );
+					BasicEntity be8 = new BasicEntity(8, "Prod_act eight");
+					em.persist( be8 );
+					BasicEntity be9 = new BasicEntity(9, "prod_ACt nine");
+					em.persist( be9 );
+				}
+		);
+	}
+
+	@AfterEach
+	public void tearDown(SessionFactoryScope scope) {
+		scope.inTransaction(
+				session -> session.createQuery( "delete from BasicEntity" ).executeUpdate()
+		);
+	}
+
+	@Test
+	public void testLike(SessionFactoryScope scope) {
+		scope.inTransaction(
+		session -> {
+				Query q = session.createQuery( "from BasicEntity be where be.data like 'Prod%'" );
+				List l = q.getResultList();
+				assertEquals( 5, l.size() );
+			}
+		);
+	}
+
+	@Test
+	public void testNotLike(SessionFactoryScope scope) {
+		scope.inTransaction(
+				session -> {
+					Query q = session.createQuery( "from BasicEntity be where be.data not like 'Prod%'" );
+					List l = q.getResultList();
+					assertEquals( 4, l.size() );
+				}
+		);
+	}
+
+	@Test
+	public void testLikeEscape(SessionFactoryScope scope) {
+		scope.inTransaction(
+				session -> {
+					Query q = session.createQuery( "from BasicEntity be where be.data like 'Pr%$_%' escape '$'" );
+					List l = q.getResultList();
+					assertEquals( 2, l.size() );
+				}
+		);
+	}
+
+	@Test
+	public void testNotLikeEscape(SessionFactoryScope scope) {
+		scope.inTransaction(
+				session -> {
+					Query q = session.createQuery( "from BasicEntity be where be.data not like 'Pr%$_%' escape '$'" );
+					List l = q.getResultList();
+					assertEquals( 7, l.size() );
+				}
+		);
+	}
+
+	@Test
+	public void testIlike(SessionFactoryScope scope) {
+		scope.inTransaction(
+				session -> {
+					Query q = session.createQuery( "from BasicEntity be where be.data ilike 'Produ%'" );
+					List l = q.getResultList();
+					assertEquals( 5, l.size() );
+				}
+		);
+	}
+
+	@Test
+	public void testNotIlike(SessionFactoryScope scope) {
+		scope.inTransaction(
+				session -> {
+					Query q = session.createQuery( "from BasicEntity be where be.data not ilike 'Produ%'" );
+					List l = q.getResultList();
+					assertEquals( 4, l.size() );
+				}
+		);
+	}
+
+	@Test
+	public void testIlikeEscape(SessionFactoryScope scope) {
+		scope.inTransaction(
+				session -> {
+					Query q = session.createQuery( "from BasicEntity be where be.data ilike 'Pr%$_%' escape '$'" );
+					List l = q.getResultList();
+					assertEquals( 3, l.size() );
+				}
+		);
+	}
+
+	@Test
+	public void testNotIlikeEscape(SessionFactoryScope scope) {
+		scope.inTransaction(
+				session -> {
+					Query q = session.createQuery( "from BasicEntity be where be.data not ilike 'Pr%$_%' escape '$'" );
+					List l = q.getResultList();
+					assertEquals( 6, l.size() );
+				}
+		);
+	}
+}