Polishing.

Resolve mapped property paths to aggregate paths. Add tests.
Clean up unused profile declarations.

See #1803
Original pull request: #1967

pom.xml

@@ -52,7 +52,6 @@
 		<!-- test dependencies -->
 		<archunit.version>1.3.0</archunit.version>
 
-		<jmh.version>1.37</jmh.version>
 		<mbr.version>0.4.0.BUILD-SNAPSHOT</mbr.version>
 	</properties>
 
@@ -165,22 +164,14 @@
 		<profile>
 			<id>jmh</id>
 			<dependencies>
-				<dependency>
-					<groupId>com.github.mp911de.microbenchmark-runner</groupId>
-					<artifactId>microbenchmark-runner-junit5</artifactId>
-					<version>${mbr.version}</version>
-					<scope>test</scope>
-				</dependency>
 				<dependency>
 					<groupId>org.openjdk.jmh</groupId>
 					<artifactId>jmh-core</artifactId>
-					<version>${jmh.version}</version>
 					<scope>test</scope>
 				</dependency>
 				<dependency>
 					<groupId>org.openjdk.jmh</groupId>
 					<artifactId>jmh-generator-annprocess</artifactId>
-					<version>${jmh.version}</version>
 					<scope>test</scope>
 				</dependency>
 			</dependencies>

spring-data-jdbc/src/main/java/org/springframework/data/jdbc/core/convert/SqlGenerator.java

@@ -23,6 +23,7 @@ import org.springframework.data.domain.Pageable;
 import org.springframework.data.domain.Sort;
 import org.springframework.data.jdbc.repository.support.SimpleJdbcRepository;
 import org.springframework.data.mapping.PersistentPropertyPath;
+import org.springframework.data.mapping.context.InvalidPersistentPropertyPath;
 import org.springframework.data.mapping.context.MappingContext;
 import org.springframework.data.relational.core.dialect.Dialect;
 import org.springframework.data.relational.core.dialect.RenderContextFactory;
@@ -36,10 +37,10 @@ import org.springframework.data.relational.core.sql.*;
 import org.springframework.data.relational.core.sql.render.RenderContext;
 import org.springframework.data.relational.core.sql.render.SqlRenderer;
 import org.springframework.data.util.Lazy;
+import org.springframework.data.util.Predicates;
 import org.springframework.jdbc.core.namedparam.MapSqlParameterSource;
 import org.springframework.lang.Nullable;
 import org.springframework.util.Assert;
-import org.springframework.util.CollectionUtils;
 
 /**
  * Generates SQL statements to be used by {@link SimpleJdbcRepository}
@@ -539,27 +540,26 @@ class SqlGenerator {
 		Set<Expression> columns = new LinkedHashSet<>();
 		Set<Join> joins = new LinkedHashSet<>();
 
-		if (!CollectionUtils.isEmpty(query.getColumns())) {
-			for (SqlIdentifier columnName : query.getColumns()) {
+		for (SqlIdentifier columnName : query.getColumns()) {
 
-				String columnNameString = columnName.getReference();
-				RelationalPersistentProperty property = entity.getPersistentProperty(columnNameString);
-				if (property != null) {
+			try {
+				AggregatePath aggregatePath = mappingContext.getAggregatePath(
+						mappingContext.getPersistentPropertyPath(columnName.getReference(), entity.getTypeInformation()));
 
-					AggregatePath aggregatePath = mappingContext.getAggregatePath(
-							mappingContext.getPersistentPropertyPath(columnNameString, entity.getTypeInformation()));
-					gatherColumn(aggregatePath, joins, columns);
-				} else {
-					columns.add(Column.create(columnName, table));
-				}
+				includeColumnAndJoin(aggregatePath, joins, columns);
+			} catch (InvalidPersistentPropertyPath e) {
+				columns.add(Column.create(columnName, table));
 			}
-		} else {
+		}
+
+		if (columns.isEmpty()) {
+
 			for (PersistentPropertyPath<RelationalPersistentProperty> path : mappingContext
-					.findPersistentPropertyPaths(entity.getType(), p -> true)) {
+					.findPersistentPropertyPaths(entity.getType(), Predicates.isTrue())) {
 
 				AggregatePath aggregatePath = mappingContext.getAggregatePath(path);
 
-				gatherColumn(aggregatePath, joins, columns);
+				includeColumnAndJoin(aggregatePath, joins, columns);
 			}
 		}
 
@@ -570,7 +570,8 @@ class SqlGenerator {
 		return new Projection(columns, joins);
 	}
 
-	private void gatherColumn(AggregatePath aggregatePath, Set<Join> joins, Set<Expression> columns) {
+	private void includeColumnAndJoin(AggregatePath aggregatePath, Collection<Join> joins,
+			Collection<Expression> columns) {
 
 		joins.addAll(getJoins(aggregatePath));
 
@@ -639,10 +640,7 @@ class SqlGenerator {
 			// Simple entities without id include there backreference as a synthetic id in order to distinguish null entities
 			// from entities with only null values.
 
-			if (path.isQualified() //
-					|| path.isCollectionLike() //
-					|| path.hasIdProperty() //
-			) {
+			if (path.isQualified() || path.isCollectionLike() || path.hasIdProperty()) {
 				return null;
 			}
 

spring-data-jdbc/src/test/java/org/springframework/data/jdbc/core/convert/SqlGeneratorUnitTests.java

@@ -32,6 +32,7 @@ import java.util.Set;
 
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
+
 import org.springframework.data.annotation.Id;
 import org.springframework.data.annotation.ReadOnlyProperty;
 import org.springframework.data.annotation.Version;
@@ -399,7 +400,7 @@ class SqlGeneratorUnitTests {
 
 		assertThat(sql).contains( //
 				"SELECT", //
-				"ref.id1 AS id1, ref.content AS x_content", //
+				"ref.x_content AS ref_x_content", //
 				"FROM dummy_entity", //
 				"LEFT OUTER JOIN referenced_entity ref ON ref.dummy_entity = dummy_entity.id1");
 	}