HHH-12798: Fix for nested spatial functions on SAP HANA

hibernate-spatial/src/main/java/org/hibernate/spatial/dialect/hana/HANASpatialFunction.java

@@ -57,18 +57,19 @@ public class HANASpatialFunction extends StandardSQLFunction {
 		if ( arguments.size() == 0 ) {
 			return getName() + "()";
 		}
-		else {
+
 		final StringBuilder buf = new StringBuilder();
 		int firstArgumentIndex;
-			if ( staticFunction ) {
+		if ( this.staticFunction ) {
 			// Add function call
 			buf.append( getName() );
 			firstArgumentIndex = 0;
 		}
 		else {
 			// If the first argument is an expression, e.g. a nested function, strip the .ST_AsEWKB() suffix
-				buf.append( stripEWKBSuffix( arguments.get( 0 ) ) );
-
+			Object argument = arguments.get( 0 );
+			final boolean parseFromWKB = ( "?".equals( argument ) );
+			appendArgument( argument, parseFromWKB, buf );
 			// Add function call
 			buf.append( "." ).append( getName() );
 
@@ -83,13 +84,7 @@ public class HANASpatialFunction extends StandardSQLFunction {
 			// Check if first argument needs to be parsed from EWKB. This is the case if the first argument is a
 			// parameter that is set as EWKB or if it's a nested function call.
 			final boolean parseFromWKB = ( isGeometryArgument( i ) && "?".equals( argument ) );
-				if ( parseFromWKB ) {
-					buf.append( "ST_GeomFromEWKB(" );
-				}
-				buf.append( stripEWKBSuffix( argument ) );
-				if ( parseFromWKB ) {
-					buf.append( ")" );
-				}
+			appendArgument( argument, parseFromWKB, buf );
 			if ( i < arguments.size() - 1 ) {
 				buf.append( ", " );
 			}
@@ -101,7 +96,6 @@ public class HANASpatialFunction extends StandardSQLFunction {
 		}
 		return buf.toString();
 	}
-	}
 
 	private Object stripEWKBSuffix(Object argument) {
 		if ( ( argument instanceof String ) && ( (String) argument ).endsWith( AS_EWKB_SUFFIX ) ) {
@@ -115,4 +109,14 @@ public class HANASpatialFunction extends StandardSQLFunction {
 	private boolean isGeometryArgument(int idx) {
 		return this.argumentIsGeometryTypeMask.size() > idx && this.argumentIsGeometryTypeMask.get( idx );
 	}
+
+	private void appendArgument(Object argument, boolean parseFromWKB, StringBuilder buf) {
+		if ( parseFromWKB ) {
+			buf.append( "ST_GeomFromEWKB(" );
+		}
+		buf.append( stripEWKBSuffix( argument ) );
+		if ( parseFromWKB ) {
+			buf.append( ")" );
+		}
+	}
 }

hibernate-spatial/src/test/java/org/hibernate/spatial/dialect/hana/TestHANASpatialFunctions.java

@@ -1018,6 +1018,31 @@ public class TestHANASpatialFunctions extends TestSpatialFunctions {
 		retrieveHQLResultsAndCompare( dbexpected, hql, pckg );
 	}
 
+	@Test
+	public void test_nestedfunction_on_jts() throws SQLException {
+		nestedfunction( JTS );
+	}
+
+	@Test
+	public void test_nestedfunction_on_geolatte() throws SQLException {
+		nestedfunction( GEOLATTE );
+	}
+
+	public void nestedfunction(String pckg) throws SQLException {
+		Map<Integer, Geometry> dbexpected = hanaExpectationsFactory.getNestedFunctionInner( expectationsFactory.getTestPolygon() );
+		String hql = format(
+				"SELECT id, geom FROM org.hibernate.spatial.integration.%s.GeomEntity g where dwithin(geom, srid(:filter, 0), 1) = true",
+				pckg );
+		Map<String, Object> params = createQueryParams( "filter", expectationsFactory.getTestPolygon() );
+		retrieveHQLResultsAndCompare( dbexpected, hql, params, pckg );
+		
+		dbexpected = hanaExpectationsFactory.getNestedFunctionOuter( expectationsFactory.getTestPolygon() );
+		hql = format(
+				"SELECT id, geom FROM org.hibernate.spatial.integration.%s.GeomEntity g where dwithin(:filter, srid(geom, 0), 1) = true",
+				pckg );
+		retrieveHQLResultsAndCompare( dbexpected, hql, params, pckg );
+	}
+
 	private String getGeometryTypeFromPackage(String pckg) {
 		switch ( pckg ) {
 			case GEOLATTE:

hibernate-spatial/src/test/java/org/hibernate/spatial/testing/dialects/hana/HANAExpectationsFactory.java

@@ -1097,4 +1097,37 @@ public class HANAExpectationsFactory extends AbstractExpectationsFactory {
 				"select t.id, t.geom.ST_ZMin() from GeomTest t where t.geom.ST_SRID() = "
 						+ getTestSrid() );
 	}
+
+	/**
+	 * Returns the result of a nested function call with a parameter inside the inner function
+	 *
+	 * @return map of identifier, geometry
+	 * @throws SQLException
+	 */
+	public Map<Integer, Geometry> getNestedFunctionInner(Geometry geom) throws SQLException {
+		return retrieveExpected( createNativeNestedFunctionInnerStatement( geom ), GEOMETRY );
+	}
+
+	private NativeSQLStatement createNativeNestedFunctionInnerStatement(Geometry geom) {
+		return createNativeSQLStatementAllWKTParams(
+				"select t.id, t.geom from GeomTest t where t.geom.ST_WithinDistance(ST_GeomFromText(?, " + getTestSrid()
+						+ ").ST_SRID(0), 1) = 1",
+				geom.toText() );
+	}
+
+	/**
+	 * Returns the result of a nested function call with a parameter inside the outer function
+	 *
+	 * @return map of identifier, geometry
+	 * @throws SQLException
+	 */
+	public Map<Integer, Geometry> getNestedFunctionOuter(Geometry geom) throws SQLException {
+		return retrieveExpected( createNativeNestedFunctionOuterStatement( geom ), GEOMETRY );
+	}
+
+	private NativeSQLStatement createNativeNestedFunctionOuterStatement(Geometry geom) {
+		return createNativeSQLStatementAllWKTParams(
+				"select t.id, t.geom from GeomTest t where ST_GeomFromText(?, " + getTestSrid() + ").ST_WithinDistance(geom.ST_SRID(0), 1) = 1",
+				geom.toText() );
+	}
 }