test: add test for PostgreSQL 11 CALL procedure

see https://www.postgresql.org/message-id/CADT4RqAo%3D%2Bm7zBuGsLzARf6ui90Humf7CJZR%2BzADXM%2B2oGvKUA%40mail.gmail.com
see pgjdbc#1235

pgjdbc/src/test/java/org/postgresql/test/jdbc3/CallCommandTest.java

@@ -0,0 +1,88 @@
+/*
+ * Copyright (c) 2018, PostgreSQL Global Development Group
+ * See the LICENSE file in the project root for more information.
+ */
+
+package org.postgresql.test.jdbc3;
+
+import org.postgresql.PGProperty;
+import org.postgresql.core.ServerVersion;
+import org.postgresql.jdbc.PreferQueryMode;
+import org.postgresql.test.TestUtil;
+import org.postgresql.test.jdbc2.BaseTest4;
+
+import org.junit.Assert;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.Parameterized;
+
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.sql.Statement;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Properties;
+
+@RunWith(Parameterized.class)
+public class CallCommandTest extends BaseTest4 {
+
+  @Parameterized.Parameter(0)
+  public PreferQueryMode preferQueryMode;
+
+  @Parameterized.Parameters(name = "preferQueryMode={0}")
+  public static Iterable<Object[]> data() {
+    Collection<Object[]> ids = new ArrayList<Object[]>();
+    for (PreferQueryMode mode : PreferQueryMode.values()) {
+      ids.add(new Object[]{mode});
+    }
+    return ids;
+  }
+
+  @Override
+  protected void updateProperties(Properties props) {
+    super.updateProperties(props);
+    PGProperty.PREFER_QUERY_MODE.set(props, preferQueryMode.value());
+  }
+
+  @Override
+  public void setUp() throws Exception {
+    super.setUp();
+    assumeMinimumServerVersion(ServerVersion.from("11.0"));
+    Statement st = con.createStatement();
+    st.executeUpdate("CREATE OR REPLACE PROCEDURE my_proc(INOUT results text)\n"
+        + "LANGUAGE 'plpgsql'\n"
+        + "AS $BODY$\n"
+        + "BEGIN\n"
+        + "    select 'test' into results;\n"
+        + "END;\n"
+        + "$BODY$;");
+  }
+
+  @Override
+  public void tearDown() throws SQLException {
+    Statement st = con.createStatement();
+    st.executeUpdate("DROP PROCEDURE my_proc(INOUT results text)");
+    super.tearDown();
+  }
+
+  @Test
+  public void simpleStatement() throws Throwable {
+    Statement st = con.createStatement();
+    ResultSet rs = st.executeQuery("CALL my_proc('whatever')");
+    rs.next();
+    Assert.assertEquals("test", rs.getString(1));
+    TestUtil.closeQuietly(rs);
+    TestUtil.closeQuietly(st);
+  }
+
+  @Test
+  public void preparedStatement() throws Throwable {
+    PreparedStatement st = con.prepareStatement("CALL my_proc('whatever')");
+    ResultSet rs = st.executeQuery();
+    rs.next();
+    Assert.assertEquals("test", rs.getString(1));
+    TestUtil.closeQuietly(rs);
+    TestUtil.closeQuietly(st);
+  }
+}

pgjdbc/src/test/java/org/postgresql/test/jdbc3/Jdbc3TestSuite.java

@@ -14,6 +14,7 @@
 @RunWith(Suite.class)
 @Suite.SuiteClasses({
     Jdbc3CallableStatementTest.class,
+    CallCommandTest.class,
     GeneratedKeysTest.class,
     CompositeQueryParseTest.class,
     SqlCommandParseTest.class,