[CONJ-1192] add a technical option for 3.3 compatibility

Author: rusher

src/main/java/org/mariadb/jdbc/ClientPreparedStatement.java

@@ -7,6 +7,8 @@
 
 import java.sql.*;
 import java.util.*;
+import org.mariadb.jdbc.client.ColumnDecoder;
+import org.mariadb.jdbc.client.result.CompleteResult;
 import org.mariadb.jdbc.client.result.Result;
 import org.mariadb.jdbc.client.util.ClosableLock;
 import org.mariadb.jdbc.export.ExceptionFactory;
@@ -257,6 +259,13 @@ public ResultSet executeQuery() throws SQLException {
     if (currResult instanceof Result) {
       return (Result) currResult;
     }
+    if (Boolean.parseBoolean(
+        con.getContext().getConf().nonMappedOptions().getProperty("permitNoResults", "false"))) {
+      // for compatibility with pre 3.4.0 version
+      return new CompleteResult(
+          new ColumnDecoder[0], new byte[0][], con.getContext(), resultSetType);
+    }
+
     throw new SQLException(
         "PrepareStatement.executeQuery() command does NOT return a result-set as expected. Either"
             + " use PrepareStatement.execute(), PrepareStatement.executeUpdate(), or correct"

src/main/java/org/mariadb/jdbc/ServerPreparedStatement.java

@@ -8,7 +8,9 @@
 import java.sql.*;
 import java.util.*;
 import java.util.regex.Pattern;
+import org.mariadb.jdbc.client.ColumnDecoder;
 import org.mariadb.jdbc.client.Completion;
+import org.mariadb.jdbc.client.result.CompleteResult;
 import org.mariadb.jdbc.client.result.Result;
 import org.mariadb.jdbc.client.util.ClosableLock;
 import org.mariadb.jdbc.client.util.Parameters;
@@ -382,6 +384,13 @@ public ResultSet executeQuery() throws SQLException {
     if ((currResult instanceof Result)) {
       return (Result) currResult;
     }
+    if (Boolean.parseBoolean(
+        con.getContext().getConf().nonMappedOptions().getProperty("permitNoResults", "false"))) {
+      // for compatibility with pre 3.4.0 version
+      return new CompleteResult(
+          new ColumnDecoder[0], new byte[0][], con.getContext(), resultSetType);
+    }
+
     throw new SQLException(
         "PrepareStatement.executeQuery() command does NOT return a result-set as expected. Either"
             + " use PrepareStatement.execute(), PrepareStatement.executeUpdate(), or correct"

src/main/java/org/mariadb/jdbc/Statement.java

@@ -10,6 +10,7 @@
 import java.util.*;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
+import org.mariadb.jdbc.client.ColumnDecoder;
 import org.mariadb.jdbc.client.Completion;
 import org.mariadb.jdbc.client.DataType;
 import org.mariadb.jdbc.client.result.CompleteResult;
@@ -168,6 +169,12 @@ public ResultSet executeQuery(String sql) throws SQLException {
     if (currResult instanceof Result) {
       return (Result) currResult;
     }
+    if (Boolean.parseBoolean(
+        con.getContext().getConf().nonMappedOptions().getProperty("permitNoResults", "false"))) {
+      // for compatibility with pre 3.4.0 version
+      return new CompleteResult(
+          new ColumnDecoder[0], new byte[0][], con.getContext(), resultSetType);
+    }
     throw new SQLException(
         "Statement.executeQuery() command does NOT return a result-set as expected. Either use"
             + " Statement.execute(), Statement.executeUpdate(), or correct command");

src/main/java/org/mariadb/jdbc/client/result/CompleteResult.java

@@ -121,7 +121,7 @@ private CompleteResult(ColumnDecoder[] metadataList, CompleteResult prev) {
    * @param context connection context
    * @param resultSetType result set type
    */
-  private CompleteResult(
+  public CompleteResult(
       ColumnDecoder[] metadataList, byte[][] data, Context context, int resultSetType) {
     super(metadataList, data, context, resultSetType);
   }

src/test/java/org/mariadb/jdbc/integration/ProcedureTest.java

@@ -67,6 +67,8 @@ public void settingParameterBeforeOutRegistration() throws SQLException {
         cstmt.setLong(1, 44L);
         cstmt.execute();
         assertEquals(88, cstmt.getLong(1));
+        ResultSet rs = cstmt.executeQuery();
+        assertFalse(rs.next());
       }
     }
   }

src/test/java/org/mariadb/jdbc/integration/StatementTest.java

@@ -93,6 +93,15 @@ public void ensureJdbcErrorWhenNoResultset() throws SQLException {
               + " command");
       ps.execute();
     }
+    try (Connection con = createCon("&permitNoResults=true")) {
+      try (PreparedStatement ps = con.prepareStatement("DO ?", Statement.RETURN_GENERATED_KEYS)) {
+        ps.setInt(1, 1);
+        ps.execute();
+        ResultSet rs = ps.executeQuery();
+        assertFalse(rs.next());
+        ps.execute();
+      }
+    }
     try (PreparedStatement ps =
         sharedConnBinary.prepareStatement("DO ?", Statement.RETURN_GENERATED_KEYS)) {
       ps.setInt(1, 1);
@@ -105,6 +114,14 @@ public void ensureJdbcErrorWhenNoResultset() throws SQLException {
               + " command");
       ps.execute();
     }
+    try (Connection con = createCon("permitNoResults=true&useServerPrepStmts=true")) {
+      try (PreparedStatement ps = con.prepareStatement("DO ?", Statement.RETURN_GENERATED_KEYS)) {
+        ps.setInt(1, 1);
+        ps.execute();
+        ResultSet rs = ps.executeQuery();
+        assertFalse(rs.next());
+      }
+    }
   }
 
   @Test