Fix for Bug#22931632, GETPARAMETERBINDINGS() ON A PS RETURNS NPE WHEN NOT ALL PARAMETERS ARE BOUND.

Change-Id: I3e4907277ccb83ad98dcc7125f3dc39c2365f57f

Author: Axyoan Marcelo

CHANGES

@@ -3,6 +3,8 @@
 
 Version 8.4.0
 
+  - Fix for Bug#22931632, GETPARAMETERBINDINGS() ON A PS RETURNS NPE WHEN NOT ALL PARAMETERS ARE BOUND.
+
   - WL#16147, Remove support for FIDO authentication.
 
   - Fix for Bug#110286 (Bug#35152855), Only call Messages.getString(...) when it's needed (when the SQLException is thrown).

src/main/user-impl/java/com/mysql/cj/jdbc/ParameterBindingsImpl.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2019, 2023, Oracle and/or its affiliates.
+ * Copyright (c) 2019, 2024, Oracle and/or its affiliates.
  *
  * This program is free software; you can redistribute it and/or modify it under
  * the terms of the GNU General Public License, version 2.0, as published by the
@@ -117,7 +117,8 @@ public class ParameterBindingsImpl implements ParameterBindings {
 
             Field parameterMetadata = new Field(null, "parameter_" + (i + 1), charsetIndex,
                     this.propertySet.getStringProperty(PropertyKey.characterEncoding).getValue(), this.queryBindings.getBindValues()[i].getMysqlType(),
-                    rowData[i].length);
+                    rowData[i] != null ? rowData[i].length : 0);
+
             typeMetadata[i] = parameterMetadata;
         }
 

src/test/java/testsuite/regression/StatementRegressionTest.java

@@ -13674,4 +13674,15 @@ public <T extends Resultset> T preProcess(java.util.function.Supplier<String> sq
 
     }
 
+    /**
+     * Test fix for Bug#22931632, GETPARAMETERBINDINGS() ON A PS RETURNS NPE WHEN NOT ALL PARAMETERS ARE BOUND.
+     *
+     * @throws Exception
+     */
+    @Test
+    public void testBug22931632() throws Exception {
+        this.pstmt = this.conn.prepareStatement("SELECT ?");
+        assertDoesNotThrow(((JdbcPreparedStatement) this.pstmt)::getParameterBindings);
+    }
+
 }