Handle Binding for null Boolean value

Author: sharadraju

lib/thin/protocol/messages/withData.js

@@ -447,7 +447,9 @@ class MessageWithData extends Message {
 
     if (!this.inFetch) {
       const actualNumBytes = buf.readSB4();
-      if (actualNumBytes !== 0 && colValue !== null) {
+      if (actualNumBytes < 0 && oraTypeNum === constants.TNS_DATA_TYPE_BOOLEAN) {
+        colValue = null;
+      } else if (actualNumBytes !== 0 && colValue !== null) {
         errors.throwErr(errors.ERR_INSUFFICIENT_BUFFER_FOR_BINDS);
       }
     } else if (oraTypeNum === constants.TNS_DATA_TYPE_LONG || oraTypeNum === constants.TNS_DATA_TYPE_LONG_RAW || variable.maxSize > buf.caps.maxStringSize) {

test/booleanBind.js

@@ -273,4 +273,14 @@ describe('224. booleanBind.js', function()  {
     //(result.outBinds[0].DATEVALUE).should.be.a.Date();
     assert.strictEqual(true, result.outBinds[0].BOOLEANVALUE);
   }); // 224.9
+
+  it('224.10 OUT bind value "null"', async function() {
+    const  binds = {
+      outval: { dir: oracledb.BIND_OUT, type: oracledb.DB_TYPE_BOOLEAN }
+    };
+    const  sql = `begin :outval := null; end;`;
+
+    const  result = await conn.execute(sql, binds);
+    assert.strictEqual(null, result.outBinds.outval);
+  }); // 224.10
 });