diff --git a/source/shared/core_stmt.cpp b/source/shared/core_stmt.cpp
index 052884ee..09c8d9bf 100644
--- a/source/shared/core_stmt.cpp
+++ b/source/shared/core_stmt.cpp
@@ -2030,6 +2030,15 @@ void finalize_output_parameters( sqlsrv_stmt* stmt TSRMLS_DC )
                 throw core::CoreException();
             }
 
+            // For ODBC 11+ see https://msdn.microsoft.com/en-us/library/jj219209.aspx
+            // A length value of SQL_NO_TOTAL for SQLBindParameter indicates that the buffer contains up to
+            // output_param->original_buffer_len data and is NULL terminated.             
+            // The IF statement can be true when using connection pooling with unixODBC 2.3.4.
+            if ( str_len == SQL_NO_TOTAL )
+            {
+                str_len = output_param->original_buffer_len - null_size;
+            }
+
             // if it's not in the 8 bit encodings, then it's in UTF-16
             if( output_param->encoding != SQLSRV_ENCODING_CHAR && output_param->encoding != SQLSRV_ENCODING_BINARY ) {
 				bool converted = convert_zval_string_from_utf16(output_param->encoding, value_z, str_len);
diff --git a/test/sqlsrv/sqlsrv_bind_param_out_string.phpt b/test/sqlsrv/sqlsrv_bind_param_out_string.phpt
new file mode 100644
index 00000000..4cb11131
--- /dev/null
+++ b/test/sqlsrv/sqlsrv_bind_param_out_string.phpt
@@ -0,0 +1,459 @@
+--TEST--
+Verify the Binary and Char encoding output when binding output string with SQLSTYPE option with different size.
+--DESCRIPTION--
+Tests different sizes of output string which may cause ODBC to return trunc error info.
+With unixODBC 2.3.4, when connection pooling is enabled, error information maybe returned differently
+than older versions (or with pooling disabled).
+The NVARCHAR(1) section would cause an ODBC call to return an errorinfo to the driver causing the statement to fail.
+With unixODBC 2.3.4 + pooling the statement executes without error.
+--FILE--
+
+<?php
+require_once("autonomous_setup.php");
+
+$connectionInfo = array("UID"=>"$username", "PWD"=>"$password");
+$conn = sqlsrv_connect($serverName, $connectionInfo);
+if( $conn === false ) {
+    die( print_r( sqlsrv_errors(), true ));
+}
+$conn = null;
+
+$conn = sqlsrv_connect($serverName, $connectionInfo);
+if( $conn === false ) {
+    die( print_r( sqlsrv_errors(), true ));
+}
+
+
+$bindtable = "#BindStringTest";
+$sproc = "#uspPerson";
+
+// Create table
+$stmt = sqlsrv_query( $conn, "CREATE TABLE $bindtable (PersonID int, Name nvarchar(50))" );
+if( $stmt === false ) {
+    die( print_r( sqlsrv_errors(), true ));
+}
+
+$stmt = sqlsrv_query( $conn, "INSERT INTO $bindtable (PersonID, Name) VALUES (10, N'Miller')" );
+if( $stmt === false ) {
+    die( print_r( sqlsrv_errors(), true ));
+}
+
+$stmt = sqlsrv_query( $conn, "INSERT INTO $bindtable (PersonID, Name) VALUES (11, N'JSmith')" );
+if( $stmt === false ) {
+    die( print_r( sqlsrv_errors(), true ));
+}			
+
+$tsql_createSP = "CREATE PROCEDURE $sproc
+    @id int, @return nvarchar(50) OUTPUT
+	AS
+	BEGIN
+	SET NOCOUNT ON;
+	SET @return = (SELECT Name FROM $bindtable WHERE PersonID = @id)
+	END";
+	
+$stmt = sqlsrv_query( $conn, $tsql_createSP);
+if( $stmt === false )
+{
+     echo "Error in executing statement 2.\n";
+     die( print_r( sqlsrv_errors(), true));
+}
+
+$tsql_callSP = "{call $sproc( ? , ?)}";
+
+
+//***********************************************************************************************
+
+echo "NVARCHAR(32)\n";
+echo "---------Encoding char-----------\n";
+$id = 10;
+$return = "";
+$params = array( 
+	array($id, SQLSRV_PARAM_IN),
+    array(&$return, SQLSRV_PARAM_OUT,
+					SQLSRV_PHPTYPE_STRING(SQLSRV_ENC_CHAR),	
+                   SQLSRV_SQLTYPE_NVARCHAR(32)
+            ));
+
+if( $stmt = sqlsrv_query($conn, $tsql_callSP, $params) === false)
+{
+		 print_r( sqlsrv_errors(), true);
+}
+
+$expectedLength = 6;
+$expectedValue = "Miller";
+$actualLength = strlen($return);
+$actualValue = $return;
+compareResults ( $expectedLength, $expectedValue, $actualLength, $actualValue );
+
+echo "---------Encoding binary---------\n";
+$id = 10;
+$return = "";
+$params = array( 
+	array($id, SQLSRV_PARAM_IN),
+    array(&$return, SQLSRV_PARAM_OUT,
+					SQLSRV_PHPTYPE_STRING(SQLSRV_ENC_BINARY),	
+                   SQLSRV_SQLTYPE_NVARCHAR(32)
+            ));
+if( $stmt = sqlsrv_query($conn, $tsql_callSP, $params) == false)
+     {
+		 print_r( sqlsrv_errors(), true);
+     }
+ 
+$expectedLength = 12;
+$expectedValue = "M\0i\0l\0l\0e\0r\0";
+$actualLength = strlen($return);
+$actualValue = $return;
+compareResults ( $expectedLength, $expectedValue, $actualLength, $actualValue );
+
+//***********************************************************************************************
+echo "\n\n";
+echo "NVARCHAR(50)\n";
+echo "---------Encoding char-----------\n";
+$id = 10;
+$return = "";
+$params = array( 
+	array($id, SQLSRV_PARAM_IN),
+    array(&$return, SQLSRV_PARAM_OUT,
+					SQLSRV_PHPTYPE_STRING(SQLSRV_ENC_CHAR),	
+                   SQLSRV_SQLTYPE_NVARCHAR(50)
+            ));
+
+if( $stmt = sqlsrv_query($conn, $tsql_callSP, $params) === false)
+{
+		 print_r( sqlsrv_errors(), true);
+}
+
+$expectedLength = 6;
+$expectedValue = "Miller";
+$actualLength = strlen($return);
+$actualValue = $return;
+compareResults ( $expectedLength, $expectedValue, $actualLength, $actualValue );
+
+
+echo "---------Encoding binary---------\n";
+$id = 10;
+$return = "";
+$params = array( 
+	array($id, SQLSRV_PARAM_IN),
+    array(&$return, SQLSRV_PARAM_OUT,
+					SQLSRV_PHPTYPE_STRING(SQLSRV_ENC_BINARY),	
+                   SQLSRV_SQLTYPE_NVARCHAR(50)
+            ));
+if( $stmt = sqlsrv_query($conn, $tsql_callSP, $params) == false)
+     {
+		 print_r( sqlsrv_errors(), true);
+     }
+     
+$expectedLength = 12;
+$expectedValue = "M\0i\0l\0l\0e\0r\0";
+$actualLength = strlen($return);
+$actualValue = $return;
+compareResults ( $expectedLength, $expectedValue, $actualLength, $actualValue );
+
+//***********************************************************************************************
+echo "\n\n";
+echo "NVARCHAR(1)\n";
+echo "---------Encoding char-----------\n";
+$id = 10;
+$return = "";
+
+
+$params = array( 
+	array($id, SQLSRV_PARAM_IN),
+    array(&$return, SQLSRV_PARAM_OUT,
+					SQLSRV_PHPTYPE_STRING(SQLSRV_ENC_CHAR),	
+                   SQLSRV_SQLTYPE_NVARCHAR(1)
+            ));
+
+// with unixODBC 2.3.4 connection pooling the statement may not fail.
+if( $stmt = sqlsrv_query($conn, $tsql_callSP, $params) === false)
+{
+		 echo "Statement should fail\n";
+}
+
+$expectedLength = 1;
+$expectedValue = "M";
+$actualValue = $return;
+$actualLength = strlen($return);
+compareResults ( $expectedLength, $expectedValue, $actualLength, $actualValue );
+
+echo "---------Encoding binary---------\n";
+$id = 10;
+$return = "";
+$params = array( 
+	array($id, SQLSRV_PARAM_IN),
+    array(&$return, SQLSRV_PARAM_OUT,
+					SQLSRV_PHPTYPE_STRING(SQLSRV_ENC_BINARY),	
+                   SQLSRV_SQLTYPE_NVARCHAR(1)
+            ));
+if( $stmt = sqlsrv_query($conn, $tsql_callSP, $params) == false)
+     {
+		 echo "Statement should fail\n";
+     }
+ 
+$expectedLength = 2;
+$expectedValue = "M\0";
+$actualLength = strlen($return);
+$actualValue = $return;
+compareResults ( $expectedLength, $expectedValue, $actualLength, $actualValue );
+
+//***********************************************************************************************
+echo "\n\n";
+echo "NCHAR(32)\n";
+echo "---------Encoding char-----------\n";
+$id = 10;
+$return = "";
+$params = array( 
+	array($id, SQLSRV_PARAM_IN),
+    array(&$return, SQLSRV_PARAM_OUT,
+					SQLSRV_PHPTYPE_STRING(SQLSRV_ENC_CHAR),	
+                   SQLSRV_SQLTYPE_NCHAR(32)
+            ));
+
+if( $stmt = sqlsrv_query($conn, $tsql_callSP, $params) === false)
+{
+		 print_r( sqlsrv_errors(), true);
+}
+
+$expectedLength = 32;
+$expectedValue = "Miller                          ";
+$actualLength = strlen($return);
+$actualValue = $return;
+compareResults ( $expectedLength, $expectedValue, $actualLength, $actualValue );
+
+echo "---------Encoding binary---------\n";
+$id = 10;
+$return = "";
+$params = array( 
+	array($id, SQLSRV_PARAM_IN),
+    array(&$return, SQLSRV_PARAM_OUT,
+					SQLSRV_PHPTYPE_STRING(SQLSRV_ENC_BINARY),	
+                   SQLSRV_SQLTYPE_NCHAR(32)
+            ));
+if( $stmt = sqlsrv_query($conn, $tsql_callSP, $params) == false)
+     {
+		 print_r( sqlsrv_errors(), true);
+     }
+     
+$expectedLength = 64;
+$expectedValue = "M\0i\0l\0l\0e\0r\0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0";
+$actualLength = strlen($return);
+$actualValue = $return;
+compareResults ( $expectedLength, $expectedValue, $actualLength, $actualValue ); 
+
+//***********************************************************************************************
+echo "\n\n";
+echo "NCHAR(0)\n";
+echo "---------Encoding char-----------\n";
+$id = 10;
+$return = "";
+$params = array( 
+	array($id, SQLSRV_PARAM_IN),
+    array(&$return, SQLSRV_PARAM_OUT,
+					SQLSRV_PHPTYPE_STRING(SQLSRV_ENC_CHAR),	
+                   SQLSRV_SQLTYPE_NCHAR(0)
+            ));
+
+if( $stmt = sqlsrv_query($conn, $tsql_callSP, $params) === false)
+{
+		 echo "Statement should fail\n";
+}
+
+$expectedLength = 0;
+$expectedValue = "";
+$actualLength = strlen($return);
+$actualValue = $return;
+compareResults ( $expectedLength, $expectedValue, $actualLength, $actualValue ); 
+
+echo "---------Encoding binary---------\n";
+$id = 10;
+$return = "";
+$params = array( 
+	array($id, SQLSRV_PARAM_IN),
+    array(&$return, SQLSRV_PARAM_OUT,
+					SQLSRV_PHPTYPE_STRING(SQLSRV_ENC_BINARY),	
+                   SQLSRV_SQLTYPE_NCHAR(0)
+            ));
+if( $stmt = sqlsrv_query($conn, $tsql_callSP, $params) == false)
+     {
+		 echo "Statement should fail\n";
+     }
+ 
+$expectedLength = 0;
+$expectedValue = "";
+$actualLength = strlen($return);
+$actualValue = $return;
+compareResults ( $expectedLength, $expectedValue, $actualLength, $actualValue ); 
+
+//***********************************************************************************************
+echo "\n\n";
+echo "NCHAR(50)\n"; 
+echo "---------Encoding char-----------\n";
+$id = 10;
+$return = "";
+$params = array( 
+	array($id, SQLSRV_PARAM_IN),
+    array(&$return, SQLSRV_PARAM_OUT,
+					SQLSRV_PHPTYPE_STRING(SQLSRV_ENC_CHAR),	
+                   SQLSRV_SQLTYPE_NCHAR(50)
+            ));
+
+if( $stmt = sqlsrv_query($conn, $tsql_callSP, $params) === false)
+{
+		 print_r( sqlsrv_errors(), true);
+}
+
+$expectedLength = 50;
+$expectedValue = "Miller                                            ";
+$actualLength = strlen($return);
+$actualValue = $return;
+compareResults ( $expectedLength, $expectedValue, $actualLength, $actualValue ); 
+
+echo "---------Encoding binary---------\n";
+$id = 10;
+$return = "";
+$params = array( 
+	array($id, SQLSRV_PARAM_IN),
+    array(&$return, SQLSRV_PARAM_OUT,
+					SQLSRV_PHPTYPE_STRING(SQLSRV_ENC_BINARY),	
+                   SQLSRV_SQLTYPE_NCHAR(50)
+            ));
+if( $stmt = sqlsrv_query($conn, $tsql_callSP, $params) == false)
+     {
+		 print_r( sqlsrv_errors(), true);
+     }
+ 
+$expectedLength = 100;
+$expectedValue = "M\0i\0l\0l\0e\0r\0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0";
+$actualLength = strlen($return);
+$actualValue = $return;
+compareResults ( $expectedLength, $expectedValue, $actualLength, $actualValue ); 
+
+//***********************************************************************************************
+// NCHAR 1: less than length of the returned value 
+echo "\n\n";
+echo "NCHAR(1)\n";
+echo "---------Encoding char-----------\n";
+$id = 10;
+$return = "";
+$params = array( 
+	array($id, SQLSRV_PARAM_IN),
+    array(&$return, SQLSRV_PARAM_OUT,
+					SQLSRV_PHPTYPE_STRING(SQLSRV_ENC_CHAR),	
+                   SQLSRV_SQLTYPE_NCHAR(1)
+            ));
+
+if( $stmt = sqlsrv_query($conn, $tsql_callSP, $params) === false)
+{
+		 print_r( sqlsrv_errors(), true);
+}
+
+$expectedLength = 1;
+$expectedValue = "M";
+$actualValue = $return;
+$actualLength = strlen($return);
+compareResults ( $expectedLength, $expectedValue, $actualLength, $actualValue );
+
+echo "---------Encoding binary---------\n";
+$id = 10;
+$return = "";
+$params = array( 
+	array($id, SQLSRV_PARAM_IN),
+    array(&$return, SQLSRV_PARAM_OUT,
+					SQLSRV_PHPTYPE_STRING(SQLSRV_ENC_BINARY),	
+                   SQLSRV_SQLTYPE_NCHAR(1)
+            ));
+if( $stmt = sqlsrv_query($conn, $tsql_callSP, $params) == false)
+     {
+		 print_r( sqlsrv_errors(), true);
+     }
+ 
+$expectedLength = 2;
+$expectedValue = "M\0";
+$actualValue = $return;
+$actualLength = strlen($return);
+compareResults ( $expectedLength, $expectedValue, $actualLength, $actualValue );
+
+sqlsrv_close($conn);
+
+$status = true;
+
+/**
+*  Compares actual output to expected one
+*  @param $expectedLength The length of the expected value
+*  @param $expectedValue The expected value
+*  @param $actualLength The length of the actual value
+*  @param $actualValue The actual value
+*/
+function compareResults ( $expectedLength, $expectedValue, $actualLength, $actualValue )
+{
+    $match = false;
+    if ( $expectedLength == $actualLength) 
+    {
+        if ( strncmp ( $actualValue, $expectedValue, $expectedLength ) == 0 )
+        {
+            $match = true;
+        }
+    } 
+    if ( !$match )
+    {
+        echo "The actual result is different from the expected one \n";
+    }
+    else
+    {
+        echo "The actual result is the same as the expected one \n";
+    }
+}
+?>
+--EXPECT--
+NVARCHAR(32)
+---------Encoding char-----------
+The actual result is the same as the expected one 
+---------Encoding binary---------
+The actual result is the same as the expected one 
+
+
+NVARCHAR(50)
+---------Encoding char-----------
+The actual result is the same as the expected one 
+---------Encoding binary---------
+The actual result is the same as the expected one 
+
+
+NVARCHAR(1)
+---------Encoding char-----------
+Statement should fail
+The actual result is the same as the expected one 
+---------Encoding binary---------
+Statement should fail
+The actual result is the same as the expected one 
+
+
+NCHAR(32)
+---------Encoding char-----------
+The actual result is the same as the expected one 
+---------Encoding binary---------
+The actual result is the same as the expected one 
+
+
+NCHAR(0)
+---------Encoding char-----------
+Statement should fail
+The actual result is the same as the expected one 
+---------Encoding binary---------
+Statement should fail
+The actual result is the same as the expected one 
+
+
+NCHAR(50)
+---------Encoding char-----------
+The actual result is the same as the expected one 
+---------Encoding binary---------
+The actual result is the same as the expected one 
+
+
+NCHAR(1)
+---------Encoding char-----------
+The actual result is the same as the expected one 
+---------Encoding binary---------
+The actual result is the same as the expected one