---
title: "Descriptor Field Conformance | Microsoft Docs"
ms.custom: ""
ms.date: "01/19/2017"
ms.prod: sql
ms.prod_service: connectivity
ms.reviewer: ""
ms.technology: connectivity
ms.topic: conceptual
helpviewer_keywords: 
  - "descriptor field conformance levels [ODBC]"
  - "conformance levels [ODBC], descriptor field"
  - "data sources [ODBC], conformance levels"
  - "ODBC drivers [ODBC], conformance levels"
ms.assetid: 6c29d93b-696c-4960-bff3-4d6bc41bc513
author: David-Engel
ms.author: v-daenge
---
# Descriptor Field Conformance
The following table indicates the conformance level of each ODBC descriptor header field, where this is well defined.  
  
|Function|Conformance level|  
|--------------|-----------------------|  
|SQL_DESC_ALLOC_TYPE|Core|  
|SQL_DESC_ARRAY_SIZE|Core|  
|SQL_DESC_ARRAY_STATUS_PTR|Core (for APD, IPR, and IRD); Level 1 (for ARD)|  
|SQL_DESC_BIND_OFFSET_PTR|Core|  
|SQL_DESC_BIND_TYPE|Core|  
|SQL_DESC_COUNT|Core|  
|SQL_DESC_ROWS_PROCESSED_PTR|Core|  
  
 The following table indicates the conformance level of each ODBC descriptor record field, where this is well defined.  
  
|Function|Conformance level|  
|--------------|-----------------------|  
|SQL_DESC_AUTO_UNIQUE_VALUE|Level 2|  
|SQL_DESC_BASE_COLUMN_NAME|Core|  
|SQL_DESC_BASE_TABLE_NAME|Level 1|  
|SQL_DESC_CASE_SENSITIVE|Core|  
|SQL_DESC_CATALOG_NAME|Level 2|  
|SQL_DESC_CONCISE_TYPE|Core|  
|SQL_DESC_DATA_PTR|Core|  
|SQL_DESC_DATETIME_INTERVAL_ CODE|Core[1]|  
|SQL_DESC_DATETIME_INTERVAL_ PRECISION|Core[1]|  
|SQL_DESC_DISPLAY_SIZE|Core|  
|SQL_DESC_FIXED_PREC_SCALE|Core|  
|SQL_DESC_INDICATOR_PTR|Core|  
|SQL_DESC_LABEL|Level 2|  
|SQL_DESC_LENGTH|Core|  
|SQL_DESC_LITERAL_PREFIX|Core|  
|SQL_DESC_LITERAL_SUFFIX|Core|  
|SQL_DESC_LOCAL_TYPE_NAME|Core|  
|SQL_DESC_NAME|Core|  
|SQL_DESC_NULLABLE|Core|  
|SQL_DESC_OCTET_LENGTH|Core|  
|SQL_DESC_OCTET_LENGTH_PTR|Core|  
|SQL_DESC_PARAMETER_TYPE|Core/Level 2[2]|  
|SQL_DESC_PRECISION|Core|  
|SQL_DESC_ROWVER|Level 1|  
|SQL_DESC_SCALE|Core|  
|SQL_DESC_SCHEMA_NAME|Level 1|  
|SQL_DESC_SEARCHABLE|Core|  
|SQL_DESC_TABLE_NAME|Level 1|  
|SQL_DESC_TYPE|Core|  
|SQL_DESC_TYPE_NAME|Core|  
|SQL_DESC_UNNAMED|Core|  
|SQL_DESC_UNSIGNED|Core|  
|SQL_DESC_UPDATABLE|Core|  
  
 [1]   Support for these record fields is required only if the driver supports the applicable data types.  
  
 [2]   For Core-level conformance, the driver must support SQL_PARAM_INPUT. For Level 2 interface conformance, the driver must also support SQL_PARAM_INPUT_OUTPUT and SQL_PARAM_OUTPUT.