[GitHub] [spark] dilipbiswal commented on a change in pull request #25530: [SPARK-28805][DOC] Document DESCRIBE FUNCTION in SQL Reference

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dilipbiswal commented on a change in pull request #25530: [SPARK-28805][DOC] Document DESCRIBE FUNCTION in SQL Reference
URL: https://github.com/apache/spark/pull/25530#discussion_r316340409
 
 

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 File path: docs/sql-ref-syntax-aux-describe-function.md
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 @@ -18,5 +18,40 @@ license: |
   See the License for the specific language governing permissions and
   limitations under the License.
 ---
+### Description
 
-**This page is under construction**
+Return the metadata such as qualified function name, implementing class and usage of an existing function.
+Input parameter function name may be optionally qualified. If the function is not qualified then the function is
+resolved from the current database. If EXTENDED option is specified then additionally extended usage information
 
 Review comment:
   @srowen Changed. Sean, i also backticked the function_name. Is that ok ? 

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