Github user liuyu000 commented on a diff in the pull request:
https://github.com/apache/incubator-trafodion/pull/1350#discussion_r157655468
--- Diff:
docs/sql_reference/src/asciidoc/_chapters/sql_functions_and_expressions.adoc ---
@@ -3405,6 +3461,88 @@ DIFF2_I1TS
--- 5 row(s) selected.
```
+<<<
+[[emptyblob_function]]
+== EMPTY_BLOB() Function
+
+[[syntax_descriptions_of_emptyblob_function]]
+=== Syntax Descriptions of EMPTY_BLOB() Function
+
+The EMPTY_BLOB() function creates a dummy LOB handle with BLOB.
+
+This function can be used in INSERT or UPDATE statement, to initialize a
LOB column or attribute to EMPTY.
+
+EMPTY_BLOB() function is a Trafodion SQL extension.
+
+For more information, see
http://trafodion.incubator.apache.org/docs/lob_guide/index.html[Trafodion SQL
Large Objects Guide].
+
+```
+EMPTY_BLOB()
+```
+
+[[considerations_for_emptyblob_function]]
+=== Considerations for EMPTY_BLOB() Function
+
+* If EMPTY_BLOB() is specified, then a dummy lob handle is created.
+
+** No data is associated with the empty LOBs yet, but these dummy LOB
handles can later be used to populate with new LOB data. If the LOB had data
previously associated with it, it will be erased.
--- End diff --
OK, thanks Dave. :)
---
