[iceberg] branch master updated: Docs: Update migrate drop_backup flag (#6025)

[sz...@apache.org]

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The following commit(s) were added to refs/heads/master by this push:
     new bd225d5125 Docs: Update migrate drop_backup flag (#6025)
bd225d5125 is described below

commit bd225d5125baad78dc296911963dfd868520b4d8
Author: Rishi <sr...@gmail.com>
AuthorDate: Sat Nov 5 00:07:57 2022 -0700

    Docs: Update migrate drop_backup flag (#6025)
---
 docs/spark-procedures.md | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/docs/spark-procedures.md b/docs/spark-procedures.md
index 63990cb55f..8b4c539d76 100644
--- a/docs/spark-procedures.md
+++ b/docs/spark-procedures.md
@@ -421,12 +421,15 @@ Existing data files are added to the Iceberg table's metadata and can be read us
 
 To leave the original table intact while testing, use [`snapshot`](#snapshot) to create new temporary table that shares source data files and schema.
 
+By default, the original table is retained with the name `table_BACKUP_`.
+
 #### Usage
 
 | Argument Name | Required? | Type | Description |
 |---------------|-----------|------|-------------|
 | `table`       | ✔️  | string | Name of the table to migrate |
 | `properties`  | ️   | map<string, string> | Properties for the new Iceberg table |
+| `drop_backup` |   | boolean | When true, the original table will not be retained as backup (defaults to false) |
 
 #### Output