partitioned tables: add some restrictions (pingcap#18483)

partitioned-table.md

@@ -1468,6 +1468,12 @@ Partition selection is supported for all types of table partitioning, including
 
 This section introduces some restrictions and limitations on partitioned tables in TiDB.
 
+- Using the [`ALTER TABLE ... CHANGE COLUMN`](/sql-statements/sql-statement-change-column.md) statement to change column types of partitioned tables is not supported.
+- Using the [`ALTER TABLE ... CACHE`](/cached-tables.md) statement to set partitioned tables to cached tables is not supported.
+- [Temporary tables](/temporary-tables.md) in TiDB are **NOT** compatible with partitioned tables.
+- Creating a [foreign key](/foreign-key.md) on a partitioned table is not supported.
+- The [`ORDER_INDEX(t1_name, idx1_name [, idx2_name ...])`](/optimizer-hints.md#order_indext1_name-idx1_name--idx2_name-) hint does not work for partitioned tables and their related indexes, because indexes on partitioned tables cannot be read in order.
+
 ### Partitioning keys, primary keys and unique keys
 
 This section discusses the relationship of partitioning keys with primary keys and unique keys. The rule governing this relationship can be expressed as follows: **Every unique key on the table must use every column in the table's partitioning expression**. This also includes the table's primary key, because it is by definition a unique key.

sql-statements/sql-statement-create-table.md

@@ -258,7 +258,7 @@ mysql> DESC t1;
 * The `[ASC | DESC]` in `index_col_name` is currently parsed but ignored (MySQL 5.7 compatible behavior).
 * The `COMMENT` attribute does not support the `WITH PARSER` option.
 * TiDB supports 1017 columns in a single table by default and 4096 columns at most. The corresponding number limit in InnoDB is 1017 columns, and the hard limit in MySQL is 4096 columns. For details, see [TiDB Limitations](/tidb-limitations.md).
-* For partitioned tables, only Range, Hash and Range Columns (single column) are supported. For details, see [partitioned table](/partitioned-table.md).
+* TiDB supports `HASH`, `RANGE`, `LIST`, and `KEY` [partitioning types](/partitioned-table.md#partitioning-types). For an unsupported partition type, TiDB returns `Warning: Unsupported partition type %s, treat as normal table`, where `%s` is the specific unsupported partition type.
 
 ## See also