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体验新版 GitCode,发现更多精彩内容 >>
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50a537dd
编写于
3月 25, 2019
作者:
D
dyozie
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Docs: update exchange partition limitation
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gpdb-doc/dita/admin_guide/ddl/ddl-partition.xml
gpdb-doc/dita/admin_guide/ddl/ddl-partition.xml
+2
-2
gpdb-doc/dita/ref_guide/sql_commands/ALTER_TABLE.xml
gpdb-doc/dita/ref_guide/sql_commands/ALTER_TABLE.xml
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gpdb-doc/dita/admin_guide/ddl/ddl-partition.xml
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50a537dd
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@@ -688,8 +688,8 @@ PARTITION other;
partition swaps one table in place of an existing partition. You can exchange partitions
only at the lowest level of your partition hierarchy (only partitions that contain data
can be exchanged).
</p>
<p>
You cannot exchange a partition with a replicated table.
You cannot exchange a partition
with a partitioned table or a child partition of a partitioned table
.
</p>
<p>
You cannot exchange a partition with a replicated table.
Exchanging a partition with a partitioned table or a child partition of a partitioned
table is not supported
.
</p>
<p>
Partition exchange can be useful for data loading. For example, load a staging table and
swap the loaded table into your partition design. You can use partition exchange to change
the storage type of older partitions to append-optimized tables. For example:
</p>
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gpdb-doc/dita/ref_guide/sql_commands/ALTER_TABLE.xml
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50a537dd
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@@ -802,9 +802,8 @@ where <varname>action</varname> is one of:
column with a check constraint or a
<codeph>
NOT
NULL
</codeph>
constraint.
</pd>
<pd>
You cannot exchange a partition with a replicated table.
You cannot exchange a partition with a partitioned
table or a child partition of a partitioned
table.
</pd>
Exchanging a partition with a partitioned table or a child partition of a partitioned
table is not supported.
</pd>
<pd><b>
WITH
</b>
|
<b>
WITHOUT VALIDATION
</b>
- Validates that
the data in the table matches the
<codeph>
CHECK
</codeph>
constraint of the partition
...
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