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doc: Clarify logical replication documentation

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Document that the data types of replicated tables do not need to
match.  The documentation previously claimed that they had to match.

Author: Robert Treat <rob@xzilla.net>
Discussion: https://www.postgresql.org/message-id/flat/CAJSLCQ13==D8Ka2YLyctTm0Y+8MhGYcX_zj7fU0rqRzhcV++3w@mail.gmail.com
This commit is contained in:
Peter Eisentraut 2019-07-08 14:28:42 +02:00
parent 24c5c711f4
commit 1b6c2b9d99
1 changed files with 9 additions and 4 deletions
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13
doc/src/sgml/logical-replication.sgml
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@ -232,10 +232,15 @@
</para>
<para>
Columns of a table are also matched by name. A different order of columns
in the target table is allowed, but the column types have to match. The
target table can have additional columns not provided by the published
table. Those will be filled with their default values.
Columns of a table are also matched by name. The order of columns in the
subscriber table does not need to match that of the publisher. The data
types of the columns do not need to match, as long as the text
representation of the data can be converted to the target type. For
example, you can replicate from a column of type <type>integer</type> to a
column of type <type>bigint</type>. The target table can also have
additional columns not provided by the published table. Any such columns
will be filled with the default value as specified in the definition of the
target table.
</para>
<sect2 id="logical-replication-subscription-slot">