There are two JSON data types: <type>json</> and <type>jsonb</>.
Both accept <emphasis>almost</emphasis> identical sets of values as
input. The major practical difference is one of efficiency. The
- <type>json</> data type stores an exact copy of the the input text,
+ <type>json</> data type stores an exact copy of the input text,
which processing functions must continually reparse, while
<type>jsonb</> data is stored in a decomposed binary format that
makes it slightly less efficient to input due to added serialization
</indexterm>
<title>Logical Decoding</title>
<para>
- Logical decoding is the the process of extracting all persistent changes
+ Logical decoding is the process of extracting all persistent changes
to a database's tables into a coherent, easy to understand format which
can be interpreted without detailed knowledge of the database's internal
state.
* has progressed. There is a small fixed number of insertion locks,
* determined by the num_xloginsert_locks GUC. When an inserter crosses a
* page boundary, it updates the value stored in the lock to the how far it
- * has inserted, to allow the the previous buffer to be flushed.
+ * has inserted, to allow the previous buffer to be flushed.
*
* Holding onto an insertion lock also protects RedoRecPtr and
* fullPageWrites from changing until the insertion is finished.