<filename>reformat_dat_file.pl</filename> can be adapted to perform
many kinds of bulk changes. Look for its block comments showing where
one-off code can be inserted. In the following example, we are going
- to consolidate two boolean fields in <structname>pg_proc</structname>
+ to consolidate two Boolean fields in <structname>pg_proc</structname>
into a char field:
<orderedlist>
<structfield>vartype</structfield> = <type>RECORD</type>,
and <literal>wholerow<replaceable>N</replaceable></literal>
for a whole-row <structname>Var</structname> with
- <structfield>vartype</structfield> equal to the table's declared rowtype.
+ <structfield>vartype</structfield> equal to the table's declared row type.
Re-use these names when you can (the planner will combine duplicate
requests for identical junk columns). If you need another kind of
junk column besides these, it might be wise to choose a name prefixed
sending a <systemitem>SIGHUP</systemitem> signal to the postmaster
process, which in turn sends <systemitem>SIGHUP</systemitem> to each
of its children.) You can use the
- <link linkend="view-pg-file-settings">pg_file_settings</link> and
- <link linkend="view-pg-hba-file-rules">pg_hba_file_rules</link> views
+ <link linkend="view-pg-file-settings"><structname>pg_file_settings</structname></link> and
+ <link linkend="view-pg-hba-file-rules"><structname>pg_hba_file_rules</structname></link> views
to check the configuration files for possible errors, before reloading.
</para></entry>
</row>
<para>
Depending on which operators you have included in the class, the data
type of <varname>query</varname> could vary with the operator, since it will
- be whatever type is on the righthand side of the operator, which might
- be different from the indexed data type appearing on the lefthand side.
+ be whatever type is on the right-hand side of the operator, which might
+ be different from the indexed data type appearing on the left-hand side.
(The above code skeleton assumes that only one type is possible; if
not, fetching the <varname>query</varname> argument value would have to depend
on the operator.) It is recommended that the SQL declaration of
</para>
<para>
- The <literal>indexUnchanged</literal> boolean value gives a hint
+ The <literal>indexUnchanged</literal> Boolean value gives a hint
about the nature of the tuple to be indexed. When it is true,
the tuple is a duplicate of some existing tuple in the index. The
new tuple is a logically unchanged successor MVCC tuple version. This
code, it's better to inspect <parameter>prop</parameter>.
If the <structfield>amproperty</structfield> method returns <literal>true</literal> then
it has determined the property test result: it must set <literal>*res</literal>
- to the boolean value to return, or set <literal>*isnull</literal>
+ to the Boolean value to return, or set <literal>*isnull</literal>
to <literal>true</literal> to return a NULL. (Both of the referenced variables
are initialized to <literal>false</literal> before the call.)
If the <structfield>amproperty</structfield> method returns <literal>false</literal> then
<para>
<command>UPDATE</command> statements may use subscripting in the
<literal>SET</literal> clause to modify <type>jsonb</type> values. Subscript
- paths must be traversible for all affected values insofar as they exist. For
+ paths must be traversable for all affected values insofar as they exist. For
instance, the path <literal>val['a']['b']['c']</literal> can be traversed all
the way to <literal>c</literal> if every <literal>val</literal>,
<literal>val['a']</literal>, and <literal>val['a']['b']</literal> is an
There is no environment variable equivalent to this option, and no
facility for looking it up in <filename>.pgpass</filename>. It can be
used in a service file connection definition. Users with
- more sophisticated uses should consider using openssl engines and
+ more sophisticated uses should consider using <productname>OpenSSL</productname> engines and
tools like PKCS#11 or USB crypto offload devices.
</para>
</listitem>
<para>
While the pipeline API was introduced in
<productname>PostgreSQL</productname> 14, it is a client-side feature
- which doesn't require special server support, and works on any server
+ which doesn't require special server support and works on any server
that supports the v3 extended query protocol.
</para>
are being performed in rapid succession. There is usually less benefit
in using pipelined commands when each query takes many multiples of the client/server
round-trip time to execute. A 100-statement operation run on a server
- 300ms round-trip-time away would take 30 seconds in network latency alone
- without pipelining; with pipelining it may spend as little as 0.3s waiting for
+ 300 ms round-trip-time away would take 30 seconds in network latency alone
+ without pipelining; with pipelining it may spend as little as 0.3 s waiting for
results from the server.
</para>
<para>
Each registered event handler is associated with two pieces of data,
known to <application>libpq</application> only as opaque <literal>void *</literal>
- pointers. There is a <firstterm>passthrough</firstterm> pointer that is provided
+ pointers. There is a <firstterm>pass-through</firstterm> pointer that is provided
by the application when the event handler is registered with a
- <structname>PGconn</structname>. The passthrough pointer never changes for the
+ <structname>PGconn</structname>. The pass-through pointer never changes for the
life of the <structname>PGconn</structname> and all <structname>PGresult</structname>s
generated from it; so if used, it must point to long-lived data.
In addition there is an <firstterm>instance data</firstterm> pointer, which starts
<xref linkend="libpq-PQsetInstanceData"/>,
<xref linkend="libpq-PQresultInstanceData"/> and
<function>PQsetResultInstanceData</function> functions. Note that
- unlike the passthrough pointer, instance data of a <structname>PGconn</structname>
+ unlike the pass-through pointer, instance data of a <structname>PGconn</structname>
is not automatically inherited by <structname>PGresult</structname>s created from
- it. <application>libpq</application> does not know what passthrough
+ it. <application>libpq</application> does not know what pass-through
and instance data pointers point to (if anything) and will never attempt
to free them — that is the responsibility of the event handler.
</para>
Similar to spill-to-disk behavior, streaming is triggered when the total
amount of changes decoded from the WAL (for all in-progress transactions)
exceeds the limit defined by <varname>logical_decoding_work_mem</varname> setting.
- At that point, the largest toplevel transaction (measured by the amount of memory
+ At that point, the largest top-level transaction (measured by the amount of memory
currently used for decoded changes) is selected and streamed. However, in
some cases we still have to spill to disk even if streaming is enabled
because we exceed the memory threshold but still have not decoded the
Number of transactions spilled to disk once the memory used by
logical decoding to decode changes from WAL has exceeded
<literal>logical_decoding_work_mem</literal>. The counter gets
- incremented for both toplevel transactions and subtransactions.
+ incremented for both top-level transactions and subtransactions.
</para></entry>
</row>
plugin after the memory used by logical decoding to decode changes
from WAL for this slot has exceeded
<literal>logical_decoding_work_mem</literal>. Streaming only
- works with toplevel transactions (subtransactions can't be streamed
+ works with top-level transactions (subtransactions can't be streamed
independently), so the counter is not incremented for subtransactions.
</para></entry>
</row>
</para>
<para>
Number of decoded transactions sent to the decoding output plugin for
- this slot. This counts toplevel transactions only, and is not incremented
+ this slot. This counts top-level transactions only, and is not incremented
for subtransactions. Note that this includes the transactions that are
streamed and/or spilled.
</para></entry>
The statistics gathered by the module are made available via a
view named <structname>pg_stat_statements</structname>. This view
contains one row for each distinct combination of database ID, user
- ID, query ID and whether it's a top level statement or not (up to
+ ID, query ID and whether it's a top-level statement or not (up to
the maximum number of distinct statements that the module can track).
The columns of the view are shown in
<xref linkend="pgstatstatements-columns"/>.
<structfield>toplevel</structfield> <type>bool</type>
</para>
<para>
- True if the query was executed as a top level statement
+ True if the query was executed as a top-level statement
(always true if <varname>pg_stat_statements.track</varname> is set to
<literal>top</literal>)
</para></entry>
</para>
<para>
If <literal>FINALIZE</literal> is specified, a previous
- <literal>DETACH CONCURRENTLY</literal> invocation that was cancelled or
+ <literal>DETACH CONCURRENTLY</literal> invocation that was canceled or
interrupted is completed.
At most one partition in a partitioned table can be pending detach at
a time.
</para>
<para>
The <command>\if</command> and <command>\elif</command> commands read
- their argument(s) and evaluate them as a boolean expression. If the
+ their argument(s) and evaluate them as a Boolean expression. If the
expression yields <literal>true</literal> then processing continues
normally; otherwise, lines are skipped until a
matching <command>\elif</command>, <command>\else</command>,
Previously it was <literal>md5</literal>. All new passwords will
be stored as SHA256 unless this server variable is changed or
the password is specified in md5 format. Also, the legacy (and
- undocumented) boolean-like values which were previously synonyms
+ undocumented) Boolean-like values which were previously synonyms
for <literal>md5</literal> are no longer accepted.
</para>
</listitem>
-->
<para>
- Allow an <literal>ECPG SQL</literal> identifier to be linked to
+ Allow an ECPG SQL identifier to be linked to
a specific connection (Hayato Kuroda)
</para>
<acronym>WAL</acronym> logs are stored in the directory
<filename>pg_wal</filename> under the data directory, as a set of
segment files, normally each 16 MB in size (but the size can be changed
- by altering the <option>--wal-segsize</option> initdb option). Each segment is
+ by altering the <option>--wal-segsize</option> <application>initdb</application> option). Each segment is
divided into pages, normally 8 kB each (this size can be changed via the
<option>--with-wal-blocksize</option> configure option). The log record headers
are described in <filename>access/xlogrecord.h</filename>; the record
projects / thirdparty / postgresql.git / commitdiff
