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Revert "psql: Show all query results by default"

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This reverts commit 3a51306722.

Per discussion, this patch had too many issues to resolve at this
point of the development cycle.  We'll try again in the future.

Discussion: https://www.postgresql.org/message-id/flat/alpine.DEB.2.21.1904132231510.8961@lancre
This commit is contained in:
Peter Eisentraut
2021-04-15 19:41:42 +02:00
parent e2e2efca85
commit fae65629ce
13 changed files with 302 additions and 606 deletions
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29
doc/src/sgml/ref/psql-ref.sgml
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@@ -127,11 +127,18 @@ echo '\x \\ SELECT * FROM foo;' | psql
commands included in the string to divide it into multiple
transactions. (See <xref linkend="protocol-flow-multi-statement"/>
for more details about how the server handles multi-query strings.)
Also, <application>psql</application> only prints the
result of the last <acronym>SQL</acronym> command in the string.
This is different from the behavior when the same string is read from
a file or fed to <application>psql</application>'s standard input,
because then <application>psql</application> sends
each <acronym>SQL</acronym> command separately.
</para>
<para>
If having several commands executed in one transaction is not desired,
use repeated <option>-c</option> commands or feed multiple commands to
<application>psql</application>'s standard input,
Because of this behavior, putting more than one SQL command in a
single <option>-c</option> string often has unexpected results.
It's better to use repeated <option>-c</option> commands or feed
multiple commands to <application>psql</application>'s standard input,
either using <application>echo</application> as illustrated above, or
via a shell here-document, for example:
<programlisting>
@@ -3525,6 +3532,10 @@ select 1\; select 2\; select 3;
commands included in the string to divide it into multiple
transactions. (See <xref linkend="protocol-flow-multi-statement"/>
for more details about how the server handles multi-query strings.)
<application>psql</application> prints only the last query result
it receives for each request; in this example, although all
three <command>SELECT</command>s are indeed executed, <application>psql</application>
only prints the <literal>3</literal>.
</para>
</listitem>
</varlistentry>
@@ -4111,18 +4122,6 @@ bar
</varlistentry>
<varlistentry>
<term><varname>SHOW_ALL_RESULTS</varname></term>
<listitem>
<para>
When this variable is set to <literal>off</literal>, only the last
result of a combined query (<literal>\;</literal>) is shown instead of
all of them. The default is <literal>on</literal>. The off behavior
is for compatibility with older versions of psql.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>SHOW_CONTEXT</varname></term>
<listitem>
<para>