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Meanwhile, database names with single quotes in names don't work very well
at all, and because of shell quoting rules this can't be fixed, so I put in error messages to that end. Also, calling create or drop database in a transaction block is not so good either, because the file system mysteriously refuses to roll back rm calls on transaction aborts. :) So I put in checks to see if a transaction is in progress and signal an error. Also I put the whole call in a transaction of its own to be able to roll back changes to pg_database in case the file system operations fail. The alternative location issues I posted recently were untouched, awaiting the outcome of that discussion. Other than that, this should be much more fool-proof now. The docs I cleaned up as well. Peter Eisentraut Sernanders väg 10:115
This commit is contained in:
Bruce Momjian
@@ -1,5 +1,5 @@
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<!--
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$Header: /cvsroot/pgsql/doc/src/sgml/ref/drop_database.sgml,v 1.8 1999/12/04 04:53:15 momjian Exp $
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$Header: /cvsroot/pgsql/doc/src/sgml/ref/drop_database.sgml,v 1.9 1999/12/12 05:15:09 momjian Exp $
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Postgres documentation
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-->
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@@ -15,12 +15,12 @@ Postgres documentation
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DROP DATABASE
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</refname>
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<refpurpose>
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Destroys an existing database
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Removes an existing database
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</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<refsynopsisdivinfo>
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<date>1999-07-20</date>
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<date>1999-12-11</date>
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</refsynopsisdivinfo>
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<synopsis>
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DROP DATABASE <replaceable class="PARAMETER">name</replaceable>
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@@ -28,7 +28,7 @@ DROP DATABASE <replaceable class="PARAMETER">name</replaceable>
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<refsect2 id="R2-SQL-DROPDATABASE-1">
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<refsect2info>
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<date>1998-04-15</date>
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<date>1999-12-11</date>
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</refsect2info>
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<title>
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Inputs
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@@ -49,7 +49,7 @@ DROP DATABASE <replaceable class="PARAMETER">name</replaceable>
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<refsect2 id="R2-SQL-DROPDATABASE-2">
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<refsect2info>
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<date>1998-04-15</date>
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<date>1999-12-11</date>
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</refsect2info>
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<title>
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Outputs
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@@ -57,36 +57,86 @@ DROP DATABASE <replaceable class="PARAMETER">name</replaceable>
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<para>
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<variablelist>
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<varlistentry>
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<term><computeroutput>
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DROP DATABASE
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</computeroutput></term>
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<term><computeroutput>DROP DATABASE</computeroutput></term>
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<listitem>
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<para>
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This message is returned if the command is successful.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><computeroutput>
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WARN: destroydb: database "<replaceable class="parameter">name</replaceable>" does not exist.
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</computeroutput></term>
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<term><computeroutput>ERROR: user '<replaceable class="parameter">username</replaceable>' is not allowed to create/drop databases</computeroutput></term>
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<listitem>
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<para>
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You must have the special CREATEDB privilege to drop databases.
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See <xref linkend="SQL-CREATEUSER" endterm="SQL-CREATEUSER-title">.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><computeroutput>ERROR: dropdb: cannot be executed on the template database</computeroutput></term>
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<listitem>
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<para>
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The <literal>template1</literal> database cannot be removed. It's not in
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your interest.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><computeroutput>ERROR: dropdb: cannot be executed on an open database</computeroutput></term>
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<listitem>
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<para>
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You cannot be connected to the the database your are about to remove.
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Instead, you could connect to <literal>template1</literal> or any other
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database and run this command again.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><computeroutput>ERROR: dropdb: database '<replaceable class="parameter">name</replaceable>' does not exist</computeroutput></term>
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<listitem>
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<para>
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This message occurs if the specified database does not exist.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><computeroutput>
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ERROR: destroydb cannot be executed on an open database
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</computeroutput></term>
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<term><computeroutput>ERROR: dropdb: database '<replaceable class="parameter">name</replaceable>' is not owned by you</computeroutput></term>
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<listitem>
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<para>
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This message occurs if the specified database does not exist.
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You must be the owner of the database. Being the owner usually means that
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you created it as well.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><computeroutput>ERROR: dropdb: May not be called in a transaction block.</computeroutput></term>
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<listitem>
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<para>
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You must finish the transaction in progress before you can call this command.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><computeroutput>NOTICE: The database directory 'xxx' could not be removed.</computeroutput></term>
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<listitem>
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<para>
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The database was dropped (unless other error messages came up), but the
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directory where the data is stored could not be removed. You must delete
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it manually.
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</para>
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</refsect2>
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@@ -94,7 +144,7 @@ WARN: destroydb: database "<replaceable class="parameter">name</replaceable>" do
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<refsect1 id="R1-SQL-DROPDATABASE-1">
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<refsect1info>
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<date>1998-04-15</date>
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<date>1999-12-11</date>
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</refsect1info>
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<title>
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Description
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@@ -102,23 +152,23 @@ WARN: destroydb: database "<replaceable class="parameter">name</replaceable>" do
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<para>
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<command>DROP DATABASE</command> removes the catalog entries for an existing
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database and deletes the directory containing the data.
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It can only be executed by the database administrator
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(See the <command>CREATE DATABASE</command> command for details).
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It can only be executed by the database owner (usually the user that created
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it).
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</para>
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<refsect2 id="R2-SQL-DROPDATABASE-3">
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<refsect2info>
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<date>1998-04-15</date>
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<date>1999-12-11</date>
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</refsect2info>
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<title>
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Notes
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</title>
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<para>
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This query cannot be executed while connected to the target
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database. Thus, it might be more convenient to use
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<xref linkend="app-dropdb" endterm="app-dropdb-title">
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from the shell instead.
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This command cannot be executed while connected to the target
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database. Thus, it might be more convenient to use the shell
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script <xref linkend="app-dropdb" endterm="app-dropdb-title">,
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which is a wrapper around this command, instead.
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</para>
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<para>
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