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Commit1fd1bd8

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Transfer statistics during pg_upgrade.
Add support to pg_dump for dumping stats, and use that duringpg_upgrade so that statistics are transferred during upgrade. In mostcases this removes the need for a costly re-analyze after upgrade.Some statistics are not transferred, such as extended statistics orstatistics with a custom stakind.Now pg_dump accepts the options --schema-only, --no-schema,--data-only, --no-data, --statistics-only, and --no-statistics; whichallow all combinations of schema, data, and/or stats. The options arenamed this way to preserve compatibility with the previous--schema-only and --data-only options.Statistics are in SECTION_DATA, unless the object itself is inSECTION_POST_DATA.The stats are represented as calls to pg_restore_relation_stats() andpg_restore_attribute_stats().Author: Corey Huinker, Jeff DavisReviewed-by: Jian HeDiscussion:https://postgr.es/m/CADkLM=fzX7QX6r78fShWDjNN3Vcr4PVAnvXxQ4DiGy6V=0bCUA@mail.gmail.comDiscussion:https://postgr.es/m/CADkLM%3DcB0rF3p_FuWRTMSV0983ihTRpsH%2BOCpNyiqE7Wk0vUWA%40mail.gmail.com
1 parent7da344b commit1fd1bd8

22 files changed

+858
-75
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‎doc/src/sgml/ref/pg_dump.sgml

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<term><option>--data-only</option></term>
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<listitem>
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<para>
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Dump only the data, not the schema (data definitions).
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Dump only the data, not the schema (data definitions) or statistics.
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Table data, large objects, and sequence values are dumped.
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</para>
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<listitem>
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<para>
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Include large objects in the dump. This is the default behavior
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except when <option>--schema</option>, <option>--table</option>, or
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<option>--schema-only</option> is specified. The <option>-b</option>
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switch is therefore only useful to add large objects to dumps
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where a specific schema or table has been requested. Note that
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large objects are considered data and therefore will be included when
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<option>--data-only</option> is used, but not
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when <option>--schema-only</option> is.
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except when <option>--schema</option>, <option>--table</option>,
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<option>--schema-only</option>, <option>--statistics-only</option>, or
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<option>--no-data</option> is specified. The <option>-b</option>
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switch is therefore only useful to add large objects to dumps where a
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specific schema or table has been requested. Note that large objects
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are considered data and therefore will be included when
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<option>--data-only</option> is used, but not when
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<option>--schema-only</option> or <option>--statistics-only</option>
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is.
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</para>
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</listitem>
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</varlistentry>
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<term><option>--schema-only</option></term>
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<listitem>
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<para>
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Dump only the object definitions (schema), not data.
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Dump only the object definitions (schema), not data or statistics.
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</para>
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<para>
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This option is the inverse of <option>--data-only</option>.
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This option is mutually exclusive to <option>--data-only</option>
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and <option>--statistics-only</option>.
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It is similar to, but for historical reasons not identical to,
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specifying
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<option>--section=pre-data --section=post-data</option>.
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--statistics-only</option></term>
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<listitem>
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<para>
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Dump only the statistics, not the schema (data definitions) or data.
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Statistics for tables, materialized views, and indexes are dumped.
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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><option>-Z <replaceable class="parameter">level</replaceable></option></term>
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<term><option>-Z <replaceable class="parameter">method</replaceable></option>[:<replaceable>detail</replaceable>]</term>
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<term><option>--disable-triggers</option></term>
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<listitem>
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<para>
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This option is relevant only when creating a data-only dump.
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This option is relevant only when creating a dump that includes data
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but does not include schema.
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It instructs <application>pg_dump</application> to include commands
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to temporarily disable triggers on the target tables while
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the data is restored. Use this if you have referential
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though you do not need the data in it.
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</para>
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<para>
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To exclude data for all tables in the database, see <option>--schema-only</option>.
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To exclude data for all tables in the database, see <option>--schema-only</option>
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or <option>--statistics-only</option>.
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</para>
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</listitem>
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</varlistentry>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--no-data</option></term>
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<listitem>
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<para>
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Do not dump data.
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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><option>--no-publications</option></term>
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<listitem>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--no-schema</option></term>
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<listitem>
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<para>
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Do not dump schema (data definitions).
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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><option>--no-statistics</option></term>
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<listitem>
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<para>
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Do not dump statistics.
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</para>
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</listitem>
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</varlistentry>
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<term><option>--no-subscriptions</option></term>
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<listitem>
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</para>
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<para>
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The data section contains actual table data, large-object
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contents, and sequence values.
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contents, statitistics for tables and materialized views and
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sequence values.
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Post-data items include definitions of indexes, triggers, rules,
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and constraints other than validated check constraints.
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statistics for indexes, and constraints other than validated check
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constraints.
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Pre-data items include all other data definition items.
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</para>
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</para>
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<para>
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When adata-onlydump is chosen and the option <option>--disable-triggers</option>
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When a dump without schema is chosen and the option <option>--disable-triggers</option>
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is used, <application>pg_dump</application> emits commands
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to disable triggers on user tables before inserting the data,
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and then commands to re-enable them after the data has been

‎doc/src/sgml/ref/pg_dumpall.sgml

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<term><option>--data-only</option></term>
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<para>
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Dump only the data, not the schema (data definitions).
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Dump only the data, not the schema (data definitions) or statistics.
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</para>
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</varlistentry>
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</varlistentry>
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<varlistentry>
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<term><option>--statistics-only</option></term>
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<listitem>
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<para>
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Dump only the statistics, not the schema (data definitions) or data.
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Statistics for tables, materialized views, and indexes are dumped.
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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><option>--binary-upgrade</option></term>
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<term><option>--disable-triggers</option></term>
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<para>
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This option is relevant only when creating a data-only dump.
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This option is relevant only when creating adump withdata and without schema.
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It instructs <application>pg_dumpall</application> to include commands
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to temporarily disable triggers on the target tables while
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the data is restored. Use this if you have referential
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--no-data</option></term>
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<para>
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Do not dump data.
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</para>
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</listitem>
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</varlistentry>
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<term><option>--no-publications</option></term>
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<term><option>--no-schema</option></term>
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<para>
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Do not dump schema (data definitions).
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</para>
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</listitem>
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</varlistentry>
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<term><option>--no-security-labels</option></term>
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<varlistentry>
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<term><option>--no-statistics</option></term>
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<listitem>
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<para>
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Do not dump statistics.
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</para>
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</listitem>
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</varlistentry>
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<term><option>--no-subscriptions</option></term>
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‎doc/src/sgml/ref/pg_restore.sgml

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<term><option>--data-only</option></term>
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<para>
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Restore only the data, not the schema (data definitions).
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Restore only the data, not the schema (data definitions) or statistics.
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Table data, large objects, and sequence values are restored,
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if present in the archive.
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to the extent that schema entries are present in the archive.
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<para>
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This option is the inverse of <option>--data-only</option>.
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This option is mutually exclusive of <option>--data-only</option>
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and <option>--statistics-only</option>.
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It is similar to, but for historical reasons not identical to,
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specifying
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<option>--section=pre-data --section=post-data</option>.
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<option>--section=pre-data --section=post-data --no-statistics</option>.
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</para>
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<para>
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(Do not confuse this with the <option>--schema</option> option, which
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--statistics-only</option></term>
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<listitem>
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<para>
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Restore only the statistics, not schema (data definitions) or data.
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</para>
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</listitem>
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</varlistentry>
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<term><option>-1</option></term>
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<term><option>--single-transaction</option></term>
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<term><option>--disable-triggers</option></term>
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<listitem>
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<para>
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This option is relevant only when performing adata-onlyrestore.
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This option is relevant only when performing a restore without schema.
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It instructs <application>pg_restore</application> to execute commands
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to temporarily disable triggers on the target tables while
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the data is restored. Use this if you have referential
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</listitem>
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</varlistentry>
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<term><option>--no-data</option></term>
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<listitem>
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<para>
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Do not output commands to restore data, even if the archive
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contains them.
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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><option>--no-data-for-failed-tables</option></term>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--no-schema</option></term>
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<listitem>
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<para>
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Do not output commands to restore schema (data definitions), even if
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the archive contains them.
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</para>
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</listitem>
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</varlistentry>
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<term><option>--no-security-labels</option></term>
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</listitem>
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</varlistentry>
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<term><option>--no-statistics</option></term>
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<listitem>
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<para>
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Do not output commands to restore statistics, even if the archive
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contains them.
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</para>
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</listitem>
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</varlistentry>
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<term><option>--no-subscriptions</option></term>
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<listitem>

‎doc/src/sgml/ref/pgupgrade.sgml

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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--no-statistics</option></term>
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<listitem>
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<para>
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Do not restore statistics from the old cluster into the new cluster.
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</para>
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</listitem>
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</varlistentry>
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<term><option>-o</option> <replaceable class="parameter">options</replaceable></term>
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<term><option>--old-options</option> <replaceable class="parameter">options</replaceable></term>

‎src/bin/pg_dump/pg_backup.h

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/* flags derived from the user-settable flags */
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booldumpSchema;
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booldumpStatistics;
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}RestoreOptions;
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typedefstruct_dumpOptions
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/* flags derived from the user-settable flags */
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booldumpSchema;
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booldumpStatistics;
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}DumpOptions;
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/*

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