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BRIN minmax-multi indexes
Adds BRIN opclasses similar to the existing minmax, except that instead of summarizing the page range into a single [min,max] range, the summary consists of multiple ranges and/or points, allowing gaps. This allows more efficient handling of data with poor correlation to physical location within the table and/or outlier values, for which the regular minmax opclassed tend to work poorly. It's possible to specify the number of values kept for each page range, either as a single point or an interval boundary. CREATE TABLE t (a int); CREATE INDEX ON t USING brin (a int4_minmax_multi_ops(values_per_range=16)); When building the summary, the values are combined into intervals with the goal to minimize the "covering" (sum of interval lengths), using a support procedure computing distance between two values. Bump catversion, due to various catalog changes. Author: Tomas Vondra <tomas.vondra@postgresql.org> Reviewed-by: Alvaro Herrera <alvherre@alvh.no-ip.org> Reviewed-by: Alexander Korotkov <aekorotkov@gmail.com> Reviewed-by: Sokolov Yura <y.sokolov@postgrespro.ru> Reviewed-by: John Naylor <john.naylor@enterprisedb.com> Discussion: https://postgr.es/m/c1138ead-7668-f0e1-0638-c3be3237e812@2ndquadrant.com Discussion: https://postgr.es/m/5d78b774-7e9c-c94e-12cf-fef51cc89b1a%402ndquadrant.com
This commit is contained in:
Tomas Vondra
@ -116,7 +116,10 @@ LOG: request for BRIN range summarization for index "brin_wi_idx" page 128 was
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in the indexed column within the range. The <firstterm>inclusion</firstterm>
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operator classes store a value which includes the values in the indexed
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column within the range. The <firstterm>bloom</firstterm> operator
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classes build a Bloom filter for all values in the range.
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classes build a Bloom filter for all values in the range. The
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<firstterm>minmax-multi</firstterm> operator classes store multiple
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minimum and maximum values, representing values appearing in the indexed
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column within the range.
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</para>
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<table id="brin-builtin-opclasses-table">
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@ -211,6 +214,15 @@ LOG: request for BRIN range summarization for index "brin_wi_idx" page 128 was
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<row><entry><literal>> (date,date)</literal></entry></row>
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<row><entry><literal>>= (date,date)</literal></entry></row>
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<row>
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<entry valign="middle" morerows="4"><literal>date_minmax_multi_ops</literal></entry>
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<entry><literal>= (date,date)</literal></entry>
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</row>
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<row><entry><literal>< (date,date)</literal></entry></row>
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<row><entry><literal><= (date,date)</literal></entry></row>
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<row><entry><literal>> (date,date)</literal></entry></row>
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<row><entry><literal>>= (date,date)</literal></entry></row>
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<row>
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<entry valign="middle"><literal>float4_bloom_ops</literal></entry>
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<entry><literal>= (float4,float4)</literal></entry>
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@ -225,6 +237,15 @@ LOG: request for BRIN range summarization for index "brin_wi_idx" page 128 was
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<row><entry><literal><= (float4,float4)</literal></entry></row>
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<row><entry><literal>>= (float4,float4)</literal></entry></row>
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<row>
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<entry valign="middle" morerows="4"><literal>float4_minmax_multi_ops</literal></entry>
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<entry><literal>= (float4,float4)</literal></entry>
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</row>
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<row><entry><literal>< (float4,float4)</literal></entry></row>
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<row><entry><literal>> (float4,float4)</literal></entry></row>
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<row><entry><literal><= (float4,float4)</literal></entry></row>
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<row><entry><literal>>= (float4,float4)</literal></entry></row>
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<row>
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<entry valign="middle"><literal>float8_bloom_ops</literal></entry>
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<entry><literal>= (float8,float8)</literal></entry>
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@ -239,6 +260,15 @@ LOG: request for BRIN range summarization for index "brin_wi_idx" page 128 was
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<row><entry><literal>> (float8,float8)</literal></entry></row>
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<row><entry><literal>>= (float8,float8)</literal></entry></row>
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<row>
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<entry valign="middle" morerows="4"><literal>float8_minmax_multi_ops</literal></entry>
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<entry><literal>= (float8,float8)</literal></entry>
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</row>
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<row><entry><literal>< (float8,float8)</literal></entry></row>
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<row><entry><literal><= (float8,float8)</literal></entry></row>
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<row><entry><literal>> (float8,float8)</literal></entry></row>
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<row><entry><literal>>= (float8,float8)</literal></entry></row>
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<row>
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<entry valign="middle" morerows="5"><literal>inet_inclusion_ops</literal></entry>
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<entry><literal><< (inet,inet)</literal></entry>
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@ -263,6 +293,15 @@ LOG: request for BRIN range summarization for index "brin_wi_idx" page 128 was
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<row><entry><literal>> (inet,inet)</literal></entry></row>
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<row><entry><literal>>= (inet,inet)</literal></entry></row>
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<row>
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<entry valign="middle" morerows="4"><literal>inet_minmax_multi_ops</literal></entry>
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<entry><literal>= (inet,inet)</literal></entry>
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</row>
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<row><entry><literal>< (inet,inet)</literal></entry></row>
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<row><entry><literal><= (inet,inet)</literal></entry></row>
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<row><entry><literal>> (inet,inet)</literal></entry></row>
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<row><entry><literal>>= (inet,inet)</literal></entry></row>
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<row>
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<entry valign="middle"><literal>int2_bloom_ops</literal></entry>
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<entry><literal>= (int2,int2)</literal></entry>
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@ -277,6 +316,15 @@ LOG: request for BRIN range summarization for index "brin_wi_idx" page 128 was
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<row><entry><literal><= (int2,int2)</literal></entry></row>
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<row><entry><literal>>= (int2,int2)</literal></entry></row>
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<row>
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<entry valign="middle" morerows="4"><literal>int2_minmax_multi_ops</literal></entry>
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<entry><literal>= (int2,int2)</literal></entry>
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</row>
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<row><entry><literal>< (int2,int2)</literal></entry></row>
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<row><entry><literal>> (int2,int2)</literal></entry></row>
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<row><entry><literal><= (int2,int2)</literal></entry></row>
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<row><entry><literal>>= (int2,int2)</literal></entry></row>
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<row>
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<entry valign="middle"><literal>int4_bloom_ops</literal></entry>
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<entry><literal>= (int4,int4)</literal></entry>
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@ -291,6 +339,15 @@ LOG: request for BRIN range summarization for index "brin_wi_idx" page 128 was
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<row><entry><literal><= (int4,int4)</literal></entry></row>
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<row><entry><literal>>= (int4,int4)</literal></entry></row>
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<row>
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<entry valign="middle" morerows="4"><literal>int4_minmax_multi_ops</literal></entry>
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<entry><literal>= (int4,int4)</literal></entry>
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</row>
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<row><entry><literal>< (int4,int4)</literal></entry></row>
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<row><entry><literal>> (int4,int4)</literal></entry></row>
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<row><entry><literal><= (int4,int4)</literal></entry></row>
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<row><entry><literal>>= (int4,int4)</literal></entry></row>
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<row>
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<entry valign="middle"><literal>int8_bloom_ops</literal></entry>
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<entry><literal>= (bigint,bigint)</literal></entry>
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@ -305,6 +362,15 @@ LOG: request for BRIN range summarization for index "brin_wi_idx" page 128 was
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<row><entry><literal><= (bigint,bigint)</literal></entry></row>
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<row><entry><literal>>= (bigint,bigint)</literal></entry></row>
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<row>
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<entry valign="middle" morerows="4"><literal>int8_minmax_multi_ops</literal></entry>
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<entry><literal>= (bigint,bigint)</literal></entry>
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</row>
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<row><entry><literal>< (bigint,bigint)</literal></entry></row>
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<row><entry><literal>> (bigint,bigint)</literal></entry></row>
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<row><entry><literal><= (bigint,bigint)</literal></entry></row>
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<row><entry><literal>>= (bigint,bigint)</literal></entry></row>
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<row>
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<entry valign="middle"><literal>interval_bloom_ops</literal></entry>
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<entry><literal>= (interval,interval)</literal></entry>
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@ -319,6 +385,15 @@ LOG: request for BRIN range summarization for index "brin_wi_idx" page 128 was
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<row><entry><literal>> (interval,interval)</literal></entry></row>
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<row><entry><literal>>= (interval,interval)</literal></entry></row>
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<row>
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<entry valign="middle" morerows="4"><literal>interval_minmax_multi_ops</literal></entry>
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<entry><literal>= (interval,interval)</literal></entry>
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</row>
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<row><entry><literal>< (interval,interval)</literal></entry></row>
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<row><entry><literal><= (interval,interval)</literal></entry></row>
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<row><entry><literal>> (interval,interval)</literal></entry></row>
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<row><entry><literal>>= (interval,interval)</literal></entry></row>
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<row>
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<entry valign="middle"><literal>macaddr_bloom_ops</literal></entry>
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<entry><literal>= (macaddr,macaddr)</literal></entry>
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@ -333,6 +408,15 @@ LOG: request for BRIN range summarization for index "brin_wi_idx" page 128 was
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<row><entry><literal>> (macaddr,macaddr)</literal></entry></row>
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<row><entry><literal>>= (macaddr,macaddr)</literal></entry></row>
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<row>
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<entry valign="middle" morerows="4"><literal>macaddr_minmax_multi_ops</literal></entry>
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<entry><literal>= (macaddr,macaddr)</literal></entry>
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</row>
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<row><entry><literal>< (macaddr,macaddr)</literal></entry></row>
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<row><entry><literal><= (macaddr,macaddr)</literal></entry></row>
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<row><entry><literal>> (macaddr,macaddr)</literal></entry></row>
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<row><entry><literal>>= (macaddr,macaddr)</literal></entry></row>
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<row>
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<entry valign="middle"><literal>macaddr8_bloom_ops</literal></entry>
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<entry><literal>= (macaddr8,macaddr8)</literal></entry>
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@ -347,6 +431,15 @@ LOG: request for BRIN range summarization for index "brin_wi_idx" page 128 was
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<row><entry><literal>> (macaddr8,macaddr8)</literal></entry></row>
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<row><entry><literal>>= (macaddr8,macaddr8)</literal></entry></row>
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<row>
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<entry valign="middle" morerows="4"><literal>macaddr8_minmax_multi_ops</literal></entry>
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<entry><literal>= (macaddr8,macaddr8)</literal></entry>
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</row>
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<row><entry><literal>< (macaddr8,macaddr8)</literal></entry></row>
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<row><entry><literal><= (macaddr8,macaddr8)</literal></entry></row>
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<row><entry><literal>> (macaddr8,macaddr8)</literal></entry></row>
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<row><entry><literal>>= (macaddr8,macaddr8)</literal></entry></row>
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<row>
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<entry valign="middle"><literal>name_bloom_ops</literal></entry>
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<entry><literal>= (name,name)</literal></entry>
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@ -375,6 +468,15 @@ LOG: request for BRIN range summarization for index "brin_wi_idx" page 128 was
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<row><entry><literal>> (numeric,numeric)</literal></entry></row>
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<row><entry><literal>>= (numeric,numeric)</literal></entry></row>
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<row>
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<entry valign="middle" morerows="4"><literal>numeric_minmax_multi_ops</literal></entry>
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<entry><literal>= (numeric,numeric)</literal></entry>
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</row>
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<row><entry><literal>< (numeric,numeric)</literal></entry></row>
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<row><entry><literal><= (numeric,numeric)</literal></entry></row>
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<row><entry><literal>> (numeric,numeric)</literal></entry></row>
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<row><entry><literal>>= (numeric,numeric)</literal></entry></row>
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<row>
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<entry valign="middle"><literal>oid_bloom_ops</literal></entry>
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<entry><literal>= (oid,oid)</literal></entry>
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@ -389,6 +491,15 @@ LOG: request for BRIN range summarization for index "brin_wi_idx" page 128 was
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<row><entry><literal><= (oid,oid)</literal></entry></row>
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<row><entry><literal>>= (oid,oid)</literal></entry></row>
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<row>
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<entry valign="middle" morerows="4"><literal>oid_minmax_multi_ops</literal></entry>
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<entry><literal>= (oid,oid)</literal></entry>
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</row>
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<row><entry><literal>< (oid,oid)</literal></entry></row>
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<row><entry><literal>> (oid,oid)</literal></entry></row>
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<row><entry><literal><= (oid,oid)</literal></entry></row>
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<row><entry><literal>>= (oid,oid)</literal></entry></row>
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<row>
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<entry valign="middle"><literal>pg_lsn_bloom_ops</literal></entry>
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<entry><literal>= (pg_lsn,pg_lsn)</literal></entry>
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@ -403,6 +514,15 @@ LOG: request for BRIN range summarization for index "brin_wi_idx" page 128 was
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<row><entry><literal><= (pg_lsn,pg_lsn)</literal></entry></row>
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<row><entry><literal>>= (pg_lsn,pg_lsn)</literal></entry></row>
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<row>
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<entry valign="middle" morerows="4"><literal>pg_lsn_minmax_multi_ops</literal></entry>
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<entry><literal>= (pg_lsn,pg_lsn)</literal></entry>
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</row>
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<row><entry><literal>< (pg_lsn,pg_lsn)</literal></entry></row>
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<row><entry><literal>> (pg_lsn,pg_lsn)</literal></entry></row>
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<row><entry><literal><= (pg_lsn,pg_lsn)</literal></entry></row>
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<row><entry><literal>>= (pg_lsn,pg_lsn)</literal></entry></row>
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<row>
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<entry valign="middle" morerows="13"><literal>range_inclusion_ops</literal></entry>
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<entry><literal>= (anyrange,anyrange)</literal></entry>
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@ -449,6 +569,15 @@ LOG: request for BRIN range summarization for index "brin_wi_idx" page 128 was
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<row><entry><literal><= (tid,tid)</literal></entry></row>
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<row><entry><literal>>= (tid,tid)</literal></entry></row>
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<row>
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<entry valign="middle" morerows="4"><literal>tid_minmax_multi_ops</literal></entry>
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<entry><literal>= (tid,tid)</literal></entry>
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</row>
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<row><entry><literal>< (tid,tid)</literal></entry></row>
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<row><entry><literal>> (tid,tid)</literal></entry></row>
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<row><entry><literal><= (tid,tid)</literal></entry></row>
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<row><entry><literal>>= (tid,tid)</literal></entry></row>
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<row>
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<entry valign="middle"><literal>timestamp_bloom_ops</literal></entry>
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<entry><literal>= (timestamp,timestamp)</literal></entry>
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@ -463,6 +592,15 @@ LOG: request for BRIN range summarization for index "brin_wi_idx" page 128 was
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<row><entry><literal>> (timestamp,timestamp)</literal></entry></row>
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<row><entry><literal>>= (timestamp,timestamp)</literal></entry></row>
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<row>
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<entry valign="middle" morerows="4"><literal>timestamp_minmax_multi_ops</literal></entry>
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<entry><literal>= (timestamp,timestamp)</literal></entry>
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</row>
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<row><entry><literal>< (timestamp,timestamp)</literal></entry></row>
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<row><entry><literal><= (timestamp,timestamp)</literal></entry></row>
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<row><entry><literal>> (timestamp,timestamp)</literal></entry></row>
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<row><entry><literal>>= (timestamp,timestamp)</literal></entry></row>
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<row>
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<entry valign="middle"><literal>timestamptz_bloom_ops</literal></entry>
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<entry><literal>= (timestamptz,timestamptz)</literal></entry>
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@ -477,6 +615,15 @@ LOG: request for BRIN range summarization for index "brin_wi_idx" page 128 was
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<row><entry><literal>> (timestamptz,timestamptz)</literal></entry></row>
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<row><entry><literal>>= (timestamptz,timestamptz)</literal></entry></row>
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<row>
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<entry valign="middle" morerows="4"><literal>timestamptz_minmax_multi_ops</literal></entry>
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<entry><literal>= (timestamptz,timestamptz)</literal></entry>
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</row>
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<row><entry><literal>< (timestamptz,timestamptz)</literal></entry></row>
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<row><entry><literal><= (timestamptz,timestamptz)</literal></entry></row>
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<row><entry><literal>> (timestamptz,timestamptz)</literal></entry></row>
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<row><entry><literal>>= (timestamptz,timestamptz)</literal></entry></row>
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<row>
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<entry valign="middle"><literal>time_bloom_ops</literal></entry>
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<entry><literal>= (time,time)</literal></entry>
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<row><entry><literal>> (time,time)</literal></entry></row>
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<row><entry><literal>>= (time,time)</literal></entry></row>
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<row>
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<entry valign="middle" morerows="4"><literal>time_minmax_multi_ops</literal></entry>
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<entry><literal>= (time,time)</literal></entry>
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</row>
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<row><entry><literal>< (time,time)</literal></entry></row>
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<row><entry><literal><= (time,time)</literal></entry></row>
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<row><entry><literal>> (time,time)</literal></entry></row>
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<row><entry><literal>>= (time,time)</literal></entry></row>
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<row>
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<entry valign="middle"><literal>timetz_bloom_ops</literal></entry>
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<entry><literal>= (timetz,timetz)</literal></entry>
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<row><entry><literal>> (timetz,timetz)</literal></entry></row>
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<row><entry><literal>>= (timetz,timetz)</literal></entry></row>
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<row>
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<entry valign="middle" morerows="4"><literal>timetz_minmax_multi_ops</literal></entry>
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<entry><literal>= (timetz,timetz)</literal></entry>
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</row>
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<row><entry><literal>< (timetz,timetz)</literal></entry></row>
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<row><entry><literal><= (timetz,timetz)</literal></entry></row>
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<row><entry><literal>> (timetz,timetz)</literal></entry></row>
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<row><entry><literal>>= (timetz,timetz)</literal></entry></row>
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<row>
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<entry valign="middle"><literal>uuid_bloom_ops</literal></entry>
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<entry><literal>= (uuid,uuid)</literal></entry>
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<row><entry><literal><= (uuid,uuid)</literal></entry></row>
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<row><entry><literal>>= (uuid,uuid)</literal></entry></row>
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<row>
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<entry valign="middle" morerows="4"><literal>uuid_minmax_multi_ops</literal></entry>
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<entry><literal>= (uuid,uuid)</literal></entry>
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</row>
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<row><entry><literal>< (uuid,uuid)</literal></entry></row>
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<row><entry><literal>> (uuid,uuid)</literal></entry></row>
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<row><entry><literal><= (uuid,uuid)</literal></entry></row>
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||||
<row><entry><literal>>= (uuid,uuid)</literal></entry></row>
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<row>
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<entry valign="middle" morerows="4"><literal>varbit_minmax_ops</literal></entry>
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<entry><literal>= (varbit,varbit)</literal></entry>
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@ -537,8 +711,8 @@ LOG: request for BRIN range summarization for index "brin_wi_idx" page 128 was
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<para>
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Some of the built-in operator classes allow specifying parameters affecting
|
||||
behavior of the operator class. Each operator class has its own set of
|
||||
allowed parameters. Only the <literal>bloom</literal> operator class
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allows specifying parameters:
|
||||
allowed parameters. Only the <literal>bloom</literal> and <literal>minmax-multi</literal>
|
||||
operator classes allow specifying parameters:
|
||||
</para>
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<para>
|
||||
@ -577,6 +751,25 @@ LOG: request for BRIN range summarization for index "brin_wi_idx" page 128 was
|
||||
</varlistentry>
|
||||
|
||||
</variablelist>
|
||||
|
||||
<para>
|
||||
<acronym>minmax-multi</acronym> operator classes accept these parameters:
|
||||
</para>
|
||||
|
||||
<variablelist>
|
||||
<varlistentry>
|
||||
<term><literal>values_per_range</literal></term>
|
||||
<listitem>
|
||||
<para>
|
||||
Defines the maximum number of values stored by <acronym>BRIN</acronym>
|
||||
minmax indexes to summarize a block range. Each value may represent
|
||||
either a point, or a boundary of an interval. Values must be between
|
||||
8 and 256, and the default value is 32.
|
||||
</para>
|
||||
</listitem>
|
||||
</varlistentry>
|
||||
|
||||
</variablelist>
|
||||
</sect2>
|
||||
|
||||
</sect1>
|
||||
@ -715,13 +908,14 @@ typedef struct BrinOpcInfo
|
||||
</varlistentry>
|
||||
</variablelist>
|
||||
|
||||
The core distribution includes support for two types of operator classes:
|
||||
minmax and inclusion. Operator class definitions using them are shipped for
|
||||
in-core data types as appropriate. Additional operator classes can be
|
||||
defined by the user for other data types using equivalent definitions,
|
||||
without having to write any source code; appropriate catalog entries being
|
||||
declared is enough. Note that assumptions about the semantics of operator
|
||||
strategies are embedded in the support functions' source code.
|
||||
The core distribution includes support for four types of operator classes:
|
||||
minmax, minmax-multi, inclusion and bloom. Operator class definitions
|
||||
using them are shipped for in-core data types as appropriate. Additional
|
||||
operator classes can be defined by the user for other data types using
|
||||
equivalent definitions, without having to write any source code;
|
||||
appropriate catalog entries being declared is enough. Note that
|
||||
assumptions about the semantics of operator strategies are embedded in the
|
||||
support functions' source code.
|
||||
</para>
|
||||
|
||||
<para>
|
||||
@ -1018,6 +1212,72 @@ typedef struct BrinOpcInfo
|
||||
and return a hash of the value.
|
||||
</para>
|
||||
|
||||
<para>
|
||||
The minmax-multi operator class is also intended for data types implementing
|
||||
a totally ordered sets, and may be seen as a simple extension of the minmax
|
||||
operator class. While minmax operator class summarizes values from each block
|
||||
range into a single contiguous interval, minmax-multi allows summarization
|
||||
into multiple smaller intervals to improve handling of outlier values.
|
||||
It is possible to use the minmax-multi support procedures alongside the
|
||||
corresponding operators, as shown in
|
||||
<xref linkend="brin-extensibility-minmax-multi-table"/>.
|
||||
All operator class members (procedures and operators) are mandatory.
|
||||
</para>
|
||||
|
||||
<table id="brin-extensibility-minmax-multi-table">
|
||||
<title>Procedure and Support Numbers for minmax-multi Operator Classes</title>
|
||||
<tgroup cols="2">
|
||||
<thead>
|
||||
<row>
|
||||
<entry>Operator class member</entry>
|
||||
<entry>Object</entry>
|
||||
</row>
|
||||
</thead>
|
||||
<tbody>
|
||||
<row>
|
||||
<entry>Support Procedure 1</entry>
|
||||
<entry>internal function <function>brin_minmax_multi_opcinfo()</function></entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>Support Procedure 2</entry>
|
||||
<entry>internal function <function>brin_minmax_multi_add_value()</function></entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>Support Procedure 3</entry>
|
||||
<entry>internal function <function>brin_minmax_multi_consistent()</function></entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>Support Procedure 4</entry>
|
||||
<entry>internal function <function>brin_minmax_multi_union()</function></entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>Support Procedure 11</entry>
|
||||
<entry>function to compute distance between two values (length of a range)</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>Operator Strategy 1</entry>
|
||||
<entry>operator less-than</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>Operator Strategy 2</entry>
|
||||
<entry>operator less-than-or-equal-to</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>Operator Strategy 3</entry>
|
||||
<entry>operator equal-to</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>Operator Strategy 4</entry>
|
||||
<entry>operator greater-than-or-equal-to</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>Operator Strategy 5</entry>
|
||||
<entry>operator greater-than</entry>
|
||||
</row>
|
||||
</tbody>
|
||||
</tgroup>
|
||||
</table>
|
||||
|
||||
<para>
|
||||
Both minmax and inclusion operator classes support cross-data-type
|
||||
operators, though with these the dependencies become more complicated.
|
||||
|
||||
Reference in New Issue
Block a user