mirror of https://github.com/postgres/postgres
Fix bogus markup.
This commit is contained in:
Tom Lane
parent
f2aad31424
commit
c59487cfb3
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@ -1,4 +1,4 @@
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<!-- $PostgreSQL: pgsql/doc/src/sgml/ddl.sgml,v 1.62 2006/09/20 01:20:38 neilc Exp $ -->
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<!-- $PostgreSQL: pgsql/doc/src/sgml/ddl.sgml,v 1.63 2006/09/20 21:30:20 tgl Exp $ -->
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<chapter id="ddl">
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<title>Data Definition</title>
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@ -2478,20 +2478,20 @@ CREATE TABLE measurement_y2006m01 ( ) INHERITS (measurement);
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<programlisting>
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CREATE TABLE measurement_y2004m02 (
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CHECK ( logdate >= DATE '2004-02-01' AND logdate < DATE '2004-03-01' )
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CHECK ( logdate >= DATE '2004-02-01' AND logdate < DATE '2004-03-01' )
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) INHERITS (measurement);
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CREATE TABLE measurement_y2004m03 (
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CHECK ( logdate >= DATE '2004-03-01' AND logdate < DATE '2004-04-01' )
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CHECK ( logdate >= DATE '2004-03-01' AND logdate < DATE '2004-04-01' )
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) INHERITS (measurement);
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...
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CREATE TABLE measurement_y2005m11 (
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CHECK ( logdate >= DATE '2005-11-01' AND logdate < DATE '2005-12-01' )
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CHECK ( logdate >= DATE '2005-11-01' AND logdate < DATE '2005-12-01' )
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) INHERITS (measurement);
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CREATE TABLE measurement_y2005m12 (
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CHECK ( logdate >= DATE '2005-12-01' AND logdate < DATE '2006-01-01' )
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CHECK ( logdate >= DATE '2005-12-01' AND logdate < DATE '2006-01-01' )
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) INHERITS (measurement);
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CREATE TABLE measurement_y2006m01 (
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CHECK ( logdate >= DATE '2006-01-01' AND logdate < DATE '2006-02-01' )
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CHECK ( logdate >= DATE '2006-01-01' AND logdate < DATE '2006-02-01' )
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) INHERITS (measurement);
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</programlisting>
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</para>
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@ -2538,7 +2538,7 @@ DO INSTEAD
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<programlisting>
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CREATE RULE measurement_insert_y2004m02 AS
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ON INSERT TO measurement WHERE
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( logdate >= DATE '2004-02-01' AND logdate < DATE '2004-03-01' )
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( logdate >= DATE '2004-02-01' AND logdate < DATE '2004-03-01' )
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DO INSTEAD
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INSERT INTO measurement_y2004m02 VALUES ( NEW.city_id,
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NEW.logdate,
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@ -2547,7 +2547,7 @@ DO INSTEAD
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...
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CREATE RULE measurement_insert_y2005m12 AS
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ON INSERT TO measurement WHERE
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( logdate >= DATE '2005-12-01' AND logdate < DATE '2006-01-01' )
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( logdate >= DATE '2005-12-01' AND logdate < DATE '2006-01-01' )
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DO INSTEAD
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INSERT INTO measurement_y2005m12 VALUES ( NEW.city_id,
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NEW.logdate,
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@ -2555,7 +2555,7 @@ DO INSTEAD
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NEW.unitsales );
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CREATE RULE measurement_insert_y2006m01 AS
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ON INSERT TO measurement WHERE
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( logdate >= DATE '2006-01-01' AND logdate < DATE '2006-02-01' )
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( logdate >= DATE '2006-01-01' AND logdate < DATE '2006-02-01' )
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DO INSTEAD
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INSERT INTO measurement_y2006m01 VALUES ( NEW.city_id,
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NEW.logdate,
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@ -2577,6 +2577,7 @@ DO INSTEAD
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creating a new partition each month, so it may be wise to write a
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script that generates the required DDL automatically.
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</para>
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</sect2>
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<sect2 id="ddl-partitioning-managing-partitions">
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<title>Managing Partitions</title>
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@ -2624,7 +2625,7 @@ ALTER TABLE measurement_y2003mm02 NO INHERIT measurement;
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<programlisting>
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CREATE TABLE measurement_y2006m02 (
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CHECK ( logdate >= DATE '2006-02-01' AND logdate < DATE '2006-03-01' )
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CHECK ( logdate >= DATE '2006-02-01' AND logdate < DATE '2006-03-01' )
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) INHERITS (measurement);
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</programlisting>
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@ -2637,7 +2638,7 @@ CREATE TABLE measurement_y2006m02 (
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CREATE TABLE measurement_y2006m02 (LIKE measurement INCLUDING DEFAULTS INCLUDING CONSTRAINTS);
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\COPY measurement_y2006m02 FROM 'measurement_y2006m02'
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UPDATE ... ;
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ALTER TABLE measurement_y2006m02 ADD CONSTRAINT y2006m02 CHECK ( logdate >= DATE '2006-02-01' AND logdate < DATE '2006-03-01' );
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ALTER TABLE measurement_y2006m02 ADD CONSTRAINT y2006m02 CHECK ( logdate >= DATE '2006-02-01' AND logdate < DATE '2006-03-01' );
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ALTER TABLE measurement_y2006m02 INHERIT measurement;
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</programlisting>
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</para>
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@ -2717,7 +2718,7 @@ UNION ALL SELECT * FROM measurement_y2006m01;
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<programlisting>
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SET constraint_exclusion = on;
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SELECT count(*) FROM measurement WHERE logdate >= DATE '2006-01-01';
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SELECT count(*) FROM measurement WHERE logdate >= DATE '2006-01-01';
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</programlisting>
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Without constraint exclusion, the above query would scan each of
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@ -2736,23 +2737,23 @@ SELECT count(*) FROM measurement WHERE logdate >= DATE '2006-01-01';
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<programlisting>
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SET constraint_exclusion = off;
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EXPLAIN SELECT count(*) FROM measurement WHERE logdate >= DATE '2006-01-01';
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EXPLAIN SELECT count(*) FROM measurement WHERE logdate >= DATE '2006-01-01';
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QUERY PLAN
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-----------------------------------------------------------------------------------------------
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Aggregate (cost=158.66..158.68 rows=1 width=0)
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-> Append (cost=0.00..151.88 rows=2715 width=0)
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-> Seq Scan on measurement (cost=0.00..30.38 rows=543 width=0)
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Filter: (logdate >= '2006-01-01'::date)
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-> Seq Scan on measurement_y2004m02 measurement (cost=0.00..30.38 rows=543 width=0)
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Filter: (logdate >= '2006-01-01'::date)
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-> Seq Scan on measurement_y2004m03 measurement (cost=0.00..30.38 rows=543 width=0)
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Filter: (logdate >= '2006-01-01'::date)
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-> Append (cost=0.00..151.88 rows=2715 width=0)
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-> Seq Scan on measurement (cost=0.00..30.38 rows=543 width=0)
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Filter: (logdate >= '2006-01-01'::date)
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-> Seq Scan on measurement_y2004m02 measurement (cost=0.00..30.38 rows=543 width=0)
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Filter: (logdate >= '2006-01-01'::date)
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-> Seq Scan on measurement_y2004m03 measurement (cost=0.00..30.38 rows=543 width=0)
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Filter: (logdate >= '2006-01-01'::date)
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...
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-> Seq Scan on measurement_y2005m12 measurement (cost=0.00..30.38 rows=543 width=0)
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Filter: (logdate >= '2006-01-01'::date)
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-> Seq Scan on measurement_y2006m01 measurement (cost=0.00..30.38 rows=543 width=0)
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Filter: (logdate >= '2006-01-01'::date)
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-> Seq Scan on measurement_y2005m12 measurement (cost=0.00..30.38 rows=543 width=0)
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Filter: (logdate >= '2006-01-01'::date)
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-> Seq Scan on measurement_y2006m01 measurement (cost=0.00..30.38 rows=543 width=0)
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Filter: (logdate >= '2006-01-01'::date)
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</programlisting>
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Some or all of the partitions might use index scans instead of
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@ -2763,15 +2764,15 @@ EXPLAIN SELECT count(*) FROM measurement WHERE logdate >= DATE '2006-01-01';
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<programlisting>
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SET constraint_exclusion = on;
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EXPLAIN SELECT count(*) FROM measurement WHERE logdate >= DATE '2006-01-01';
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EXPLAIN SELECT count(*) FROM measurement WHERE logdate >= DATE '2006-01-01';
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QUERY PLAN
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-----------------------------------------------------------------------------------------------
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Aggregate (cost=63.47..63.48 rows=1 width=0)
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-> Append (cost=0.00..60.75 rows=1086 width=0)
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-> Seq Scan on measurement (cost=0.00..30.38 rows=543 width=0)
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Filter: (logdate >= '2006-01-01'::date)
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-> Seq Scan on measurement_y2006m01 measurement (cost=0.00..30.38 rows=543 width=0)
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Filter: (logdate >= '2006-01-01'::date)
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-> Append (cost=0.00..60.75 rows=1086 width=0)
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-> Seq Scan on measurement (cost=0.00..30.38 rows=543 width=0)
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Filter: (logdate >= '2006-01-01'::date)
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-> Seq Scan on measurement_y2006m01 measurement (cost=0.00..30.38 rows=543 width=0)
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Filter: (logdate >= '2006-01-01'::date)
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</programlisting>
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</para>
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