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Commit c59487c

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tglsfdctglsfdc
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Fix bogus markup.
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‎doc/src/sgml/ddl.sgml

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Original file line numberDiff line numberDiff line change
@@ -1,4 +1,4 @@
1-
<!-- $PostgreSQL: pgsql/doc/src/sgml/ddl.sgml,v 1.62 2006/09/20 01:20:38 neilc Exp $ -->
1+
<!-- $PostgreSQL: pgsql/doc/src/sgml/ddl.sgml,v 1.63 2006/09/20 21:30:20 tgl Exp $ -->
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33
<chapter id="ddl">
44
<title>Data Definition</title>
@@ -2478,20 +2478,20 @@ CREATE TABLE measurement_y2006m01 ( ) INHERITS (measurement);
24782478

24792479
<programlisting>
24802480
CREATE TABLE measurement_y2004m02 (
2481-
CHECK ( logdate >= DATE '2004-02-01' AND logdate < DATE '2004-03-01' )
2481+
CHECK ( logdate &gt;= DATE '2004-02-01' AND logdate &lt; DATE '2004-03-01' )
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) INHERITS (measurement);
24832483
CREATE TABLE measurement_y2004m03 (
2484-
CHECK ( logdate >= DATE '2004-03-01' AND logdate < DATE '2004-04-01' )
2484+
CHECK ( logdate &gt;= DATE '2004-03-01' AND logdate &lt; DATE '2004-04-01' )
24852485
) INHERITS (measurement);
24862486
...
24872487
CREATE TABLE measurement_y2005m11 (
2488-
CHECK ( logdate >= DATE '2005-11-01' AND logdate < DATE '2005-12-01' )
2488+
CHECK ( logdate &gt;= DATE '2005-11-01' AND logdate &lt; DATE '2005-12-01' )
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) INHERITS (measurement);
24902490
CREATE TABLE measurement_y2005m12 (
2491-
CHECK ( logdate >= DATE '2005-12-01' AND logdate < DATE '2006-01-01' )
2491+
CHECK ( logdate &gt;= DATE '2005-12-01' AND logdate &lt; DATE '2006-01-01' )
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) INHERITS (measurement);
24932493
CREATE TABLE measurement_y2006m01 (
2494-
CHECK ( logdate >= DATE '2006-01-01' AND logdate < DATE '2006-02-01' )
2494+
CHECK ( logdate &gt;= DATE '2006-01-01' AND logdate &lt; DATE '2006-02-01' )
24952495
) INHERITS (measurement);
24962496
</programlisting>
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</para>
@@ -2538,7 +2538,7 @@ DO INSTEAD
25382538
<programlisting>
25392539
CREATE RULE measurement_insert_y2004m02 AS
25402540
ON INSERT TO measurement WHERE
2541-
( logdate >= DATE '2004-02-01' AND logdate < DATE '2004-03-01' )
2541+
( logdate &gt;= DATE '2004-02-01' AND logdate &lt; DATE '2004-03-01' )
25422542
DO INSTEAD
25432543
INSERT INTO measurement_y2004m02 VALUES ( NEW.city_id,
25442544
NEW.logdate,
@@ -2547,15 +2547,15 @@ DO INSTEAD
25472547
...
25482548
CREATE RULE measurement_insert_y2005m12 AS
25492549
ON INSERT TO measurement WHERE
2550-
( logdate >= DATE '2005-12-01' AND logdate < DATE '2006-01-01' )
2550+
( logdate &gt;= DATE '2005-12-01' AND logdate &lt; DATE '2006-01-01' )
25512551
DO INSTEAD
25522552
INSERT INTO measurement_y2005m12 VALUES ( NEW.city_id,
25532553
NEW.logdate,
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NEW.peaktemp,
25552555
NEW.unitsales );
25562556
CREATE RULE measurement_insert_y2006m01 AS
25572557
ON INSERT TO measurement WHERE
2558-
( logdate >= DATE '2006-01-01' AND logdate < DATE '2006-02-01' )
2558+
( logdate &gt;= DATE '2006-01-01' AND logdate &lt; DATE '2006-02-01' )
25592559
DO INSTEAD
25602560
INSERT INTO measurement_y2006m01 VALUES ( NEW.city_id,
25612561
NEW.logdate,
@@ -2577,6 +2577,7 @@ DO INSTEAD
25772577
creating a new partition each month, so it may be wise to write a
25782578
script that generates the required DDL automatically.
25792579
</para>
2580+
</sect2>
25802581

25812582
<sect2 id="ddl-partitioning-managing-partitions">
25822583
<title>Managing Partitions</title>
@@ -2624,7 +2625,7 @@ ALTER TABLE measurement_y2003mm02 NO INHERIT measurement;
26242625

26252626
<programlisting>
26262627
CREATE TABLE measurement_y2006m02 (
2627-
CHECK ( logdate >= DATE '2006-02-01' AND logdate < DATE '2006-03-01' )
2628+
CHECK ( logdate &gt;= DATE '2006-02-01' AND logdate &lt; DATE '2006-03-01' )
26282629
) INHERITS (measurement);
26292630
</programlisting>
26302631

@@ -2637,7 +2638,7 @@ CREATE TABLE measurement_y2006m02 (
26372638
CREATE TABLE measurement_y2006m02 (LIKE measurement INCLUDING DEFAULTS INCLUDING CONSTRAINTS);
26382639
\COPY measurement_y2006m02 FROM 'measurement_y2006m02'
26392640
UPDATE ... ;
2640-
ALTER TABLE measurement_y2006m02 ADD CONSTRAINT y2006m02 CHECK ( logdate >= DATE '2006-02-01' AND logdate < DATE '2006-03-01' );
2641+
ALTER TABLE measurement_y2006m02 ADD CONSTRAINT y2006m02 CHECK ( logdate &gt;= DATE '2006-02-01' AND logdate &lt; DATE '2006-03-01' );
26412642
ALTER TABLE measurement_y2006m02 INHERIT measurement;
26422643
</programlisting>
26432644
</para>
@@ -2717,7 +2718,7 @@ UNION ALL SELECT * FROM measurement_y2006m01;
27172718

27182719
<programlisting>
27192720
SET constraint_exclusion = on;
2720-
SELECT count(*) FROM measurement WHERE logdate >= DATE '2006-01-01';
2721+
SELECT count(*) FROM measurement WHERE logdate &gt;= DATE '2006-01-01';
27212722
</programlisting>
27222723

27232724
Without constraint exclusion, the above query would scan each of
@@ -2736,23 +2737,23 @@ SELECT count(*) FROM measurement WHERE logdate >= DATE '2006-01-01';
27362737

27372738
<programlisting>
27382739
SET constraint_exclusion = off;
2739-
EXPLAIN SELECT count(*) FROM measurement WHERE logdate >= DATE '2006-01-01';
2740+
EXPLAIN SELECT count(*) FROM measurement WHERE logdate &gt;= DATE '2006-01-01';
27402741

27412742
QUERY PLAN
27422743
-----------------------------------------------------------------------------------------------
27432744
Aggregate (cost=158.66..158.68 rows=1 width=0)
2744-
-> Append (cost=0.00..151.88 rows=2715 width=0)
2745-
-> Seq Scan on measurement (cost=0.00..30.38 rows=543 width=0)
2746-
Filter: (logdate >= '2006-01-01'::date)
2747-
-> Seq Scan on measurement_y2004m02 measurement (cost=0.00..30.38 rows=543 width=0)
2748-
Filter: (logdate >= '2006-01-01'::date)
2749-
-> Seq Scan on measurement_y2004m03 measurement (cost=0.00..30.38 rows=543 width=0)
2750-
Filter: (logdate >= '2006-01-01'::date)
2745+
-&gt; Append (cost=0.00..151.88 rows=2715 width=0)
2746+
-&gt; Seq Scan on measurement (cost=0.00..30.38 rows=543 width=0)
2747+
Filter: (logdate &gt;= '2006-01-01'::date)
2748+
-&gt; Seq Scan on measurement_y2004m02 measurement (cost=0.00..30.38 rows=543 width=0)
2749+
Filter: (logdate &gt;= '2006-01-01'::date)
2750+
-&gt; Seq Scan on measurement_y2004m03 measurement (cost=0.00..30.38 rows=543 width=0)
2751+
Filter: (logdate &gt;= '2006-01-01'::date)
27512752
...
2752-
-> Seq Scan on measurement_y2005m12 measurement (cost=0.00..30.38 rows=543 width=0)
2753-
Filter: (logdate >= '2006-01-01'::date)
2754-
-> Seq Scan on measurement_y2006m01 measurement (cost=0.00..30.38 rows=543 width=0)
2755-
Filter: (logdate >= '2006-01-01'::date)
2753+
-&gt; Seq Scan on measurement_y2005m12 measurement (cost=0.00..30.38 rows=543 width=0)
2754+
Filter: (logdate &gt;= '2006-01-01'::date)
2755+
-&gt; Seq Scan on measurement_y2006m01 measurement (cost=0.00..30.38 rows=543 width=0)
2756+
Filter: (logdate &gt;= '2006-01-01'::date)
27562757
</programlisting>
27572758

27582759
Some or all of the partitions might use index scans instead of
@@ -2763,15 +2764,15 @@ EXPLAIN SELECT count(*) FROM measurement WHERE logdate >= DATE '2006-01-01';
27632764

27642765
<programlisting>
27652766
SET constraint_exclusion = on;
2766-
EXPLAIN SELECT count(*) FROM measurement WHERE logdate >= DATE '2006-01-01';
2767+
EXPLAIN SELECT count(*) FROM measurement WHERE logdate &gt;= DATE '2006-01-01';
27672768
QUERY PLAN
27682769
-----------------------------------------------------------------------------------------------
27692770
Aggregate (cost=63.47..63.48 rows=1 width=0)
2770-
-> Append (cost=0.00..60.75 rows=1086 width=0)
2771-
-> Seq Scan on measurement (cost=0.00..30.38 rows=543 width=0)
2772-
Filter: (logdate >= '2006-01-01'::date)
2773-
-> Seq Scan on measurement_y2006m01 measurement (cost=0.00..30.38 rows=543 width=0)
2774-
Filter: (logdate >= '2006-01-01'::date)
2771+
-&gt; Append (cost=0.00..60.75 rows=1086 width=0)
2772+
-&gt; Seq Scan on measurement (cost=0.00..30.38 rows=543 width=0)
2773+
Filter: (logdate &gt;= '2006-01-01'::date)
2774+
-&gt; Seq Scan on measurement_y2006m01 measurement (cost=0.00..30.38 rows=543 width=0)
2775+
Filter: (logdate &gt;= '2006-01-01'::date)
27752776
</programlisting>
27762777
</para>
27772778

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