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Spell checking, consistent terminology.
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@@ -1,4 +1,4 @@
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<!-- $Header: /cvsroot/pgsql/doc/src/sgml/ddl.sgml,v 1.20 2003/10/28 20:18:09 tgl Exp $ -->
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<!-- $Header: /cvsroot/pgsql/doc/src/sgml/ddl.sgml,v 1.21 2003/11/01 01:56:29 petere Exp $ -->
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<chapter id="ddl">
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<title>Data Definition</title>
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@@ -230,9 +230,9 @@ DROP TABLE products;
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<para>
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The identity (transaction ID) of the inserting transaction for
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this tuple. (Note: In this context, a tuple is an individual
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state of a row; each update of a row creates a new tuple for the
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same logical row.)
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this row version. (A row version is an individual state of a
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row; each update of a row creates a new row version for the same
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logical row.)
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</para>
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</listitem>
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</varlistentry>
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@@ -260,8 +260,8 @@ DROP TABLE products;
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<para>
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The identity (transaction ID) of the deleting transaction, or
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zero for an undeleted tuple. It is possible for this column to
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be nonzero in a visible tuple: That usually indicates that the
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zero for an undeleted row version. It is possible for this column to
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be nonzero in a visible row version: That usually indicates that the
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deleting transaction hasn't committed yet, or that an attempted
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deletion was rolled back.
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</para>
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@@ -289,9 +289,9 @@ DROP TABLE products;
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</indexterm>
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<para>
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The physical location of the tuple within its table. Note that
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The physical location of the row version within its table. Note that
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although the <structfield>ctid</structfield> can be used to
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locate the tuple very quickly, a row's
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locate the row version very quickly, a row's
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<structfield>ctid</structfield> will change each time it is
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updated or moved by <command>VACUUM FULL</>. Therefore
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<structfield>ctid</structfield> is useless as a long-term row
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@@ -332,7 +332,7 @@ DROP TABLE products;
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of 2<superscript>32</> (4 billion) <acronym>SQL</acronym> commands
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within a single transaction. In practice this limit is not a
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problem --- note that the limit is on number of
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<acronym>SQL</acronym> commands, not number of tuples processed.
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<acronym>SQL</acronym> commands, not number of rows processed.
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</para>
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</sect1>
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@@ -1047,7 +1047,7 @@ SELECT name, altitude
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</para>
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<para>
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In some cases you may wish to know which table a particular tuple
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In some cases you may wish to know which table a particular row
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originated from. There is a system column called
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<structfield>TABLEOID</structfield> in each table which can tell you the
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originating table:
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