- Normalised the restrict, intersect and join macros. - Refactored aggregate function macros into a single parameterised RelAaggregate macro. - Fixed incorrect macro references in outer join macros.

nigel.stanger / LaTeX

Browse code - Normalised the restrict, intersect and join macros. - Refactored aggregate function macros into a single parameterised RelAaggregate macro. - Fixed incorrect macro references in outer join macros. master
1 parent 692d592 commit 2420dc50af55b9d974219a739a9101c4c2fc8d24 nstanger authored on 12 Dec 2010

Patch

Showing 1 changed file

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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % File: $Id$ % % Defines various relational algebra symbols. % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% \NeedsTeXFormat{LaTeX2e}[2001/06/01] \ProvidesPackage{relalg}[2008/02/28 Relational algebra notation] \RequirePackage{latexsym} \RequirePackage{graphics} % Graphics is needed so that we can scale the size of a couple of operators. %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % BASIC OPERATORS % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % select or restrict operator \newcommand{\RelSelect}{\ensuremath{\sigma}} \newcommand{\RelRestrict}{\RelSelect} %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % project operator \newcommand{\RelProject}{\ensuremath{\pi}} %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % set union operator \newcommand{\RelUnion}{\ensuremath{\cup}} %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % set difference operator \newcommand{\RelDifference}{\ensuremath{-}} %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % cartesian product operator \newcommand{\RelProduct}{\ensuremath{\times}} %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % rename operator \newcommand{\RelRename}{\ensuremath{\rho}} %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % extend operator \newcommand{\RelExtend}{\ensuremath{\epsilon}} %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % ADDITIONAL OPERATORS % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % set intersection operator \newcommand{\RelIntersection}{\ensuremath{\cap}} \newcommand{\RelIntersect}{\RelIntersection} %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % natural join operator \newcommand{\RelNaturalJoin}{\ensuremath{\Join}} \newcommand{\RelNatJoin}{\RelNatJoin} \newcommand{\RelNJoin}{\RelNJoin} %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % division operators \newcommand{\RelDivide}{\ensuremath{/}} \newcommand{\RelAltDivide}{\ensuremath{\div}} %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % assignment operator \newcommand{\RelAssign}{\ensuremath{\leftarrow}} %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % EXTENDED OPERATORS % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % aggregate functions \newcommand{\RelAggregrate}[2]{\ensuremath{\mathcal{G}_{\mathbf{\mathrm{#1}}(#2)}}} \newcommand{\RelSum}[1]{\RelAggregrate{sum}{#1}} \newcommand{\RelAvg}[1]{\RelAggregrate{avg}{#1}} \newcommand{\RelMin}[1]{\RelAggregrate{min}{#1}} \newcommand{\RelMax}[1]{\RelAggregrate{max}{#1}} \newcommand{\RelCount}[1]{\RelAggregrate{count}{#1}} %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % outer join operators % Note: can't use \ensuremath in these because it screws up the spacing. % The $ are OK though because they're used inside hboxes anyway. \newcommand{\RelLeftOuterJoin}{\scalebox{0.5}[1]{$\sqsupset$}\mkern-2.5mu\lower0.1em\hbox{$\Join$}} \newcommand{\RelleftOuterJoin}{\RelLeftOuterJoin} \newcommand{\RelLOuterJoin}{\RelLeftOuterJoin} \newcommand{\RelLeftOuter}{\RelLeftOuterJoin} \newcommand{\RelLOJ}{\RelLeftOuterJoin} \newcommand{\RelRightOuterJoin}{\lower0.1em\hbox{$\Join$}\mkern-2.5mu\scalebox{0.5}[1]{$\sqsubset$}} \newcommand{\RelrightOuterJoin}{\RelRightOuterJoin} \newcommand{\RelROuterJoin}{\RelRightOuterJoin} \newcommand{\RelRightOuter}{\RelRightOuterJoin} \newcommand{\RelROJ}{\RelRightOuterJoin} \newcommand{\RelFullOuterJoin}{\scalebox{0.5}[1]{$\sqsupset$}\mkern-2.5mu\lower0.1em\hbox{$\Join$}\mkern-2.5mu\scalebox{0.5}[1]{$\sqsubset$}} \newcommand{\RelfullOuterJoin}{\RelFullOuterJoin} \newcommand{\RelFOuterJoin}{\RelFullOuterJoin} \newcommand{\RelFullOuter}{\RelFullOuterJoin} \newcommand{\RelFOJ}{\RelFullOuterJoin} %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % MISCELLANEOUS % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % logical operators % \And appears to conflict with beamer? (unconfirmed) \newcommand{\RelLogicalAnd}{\ensuremath{\wedge}} \newcommand{\RelLogAnd}{\RelLogicalAnd} \newcommand{\RelLogicalOr}{\ensuremath{\vee}} \newcommand{\RelLogOr}{\RelLogicalOr} \newcommand{\RelLogicalNot}{\ensuremath{\neg}} \newcommand{\RelLogNot}{\RelLogicalNot} \endinput %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % $Log$ % Revision 1.8 2010/12/12 04:40:39 nstanger % - Added extend operator. % % Revision 1.7 2010/12/12 01:25:19 nstanger % - Normalised the logical AND/OR macros. % % Revision 1.6 2008/02/27 22:08:36 nstanger % - Updated package release date. % % Revision 1.5 2008/02/27 22:07:34 nstanger % - Prefixed all macro names with "Rel" to avoid namespace clashes. % % Revision 1.4 2005/03/08 01:25:23 nstanger % - Updated package date. % % Revision 1.3 2005/03/08 01:24:51 nstanger % - Added \leftOuterJoin, \rightOuterJoin and \fullOuterJoin to make generating % them from XML easier. % % Revision 1.2 2004/07/19 00:26:19 nstanger % - Renamed logical operators to \LogicalXXX because of conflict with \And, possibly defined in beamer? % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % File: $Id$ % % Defines various relational algebra symbols. % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% \NeedsTeXFormat{LaTeX2e}[2001/06/01] \ProvidesPackage{relalg}[2008/02/28 Relational algebra notation] \RequirePackage{latexsym} \RequirePackage{graphics} % Graphics is needed so that we can scale the size of a couple of operators. %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % BASIC OPERATORS % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % select or restrict operator \newcommand{\RelSelect}{\ensuremath{\sigma}} \newcommand{\RelRestrict}{\ensuremath{\sigma}} %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % project operator \newcommand{\RelProject}{\ensuremath{\pi}} %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % set union operator \newcommand{\RelUnion}{\ensuremath{\cup}} %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % set difference operator \newcommand{\RelDifference}{\ensuremath{-}} %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % cartesian product operator \newcommand{\RelProduct}{\ensuremath{\times}} %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % rename operator \newcommand{\RelRename}{\ensuremath{\rho}} %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % extend operator \newcommand{\RelExtend}{\ensuremath{\epsilon}} %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % ADDITIONAL OPERATORS % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % set intersection operator \newcommand{\RelIntersection}{\ensuremath{\cap}} \newcommand{\RelIntersect}{\ensuremath{\cap}} %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % natural join operator \newcommand{\RelNaturalJoin}{\ensuremath{\Join}} \newcommand{\RelNatJoin}{\ensuremath{\Join}} \newcommand{\RelNJoin}{\ensuremath{\Join}} %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % division operators \newcommand{\RelDivide}{\ensuremath{/}} \newcommand{\RelAltDivide}{\ensuremath{\div}} %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % assignment operator \newcommand{\RelAssign}{\ensuremath{\leftarrow}} %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % EXTENDED OPERATORS % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % aggregate functions \newcommand{\RelSum}[1]{\ensuremath{\mathcal{G}_{\mathbf{\mathrm{sum}}(#1)}}} \newcommand{\RelAvg}[1]{\ensuremath{\mathcal{G}_{\mathbf{\mathrm{avg}}(#1)}}} \newcommand{\RelMin}[1]{\ensuremath{\mathcal{G}_{\mathbf{\mathrm{min}}(#1)}}} \newcommand{\RelMax}[1]{\ensuremath{\mathcal{G}_{\mathbf{\mathrm{max}}(#1)}}} \newcommand{\RelCount}[1]{\ensuremath{\mathcal{G}_{\mathbf{\mathrm{count}}(#1)}}} %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % outer join operators % Note: can't use \ensuremath in these because it screws up the spacing. % The $ are OK though because they're used inside hboxes anyway. \newcommand{\RelLeftOuterJoin}{\scalebox{0.5}[1]{$\sqsupset$}\mkern-2.5mu\lower0.1em\hbox{$\Join$}} \newcommand{\RelleftOuterJoin}{\LeftOuterJoin} \newcommand{\RelLOuterJoin}{\LeftOuterJoin} \newcommand{\RelLeftOuter}{\LeftOuterJoin} \newcommand{\RelLOJ}{\LeftOuterJoin} \newcommand{\RelRightOuterJoin}{\lower0.1em\hbox{$\Join$}\mkern-2.5mu\scalebox{0.5}[1]{$\sqsubset$}} \newcommand{\RelrightOuterJoin}{\RightOuterJoin} \newcommand{\RelROuterJoin}{\RightOuterJoin} \newcommand{\RelRightOuter}{\RightOuterJoin} \newcommand{\RelROJ}{\RightOuterJoin} \newcommand{\RelFullOuterJoin}{\scalebox{0.5}[1]{$\sqsupset$}\mkern-2.5mu\lower0.1em\hbox{$\Join$}\mkern-2.5mu\scalebox{0.5}[1]{$\sqsubset$}} \newcommand{\RelfullOuterJoin}{\FullOuterJoin} \newcommand{\RelFOuterJoin}{\FullOuterJoin} \newcommand{\RelFullOuter}{\FullOuterJoin} \newcommand{\RelFOJ}{\FullOuterJoin} %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % MISCELLANEOUS % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % logical operators % \And appears to conflict with beamer? (unconfirmed) \newcommand{\RelLogicalAnd}{\ensuremath{\wedge}} \newcommand{\RelLogAnd}{\RelLogicalAnd} \newcommand{\RelLogicalOr}{\ensuremath{\vee}} \newcommand{\RelLogOr}{\RelLogicalOr} \newcommand{\RelLogicalNot}{\ensuremath{\neg}} \newcommand{\RelLogNot}{\RelLogicalNot} \endinput %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % $Log$ % Revision 1.7 2010/12/12 01:25:19 nstanger % - Normalised the logical AND/OR macros. % % Revision 1.6 2008/02/27 22:08:36 nstanger % - Updated package release date. % % Revision 1.5 2008/02/27 22:07:34 nstanger % - Prefixed all macro names with "Rel" to avoid namespace clashes. % % Revision 1.4 2005/03/08 01:25:23 nstanger % - Updated package date. % % Revision 1.3 2005/03/08 01:24:51 nstanger % - Added \leftOuterJoin, \rightOuterJoin and \fullOuterJoin to make generating % them from XML easier. % % Revision 1.2 2004/07/19 00:26:19 nstanger % - Renamed logical operators to \LogicalXXX because of conflict with \And, possibly defined in beamer? % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

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relalg.sty

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% File: $Id$
%
% Defines various relational algebra symbols.
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\NeedsTeXFormat{LaTeX2e}[2001/06/01]
\ProvidesPackage{relalg}[2008/02/28 Relational algebra notation]

\RequirePackage{latexsym}
\RequirePackage{graphics}
% Graphics is needed so that we can scale the size of a couple of operators.

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% BASIC OPERATORS
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% select or restrict operator
\newcommand{\RelSelect}{\ensuremath{\sigma}}
\newcommand{\RelRestrict}{\RelSelect}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% project operator
\newcommand{\RelProject}{\ensuremath{\pi}}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% set union operator
\newcommand{\RelUnion}{\ensuremath{\cup}}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% set difference operator
\newcommand{\RelDifference}{\ensuremath{-}}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% cartesian product operator
\newcommand{\RelProduct}{\ensuremath{\times}}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% rename operator
\newcommand{\RelRename}{\ensuremath{\rho}}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% extend operator
\newcommand{\RelExtend}{\ensuremath{\epsilon}}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% ADDITIONAL OPERATORS
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% set intersection operator
\newcommand{\RelIntersection}{\ensuremath{\cap}}
\newcommand{\RelIntersect}{\RelIntersection}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% natural join operator
\newcommand{\RelNaturalJoin}{\ensuremath{\Join}}
\newcommand{\RelNatJoin}{\RelNatJoin}
\newcommand{\RelNJoin}{\RelNJoin}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% division operators
\newcommand{\RelDivide}{\ensuremath{/}}
\newcommand{\RelAltDivide}{\ensuremath{\div}}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% assignment operator
\newcommand{\RelAssign}{\ensuremath{\leftarrow}}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% EXTENDED OPERATORS
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% aggregate functions
\newcommand{\RelAggregrate}[2]{\ensuremath{\mathcal{G}_{\mathbf{\mathrm{#1}}(#2)}}}
\newcommand{\RelSum}[1]{\RelAggregrate{sum}{#1}}
\newcommand{\RelAvg}[1]{\RelAggregrate{avg}{#1}}
\newcommand{\RelMin}[1]{\RelAggregrate{min}{#1}}
\newcommand{\RelMax}[1]{\RelAggregrate{max}{#1}}
\newcommand{\RelCount}[1]{\RelAggregrate{count}{#1}}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% outer join operators
% Note: can't use \ensuremath in these because it screws up the spacing.
% The $ are OK though because they're used inside hboxes anyway.
\newcommand{\RelLeftOuterJoin}{\scalebox{0.5}[1]{$\sqsupset$}\mkern-2.5mu\lower0.1em\hbox{$\Join$}}
\newcommand{\RelleftOuterJoin}{\RelLeftOuterJoin}
\newcommand{\RelLOuterJoin}{\RelLeftOuterJoin}
\newcommand{\RelLeftOuter}{\RelLeftOuterJoin}
\newcommand{\RelLOJ}{\RelLeftOuterJoin}

\newcommand{\RelRightOuterJoin}{\lower0.1em\hbox{$\Join$}\mkern-2.5mu\scalebox{0.5}[1]{$\sqsubset$}}
\newcommand{\RelrightOuterJoin}{\RelRightOuterJoin}
\newcommand{\RelROuterJoin}{\RelRightOuterJoin}
\newcommand{\RelRightOuter}{\RelRightOuterJoin}
\newcommand{\RelROJ}{\RelRightOuterJoin}

\newcommand{\RelFullOuterJoin}{\scalebox{0.5}[1]{$\sqsupset$}\mkern-2.5mu\lower0.1em\hbox{$\Join$}\mkern-2.5mu\scalebox{0.5}[1]{$\sqsubset$}}
\newcommand{\RelfullOuterJoin}{\RelFullOuterJoin}
\newcommand{\RelFOuterJoin}{\RelFullOuterJoin}
\newcommand{\RelFullOuter}{\RelFullOuterJoin}
\newcommand{\RelFOJ}{\RelFullOuterJoin}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% MISCELLANEOUS
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% logical operators
% \And appears to conflict with beamer? (unconfirmed)
\newcommand{\RelLogicalAnd}{\ensuremath{\wedge}}
\newcommand{\RelLogAnd}{\RelLogicalAnd}

\newcommand{\RelLogicalOr}{\ensuremath{\vee}}
\newcommand{\RelLogOr}{\RelLogicalOr}

\newcommand{\RelLogicalNot}{\ensuremath{\neg}}
\newcommand{\RelLogNot}{\RelLogicalNot}

\endinput

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% $Log$
% Revision 1.8  2010/12/12 04:40:39  nstanger
% - Added extend operator.
%
% Revision 1.7  2010/12/12 01:25:19  nstanger
% - Normalised the logical AND/OR macros.
%
% Revision 1.6  2008/02/27 22:08:36  nstanger
% - Updated package release date.
%
% Revision 1.5  2008/02/27 22:07:34  nstanger
% - Prefixed all macro names with "Rel" to avoid namespace clashes.
%
% Revision 1.4  2005/03/08 01:25:23  nstanger
% - Updated package date.
%
% Revision 1.3  2005/03/08 01:24:51  nstanger
% - Added \leftOuterJoin, \rightOuterJoin and \fullOuterJoin to make generating
%   them from XML easier.
%
% Revision 1.2  2004/07/19 00:26:19  nstanger
% - Renamed logical operators to \LogicalXXX because of conflict with \And, possibly defined in beamer?
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\NeedsTeXFormat{LaTeX2e}[2001/06/01]
\ProvidesPackage{relalg}[2008/02/28 Relational algebra notation]

\RequirePackage{latexsym}
\RequirePackage{graphics}
% Graphics is needed so that we can scale the size of a couple of operators.

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% BASIC OPERATORS
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% select or restrict operator
\newcommand{\RelSelect}{\ensuremath{\sigma}}
\newcommand{\RelRestrict}{\ensuremath{\sigma}}