%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % Defines various relational algebra symbols. % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% \NeedsTeXFormat{LaTeX2e}[2001/06/01] \ProvidesPackage{relalg}[2008/02/28 Relational algebra notation] \RequirePackage{amssymb} \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} %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % semijoin operator \newcommand{\RelSemiJoin}{\ensuremath{\ltimes}} %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % antijoin operator \newcommand{\RelAntiJoin}{\ensuremath{\triangleright}} %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % 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 1.9 2010/12/12 07:27:30 nstanger % - 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. % % 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? % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%