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Shell Programming and Scripting
AIX's "bc" Command: Doing a Conditional Expression?
Post 302743367 by mrm5102 on Wednesday 12th of December 2012 04:19:45 PM
12-12-2012
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sql::statement::operation
SQL::Statement::Operation(3) User Contributed Perl Documentation SQL::Statement::Operation(3) NAME
SQL::Statement::Operation - base class for all operation terms SYNOPSIS
# create an operation with an SQL::Statement object as owner, specifying # the operation name (for error purposes), the left and the right # operand my $term = SQL::Statement::Operation->new( $owner, $op, $left, $right ); # access the result of that operation $term->value( $eval ); DESCRIPTION
SQL::Statement::Operation is an abstract base class providing the interface for all operation terms. INHERITANCE
SQL::Statement::Operation ISA SQL::Statement::Term METHODS
new Instantiates new operation term. value Return the result of the operation of the term by calling operate operate Abstract method which will do the operation of the term. Must be overridden by derived classes. DESTROY Destroys the term and undefines the weak reference to the owner as well as the stored operation, the left and the right operand. NAME
SQL::Statement::Operation::Neg - negate operation SYNOPSIS
# create an <not> operation with an SQL::Statement object as owner, # specifying the operation name, the left and B<no> right operand my $term = SQL::Statement::Neg->new( $owner, $op, $left, undef ); # access the result of that operation $term->value( $eval ); DESCRIPTION
SQL::Statement::Operation::Neg INHERITANCE
SQL::Statement::Operation::Neg ISA SQL::Statement::Operation ISA SQL::Statement::Term METHODS
operate Return the logical negated value of the left operand. NAME
SQL::Statement::Operation::And - and operation SYNOPSIS
# create an C<and> operation with an SQL::Statement object as owner, # specifying the operation name, the left and the right operand my $term = SQL::Statement::And->new( $owner, $op, $left, $right ); # access the result of that operation $term->value( $eval ); DESCRIPTION
SQL::Statement::Operation::And implements the logical "and" operation between two terms. INHERITANCE
SQL::Statement::Operation::And ISA SQL::Statement::Operation ISA SQL::Statement::Term METHODS
operate Return the result of the logical "and" operation for the values of the left and right operand. NAME
SQL::Statement::Operation::Or - or operation SYNOPSIS
# create an C<or> operation with an SQL::Statement object as owner, # specifying the operation name, the left and the right operand my $term = SQL::Statement::Or->new( $owner, $op, $left, $right ); # access the result of that operation $term->value( $eval ); DESCRIPTION
SQL::Statement::Operation::Or implements the logical "or" operation between two terms. INHERITANCE
SQL::Statement::Operation::Or ISA SQL::Statement::Operation ISA SQL::Statement::Term METHODS
operate Return the result of the logical "or" operation for the values of the left and right operand. NAME
SQL::Statement::Operation::Is - is operation SYNOPSIS
# create an C<is> operation with an SQL::Statement object as owner, # specifying the operation name, the left and the right operand my $term = SQL::Statement::Is->new( $owner, $op, $left, $right ); # access the result of that operation $term->value( $eval ); DESCRIPTION
SQL::Statement::Operation::Is supports: "IS NULL", "IS TRUE" and "IS FALSE". The right operand is always evaluated in boolean contect in case of "IS TRUE" and "IS FALSE". "IS NULL" returns true even if the left term is an empty string (''). INHERITANCE
SQL::Statement::Operation::Is ISA SQL::Statement::Operation ISA SQL::Statement::Term METHODS
operate Returns true when the left term is null, true or false - based on the requested right value. NAME
SQL::Statement::Operation::ANSI::Is - is operation SYNOPSIS
# create an C<is> operation with an SQL::Statement object as owner, # specifying the operation name, the left and the right operand my $term = SQL::Statement::Is->new( $owner, $op, $left, $right ); # access the result of that operation $term->value( $eval ); DESCRIPTION
SQL::Statement::Operation::ANSI::Is supports: "IS NULL", "IS TRUE" and "IS FALSE". The right operand is always evaluated in boolean contect in case of "IS TRUE" and "IS FALSE". "IS NULL" returns true if the right term is not defined, false otherwise. INHERITANCE
SQL::Statement::Operation::Is ISA SQL::Statement::Operation ISA SQL::Statement::Term METHODS
operate Returns true when the left term is null, true or false - based on the requested right value. NAME
SQL::Statement::Operation::Contains - in operation SYNOPSIS
# create an C<in> operation with an SQL::Statement object as owner, # specifying the operation name, the left and the right operand my $term = SQL::Statement::Contains->new( $owner, $op, $left, $right ); # access the result of that operation $term->value( $eval ); DESCRIPTION
SQL::Statement::Operation::Contains expects the right operand is an array of SQL::Statement::Term instances. It checks whether the left operand is in the list of the right operands or not like: $left->value($eval) ~~ map { $_->value($eval) } @{$right} INHERITANCE
SQL::Statement::Operation::Contains ISA SQL::Statement::Operation ISA SQL::Statement::Term METHODS
operate Returns true when the left term is equal to any of the right terms NAME
SQL::Statement::Operation::Between - between operation SYNOPSIS
# create an C<between> operation with an SQL::Statement object as owner, # specifying the operation name, the left and the right operand my $term = SQL::Statement::Between->new( $owner, $op, $left, $right ); # access the result of that operation $term->value( $eval ); DESCRIPTION
SQL::Statement::Operation::Between expects the right operand is an array of 2 SQL::Statement::Term instances. It checks whether the left operand is between the right operands like: ( $left->value($eval) >= $right[0]->value($eval) ) && ( $left->value($eval) <= $right[1]->value($eval) ) INHERITANCE
SQL::Statement::Operation::Between ISA SQL::Statement::Operation ISA SQL::Statement::Term METHODS
operate Returns true when the left term is between both right terms NAME
SQL::Statement::Operation::Equality - abstract base class for comparisons SYNOPSIS
# create an C<equality> operation with an SQL::Statement object as owner, # specifying the operation name, the left and the right operand my $term = SQL::Statement::Equality->new( $owner, $op, $left, $right ); # access the result of that operation $term->value( $eval ); DESCRIPTION
SQL::Statement::Operation::Equality implements compare operations between two terms - choosing either numerical comparison or string comparison, depending wherther both operands are a numeric or not. INHERITANCE
SQL::Statement::Operation::Equality ISA SQL::Statement::Operation ISA SQL::Statement::Term METHODS
operate Return the result of the comparison. numcmp Abstract method which will do the numeric comparison of both terms. Must be overridden by derived classes. strcmp Abstract method which will do the string comparison of both terms. Must be overridden by derived classes. NAME
SQL::Statement::Operation::Equal - implements equal operation SYNOPSIS
# create an C<equal> operation with an SQL::Statement object as owner, # specifying the operation name, the left and the right operand my $term = SQL::Statement::Equal->new( $owner, $op, $left, $right ); # access the result of that operation $term->value( $eval ); DESCRIPTION
SQL::Statement::Operation::Equal implements compare operations between two numbers and two strings. INHERITANCE
SQL::Statement::Operation::Equal ISA SQL::Statement::Operation::Equality ISA SQL::Statement::Operation ISA SQL::Statement::Term METHODS
numcmp Return true when "$left == $right" strcmp Return true when "$left eq $right" NAME
SQL::Statement::Operation::NotEqual - implements not equal operation SYNOPSIS
# create an C<not equal> operation with an SQL::Statement object as owner, # specifying the operation name, the left and the right operand my $term = SQL::Statement::NotEqual->new( $owner, $op, $left, $right ); # access the result of that operation $term->value( $eval ); DESCRIPTION
SQL::Statement::Operation::NotEqual implements negated compare operations between two numbers and two strings. INHERITANCE
SQL::Statement::Operation::NotEqual ISA SQL::Statement::Operation::Equality ISA SQL::Statement::Operation ISA SQL::Statement::Term METHODS
numcmp Return true when "$left != $right" strcmp Return true when "$left ne $right" NAME
SQL::Statement::Operation::Lower - implements lower than operation SYNOPSIS
# create an C<lower than> operation with an SQL::Statement object as owner, # specifying the operation name, the left and the right operand my $term = SQL::Statement::Lower->new( $owner, $op, $left, $right ); # access the result of that operation $term->value( $eval ); DESCRIPTION
SQL::Statement::Operation::Lower implements lower than compare operations between two numbers and two strings. INHERITANCE
SQL::Statement::Operation::Lower ISA SQL::Statement::Operation::Equality ISA SQL::Statement::Operation ISA SQL::Statement::Term METHODS
numcmp Return true when "$left < $right" strcmp Return true when "$left lt $right" NAME
SQL::Statement::Operation::Greater - implements greater than operation SYNOPSIS
# create an C<greater than> operation with an SQL::Statement object as owner, # specifying the operation name, the left and the right operand my $term = SQL::Statement::Greater->new( $owner, $op, $left, $right ); # access the result of that operation $term->value( $eval ); DESCRIPTION
SQL::Statement::Operation::Greater implements greater than compare operations between two numbers and two strings. INHERITANCE
SQL::Statement::Operation::Greater ISA SQL::Statement::Operation::Equality ISA SQL::Statement::Operation ISA SQL::Statement::Term METHODS
numcmp Return true when $left $right> strcmp Return true when "$left gt $right" NAME
SQL::Statement::Operation::LowerEqual - implements lower equal operation SYNOPSIS
# create an C<lower equal> operation with an SQL::Statement object as owner, # specifying the operation name, the left and the right operand my $term = SQL::Statement::LowerEqual->new( $owner, $op, $left, $right ); # access the result of that operation $term->value( $eval ); DESCRIPTION
SQL::Statement::Operation::LowerEqual implements lower equal compare operations between two numbers and two strings. INHERITANCE
SQL::Statement::Operation::LowerEqual ISA SQL::Statement::Operation::Equality ISA SQL::Statement::Operation ISA SQL::Statement::Term METHODS
numcmp Return true when "$left <= $right" strcmp Return true when "$left le $right" NAME
SQL::Statement::Operation::GreaterEqual - implements greater equal operation SYNOPSIS
# create an C<greater equal> operation with an SQL::Statement object as owner, # specifying the operation name, the left and the right operand my $term = SQL::Statement::GreaterEqual->new( $owner, $op, $left, $right ); # access the result of that operation $term->value( $eval ); DESCRIPTION
SQL::Statement::Operation::GreaterEqual implements greater equal compare operations between two numbers and two strings. INHERITANCE
SQL::Statement::Operation::GreaterEqual ISA SQL::Statement::Operation::Equality ISA SQL::Statement::Operation ISA SQL::Statement::Term METHODS
numcmp Return true when $left = $right> strcmp Return true when "$left ge $right" NAME
SQL::Statement::Operation::Regexp - abstract base class for comparisons based on regular expressions SYNOPSIS
# create an C<regexp> operation with an SQL::Statement object as owner, # specifying the operation name, the left and the right operand my $term = SQL::Statement::Regexp->new( $owner, $op, $left, $right ); # access the result of that operation $term->value( $eval ); DESCRIPTION
SQL::Statement::Operation::Regexp implements the comparisons for the "LIKE" operation family. INHERITANCE
SQL::Statement::Operation::Regexp ISA SQL::Statement::Operation ISA SQL::Statement::Term METHODS
operate Return the result of the comparison. right Returns the regular expression based on the right term. The right term is expected to be constant - so "a LIKE b" in not supported. regexp Abstract method which must return a regular expression ("qr//") from the given string. Must be overridden by derived classes. NAME
SQL::Statement::Operation::Like - implements the like operation SYNOPSIS
# create an C<like> operation with an SQL::Statement object as owner, # specifying the operation name, the left and the right operand my $term = SQL::Statement::Like->new( $owner, $op, $left, $right ); # access the result of that operation $term->value( $eval ); DESCRIPTION
SQL::Statement::Operation::Like is used to to the comparisons for the "LIKE" operation. INHERITANCE
SQL::Statement::Operation::Like ISA SQL::Statement::Operation::Regexp ISA SQL::Statement::Operation ISA SQL::Statement::Term METHODS
regexp Returns "qr/^$right$/s" NAME
SQL::Statement::Operation::Clike - implements the clike operation SYNOPSIS
# create an C<clike> operation with an SQL::Statement object as owner, # specifying the operation name, the left and the right operand my $term = SQL::Statement::Clike->new( $owner, $op, $left, $right ); # access the result of that operation $term->value( $eval ); DESCRIPTION
SQL::Statement::Operation::Clike is used to to the comparisons for the "CLIKE" operation. INHERITANCE
SQL::Statement::Operation::Clike ISA SQL::Statement::Operation::Regexp ISA SQL::Statement::Operation ISA SQL::Statement::Term METHODS
regexp Returns "qr/^$right$/si" NAME
SQL::Statement::Operation::RLike - implements the rlike operation SYNOPSIS
# create an C<rlike> operation with an SQL::Statement object as owner, # specifying the operation name, the left and the right operand my $term = SQL::Statement::RLike->new( $owner, $op, $left, $right ); # access the result of that operation $term->value( $eval ); DESCRIPTION
SQL::Statement::Operation::RLike is used to to the comparisons for the "RLIKE" operation. INHERITANCE
SQL::Statement::Operation::RLike ISA SQL::Statement::Operation::Regexp ISA SQL::Statement::Operation ISA SQL::Statement::Term METHODS
regexp Returns "qr/$right$/s" AUTHOR AND COPYRIGHT
Copyright (c) 2009,2010 by Jens Rehsack: rehsackATcpan.org All rights reserved. You may distribute this module under the terms of either the GNU General Public License or the Artistic License, as specified in the Perl README file. perl v5.12.1 2010-05-06 SQL::Statement::Operation(3)