Return a Sequel::SQL::BooleanExpression created from this hash, matching all of the conditions in this hash and the condition specified by the given argument.
{:a=>1} & :b # SQL: a = 1 AND b {:a=>true} & ~:b # SQL: a IS TRUE AND NOT b
# File lib/sequel/extensions/core_refinements.rb, line 100 100: def &(ce) 101: ::Sequel::SQL::BooleanExpression.new(:AND, self, ce) 102: end
Return a Sequel::SQL::CaseExpression with this hash as the conditions and the given default value. Note that the order of the conditions will be arbitrary on ruby 1.8, so all conditions should be orthogonal.
{{:a=>[2,3]}=>1}.case(0) # SQL: CASE WHEN a IN (2, 3) THEN 1 ELSE 0 END {:a=>1, :b=>2}.case(:d, :c) # SQL: CASE c WHEN a THEN 1 WHEN b THEN 2 ELSE d END # or: CASE c WHEN b THEN 2 WHEN a THEN 1 ELSE d END
# File lib/sequel/extensions/core_refinements.rb, line 130 130: def case(*args) 131: ::Sequel::SQL::CaseExpression.new(to_a, *args) 132: end
Return a Sequel::SQL::CaseExpression with this array as the conditions and the given default value and expression.
[[{:a=>[2,3]}, 1]].case(0) # SQL: CASE WHEN a IN (2, 3) THEN 1 ELSE 0 END [[:a, 1], [:b, 2]].case(:d, :c) # SQL: CASE c WHEN a THEN 1 WHEN b THEN 2 ELSE d END
# File lib/sequel/extensions/core_refinements.rb, line 31 31: def case(*args) 32: ::Sequel::SQL::CaseExpression.new(self, *args) 33: end
# File lib/sequel/extensions/pg_hstore.rb, line 351 351: def hstore 352: Sequel::Postgres::HStore.new(self) 353: end
Returns receiver wrapped in an Sequel::SQL::Identifier. Usually used to prevent splitting the symbol.
:a__b # SQL: "a"."b" :a__b.identifier # SQL: "a__b"
# File lib/sequel/extensions/core_refinements.rb, line 207 207: def identifier 208: Sequel::SQL::Identifier.new(self) 209: end
Converts a string into a Sequel::LiteralString, in order to override string literalization, e.g.:
DB[:items].filter(:abc => 'def').sql #=> "SELECT * FROM items WHERE (abc = 'def')" DB[:items].filter(:abc => 'def'.lit).sql #=> "SELECT * FROM items WHERE (abc = def)"
You can also provide arguments, to create a Sequel::SQL::PlaceholderLiteralString:
DB[:items].select{|o| o.count('DISTINCT ?'.lit(:a))}.sql #=> "SELECT count(DISTINCT a) FROM items"
# File lib/sequel/extensions/core_refinements.rb, line 180 180: def lit(*args) 181: args.empty? ? Sequel::LiteralString.new(self) : Sequel::SQL::PlaceholderLiteralString.new(self, args) 182: end
# File lib/sequel/extensions/pg_array.rb, line 587 587: def pg_array(type=nil) 588: Sequel::Postgres::PGArray.new(self, type) 589: end
# File lib/sequel/extensions/pg_json.rb, line 347 347: def pg_json 348: Sequel::Postgres::JSONArray.new(self) 349: end
# File lib/sequel/extensions/pg_json.rb, line 357 357: def pg_json 358: Sequel::Postgres::JSONHash.new(self) 359: end
# File lib/sequel/extensions/pg_json.rb, line 351 351: def pg_jsonb 352: Sequel::Postgres::JSONBArray.new(self) 353: end
# File lib/sequel/extensions/pg_json.rb, line 361 361: def pg_jsonb 362: Sequel::Postgres::JSONBHash.new(self) 363: end
# File lib/sequel/extensions/pg_range.rb, line 619 619: def pg_range(db_type=nil) 620: Sequel::Postgres::PGRange.from_range(self, db_type) 621: end
# File lib/sequel/extensions/pg_row.rb, line 609 609: def pg_row 610: Sequel::Postgres::PGRow::ArrayRow.new(self) 611: end
Return a Sequel::SQL::BooleanExpression created from this hash, matching all of the conditions. Rarely do you need to call this explicitly, as Sequel generally assumes that hashes specify this type of condition.
{:a=>true}.sql_expr # SQL: a IS TRUE {:a=>1, :b=>[2, 3]}.sql_expr # SQL: a = 1 AND b IN (2, 3)
# File lib/sequel/extensions/core_refinements.rb, line 140 140: def sql_expr 141: ::Sequel::SQL::BooleanExpression.from_value_pairs(self) 142: end
Return a Sequel::SQL::BooleanExpression created from this array, matching all of the conditions. Rarely do you need to call this explicitly, as Sequel generally assumes that arrays of two element arrays specify this type of condition. One case where it can be necessary to use this is if you are using the object as a value in a filter hash and want to use the = operator instead of the IN operator (which is used by default for arrays of two element arrays).
[[:a, true]].sql_expr # SQL: a IS TRUE [[:a, 1], [:b, [2, 3]]].sql_expr # SQL: a = 1 AND b IN (2, 3)
# File lib/sequel/extensions/core_refinements.rb, line 57 57: def sql_expr 58: Sequel[self] 59: end
Returns a Sequel::SQL::Function with this as the function name, and the given arguments. This is aliased as Symbol#[] if the RUBY_VERSION is less than 1.9.0. Ruby 1.9 defines Symbol#[], and Sequel doesn‘t override methods defined by ruby itself.
:now.sql_function # SQL: now() :sum.sql_function(:a) # SQL: sum(a) :concat.sql_function(:a, :b) # SQL: concat(a, b)
# File lib/sequel/extensions/core_refinements.rb, line 219 219: def sql_function(*args) 220: Sequel::SQL::Function.new(self, *args) 221: end
Return a Sequel::SQL::BooleanExpression created from this array, matching none of the conditions.
[[:a, true]].sql_negate # SQL: a IS NOT TRUE [[:a, 1], [:b, [2, 3]]].sql_negate # SQL: a != 1 AND b NOT IN (2, 3)
# File lib/sequel/extensions/core_refinements.rb, line 66 66: def sql_negate 67: Sequel.negate(self) 68: end
Return a Sequel::SQL::BooleanExpression created from this hash, matching none of the conditions.
{:a=>true}.sql_negate # SQL: a IS NOT TRUE {:a=>1, :b=>[2, 3]}.sql_negate # SQL: a != 1 AND b NOT IN (2, 3)
# File lib/sequel/extensions/core_refinements.rb, line 149 149: def sql_negate 150: ::Sequel::SQL::BooleanExpression.from_value_pairs(self, :AND, true) 151: end
Return a Sequel::SQL::BooleanExpression created from this hash, matching any of the conditions.
{:a=>true}.sql_or # SQL: a IS TRUE {:a=>1, :b=>[2, 3]}.sql_or # SQL: a = 1 OR b IN (2, 3)
# File lib/sequel/extensions/core_refinements.rb, line 158 158: def sql_or 159: ::Sequel::SQL::BooleanExpression.from_value_pairs(self, :OR) 160: end
Return a Sequel::SQL::BooleanExpression created from this array, matching any of the conditions.
[[:a, true]].sql_or # SQL: a IS TRUE [[:a, 1], [:b, [2, 3]]].sql_or # SQL: a = 1 OR b IN (2, 3)
# File lib/sequel/extensions/core_refinements.rb, line 75 75: def sql_or 76: Sequel.or(self) 77: end
Return a Sequel::SQL::StringExpression representing an SQL string made up of the concatenation of this array‘s elements. If an argument is passed it is used in between each element of the array in the SQL concatenation.
[:a].sql_string_join # SQL: a [:a, :b].sql_string_join # SQL: a || b [:a, 'b'].sql_string_join # SQL: a || 'b' ['a', :b].sql_string_join(' ') # SQL: 'a' || ' ' || b
# File lib/sequel/extensions/core_refinements.rb, line 88 88: def sql_string_join(joiner=nil) 89: Sequel.join(self, joiner) 90: end
Return a Sequel::SQL::ValueList created from this array. Used if this array contains all two element arrays and you want it treated as an SQL value list (IN predicate) instead of as a conditions specifier (similar to a hash). This is not necessary if you are using this array as a value in a filter, but may be necessary if you are using it as a value with placeholder SQL:
DB[:a].filter([:a, :b]=>[[1, 2], [3, 4]]) # SQL: (a, b) IN ((1, 2), (3, 4)) DB[:a].filter('(a, b) IN ?', [[1, 2], [3, 4]]) # SQL: (a, b) IN ((1 = 2) AND (3 = 4)) DB[:a].filter('(a, b) IN ?', [[1, 2], [3, 4]].sql_value_list) # SQL: (a, b) IN ((1, 2), (3, 4))
# File lib/sequel/extensions/core_refinements.rb, line 44 44: def sql_value_list 45: ::Sequel::SQL::ValueList.new(self) 46: end
Returns a Sequel::SQL::Blob that holds the same data as this string. Blobs provide proper escaping of binary data.
# File lib/sequel/extensions/core_refinements.rb, line 186 186: def to_sequel_blob 187: ::Sequel::SQL::Blob.new(self) 188: end
Return a Sequel::SQL::BooleanExpression created from this hash, matching all of the conditions in this hash or the condition specified by the given argument.
{:a=>1} | :b # SQL: a = 1 OR b {:a=>true} | ~:b # SQL: a IS TRUE OR NOT b
# File lib/sequel/extensions/core_refinements.rb, line 110 110: def |(ce) 111: ::Sequel::SQL::BooleanExpression.new(:OR, self, ce) 112: end
Return a Sequel::SQL::BooleanExpression created from this array, not matching all of the conditions.
~[[:a, true]] # SQL: a IS NOT TRUE ~[[:a, 1], [:b, [2, 3]]] # SQL: a != 1 OR b NOT IN (2, 3)
# File lib/sequel/extensions/core_refinements.rb, line 22 22: def ~ 23: Sequel.~(self) 24: end
Return a Sequel::SQL::BooleanExpression created from this hash, not matching all of the conditions.
~{:a=>true} # SQL: a IS NOT TRUE ~{:a=>1, :b=>[2, 3]} # SQL: a != 1 OR b NOT IN (2, 3)
# File lib/sequel/extensions/core_refinements.rb, line 119 119: def ~ 120: ::Sequel::SQL::BooleanExpression.from_value_pairs(self, :OR, true) 121: end