# File lib/arel/select_manager.rb, line 9 def initialize engine, table = nil super(engine) @ast = Nodes::SelectStatement.new @ctx = @ast.cores.last from table end
# File lib/arel/select_manager.rb, line 50 def as other create_table_alias grouping(@ast), Nodes::SqlLiteral.new(other) end
# File lib/arel/select_manager.rb, line 26 def constraints @ctx.wheres end
# File lib/arel/select_manager.rb, line 149 def distinct(value = true) if value @ctx.set_quantifier = Arel::Nodes::Distinct.new else @ctx.set_quantifier = nil end self end
# File lib/arel/select_manager.rb, line 158 def distinct_on(value) if value @ctx.set_quantifier = Arel::Nodes::DistinctOn.new(value) else @ctx.set_quantifier = nil end self end
# File lib/arel/select_manager.rb, line 201 def except other Nodes::Except.new ast, other.ast end
Produces an Arel::Nodes::Exists node
# File lib/arel/select_manager.rb, line 46 def exists Arel::Nodes::Exists.new @ast end
# File lib/arel/select_manager.rb, line 87 def from table table = Nodes::SqlLiteral.new(table) if String === table case table when Nodes::Join @ctx.source.right << table else @ctx.source.left = table end self end
# File lib/arel/select_manager.rb, line 100 def froms @ast.cores.map { |x| x.from }.compact end
# File lib/arel/select_manager.rb, line 76 def group *columns columns.each do |column| # FIXME: backwards compat column = Nodes::SqlLiteral.new(column) if String === column column = Nodes::SqlLiteral.new(column.to_s) if Symbol === column @ctx.groups.push Nodes::Group.new column end self end
# File lib/arel/select_manager.rb, line 121 def having *exprs @ctx.having = Nodes::Having.new(collapse(exprs, @ctx.having)) self end
# File lib/arel/select_manager.rb, line 16 def initialize_copy other super @ctx = @ast.cores.last end
# File lib/arel/select_manager.rb, line 197 def intersect other Nodes::Intersect.new ast, other.ast end
# File lib/arel/select_manager.rb, line 104 def join relation, klass = Nodes::InnerJoin return self unless relation case relation when String, Nodes::SqlLiteral raise if relation.empty? klass = Nodes::StringJoin end @ctx.source.right << create_join(relation, nil, klass) self end
# File lib/arel/select_manager.rb, line 229 def join_sources @ctx.source.right end
# File lib/arel/select_manager.rb, line 21 def limit @ast.limit && @ast.limit.expr end
# File lib/arel/select_manager.rb, line 54 def lock locking = Arel.sql('FOR UPDATE') case locking when true locking = Arel.sql('FOR UPDATE') when Arel::Nodes::SqlLiteral when String locking = Arel.sql locking end @ast.lock = Nodes::Lock.new(locking) self end
# File lib/arel/select_manager.rb, line 67 def locked @ast.lock end
# File lib/arel/select_manager.rb, line 30 def offset @ast.offset && @ast.offset.expr end
# File lib/arel/select_manager.rb, line 71 def on *exprs @ctx.source.right.last.right = Nodes::On.new(collapse(exprs)) self end
# File lib/arel/select_manager.rb, line 167 def order *expr # FIXME: We SHOULD NOT be converting these to SqlLiteral automatically @ast.orders.concat expr.map { |x| STRING_OR_SYMBOL_CLASS.include?(x.class) ? Nodes::SqlLiteral.new(x.to_s) : x } self end
# File lib/arel/select_manager.rb, line 175 def orders @ast.orders end
# File lib/arel/select_manager.rb, line 117 def outer_join relation join(relation, Nodes::OuterJoin) end
# File lib/arel/select_manager.rb, line 132 def project *projections # FIXME: converting these to SQLLiterals is probably not good, but # rails tests require it. @ctx.projections.concat projections.map { |x| STRING_OR_SYMBOL_CLASS.include?(x.class) ? Nodes::SqlLiteral.new(x.to_s) : x } self end
# File lib/arel/select_manager.rb, line 141 def projections @ctx.projections end
# File lib/arel/select_manager.rb, line 145 def projections= projections @ctx.projections = projections end
# File lib/arel/select_manager.rb, line 34 def skip amount if amount @ast.offset = Nodes::Offset.new(amount) else @ast.offset = nil end self end
# File lib/arel/select_manager.rb, line 233 def source @ctx.source end
# File lib/arel/select_manager.rb, line 217 def take limit if limit @ast.limit = Nodes::Limit.new(limit) @ctx.top = Nodes::Top.new(limit) else @ast.limit = nil @ctx.top = nil end self end
# File lib/arel/select_manager.rb, line 186 def union operation, other = nil if other node_class = Nodes.const_get("Union#{operation.to_s.capitalize}") else other = operation node_class = Nodes::Union end node_class.new self.ast, other.ast end
# File lib/arel/select_manager.rb, line 179 def where_sql return if @ctx.wheres.empty? viz = Visitors::WhereSql.new @engine.connection Nodes::SqlLiteral.new viz.accept(@ctx, Collectors::SQLString.new).value end
# File lib/arel/select_manager.rb, line 126 def window name window = Nodes::NamedWindow.new(name) @ctx.windows.push window window end
# File lib/arel/select_manager.rb, line 206 def with *subqueries if subqueries.first.is_a? Symbol node_class = Nodes.const_get("With#{subqueries.shift.to_s.capitalize}") else node_class = Nodes::With end @ast.with = node_class.new(subqueries.flatten) self end
# File lib/arel/select_manager.rb, line 250 def collapse exprs, existing = nil exprs = exprs.unshift(existing.expr) if existing exprs = exprs.compact.map { |expr| if String === expr # FIXME: Don't do this automatically Arel.sql(expr) else expr end } if exprs.length == 1 exprs.first else create_and exprs end end