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# frozen_string_literal: true
module Arel
module Visitors
class PostgreSQL < Arel::Visitors::ToSql
CUBE = 'CUBE'
ROLLUP = 'ROLLUP'
GROUPING_SET = 'GROUPING SET'
private
def visit_Arel_Nodes_Matches o, collector
op = o.case_sensitive ? ' LIKE ' : ' ILIKE '
collector = infix_value o, collector, op
if o.escape
collector << ' ESCAPE '
visit o.escape, collector
else
collector
end
end
def visit_Arel_Nodes_DoesNotMatch o, collector
op = o.case_sensitive ? ' NOT LIKE ' : ' NOT ILIKE '
collector = infix_value o, collector, op
if o.escape
collector << ' ESCAPE '
visit o.escape, collector
else
collector
end
end
def visit_Arel_Nodes_Regexp o, collector
op = o.case_sensitive ? ' ~ ' : ' ~* '
infix_value o, collector, op
end
def visit_Arel_Nodes_NotRegexp o, collector
op = o.case_sensitive ? ' !~ ' : ' !~* '
infix_value o, collector, op
end
def visit_Arel_Nodes_DistinctOn o, collector
collector << "DISTINCT ON ( "
visit(o.expr, collector) << " )"
end
def visit_Arel_Nodes_BindParam o, collector
collector.add_bind(o) { |i| "$#{i}" }
end
def visit_Arel_Nodes_GroupingElement o, collector
collector << "( "
visit(o.expr, collector) << " )"
end
def visit_Arel_Nodes_Cube o, collector
collector << CUBE
grouping_array_or_grouping_element o, collector
end
def visit_Arel_Nodes_RollUp o, collector
collector << ROLLUP
grouping_array_or_grouping_element o, collector
end
def visit_Arel_Nodes_GroupingSet o, collector
collector << GROUPING_SET
grouping_array_or_grouping_element o, collector
end
# Utilized by GroupingSet, Cube & RollUp visitors to
# handle grouping aggregation semantics
def grouping_array_or_grouping_element o, collector
if o.expr.is_a? Array
collector << "( "
visit o.expr, collector
collector << " )"
else
visit o.expr, collector
end
end
end
end
end
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