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-rw-r--r--lib/arel/visitors/bind_substitute.rb9
-rw-r--r--lib/arel/visitors/bind_visitor.rb12
-rw-r--r--lib/arel/visitors/dot.rb3
-rw-r--r--lib/arel/visitors/mysql.rb61
-rw-r--r--lib/arel/visitors/oracle.rb47
-rw-r--r--lib/arel/visitors/postgresql.rb21
-rw-r--r--lib/arel/visitors/reduce.rb25
-rw-r--r--lib/arel/visitors/sqlite.rb5
-rw-r--r--lib/arel/visitors/to_sql.rb555
-rw-r--r--lib/arel/visitors/where_sql.rb5
10 files changed, 483 insertions, 260 deletions
diff --git a/lib/arel/visitors/bind_substitute.rb b/lib/arel/visitors/bind_substitute.rb
new file mode 100644
index 0000000000..0503a9c986
--- /dev/null
+++ b/lib/arel/visitors/bind_substitute.rb
@@ -0,0 +1,9 @@
+module Arel
+ module Visitors
+ class BindSubstitute
+ def initialize delegte
+ @delegate = delegate
+ end
+ end
+ end
+end
diff --git a/lib/arel/visitors/bind_visitor.rb b/lib/arel/visitors/bind_visitor.rb
index 5cb251ffde..c316c8d702 100644
--- a/lib/arel/visitors/bind_visitor.rb
+++ b/lib/arel/visitors/bind_visitor.rb
@@ -6,24 +6,26 @@ module Arel
super
end
- def accept node, &block
+ def accept node, collector, &block
@block = block if block_given?
super
end
private
- def visit_Arel_Nodes_Assignment o
+ def visit_Arel_Nodes_Assignment o, collector
if o.right.is_a? Arel::Nodes::BindParam
- "#{visit o.left} = #{visit o.right}"
+ collector = visit o.left, collector
+ collector << " = "
+ visit o.right, collector
else
super
end
end
- def visit_Arel_Nodes_BindParam o
+ def visit_Arel_Nodes_BindParam o, collector
if @block
- @block.call
+ @block.call(collector)
else
super
end
diff --git a/lib/arel/visitors/dot.rb b/lib/arel/visitors/dot.rb
index 99f4c467d2..ba35223ac9 100644
--- a/lib/arel/visitors/dot.rb
+++ b/lib/arel/visitors/dot.rb
@@ -23,11 +23,12 @@ module Arel
end
def accept object
- super
+ visit object
to_dot
end
private
+
def visit_Arel_Nodes_Ordering o
visit_edge o, "expr"
end
diff --git a/lib/arel/visitors/mysql.rb b/lib/arel/visitors/mysql.rb
index 3b911e826f..cf590598e1 100644
--- a/lib/arel/visitors/mysql.rb
+++ b/lib/arel/visitors/mysql.rb
@@ -2,25 +2,31 @@ module Arel
module Visitors
class MySQL < Arel::Visitors::ToSql
private
- def visit_Arel_Nodes_Union o, suppress_parens = false
- left_result = case o.left
+ def visit_Arel_Nodes_Union o, collector, suppress_parens = false
+ unless suppress_parens
+ collector << "( "
+ end
+
+ collector = case o.left
when Arel::Nodes::Union
- visit_Arel_Nodes_Union o.left, true
+ visit_Arel_Nodes_Union o.left, collector, true
else
- visit o.left
+ visit o.left, collector
end
- right_result = case o.right
+ collector << " UNION "
+
+ collector = case o.right
when Arel::Nodes::Union
- visit_Arel_Nodes_Union o.right, true
+ visit_Arel_Nodes_Union o.right, collector, true
else
- visit o.right
+ visit o.right, collector
end
if suppress_parens
- "#{left_result} UNION #{right_result}"
+ collector
else
- "( #{left_result} UNION #{right_result} )"
+ collector << " )"
end
end
@@ -31,26 +37,43 @@ module Arel
###
# :'(
# http://dev.mysql.com/doc/refman/5.0/en/select.html#id3482214
- def visit_Arel_Nodes_SelectStatement o
+ def visit_Arel_Nodes_SelectStatement o, collector
if o.offset && !o.limit
o.limit = Arel::Nodes::Limit.new(Nodes.build_quoted(18446744073709551615))
end
super
end
- def visit_Arel_Nodes_SelectCore o
+ def visit_Arel_Nodes_SelectCore o, collector
o.froms ||= Arel.sql('DUAL')
super
end
- def visit_Arel_Nodes_UpdateStatement o
- [
- "UPDATE #{visit o.relation}",
- ("SET #{o.values.map { |value| visit value }.join ', '}" unless o.values.empty?),
- ("WHERE #{o.wheres.map { |x| visit x }.join ' AND '}" unless o.wheres.empty?),
- ("ORDER BY #{o.orders.map { |x| visit x }.join(', ')}" unless o.orders.empty?),
- (visit(o.limit) if o.limit),
- ].compact.join ' '
+ def visit_Arel_Nodes_UpdateStatement o, collector
+ collector << "UPDATE "
+ collector = visit o.relation, collector
+
+ unless o.values.empty?
+ collector << "SET "
+ collector = inject_join o.values, collector, ', '
+ end
+
+ unless o.wheres.empty?
+ collector << "SET "
+ collector = inject_join o.wheres, collector, ' AND '
+ end
+
+ unless o.orders.empty?
+ collector << "ORDER BY "
+ collector = inject_join o.wheres, collector, ', '
+ end
+
+ if o.limit
+ collector << " "
+ visit(o.limit, collector)
+ else
+ collector
+ end
end
end
diff --git a/lib/arel/visitors/oracle.rb b/lib/arel/visitors/oracle.rb
index 0cd0179931..2cdbafadad 100644
--- a/lib/arel/visitors/oracle.rb
+++ b/lib/arel/visitors/oracle.rb
@@ -3,7 +3,7 @@ module Arel
class Oracle < Arel::Visitors::ToSql
private
- def visit_Arel_Nodes_SelectStatement o
+ def visit_Arel_Nodes_SelectStatement o, collector
o = order_hacks(o)
# if need to select first records without ORDER BY and GROUP BY and without DISTINCT
@@ -20,49 +20,58 @@ module Arel
limit = o.limit.expr.to_i
offset = o.offset
o.offset = nil
- sql = super(o)
- return <<-eosql
+ collector << "
SELECT * FROM (
SELECT raw_sql_.*, rownum raw_rnum_
- FROM (#{sql}) raw_sql_
+ FROM ("
+
+ collector = super(o, collector)
+ collector << ") raw_sql_
WHERE rownum <= #{offset.expr.to_i + limit}
)
- WHERE #{visit offset}
- eosql
+ WHERE "
+ return visit(offset, collector)
end
if o.limit
o = o.dup
limit = o.limit.expr
- return "SELECT * FROM (#{super(o)}) WHERE ROWNUM <= #{visit limit}"
+ collector << "SELECT * FROM ("
+ collector = super(o, collector)
+ collector << ") WHERE ROWNUM <= "
+ return visit limit, collector
end
if o.offset
o = o.dup
offset = o.offset
o.offset = nil
- sql = super(o)
- return <<-eosql
- SELECT * FROM (
+ collector << "SELECT * FROM (
SELECT raw_sql_.*, rownum raw_rnum_
- FROM (#{sql}) raw_sql_
+ FROM ("
+ collector = super(o, collector)
+ collector << ") raw_sql_
)
- WHERE #{visit offset}
- eosql
+ WHERE "
+ return visit offset, collector
end
super
end
- def visit_Arel_Nodes_Limit o
+ def visit_Arel_Nodes_Limit o, collector
+ collector
end
- def visit_Arel_Nodes_Offset o
- "raw_rnum_ > #{visit o.expr}"
+ def visit_Arel_Nodes_Offset o, collector
+ collector << "raw_rnum_ > "
+ visit o.expr, collector
end
- def visit_Arel_Nodes_Except o
- "( #{visit o.left } MINUS #{visit o.right} )"
+ def visit_Arel_Nodes_Except o, collector
+ collector << "( "
+ collector = infix_value o, collector, " MINUS "
+ collector << " )"
end
def visit_Arel_Nodes_UpdateStatement o
@@ -91,7 +100,7 @@ module Arel
#
# orders = o.orders.map { |x| visit x }.join(', ').split(',')
orders = o.orders.map do |x|
- string = visit x
+ string = visit(x, Arel::Collectors::SQLString.new).value
if string.include?(',')
split_order_string(string)
else
diff --git a/lib/arel/visitors/postgresql.rb b/lib/arel/visitors/postgresql.rb
index 49f7482e7d..60878ddd20 100644
--- a/lib/arel/visitors/postgresql.rb
+++ b/lib/arel/visitors/postgresql.rb
@@ -3,24 +3,25 @@ module Arel
class PostgreSQL < Arel::Visitors::ToSql
private
- def visit_Arel_Nodes_Matches o
- "#{visit o.left} ILIKE #{visit o.right}"
+ def visit_Arel_Nodes_Matches o, collector
+ infix_value o, collector, ' ILIKE '
end
- def visit_Arel_Nodes_DoesNotMatch o
- "#{visit o.left} NOT ILIKE #{visit o.right}"
+ def visit_Arel_Nodes_DoesNotMatch o, collector
+ infix_value o, collector, ' NOT ILIKE '
end
- def visit_Arel_Nodes_Regexp o
- "#{visit o.left} ~ #{visit o.right}"
+ def visit_Arel_Nodes_Regexp o, collector
+ infix_value o, collector, ' ~ '
end
- def visit_Arel_Nodes_NotRegexp o
- "#{visit o.left} !~ #{visit o.right}"
+ def visit_Arel_Nodes_NotRegexp o, collector
+ infix_value o, collector, ' !~ '
end
- def visit_Arel_Nodes_DistinctOn o
- "DISTINCT ON ( #{visit o.expr} )"
+ def visit_Arel_Nodes_DistinctOn o, collector
+ collector << "DISTINCT ON ( "
+ visit(o.expr, collector) << " )"
end
end
end
diff --git a/lib/arel/visitors/reduce.rb b/lib/arel/visitors/reduce.rb
new file mode 100644
index 0000000000..9670cad27c
--- /dev/null
+++ b/lib/arel/visitors/reduce.rb
@@ -0,0 +1,25 @@
+require 'arel/visitors/visitor'
+
+module Arel
+ module Visitors
+ class Reduce < Arel::Visitors::Visitor
+ def accept object, collector
+ visit object, collector
+ end
+
+ private
+
+ def visit object, collector
+ send dispatch[object.class], object, collector
+ rescue NoMethodError => e
+ raise e if respond_to?(dispatch[object.class], true)
+ superklass = object.class.ancestors.find { |klass|
+ respond_to?(dispatch[klass], true)
+ }
+ raise(TypeError, "Cannot visit #{object.class}") unless superklass
+ dispatch[object.class] = dispatch[superklass]
+ retry
+ end
+ end
+ end
+end
diff --git a/lib/arel/visitors/sqlite.rb b/lib/arel/visitors/sqlite.rb
index 2a509e95b5..ff6fc1fea4 100644
--- a/lib/arel/visitors/sqlite.rb
+++ b/lib/arel/visitors/sqlite.rb
@@ -4,10 +4,11 @@ module Arel
private
# Locks are not supported in SQLite
- def visit_Arel_Nodes_Lock o
+ def visit_Arel_Nodes_Lock o, collector
+ collector
end
- def visit_Arel_Nodes_SelectStatement o
+ def visit_Arel_Nodes_SelectStatement o, collector
o.limit = Arel::Nodes::Limit.new(-1) if o.offset && !o.limit
super
end
diff --git a/lib/arel/visitors/to_sql.rb b/lib/arel/visitors/to_sql.rb
index 84034829a5..8e254d504b 100644
--- a/lib/arel/visitors/to_sql.rb
+++ b/lib/arel/visitors/to_sql.rb
@@ -1,9 +1,10 @@
require 'bigdecimal'
require 'date'
+require 'arel/visitors/reduce'
module Arel
module Visitors
- class ToSql < Arel::Visitors::Visitor
+ class ToSql < Arel::Visitors::Reduce
##
# This is some roflscale crazy stuff. I'm roflscaling this because
# building SQL queries is a hotspot. I will explain the roflscale so that
@@ -66,11 +67,15 @@ module Arel
private
- def visit_Arel_Nodes_DeleteStatement o
- [
- "DELETE FROM #{visit o.relation}",
- ("WHERE #{o.wheres.map { |x| visit x }.join AND}" unless o.wheres.empty?)
- ].compact.join ' '
+ def visit_Arel_Nodes_DeleteStatement o, collector
+ collector << "DELETE FROM "
+ collector = visit o.relation, collector
+ if o.wheres.any?
+ collector << " WHERE "
+ inject_join o.wheres, collector, AND
+ else
+ collector
+ end
end
# FIXME: we should probably have a 2-pass visitor for this
@@ -85,18 +90,29 @@ module Arel
stmt
end
- def visit_Arel_Nodes_UpdateStatement o
+ def visit_Arel_Nodes_UpdateStatement o, collector
if o.orders.empty? && o.limit.nil?
wheres = o.wheres
else
wheres = [Nodes::In.new(o.key, [build_subselect(o.key, o)])]
end
- [
- "UPDATE #{visit o.relation}",
- ("SET #{o.values.map { |value| visit value }.join ', '}" unless o.values.empty?),
- ("WHERE #{wheres.map { |x| visit x }.join ' AND '}" unless wheres.empty?),
- ].compact.join ' '
+ collector << "UPDATE "
+ collector = visit o.relation, collector
+ values = false
+ unless o.values.empty?
+ values = true
+ collector << " SET "
+ collector = inject_join o.values, collector, ", "
+ end
+
+ unless wheres.empty?
+ collector << " " if values
+ collector << "WHERE "
+ collector = inject_join wheres, collector, " AND "
+ end
+
+ collector
end
def visit_Arel_Nodes_InsertStatement o
@@ -111,25 +127,31 @@ module Arel
].compact.join ' '
end
- def visit_Arel_Nodes_Exists o
- "EXISTS (#{visit o.expressions})#{
- o.alias ? " AS #{visit o.alias}" : ''}"
+ def visit_Arel_Nodes_Exists o, collector
+ collector << "EXISTS ("
+ collector = visit(o.expressions, collector) << ")"
+ if o.alias
+ collector << " AS "
+ visit o.alias, collector
+ else
+ collector
+ end
end
- def visit_Arel_Nodes_Casted o
- quoted o.val, o.attribute
+ def visit_Arel_Nodes_Casted o, collector
+ collector << quoted(o.val, o.attribute).to_s
end
- def visit_Arel_Nodes_Quoted o
- quoted o.expr, nil
+ def visit_Arel_Nodes_Quoted o, collector
+ collector << quoted(o.expr, nil).to_s
end
- def visit_Arel_Nodes_True o
- "TRUE"
+ def visit_Arel_Nodes_True o, collector
+ collector << "TRUE"
end
- def visit_Arel_Nodes_False o
- "FALSE"
+ def visit_Arel_Nodes_False o, collector
+ collector << "FALSE"
end
def table_exists? name
@@ -160,92 +182,104 @@ module Arel
}.join ', '})"
end
- def visit_Arel_Nodes_SelectStatement o
- str = ''
-
+ def visit_Arel_Nodes_SelectStatement o, collector
if o.with
- str << visit(o.with)
- str << SPACE
+ collector = visit o.with, collector
+ collector << SPACE
end
- o.cores.each { |x| str << visit_Arel_Nodes_SelectCore(x) }
+ collector = o.cores.inject(collector) { |c,x|
+ visit_Arel_Nodes_SelectCore(x, c)
+ }
unless o.orders.empty?
- str << SPACE
- str << ORDER_BY
+ collector << SPACE
+ collector << ORDER_BY
len = o.orders.length - 1
o.orders.each_with_index { |x, i|
- str << visit(x)
- str << COMMA unless len == i
+ collector = visit(x, collector)
+ collector << COMMA unless len == i
}
end
- str << " #{visit(o.limit)}" if o.limit
- str << " #{visit(o.offset)}" if o.offset
- str << " #{visit(o.lock)}" if o.lock
+ collector = maybe_visit o.limit, collector
+ collector = maybe_visit o.offset, collector
+ collector = maybe_visit o.lock, collector
- str.strip!
- str
+ collector
end
- def visit_Arel_Nodes_SelectCore o
- str = "SELECT"
+ def visit_Arel_Nodes_SelectCore o, collector
+ collector << "SELECT"
- str << " #{visit(o.top)}" if o.top
- str << " #{visit(o.set_quantifier)}" if o.set_quantifier
+ if o.top
+ collector << " "
+ collector = visit o.top, collector
+ end
+
+ if o.set_quantifier
+ collector << " "
+ collector = visit o.set_quantifier, collector
+ end
unless o.projections.empty?
- str << SPACE
+ collector << SPACE
len = o.projections.length - 1
o.projections.each_with_index do |x, i|
- str << visit(x)
- str << COMMA unless len == i
+ collector = visit(x, collector)
+ collector << COMMA unless len == i
end
end
- str << " FROM #{visit(o.source)}" if o.source && !o.source.empty?
+ if o.source && !o.source.empty?
+ collector << " FROM "
+ collector = visit o.source, collector
+ end
unless o.wheres.empty?
- str << WHERE
+ collector << WHERE
len = o.wheres.length - 1
o.wheres.each_with_index do |x, i|
- str << visit(x)
- str << AND unless len == i
+ collector = visit(x, collector)
+ collector << AND unless len == i
end
end
unless o.groups.empty?
- str << GROUP_BY
+ collector << GROUP_BY
len = o.groups.length - 1
o.groups.each_with_index do |x, i|
- str << visit(x)
- str << COMMA unless len == i
+ collector = visit(x, collector)
+ collector << COMMA unless len == i
end
end
- str << " #{visit(o.having)}" if o.having
+ if o.having
+ collector << " "
+ collector = visit(o.having, collector)
+ end
unless o.windows.empty?
- str << WINDOW
+ collector << WINDOW
len = o.windows.length - 1
o.windows.each_with_index do |x, i|
- str << visit(x)
- str << COMMA unless len == i
+ collector = visit(x, collector)
+ collector << COMMA unless len == i
end
end
- str
+ collector
end
def visit_Arel_Nodes_Bin o
visit o.expr
end
- def visit_Arel_Nodes_Distinct o
- DISTINCT
+ def visit_Arel_Nodes_Distinct o, collector
+ collector << DISTINCT
end
- def visit_Arel_Nodes_DistinctOn o
+ def visit_Arel_Nodes_DistinctOn o, collector
raise NotImplementedError, 'DISTINCT ON not implemented for this db'
end
@@ -253,64 +287,91 @@ module Arel
"WITH #{o.children.map { |x| visit x }.join(', ')}"
end
- def visit_Arel_Nodes_WithRecursive o
- "WITH RECURSIVE #{o.children.map { |x| visit x }.join(', ')}"
+ def visit_Arel_Nodes_WithRecursive o, collector
+ collector << "WITH RECURSIVE "
+ inject_join o.children, collector, ', '
end
- def visit_Arel_Nodes_Union o
- "( #{visit o.left} UNION #{visit o.right} )"
+ def visit_Arel_Nodes_Union o, collector
+ collector << "( "
+ infix_value(o, collector, " UNION ") << " )"
end
- def visit_Arel_Nodes_UnionAll o
- "( #{visit o.left} UNION ALL #{visit o.right} )"
+ def visit_Arel_Nodes_UnionAll o, collector
+ collector << "( "
+ infix_value(o, collector, " UNION ALL ") << " )"
end
- def visit_Arel_Nodes_Intersect o
- "( #{visit o.left} INTERSECT #{visit o.right} )"
+ def visit_Arel_Nodes_Intersect o, collector
+ collector << "( "
+ infix_value(o, collector, " INTERSECT ") << " )"
end
- def visit_Arel_Nodes_Except o
- "( #{visit o.left} EXCEPT #{visit o.right} )"
+ def visit_Arel_Nodes_Except o, collector
+ collector << "( "
+ infix_value(o, collector, " EXCEPT ") << " )"
end
- def visit_Arel_Nodes_NamedWindow o
- "#{quote_column_name o.name} AS #{visit_Arel_Nodes_Window o}"
+ def visit_Arel_Nodes_NamedWindow o, collector
+ collector << quote_column_name(o.name)
+ collector << " AS "
+ visit_Arel_Nodes_Window o, collector
end
- def visit_Arel_Nodes_Window o
- s = [
- ("ORDER BY #{o.orders.map { |x| visit(x) }.join(', ')}" unless o.orders.empty?),
- (visit o.framing if o.framing)
- ].compact.join ' '
- "(#{s})"
+ def visit_Arel_Nodes_Window o, collector
+ collector << "("
+ if o.orders.any?
+ collector << "ORDER BY "
+ collector = inject_join o.orders, collector, ", "
+ end
+
+ if o.framing
+ collector = visit o.framing, collector
+ end
+
+ collector << ")"
end
- def visit_Arel_Nodes_Rows o
+ def visit_Arel_Nodes_Rows o, collector
if o.expr
- "ROWS #{visit o.expr}"
+ collector << "ROWS "
+ visit o.expr, collector
else
- "ROWS"
+ collector << "ROWS"
end
end
- def visit_Arel_Nodes_Range o
+ def visit_Arel_Nodes_Range o, collector
if o.expr
- "RANGE #{visit o.expr}"
+ collector << "RANGE "
+ visit o.expr, collector
else
- "RANGE"
+ collector << "RANGE"
end
end
- def visit_Arel_Nodes_Preceding o
- "#{o.expr ? visit(o.expr) : 'UNBOUNDED'} PRECEDING"
+ def visit_Arel_Nodes_Preceding o, collector
+ collector = if o.expr
+ visit o.expr, collector
+ else
+ collector << "UNBOUNDED"
+ end
+
+ collector << " PRECEDING"
end
- def visit_Arel_Nodes_Following o
- "#{o.expr ? visit(o.expr) : 'UNBOUNDED'} FOLLOWING"
+ def visit_Arel_Nodes_Following o, collector
+ collector = if o.expr
+ visit o.expr, collector
+ else
+ collector << "UNBOUNDED"
+ end
+
+ collector << " FOLLOWING"
end
- def visit_Arel_Nodes_CurrentRow o
- "CURRENT ROW"
+ def visit_Arel_Nodes_CurrentRow o, collector
+ collector << "CURRENT ROW"
end
def visit_Arel_Nodes_Over o
@@ -326,236 +387,287 @@ module Arel
end
end
- def visit_Arel_Nodes_Having o
- "HAVING #{visit o.expr}"
+ def visit_Arel_Nodes_Having o, collector
+ collector << "HAVING "
+ visit o.expr, collector
end
- def visit_Arel_Nodes_Offset o
- "OFFSET #{visit o.expr}"
+ def visit_Arel_Nodes_Offset o, collector
+ collector << "OFFSET "
+ visit o.expr, collector
end
- def visit_Arel_Nodes_Limit o
- "LIMIT #{visit o.expr}"
+ def visit_Arel_Nodes_Limit o, collector
+ collector << "LIMIT "
+ visit o.expr, collector
end
# FIXME: this does nothing on most databases, but does on MSSQL
- def visit_Arel_Nodes_Top o
- ""
+ def visit_Arel_Nodes_Top o, collector
+ collector
end
- def visit_Arel_Nodes_Lock o
- visit o.expr
+ def visit_Arel_Nodes_Lock o, collector
+ visit o.expr, collector
end
- def visit_Arel_Nodes_Grouping o
- "(#{visit o.expr})"
+ def visit_Arel_Nodes_Grouping o, collector
+ collector << "("
+ visit(o.expr, collector) << ")"
end
- def visit_Arel_SelectManager o
- "(#{o.to_sql.rstrip})"
+ def visit_Arel_SelectManager o, collector
+ collector << "(#{o.to_sql.rstrip})"
end
- def visit_Arel_Nodes_Ascending o
- "#{visit o.expr} ASC"
+ def visit_Arel_Nodes_Ascending o, collector
+ visit(o.expr, collector) << " ASC"
end
- def visit_Arel_Nodes_Descending o
- "#{visit o.expr} DESC"
+ def visit_Arel_Nodes_Descending o, collector
+ visit(o.expr, collector) << " DESC"
end
- def visit_Arel_Nodes_Group o
- visit o.expr
+ def visit_Arel_Nodes_Group o, collector
+ visit o.expr, collector
end
- def visit_Arel_Nodes_NamedFunction o
- "#{o.name}(#{o.distinct ? 'DISTINCT ' : ''}#{o.expressions.map { |x|
- visit x
- }.join(', ')})#{o.alias ? " AS #{visit o.alias}" : ''}"
+ def visit_Arel_Nodes_NamedFunction o, collector
+ collector << o.name
+ collector << "("
+ collector << "DISTINCT " if o.distinct
+ collector = inject_join(o.expressions, collector, ", ") << ")"
+ if o.alias
+ collector << " AS "
+ visit o.alias, collector
+ else
+ collector
+ end
end
def visit_Arel_Nodes_Extract o
"EXTRACT(#{o.field.to_s.upcase} FROM #{visit o.expr})#{o.alias ? " AS #{visit o.alias}" : ''}"
end
- def visit_Arel_Nodes_Count o
- "COUNT(#{o.distinct ? 'DISTINCT ' : ''}#{o.expressions.map { |x|
- visit x
- }.join(', ')})#{o.alias ? " AS #{visit o.alias}" : ''}"
+ def visit_Arel_Nodes_Count o, collector
+ aggregate "COUNT", o, collector
end
- def visit_Arel_Nodes_Sum o
- "SUM(#{o.distinct ? 'DISTINCT ' : ''}#{o.expressions.map { |x|
- visit x}.join(', ')})#{o.alias ? " AS #{visit o.alias}" : ''}"
+ def visit_Arel_Nodes_Sum o, collector
+ aggregate "SUM", o, collector
end
- def visit_Arel_Nodes_Max o
- "MAX(#{o.distinct ? 'DISTINCT ' : ''}#{o.expressions.map { |x|
- visit x}.join(', ')})#{o.alias ? " AS #{visit o.alias}" : ''}"
+ def visit_Arel_Nodes_Max o, collector
+ aggregate "MAX", o, collector
end
- def visit_Arel_Nodes_Min o
- "MIN(#{o.distinct ? 'DISTINCT ' : ''}#{o.expressions.map { |x|
- visit x }.join(', ')})#{o.alias ? " AS #{visit o.alias}" : ''}"
+ def visit_Arel_Nodes_Min o, collector
+ aggregate "MIN", o, collector
end
- def visit_Arel_Nodes_Avg o
- "AVG(#{o.distinct ? 'DISTINCT ' : ''}#{o.expressions.map { |x|
- visit x }.join(', ')})#{o.alias ? " AS #{visit o.alias}" : ''}"
+ def visit_Arel_Nodes_Avg o, collector
+ aggregate "AVG", o, collector
end
- def visit_Arel_Nodes_TableAlias o
- "#{visit o.relation} #{quote_table_name o.name}"
+ def visit_Arel_Nodes_TableAlias o, collector
+ collector = visit o.relation, collector
+ collector << " "
+ collector << quote_table_name(o.name)
end
- def visit_Arel_Nodes_Between o
- "#{visit o.left} BETWEEN #{visit o.right}"
+ def visit_Arel_Nodes_Between o, collector
+ collector = visit o.left, collector
+ collector << " BETWEEN "
+ visit o.right, collector
end
- def visit_Arel_Nodes_GreaterThanOrEqual o
- "#{visit o.left} >= #{visit o.right}"
+ def visit_Arel_Nodes_GreaterThanOrEqual o, collector
+ collector = visit o.left, collector
+ collector << " >= "
+ visit o.right, collector
end
- def visit_Arel_Nodes_GreaterThan o
- "#{visit o.left} > #{visit o.right}"
+ def visit_Arel_Nodes_GreaterThan o, collector
+ collector = visit o.left, collector
+ collector << " > "
+ visit o.right, collector
end
- def visit_Arel_Nodes_LessThanOrEqual o
- "#{visit o.left} <= #{visit o.right}"
+ def visit_Arel_Nodes_LessThanOrEqual o, collector
+ collector = visit o.left, collector
+ collector << " <= "
+ visit o.right, collector
end
- def visit_Arel_Nodes_LessThan o
- "#{visit o.left} < #{visit o.right}"
+ def visit_Arel_Nodes_LessThan o, collector
+ collector = visit o.left, collector
+ collector << " < "
+ visit o.right, collector
end
- def visit_Arel_Nodes_Matches o
- "#{visit o.left} LIKE #{visit o.right}"
+ def visit_Arel_Nodes_Matches o, collector
+ collector = visit o.left, collector
+ collector << " LIKE "
+ visit o.right, collector
end
- def visit_Arel_Nodes_DoesNotMatch o
- "#{visit o.left} NOT LIKE #{visit o.right}"
+ def visit_Arel_Nodes_DoesNotMatch o, collector
+ collector = visit o.left, collector
+ collector << " NOT LIKE "
+ visit o.right, collector
end
- def visit_Arel_Nodes_Regexp o
- raise NotImplementedError, '~ not implemented for this db'
+ def visit_Arel_Nodes_JoinSource o, collector
+ if o.left
+ collector = visit o.left, collector
+ end
+ if o.right.any?
+ collector << " " if o.left
+ collector = inject_join o.right, collector, ' '
+ end
+ collector
end
- def visit_Arel_Nodes_NotRegexp o
- raise NotImplementedError, '!~ not implemented for this db'
+ def visit_Arel_Nodes_Regexp o, collector
+ raise NotImplementedError, '~ not implemented for this db'
end
- def visit_Arel_Nodes_JoinSource o
- [
- (visit(o.left) if o.left),
- o.right.map { |j| visit j }.join(' ')
- ].compact.join ' '
+ def visit_Arel_Nodes_NotRegexp o, collector
+ raise NotImplementedError, '!~ not implemented for this db'
end
- def visit_Arel_Nodes_StringJoin o
- visit o.left
+ def visit_Arel_Nodes_StringJoin o, collector
+ visit o.left, collector
end
def visit_Arel_Nodes_FullOuterJoin o
"FULL OUTER JOIN #{visit o.left} #{visit o.right}"
end
- def visit_Arel_Nodes_OuterJoin o
- "LEFT OUTER JOIN #{visit o.left} #{visit o.right}"
+ def visit_Arel_Nodes_OuterJoin o, collector
+ collector << "LEFT OUTER JOIN "
+ collector = visit o.left, collector
+ collector << " "
+ visit o.right, collector
end
def visit_Arel_Nodes_RightOuterJoin o
"RIGHT OUTER JOIN #{visit o.left} #{visit o.right}"
end
- def visit_Arel_Nodes_InnerJoin o
- s = "INNER JOIN #{visit o.left}"
+ def visit_Arel_Nodes_InnerJoin o, collector
+ collector << "INNER JOIN "
+ collector = visit o.left, collector
if o.right
- s << SPACE
- s << visit(o.right)
+ collector << SPACE
+ visit(o.right, collector)
+ else
+ collector
end
- s
end
- def visit_Arel_Nodes_On o
- "ON #{visit o.expr}"
+ def visit_Arel_Nodes_On o, collector
+ collector << "ON "
+ visit o.expr, collector
end
- def visit_Arel_Nodes_Not o
- "NOT (#{visit o.expr})"
+ def visit_Arel_Nodes_Not o, collector
+ collector << "NOT ("
+ visit(o.expr, collector) << ")"
end
- def visit_Arel_Table o
+ def visit_Arel_Table o, collector
if o.table_alias
- "#{quote_table_name o.name} #{quote_table_name o.table_alias}"
+ collector << "#{quote_table_name o.name} #{quote_table_name o.table_alias}"
else
- quote_table_name o.name
+ collector << quote_table_name(o.name)
end
end
- def visit_Arel_Nodes_In o
+ def visit_Arel_Nodes_In o, collector
if Array === o.right && o.right.empty?
- '1=0'
+ collector << '1=0'
else
- "#{visit o.left} IN (#{visit o.right})"
+ collector = visit o.left, collector
+ collector << " IN ("
+ visit(o.right, collector) << ")"
end
end
- def visit_Arel_Nodes_NotIn o
+ def visit_Arel_Nodes_NotIn o, collector
if Array === o.right && o.right.empty?
- '1=1'
+ collector << '1=1'
else
- "#{visit o.left} NOT IN (#{visit o.right})"
+ collector = visit o.left, collector
+ collector << " NOT IN ("
+ collector = visit o.right, collector
+ collector << ")"
end
end
- def visit_Arel_Nodes_And o
- o.children.map { |x| visit x}.join ' AND '
+ def visit_Arel_Nodes_And o, collector
+ inject_join o.children, collector, " AND "
end
- def visit_Arel_Nodes_Or o
- "#{visit o.left} OR #{visit o.right}"
+ def visit_Arel_Nodes_Or o, collector
+ collector = visit o.left, collector
+ collector << " OR "
+ visit o.right, collector
end
- def visit_Arel_Nodes_Assignment o
+ def visit_Arel_Nodes_Assignment o, collector
case o.right
when Arel::Nodes::UnqualifiedColumn, Arel::Attributes::Attribute
- "#{visit o.left} = #{visit o.right}"
+ collector = visit o.left, collector
+ collector << " = "
+ visit o.right, collector
else
- right = quote(o.right, column_for(o.left))
- "#{visit o.left} = #{right}"
+ collector = visit o.left, collector
+ collector << " = "
+ collector << quote(o.right, column_for(o.left)).to_s
end
end
- def visit_Arel_Nodes_Equality o
+ def visit_Arel_Nodes_Equality o, collector
right = o.right
+ collector = visit o.left, collector
+
if right.nil?
- "#{visit o.left} IS NULL"
+ collector << " IS NULL"
else
- "#{visit o.left} = #{visit right}"
+ collector << " = "
+ visit right, collector
end
end
- def visit_Arel_Nodes_NotEqual o
+ def visit_Arel_Nodes_NotEqual o, collector
right = o.right
+ collector = visit o.left, collector
+
if right.nil?
- "#{visit o.left} IS NOT NULL"
+ collector << " IS NOT NULL"
else
- "#{visit o.left} != #{visit right}"
+ collector << " != "
+ visit right, collector
end
end
- def visit_Arel_Nodes_As o
- "#{visit o.left} AS #{visit o.right}"
+ def visit_Arel_Nodes_As o, collector
+ collector = visit o.left, collector
+ collector << " AS "
+ visit o.right, collector
end
- def visit_Arel_Nodes_UnqualifiedColumn o
- "#{quote_column_name o.name}"
+ def visit_Arel_Nodes_UnqualifiedColumn o, collector
+ collector << "#{quote_column_name o.name}"
+ collector
end
- def visit_Arel_Attributes_Attribute o
+ def visit_Arel_Attributes_Attribute o, collector
join_name = o.relation.table_alias || o.relation.name
- "#{quote_table_name join_name}.#{quote_column_name o.name}"
+ collector << "#{quote_table_name join_name}.#{quote_column_name o.name}"
end
alias :visit_Arel_Attributes_Integer :visit_Arel_Attributes_Attribute
alias :visit_Arel_Attributes_Float :visit_Arel_Attributes_Attribute
@@ -564,7 +676,7 @@ module Arel
alias :visit_Arel_Attributes_Time :visit_Arel_Attributes_Attribute
alias :visit_Arel_Attributes_Boolean :visit_Arel_Attributes_Attribute
- def literal o; o end
+ def literal o, collector; collector << o.to_s; end
alias :visit_Arel_Nodes_BindParam :literal
alias :visit_Arel_Nodes_SqlLiteral :literal
@@ -594,8 +706,10 @@ module Arel
alias :visit_Time :unsupported
alias :visit_TrueClass :unsupported
- def visit_Arel_Nodes_InfixOperation o
- "#{visit o.left} #{o.operator} #{visit o.right}"
+ def visit_Arel_Nodes_InfixOperation o, collector
+ collector = visit o.left, collector
+ collector << " #{o.operator} "
+ visit o.right, collector
end
alias :visit_Arel_Nodes_Addition :visit_Arel_Nodes_InfixOperation
@@ -603,8 +717,8 @@ module Arel
alias :visit_Arel_Nodes_Multiplication :visit_Arel_Nodes_InfixOperation
alias :visit_Arel_Nodes_Division :visit_Arel_Nodes_InfixOperation
- def visit_Array o
- o.map { |x| visit x }.join(', ')
+ def visit_Array o, collector
+ inject_join o, collector, ", "
end
def quote value, column = nil
@@ -620,6 +734,43 @@ module Arel
def quote_column_name name
@quoted_columns[name] ||= Arel::Nodes::SqlLiteral === name ? name : @connection.quote_column_name(name)
end
+
+ def maybe_visit thing, collector
+ return collector unless thing
+ collector << " "
+ visit thing, collector
+ end
+
+ def inject_join list, collector, join_str
+ len = list.length - 1
+ list.each_with_index.inject(collector) { |c, (x,i)|
+ if i == len
+ visit x, c
+ else
+ visit(x, c) << join_str
+ end
+ }
+ end
+
+ def infix_value o, collector, value
+ collector = visit o.left, collector
+ collector << value
+ visit o.right, collector
+ end
+
+ def aggregate name, o, collector
+ collector << "#{name}("
+ if o.distinct
+ collector << "DISTINCT "
+ end
+ collector = inject_join(o.expressions, collector, ", ") << ")"
+ if o.alias
+ collector << " AS "
+ visit o.alias, collector
+ else
+ collector
+ end
+ end
end
end
end
diff --git a/lib/arel/visitors/where_sql.rb b/lib/arel/visitors/where_sql.rb
index acd84cd631..27dde73673 100644
--- a/lib/arel/visitors/where_sql.rb
+++ b/lib/arel/visitors/where_sql.rb
@@ -1,8 +1,9 @@
module Arel
module Visitors
class WhereSql < Arel::Visitors::ToSql
- def visit_Arel_Nodes_SelectCore o
- "WHERE #{o.wheres.map { |x| visit x}.join ' AND ' }"
+ def visit_Arel_Nodes_SelectCore o, collector
+ collector << "WHERE "
+ inject_join o.wheres, collector, ' AND '
end
end
end
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-17 03:14:00 +0000