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quoting.rb
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quoting.rb
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# frozen_string_literal: true
module ActiveRecord
module ConnectionAdapters
module PostgreSQL
module Quoting
QUOTED_COLUMN_NAMES = Concurrent::Map.new # :nodoc:
QUOTED_TABLE_NAMES = Concurrent::Map.new # :nodoc:
class IntegerOutOf64BitRange < StandardError
def initialize(msg)
super(msg)
end
end
# Escapes binary strings for bytea input to the database.
def escape_bytea(value)
valid_raw_connection.escape_bytea(value) if value
end
# Unescapes bytea output from a database to the binary string it represents.
# NOTE: This is NOT an inverse of escape_bytea! This is only to be used
# on escaped binary output from database drive.
def unescape_bytea(value)
valid_raw_connection.unescape_bytea(value) if value
end
def check_int_in_range(value)
if value.to_int > 9223372036854775807 || value.to_int < -9223372036854775808
exception = <<~ERROR
Provided value outside of the range of a signed 64bit integer.
PostgreSQL will treat the column type in question as a numeric.
This may result in a slow sequential scan due to a comparison
being performed between an integer or bigint value and a numeric value.
To allow for this potentially unwanted behavior, set
ActiveRecord.raise_int_wider_than_64bit to false.
ERROR
raise IntegerOutOf64BitRange.new exception
end
end
def quote(value) # :nodoc:
if ActiveRecord.raise_int_wider_than_64bit && value.is_a?(Integer)
check_int_in_range(value)
end
case value
when OID::Xml::Data
"xml '#{quote_string(value.to_s)}'"
when OID::Bit::Data
if value.binary?
"B'#{value}'"
elsif value.hex?
"X'#{value}'"
end
when Numeric
if value.finite?
super
else
"'#{value}'"
end
when OID::Array::Data
quote(encode_array(value))
when Range
quote(encode_range(value))
else
super
end
end
# Quotes strings for use in SQL input.
def quote_string(s) # :nodoc:
with_raw_connection(allow_retry: true, materialize_transactions: false) do |connection|
connection.escape(s)
end
end
# Checks the following cases:
#
# - table_name
# - "table.name"
# - schema_name.table_name
# - schema_name."table.name"
# - "schema.name".table_name
# - "schema.name"."table.name"
def quote_table_name(name) # :nodoc:
QUOTED_TABLE_NAMES[name] ||= -Utils.extract_schema_qualified_name(name.to_s).quoted.freeze
end
def quote_table_name_for_assignment(table, attr)
quote_column_name(attr)
end
# Quotes column names for use in SQL queries.
def quote_column_name(name) # :nodoc:
QUOTED_COLUMN_NAMES[name] ||= PG::Connection.quote_ident(super).freeze
end
# Quotes schema names for use in SQL queries.
alias_method :quote_schema_name, :quote_column_name
# Quote date/time values for use in SQL input.
def quoted_date(value) # :nodoc:
if value.year <= 0
bce_year = format("%04d", -value.year + 1)
super.sub(/^-?\d+/, bce_year) + " BC"
else
super
end
end
def quoted_binary(value) # :nodoc:
"'#{escape_bytea(value.to_s)}'"
end
def quote_default_expression(value, column) # :nodoc:
if value.is_a?(Proc)
value.call
elsif column.type == :uuid && value.is_a?(String) && value.include?("()")
value # Does not quote function default values for UUID columns
elsif column.respond_to?(:array?)
type = lookup_cast_type_from_column(column)
quote(type.serialize(value))
else
super
end
end
def type_cast(value) # :nodoc:
case value
when Type::Binary::Data
# Return a bind param hash with format as binary.
# See https://deveiate.org/code/pg/PG/Connection.html#method-i-exec_prepared-doc
# for more information
{ value: value.to_s, format: 1 }
when OID::Xml::Data, OID::Bit::Data
value.to_s
when OID::Array::Data
encode_array(value)
when Range
encode_range(value)
when Rational
value.to_f
else
super
end
end
def lookup_cast_type_from_column(column) # :nodoc:
verify! if type_map.nil?
type_map.lookup(column.oid, column.fmod, column.sql_type)
end
def column_name_matcher
COLUMN_NAME
end
def column_name_with_order_matcher
COLUMN_NAME_WITH_ORDER
end
COLUMN_NAME = /
\A
(
(?:
# "schema_name"."table_name"."column_name"::type_name | function(one or no argument)::type_name
((?:\w+\.|"\w+"\.){,2}(?:\w+|"\w+")(?:::\w+)? | \w+\((?:|\g<2>)\)(?:::\w+)?)
)
(?:(?:\s+AS)?\s+(?:\w+|"\w+"))?
)
(?:\s*,\s*\g<1>)*
\z
/ix
COLUMN_NAME_WITH_ORDER = /
\A
(
(?:
# "schema_name"."table_name"."column_name"::type_name | function(one or no argument)::type_name
((?:\w+\.|"\w+"\.){,2}(?:\w+|"\w+")(?:::\w+)? | \w+\((?:|\g<2>)\)(?:::\w+)?)
)
(?:\s+COLLATE\s+"\w+")?
(?:\s+ASC|\s+DESC)?
(?:\s+NULLS\s+(?:FIRST|LAST))?
)
(?:\s*,\s*\g<1>)*
\z
/ix
private_constant :COLUMN_NAME, :COLUMN_NAME_WITH_ORDER
private
def lookup_cast_type(sql_type)
super(query_value("SELECT #{quote(sql_type)}::regtype::oid", "SCHEMA").to_i)
end
def encode_array(array_data)
encoder = array_data.encoder
values = type_cast_array(array_data.values)
result = encoder.encode(values)
if encoding = determine_encoding_of_strings_in_array(values)
result.force_encoding(encoding)
end
result
end
def encode_range(range)
"[#{type_cast_range_value(range.begin)},#{type_cast_range_value(range.end)}#{range.exclude_end? ? ')' : ']'}"
end
def determine_encoding_of_strings_in_array(value)
case value
when ::Array then determine_encoding_of_strings_in_array(value.first)
when ::String then value.encoding
end
end
def type_cast_array(values)
case values
when ::Array then values.map { |item| type_cast_array(item) }
else type_cast(values)
end
end
def type_cast_range_value(value)
infinity?(value) ? "" : type_cast(value)
end
def infinity?(value)
value.respond_to?(:infinite?) && value.infinite?
end
end
end
end
end