# frozen_string_literal: true module ActiveRecord module ConnectionAdapters module CipherStashPG 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) @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) @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: @connection.escape(s) 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 # Quotes schema names for use in SQL queries. def quote_schema_name(name) ::CipherStashPG::Connection.quote_ident(name) 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] ||= ::CipherStashPG::Connection.quote_ident(super).freeze end # 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) && /\(\)/.match?(value) 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) else super end end def lookup_cast_type_from_column(column) # :nodoc: 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+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