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实例公共方法

check_int_in_range(value)

# File activerecord/lib/active_record/connection_adapters/postgresql/quoting.rb, line 28
        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

column_name_matcher()

# File activerecord/lib/active_record/connection_adapters/postgresql/quoting.rb, line 156
def column_name_matcher
  COLUMN_NAME
end

column_name_with_order_matcher()

# File activerecord/lib/active_record/connection_adapters/postgresql/quoting.rb, line 160
def column_name_with_order_matcher
  COLUMN_NAME_WITH_ORDER
end

escape_bytea(value)

转义二进制字符串以供数据库输入 bytea。

# File activerecord/lib/active_record/connection_adapters/postgresql/quoting.rb, line 17
def escape_bytea(value)
  valid_raw_connection.escape_bytea(value) if value
end

quote_schema_name(name)

引用 SQL 查询中使用的架构名称。

# File activerecord/lib/active_record/connection_adapters/postgresql/quoting.rb, line 93
def quote_schema_name(name)
  PG::Connection.quote_ident(name)
end

quote_table_name_for_assignment(table, attr)

# File activerecord/lib/active_record/connection_adapters/postgresql/quoting.rb, line 97
def quote_table_name_for_assignment(table, attr)
  quote_column_name(attr)
end

unescape_bytea(value)

将数据库中的 bytea 输出还原为它表示的二进制字符串。注意:这不是 escape_bytea 的逆运算!这只能用于数据库驱动程序转义的二进制输出。

# File activerecord/lib/active_record/connection_adapters/postgresql/quoting.rb, line 24
def unescape_bytea(value)
  valid_raw_connection.unescape_bytea(value) if value
end