Module: ActiveRecord::ConnectionAdapters::Redshift::Quoting

Included in:
ActiveRecord::ConnectionAdapters::RedshiftAdapter
Defined in:
lib/active_record/connection_adapters/redshift/quoting.rb

Instance Method Summary collapse

Instance Method Details

#escape_bytea(value) ⇒ Object

Escapes binary strings for bytea input to the database.



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# File 'lib/active_record/connection_adapters/redshift/quoting.rb', line 8

def escape_bytea(value)
  @connection.escape_bytea(value) if value
end

#quote(value) ⇒ Object 



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# File 'lib/active_record/connection_adapters/redshift/quoting.rb', line 70

def quote(value)
  case value
  when Type::Binary::Data
    "'#{escape_bytea(value.to_s)}'"
  when Float
    if value.infinite? || value.nan?
      "'#{value}'"
    else
      super
    end
  else
    super
  end
end

#quote_column_name(name) ⇒ Object

Quotes column names for use in SQL queries.



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# File 'lib/active_record/connection_adapters/redshift/quoting.rb', line 41

def quote_column_name(name) # :nodoc:
  PG::Connection.quote_ident(name.to_s)
end

#quote_default_value(value, column) ⇒ Object

Does not quote function default values for UUID columns



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# File 'lib/active_record/connection_adapters/redshift/quoting.rb', line 62

def quote_default_value(value, column) # :nodoc:
  if column.type == :uuid && value =~ /\(\)/
    value
  else
    quote(value, column)
  end
end

#quote_schema_name(name) ⇒ Object

Quotes schema names for use in SQL queries.



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# File 'lib/active_record/connection_adapters/redshift/quoting.rb', line 46

def quote_schema_name(name)
  PG::Connection.quote_ident(name)
end

#quote_string(s) ⇒ Object

Quotes strings for use in SQL input.



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# File 'lib/active_record/connection_adapters/redshift/quoting.rb', line 20

def quote_string(s) # :nodoc:
  @connection.escape(s)
end

#quote_table_name(name) ⇒ Object

Checks the following cases:

  • table_name

  • “table.name”

  • schema_name.table_name

  • schema_name.“table.name”

  • “schema.name”.table_name

  • “schema.name”.“table.name”



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# File 'lib/active_record/connection_adapters/redshift/quoting.rb', line 32

def quote_table_name(name)
  Utils.extract_schema_qualified_name(name.to_s).quoted
end

#quote_table_name_for_assignment(_table, attr) ⇒ Object 



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# File 'lib/active_record/connection_adapters/redshift/quoting.rb', line 36

def quote_table_name_for_assignment(_table, attr)
  quote_column_name(attr)
end

#quoted_date(value) ⇒ Object

Quote date/time values for use in SQL input.



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# File 'lib/active_record/connection_adapters/redshift/quoting.rb', line 51

def quoted_date(value) # :nodoc:
  result = super

  if value.year <= 0
    bce_year = format('%04d', -value.year + 1)
    result = "#{result.sub(/^-?\d+/, bce_year)} BC"
  end
  result
end

#type_cast(value) ⇒ Object 



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# File 'lib/active_record/connection_adapters/redshift/quoting.rb', line 85

def type_cast(value)
  case value
  when Type::Binary::Data
    # Return a bind param hash with format as binary.
    # See http://deveiate.org/code/pg/PGconn.html#method-i-exec_prepared-doc
    # for more information
    { value: value.to_s, format: 1 }
  else
    super
  end
end

#unescape_bytea(value) ⇒ Object

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.



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# File 'lib/active_record/connection_adapters/redshift/quoting.rb', line 15

def unescape_bytea(value)
  @connection.unescape_bytea(value) if value
end