Module: DuckDB::Converter

Included in:
Appender, PreparedStatement
Defined in:
lib/duckdb/converter.rb,
ext/duckdb/conveter.c

Constant Summary collapse

HALF_HUGEINT_BIT = 
64
HALF_HUGEINT = 
1 << HALF_HUGEINT_BIT
FLIP_HUGEINT = 
1 << 63

Class Method Summary collapse

Class Method Details

._to_date(year, month, day) ⇒ Object 



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# File 'lib/duckdb/converter.rb', line 14

def _to_date(year, month, day)
  Date.new(year, month, day)
end

._to_decimal_from_vector(_width, scale, lower, upper) ⇒ Object 



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# File 'lib/duckdb/converter.rb', line 26

def _to_decimal_from_vector(_width, scale, lower, upper)
  v = _to_hugeint_from_vector(lower, upper).to_s
  v = v.rjust(scale + 1, '0') if v.length < scale
  v[-scale, 0] = '.'
  BigDecimal(v)
end

._to_hugeint_from_vector(lower, upper) ⇒ Object 



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# File 'lib/duckdb/converter.rb', line 22

def _to_hugeint_from_vector(lower, upper)
  (upper << HALF_HUGEINT_BIT) + lower
end

._to_interval_from_vector(months, days, micros) ⇒ Object 



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# File 'lib/duckdb/converter.rb', line 33

def _to_interval_from_vector(months, days, micros)
  Interval.new(interval_months: months, interval_days: days, interval_micros: micros)
end

._to_time(year, month, day, hour, minute, second, microsecond) ⇒ Object 



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# File 'lib/duckdb/converter.rb', line 18

def _to_time(year, month, day, hour, minute, second, microsecond)
  Time.local(year, month, day, hour, minute, second, microsecond)
end

._to_uuid_from_vector(lower, upper) ⇒ Object 



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# File 'lib/duckdb/converter.rb', line 37

def _to_uuid_from_vector(lower, upper)
  upper = upper ^ FLIP_HUGEINT
  upper += HALF_HUGEINT if upper.negative?

  str = _to_hugeint_from_vector(lower, upper).to_s(16).rjust(32, '0')
  "#{str[0, 8]}-#{str[8, 4]}-#{str[12, 4]}-#{str[16, 4]}-#{str[20, 12]}"
end