# strings
ops.Substring: _substr,
ops.StringFind: _string_find,
ops.Capitalize: _capitalize,
ops.RegexSearch: infix_op('REGEXP'),
# math
ops.Log: _log,
ops.Log2: unary(sa.func.log2),
ops.Log10: unary(sa.func.log10),
ops.Round: _round,
ops.RandomScalar: _random,
# dates and times
ops.Date: unary(sa.func.date),
ops.DateAdd: infix_op('+'),
ops.DateSub: infix_op('-'),
ops.DateDiff: fixed_arity(sa.func.datediff, 2),
ops.TimestampAdd: infix_op('+'),
ops.TimestampSub: infix_op('-'),
ops.TimestampDiff: _timestamp_diff,
ops.DateTruncate: _truncate,
ops.TimestampTruncate: _truncate,
ops.IntervalFromInteger: _interval_from_integer,
ops.Strftime: fixed_arity(sa.func.date_format, 2),
ops.ExtractYear: _extract('year'),
ops.ExtractMonth: _extract('month'),
ops.ExtractDay: _extract('day'),
ops.ExtractDayOfYear: unary('dayofyear'),
ops.ExtractQuarter: _extract('quarter'),
ops.ExtractEpochSeconds: unary('UNIX_TIMESTAMP'),
ops.ExtractWeekOfYear: fixed_arity('weekofyear', 1),
ops.ExtractHour: _extract('hour'),
unary(sa.func.log2),
ops.Log10:
unary(sa.func.log10),
ops.Round:
_round,
ops.RandomScalar:
_random,
# dates and times
ops.Date:
unary(sa.func.date),
ops.DateAdd:
infix_op('+'),
ops.DateSub:
infix_op('-'),
ops.DateDiff:
fixed_arity(sa.func.datediff, 2),
ops.TimestampAdd:
infix_op('+'),
ops.TimestampSub:
infix_op('-'),
ops.TimestampDiff:
_timestamp_diff,
ops.DateTruncate:
_truncate,
ops.TimestampTruncate:
_truncate,
ops.IntervalFromInteger:
_interval_from_integer,
ops.Strftime:
fixed_arity(sa.func.date_format, 2),
ops.ExtractYear:
# We override this here to support time zones ops.TableColumn: _table_column, # types ops.Cast: _cast, ops.TypeOf: _typeof, # Floating ops.IsNan: _is_nan, ops.IsInf: _is_inf, # null handling ops.IfNull: fixed_arity(sa.func.coalesce, 2), # boolean reductions ops.Any: unary(sa.func.bool_or), ops.All: unary(sa.func.bool_and), ops.NotAny: unary(lambda x: sa.not_(sa.func.bool_or(x))), ops.NotAll: unary(lambda x: sa.not_(sa.func.bool_and(x))), # strings ops.Substring: _substr, ops.StringFind: _string_find, ops.GroupConcat:
_operation_registry = alch._operation_registry.copy()
_operation_registry.update(
{
# aggregate methods
ops.Count: _reduction(sa.func.count),
ops.Max: _reduction('max'),
ops.Min: _reduction('min'),
ops.Sum: _reduction('sum'),
ops.Mean: _reduction('avg', 'float64'),
# string methods
ops.LStrip: unary(sa.func.ltrim),
ops.Lowercase: unary(sa.func.lower),
ops.RStrip: unary(sa.func.rtrim),
ops.Repeat: fixed_arity(sa.func.replicate, 2),
ops.Reverse: unary(sa.func.reverse),
ops.StringFind: _string_find,
ops.StringLength: unary(sa.func.length),
ops.StringReplace: fixed_arity(sa.func.replace, 3),
ops.Strip: unary(sa.func.trim),
ops.Substring: _substr,
ops.Uppercase: unary(sa.func.upper),
# math
ops.Abs: unary(sa.func.abs),
ops.Acos: unary(sa.func.acos),
ops.Asin: unary(sa.func.asin),
ops.Atan2: fixed_arity(sa.func.atn2, 2),
ops.Atan: unary(sa.func.atan),
ops.Ceil: unary(sa.func.ceiling),
ops.Cos: unary(sa.func.cos),
def _rpad(t, expr):
arg, length, pad = map(t.translate, expr.op().args)
return arg + _generic_pad(arg, length, pad)
_operation_registry.update(
{
ops.Cast: _cast,
ops.Substring: _substr,
ops.StrRight: _string_right,
ops.StringFind: _string_find,
ops.Least: varargs(sa.func.min),
ops.Greatest: varargs(sa.func.max),
ops.IfNull: fixed_arity(sa.func.ifnull, 2),
ops.DateTruncate: _truncate(sa.func.date),
ops.TimestampTruncate: _truncate(sa.func.datetime),
ops.Strftime: _strftime,
ops.ExtractYear: _strftime_int('%Y'),
ops.ExtractMonth: _strftime_int('%m'),
ops.ExtractDay: _strftime_int('%d'),
ops.ExtractDayOfYear: _strftime_int('%j'),
ops.ExtractQuarter: _extract_quarter,
ops.ExtractEpochSeconds: _extract_epoch_seconds,
ops.ExtractHour: _strftime_int('%H'),
ops.ExtractMinute: _strftime_int('%M'),
ops.ExtractSecond: _strftime_int('%S'),
ops.ExtractMillisecond: _millisecond,
ops.TimestampNow: _now,
ops.IdenticalTo: _identical_to,
_operation_registry.update({
ops.Cast:
_cast,
ops.Substring:
_substr,
ops.StrRight:
_string_right,
ops.StringFind:
_string_find,
ops.Least:
varargs(sa.func.min),
ops.Greatest:
varargs(sa.func.max),
ops.IfNull:
fixed_arity(sa.func.ifnull, 2),
ops.DateTruncate:
_truncate(sa.func.date),
ops.TimestampTruncate:
_truncate(sa.func.datetime),
ops.Strftime:
_strftime,
ops.ExtractYear:
_strftime_int('%Y'),
ops.ExtractMonth:
_strftime_int('%m'),
ops.ExtractDay:
_strftime_int('%d'),
ops.ExtractDayOfYear:
_strftime_int('%j'),
ops.ExtractQuarter:
def _day_of_week_name(t, expr):
(sa_arg,) = map(t.translate, expr.op().args)
return sa.func.dayname(sa_arg)
_operation_registry.update(
{
ops.Literal: _literal,
ops.TableColumn: _table_column,
# types
ops.Cast: _cast,
# Floating
ops.IsNan: _is_nan,
ops.IsInf: _is_inf,
# null handling
ops.IfNull: fixed_arity(sa.func.coalesce, 2),
# boolean reductions
ops.Any: unary(sa.func.bool_or),
ops.All: unary(sa.func.bool_and),
ops.NotAny: unary(lambda x: sa.not_(sa.func.bool_or(x))),
ops.NotAll: unary(lambda x: sa.not_(sa.func.bool_and(x))),
# strings
ops.Substring: _substr,
ops.StringFind: _string_find,
ops.GroupConcat: _string_agg,
ops.Capitalize: unary(sa.func.initcap),
ops.RegexSearch: fixed_arity(sa.func.REGEXP_INSTR, 2),
ops.RegexReplace: _regex_replace,
ops.Translate: fixed_arity('translate', 3),
ops.RegexExtract: _regex_extract,
ops.StringJoin: _string_join,
_operation_registry.update({
ops.Literal:
_literal,
# We override this here to support time zones
ops.TableColumn:
_table_column,
# types
ops.Cast:
_cast,
ops.TypeOf:
_typeof,
# null handling
ops.IfNull:
fixed_arity(sa.func.coalesce, 2),
# boolean reductions
ops.Any:
unary(sa.func.bool_or),
ops.All:
unary(sa.func.bool_and),
ops.NotAny:
unary(lambda x: sa.not_(sa.func.bool_or(x))),
ops.NotAll:
unary(lambda x: sa.not_(sa.func.bool_and(x))),
# strings
ops.Substring:
_substr,
ops.StringFind:
_string_find,
ops.GroupConcat: