Method CastToDateVal

be/src/exprs/cast-functions-ir.cc:546–573

}

DateVal CastFunctions::CastToDateVal(FunctionContext* ctx, const StringVal& val) {
  DCHECK(ctx != nullptr);
  if (val.is_null) return DateVal::null();
  const char* string_val = reinterpret_cast<const char*>(val.ptr);
  const DateTimeFormatContext* format_ctx =
      reinterpret_cast<const DateTimeFormatContext*>(
          ctx->GetFunctionState(FunctionContext::FRAGMENT_LOCAL));
  DateValue dv;
  if (format_ctx != nullptr) {
    dv = DateValue::ParseIsoSqlFormat(string_val, val.len, *format_ctx);
  } else {
    dv = DateValue::ParseSimpleDateFormat(string_val, val.len, true);
  }
  if (UNLIKELY(!dv.IsValid())) {
    string invalid_val = string(string_val, val.len);
    string error_msg;
    if (format_ctx == nullptr) {
      error_msg = Substitute("String to Date parse failed. Invalid string val: '$0'",
        invalid_val);
    } else {
      error_msg = Substitute("String to Date parse failed. Input '$0' doesn't match "
        "with format '$1'", invalid_val, format_ctx->fmt);
    }
    ctx->SetError(error_msg.c_str());
    return DateVal::null();
  }
  return dv.ToDateVal();
}

DateVal CastFunctions::CastToDateVal(FunctionContext* ctx, const TimestampVal& val) {
  if (val.is_null) return DateVal::null();