Method CastToStringVal

be/src/exprs/cast-functions-ir.cc:364–375

CAST_FLOAT_TO_STRING(DoubleVal, DoubleToBuffer, kDoubleToBufferSize);

StringVal CastFunctions::CastToStringVal(FunctionContext* ctx, const TimestampVal& val) {
  DCHECK(ctx != nullptr);
  if (val.is_null) return StringVal::null();
  TimestampValue tv = TimestampValue::FromTimestampVal(val);
  const DateTimeFormatContext* format_ctx =
      reinterpret_cast<const DateTimeFormatContext*>(
          ctx->GetFunctionState(FunctionContext::FRAGMENT_LOCAL));
  StringVal sv =
      (format_ctx == nullptr) ? tv.ToStringVal(ctx) : tv.ToStringVal(ctx, *format_ctx);
  AnyValUtil::TruncateIfNecessary(ctx->GetReturnType(), &sv);
  return sv;
}

StringVal CastFunctions::CastToStringVal(FunctionContext* ctx, const DateVal& val) {
  DCHECK(ctx != nullptr);