diff --git a/items_0/src/items_0.rs b/items_0/src/items_0.rs
index 985deb5..dcc6768 100644
--- a/items_0/src/items_0.rs
+++ b/items_0/src/items_0.rs
@@ -59,6 +59,10 @@ pub trait Empty {
     fn empty() -> Self;
 }
 
+pub trait Appendable<STY>: Empty + WithLen {
+    fn push(&mut self, ts: u64, pulse: u64, value: STY);
+}
+
 pub trait TypeName {
     fn type_name(&self) -> String;
 }
@@ -196,3 +200,11 @@ impl PartialEq for Box<dyn Events> {
         Events::partial_eq_dyn(self.as_ref(), other.as_ref())
     }
 }
+
+pub struct TransformProperties {
+    pub needs_value: bool,
+}
+
+pub trait TransformStage {
+    fn query_transform_properties(&self) -> TransformProperties;
+}
diff --git a/items_2/src/eventsdim0.rs b/items_2/src/eventsdim0.rs
index 15b9acf..9ed69f7 100644
--- a/items_2/src/eventsdim0.rs
+++ b/items_2/src/eventsdim0.rs
@@ -6,6 +6,7 @@ use crate::TimeBinnableType;
 use crate::TimeBinnableTypeAggregator;
 use crate::TimeBinner;
 use err::Error;
+use items_0::Appendable;
 use items_0::scalar_ops::ScalarOps;
 use items_0::AsAnyMut;
 use items_0::AsAnyRef;
@@ -1153,6 +1154,15 @@ impl<NTY: ScalarOps> items_0::collect_c::Collectable for EventsDim0<NTY> {
     }
 }
 
+impl<STY> Appendable<STY> for EventsDim0<STY>
+where
+    STY: ScalarOps,
+{
+    fn push(&mut self, ts: u64, pulse: u64, value: STY) {
+        Self::push(self, ts, pulse, value)
+    }
+}
+
 #[cfg(test)]
 mod test_frame {
     use super::*;
diff --git a/items_2/src/eventsdim1.rs b/items_2/src/eventsdim1.rs
index 483ad89..b29c289 100644
--- a/items_2/src/eventsdim1.rs
+++ b/items_2/src/eventsdim1.rs
@@ -7,6 +7,7 @@ use crate::TimeBinnableTypeAggregator;
 use crate::TimeBinner;
 use err::Error;
 use items_0::scalar_ops::ScalarOps;
+use items_0::Appendable;
 use items_0::AsAnyMut;
 use items_0::AsAnyRef;
 use items_0::Empty;
@@ -1106,3 +1107,12 @@ impl<NTY: ScalarOps> items_0::collect_c::Collectable for EventsDim1<NTY> {
         Box::new(EventsDim1Collector::<NTY>::new())
     }
 }
+
+impl<STY> Appendable<Vec<STY>> for EventsDim1<STY>
+where
+    STY: ScalarOps,
+{
+    fn push(&mut self, ts: u64, pulse: u64, value: Vec<STY>) {
+        Self::push(self, ts, pulse, value)
+    }
+}
diff --git a/netpod/src/netpod.rs b/netpod/src/netpod.rs
index 3b62388..1dd5986 100644
--- a/netpod/src/netpod.rs
+++ b/netpod/src/netpod.rs
@@ -1410,7 +1410,7 @@ impl Iterator for PreBinnedPatchIterator {
     }
 }
 
-#[derive(Clone)]
+#[derive(Clone, Serialize, Deserialize)]
 pub struct BinnedGridSpec {
     bin_t_len: u64,
 }
@@ -1447,7 +1447,7 @@ impl fmt::Debug for BinnedGridSpec {
     }
 }
 
-#[derive(Clone, Debug)]
+#[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct BinnedRange {
     grid_spec: BinnedGridSpec,
     offset: u64,
diff --git a/netpod/src/transform.rs b/netpod/src/transform.rs
index a56ef19..b8c6bf1 100644
--- a/netpod/src/transform.rs
+++ b/netpod/src/transform.rs
@@ -1,12 +1,36 @@
 use crate::get_url_query_pairs;
+use crate::log::*;
 use crate::AppendToUrl;
+use crate::BinnedRange;
 use crate::FromUrl;
+use crate::NanoRange;
+use err::Error;
 use serde::Deserialize;
 use serde::Serialize;
+use std::collections::BTreeMap;
+use url::Url;
 
-#[derive(Clone, Debug, Serialize, Deserialize)]
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub enum EventTransform {
+    EventBlobsVerbatim,
+    EventBlobsUncompressed,
+    ValueFull,
+    ArrayPick(usize),
+    MinMaxAvgDev,
+    PulseIdDiff,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub enum TimeBinningTransform {
+    None,
+    TimeWeighted(BinnedRange),
+    Unweighted(BinnedRange),
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct Transform {
-    array_pick: Option<usize>,
+    event: EventTransform,
+    time_binning: TimeBinningTransform,
 }
 
 impl Transform {
@@ -16,31 +40,81 @@ impl Transform {
 }
 
 impl FromUrl for Transform {
-    fn from_url(url: &url::Url) -> Result<Self, err::Error> {
+    fn from_url(url: &Url) -> Result<Self, Error> {
         let pairs = get_url_query_pairs(url);
         Self::from_pairs(&pairs)
     }
 
-    fn from_pairs(pairs: &std::collections::BTreeMap<String, String>) -> Result<Self, err::Error> {
+    fn from_pairs(pairs: &BTreeMap<String, String>) -> Result<Self, Error> {
         let upre = Self::url_prefix();
-        let ret = Self {
-            array_pick: pairs
+        let key = "binningScheme";
+        if let Some(s) = pairs.get(key) {
+            let ret = if s == "eventBlobs" {
+                Transform {
+                    event: EventTransform::EventBlobsVerbatim,
+                    time_binning: TimeBinningTransform::None,
+                }
+            } else if s == "fullValue" {
+                Transform {
+                    event: EventTransform::ValueFull,
+                    time_binning: TimeBinningTransform::None,
+                }
+            } else if s == "timeWeightedScalar" {
+                Transform {
+                    event: EventTransform::MinMaxAvgDev,
+                    time_binning: TimeBinningTransform::TimeWeighted(BinnedRange::covering_range(
+                        NanoRange {
+                            beg: 20000000000,
+                            end: 30000000000,
+                        },
+                        20,
+                    )?),
+                }
+            } else if s == "unweightedScalar" {
+                Transform {
+                    event: EventTransform::EventBlobsVerbatim,
+                    time_binning: TimeBinningTransform::None,
+                }
+            } else if s == "binnedX" {
+                let _u: usize = pairs.get("binnedXcount").map_or("1", |k| k).parse()?;
+                warn!("TODO binnedXcount");
+                Transform {
+                    event: EventTransform::MinMaxAvgDev,
+                    time_binning: TimeBinningTransform::None,
+                }
+            } else if s == "pulseIdDiff" {
+                Transform {
+                    event: EventTransform::PulseIdDiff,
+                    time_binning: TimeBinningTransform::None,
+                }
+            } else {
+                return Err(Error::with_msg("can not extract binningScheme"));
+            };
+            Ok(ret)
+        } else {
+            // TODO add option to pick from array.
+            let _pick = pairs
                 .get(&format!("{}ArrayPick", upre))
                 .map(|x| match x.parse::<usize>() {
                     Ok(n) => Some(n),
                     Err(_) => None,
                 })
-                .unwrap_or(None),
-        };
-        Ok(ret)
+                .unwrap_or(None);
+            let ret = Transform {
+                event: EventTransform::EventBlobsVerbatim,
+                time_binning: TimeBinningTransform::None,
+            };
+            Ok(ret)
+        }
     }
 }
 
 impl AppendToUrl for Transform {
-    fn append_to_url(&self, url: &mut url::Url) {
+    fn append_to_url(&self, url: &mut Url) {
+        warn!("TODO AppendToUrl for Transform");
         let upre = Self::url_prefix();
         let mut g = url.query_pairs_mut();
-        if let Some(x) = &self.array_pick {
+        if let Some(x) = &Some(123) {
             g.append_pair(&format!("{}ArrayPick", upre), &format!("{}", x));
         }
     }
diff --git a/nodenet/src/conn.rs b/nodenet/src/conn.rs
index ea8b05e..487cb0a 100644
--- a/nodenet/src/conn.rs
+++ b/nodenet/src/conn.rs
@@ -108,6 +108,11 @@ async fn make_channel_events_stream(
         let scalar_type = f.scalar_type;
         let shape = f.shape;
         let do_test_stream_error = false;
+        let with_values = if let AggKind::PulseIdDiff = evq.agg_kind_value() {
+            false
+        } else {
+            true
+        };
         debug!("Make EventsStreamScylla for {series} {scalar_type:?} {shape:?}");
         let stream = scyllaconn::events::EventsStreamScylla::new(
             series,
@@ -115,6 +120,7 @@ async fn make_channel_events_stream(
             do_one_before_range,
             scalar_type,
             shape,
+            with_values,
             scy,
             do_test_stream_error,
         );
diff --git a/scyllaconn/src/bincache.rs b/scyllaconn/src/bincache.rs
index 5d00c32..248d995 100644
--- a/scyllaconn/src/bincache.rs
+++ b/scyllaconn/src/bincache.rs
@@ -391,6 +391,7 @@ pub async fn fetch_uncached_binned_events(
         do_one_before_range,
         chn.scalar_type.clone(),
         chn.shape.clone(),
+        true,
         scy,
         false,
     );
diff --git a/scyllaconn/src/errconv.rs b/scyllaconn/src/errconv.rs
index 887f554..9841060 100644
--- a/scyllaconn/src/errconv.rs
+++ b/scyllaconn/src/errconv.rs
@@ -1,6 +1,8 @@
 use err::Error;
 use scylla::frame::response::cql_to_rust::FromRowError as ScyFromRowError;
-use scylla::transport::errors::{NewSessionError as ScyNewSessionError, QueryError as ScyQueryError};
+use scylla::transport::errors::NewSessionError as ScyNewSessionError;
+use scylla::transport::errors::QueryError as ScyQueryError;
+use scylla::transport::query_result::RowsExpectedError;
 
 pub trait ErrConv<T> {
     fn err_conv(self) -> Result<T, Error>;
@@ -49,3 +51,12 @@ impl<T> ErrConv<T> for Result<T, ScyFromRowError> {
         }
     }
 }
+
+impl<T> ErrConv<T> for Result<T, RowsExpectedError> {
+    fn err_conv(self) -> Result<T, Error> {
+        match self {
+            Ok(k) => Ok(k),
+            Err(e) => Err(Error::with_msg_no_trace(format!("{e:?}"))),
+        }
+    }
+}
diff --git a/scyllaconn/src/events.rs b/scyllaconn/src/events.rs
index d33246a..b6a88d5 100644
--- a/scyllaconn/src/events.rs
+++ b/scyllaconn/src/events.rs
@@ -3,6 +3,8 @@ use err::Error;
 use futures_util::Future;
 use futures_util::FutureExt;
 use futures_util::Stream;
+use items_0::scalar_ops::ScalarOps;
+use items_0::Appendable;
 use items_0::Empty;
 use items_0::Events;
 use items_0::WithLen;
@@ -55,260 +57,220 @@ async fn find_ts_msp(
     Ok((ret1, ret2))
 }
 
-macro_rules! read_next_scalar_values {
-    ($fname:ident, $st:ty, $scyty:ty, $table_name:expr) => {
-        async fn $fname<ST, SCYTY>(
-            series: u64,
-            ts_msp: u64,
-            range: NanoRange,
-            fwd: bool,
-            scy: Arc<ScySession>,
-        ) -> Result<EventsDim0<$st>, Error> {
-            type ST = $st;
-            type SCYTY = $scyty;
-            if range.end > i64::MAX as u64 {
-                return Err(Error::with_msg_no_trace(format!("range.end overflows i64")));
+trait ValTy: Sized {
+    type ScaTy: ScalarOps + std::default::Default;
+    type ScyTy: scylla::cql_to_rust::FromCqlVal<scylla::frame::response::result::CqlValue>;
+    type Container: Events + Appendable<Self>;
+    fn from_scyty(inp: Self::ScyTy) -> Self;
+    fn table_name() -> &'static str;
+    fn default() -> Self;
+}
+
+macro_rules! impl_scaty_scalar {
+    ($st:ty, $st_scy:ty, $table_name:expr) => {
+        impl ValTy for $st {
+            type ScaTy = $st;
+            type ScyTy = $st_scy;
+            type Container = EventsDim0<Self::ScaTy>;
+            fn from_scyty(inp: Self::ScyTy) -> Self {
+                inp as Self
+            }
+            fn table_name() -> &'static str {
+                $table_name
+            }
+            fn default() -> Self {
+                <Self as std::default::Default>::default()
             }
-            let ret = if fwd {
-                let ts_lsp_min = if ts_msp < range.beg { range.beg - ts_msp } else { 0 };
-                let ts_lsp_max = if ts_msp < range.end { range.end - ts_msp } else { 0 };
-                trace!(
-                    "FWD  ts_msp {}  ts_lsp_min {}  ts_lsp_max {}  beg {}  end {}  {}",
-                    ts_msp,
-                    ts_lsp_min,
-                    ts_lsp_max,
-                    range.beg,
-                    range.end,
-                    stringify!($table_name)
-                );
-                // TODO use prepared!
-                let cql = concat!(
-                    "select ts_lsp, pulse, value from ",
-                    $table_name,
-                    " where series = ? and ts_msp = ? and ts_lsp >= ? and ts_lsp < ?"
-                );
-                let res = scy
-                    .query(
-                        cql,
-                        (series as i64, ts_msp as i64, ts_lsp_min as i64, ts_lsp_max as i64),
-                    )
-                    .await
-                    .err_conv()?;
-                let mut last_before = None;
-                let mut ret = EventsDim0::<ST>::empty();
-                for row in res.rows_typed_or_empty::<(i64, i64, SCYTY)>() {
-                    let row = row.err_conv()?;
-                    let ts = ts_msp + row.0 as u64;
-                    let pulse = row.1 as u64;
-                    let value = row.2 as ST;
-                    if ts >= range.end {
-                        // TODO count as logic error
-                        error!("ts >= range.end");
-                    } else if ts >= range.beg {
-                        ret.push(ts, pulse, value);
-                    } else {
-                        if last_before.is_none() {
-                            warn!("encounter event before range in forward read {ts}");
-                        }
-                        last_before = Some((ts, pulse, value));
-                    }
-                }
-                ret
-            } else {
-                let ts_lsp_max = if ts_msp < range.beg { range.beg - ts_msp } else { 0 };
-                trace!(
-                    "BCK  ts_msp {}  ts_lsp_max {}  beg {}  end {}  {}",
-                    ts_msp,
-                    ts_lsp_max,
-                    range.beg,
-                    range.end,
-                    stringify!($table_name)
-                );
-                // TODO use prepared!
-                let cql = concat!(
-                    "select ts_lsp, pulse, value from ",
-                    $table_name,
-                    " where series = ? and ts_msp = ? and ts_lsp < ? order by ts_lsp desc limit 1"
-                );
-                let res = scy
-                    .query(cql, (series as i64, ts_msp as i64, ts_lsp_max as i64))
-                    .await
-                    .err_conv()?;
-                let mut seen_before = false;
-                let mut ret = EventsDim0::<ST>::empty();
-                for row in res.rows_typed_or_empty::<(i64, i64, SCYTY)>() {
-                    let row = row.err_conv()?;
-                    let ts = ts_msp + row.0 as u64;
-                    let pulse = row.1 as u64;
-                    let value = row.2 as ST;
-                    if ts >= range.beg {
-                        // TODO count as logic error
-                        error!("ts >= range.beg");
-                    } else if ts < range.beg {
-                        ret.push(ts, pulse, value);
-                    } else {
-                        seen_before = true;
-                    }
-                }
-                let _ = seen_before;
-                if ret.len() > 1 {
-                    error!("multiple events in backwards search {}", ret.len());
-                }
-                ret
-            };
-            trace!("found in total {} events  ts_msp {}", ret.tss.len(), ts_msp);
-            Ok(ret)
         }
     };
 }
 
-macro_rules! read_next_array_values {
-    ($fname:ident, $st:ty, $scyty:ty, $table_name:expr) => {
-        async fn $fname<ST, SCYTY>(
-            series: u64,
-            ts_msp: u64,
-            range: NanoRange,
-            fwd: bool,
-            scy: Arc<ScySession>,
-        ) -> Result<EventsDim1<$st>, Error> {
-            type ST = $st;
-            type SCYTY = $scyty;
-            if range.end > i64::MAX as u64 {
-                return Err(Error::with_msg_no_trace(format!("range.end overflows i64")));
+macro_rules! impl_scaty_array {
+    ($vt:ty, $st:ty, $st_scy:ty, $table_name:expr) => {
+        impl ValTy for $vt {
+            type ScaTy = $st;
+            type ScyTy = $st_scy;
+            type Container = EventsDim1<Self::ScaTy>;
+            fn from_scyty(inp: Self::ScyTy) -> Self {
+                inp.into_iter().map(|x| x as Self::ScaTy).collect()
+            }
+            fn table_name() -> &'static str {
+                $table_name
+            }
+            fn default() -> Self {
+                Vec::new()
             }
-            let ret = if fwd {
-                let ts_lsp_min = if ts_msp < range.beg { range.beg - ts_msp } else { 0 };
-                let ts_lsp_max = if ts_msp < range.end { range.end - ts_msp } else { 0 };
-                trace!(
-                    "FWD  ts_msp {}  ts_lsp_min {}  ts_lsp_max {}  beg {}  end {}  {}",
-                    ts_msp,
-                    ts_lsp_min,
-                    ts_lsp_max,
-                    range.beg,
-                    range.end,
-                    stringify!($table_name)
-                );
-                // TODO use prepared!
-                let cql = concat!(
-                    "select ts_lsp, pulse, value from ",
-                    $table_name,
-                    " where series = ? and ts_msp = ? and ts_lsp >= ? and ts_lsp < ?"
-                );
-                let res = scy
-                    .query(
-                        cql,
-                        (series as i64, ts_msp as i64, ts_lsp_min as i64, ts_lsp_max as i64),
-                    )
-                    .await
-                    .err_conv()?;
-                let mut last_before = None;
-                let mut ret = EventsDim1::<ST>::empty();
-                for row in res.rows_typed_or_empty::<(i64, i64, Vec<SCYTY>)>() {
-                    let row = row.err_conv()?;
-                    let ts = ts_msp + row.0 as u64;
-                    let pulse = row.1 as u64;
-                    let value = row.2.into_iter().map(|x| x as ST).collect();
-                    if ts >= range.end {
-                        // TODO count as logic error
-                        error!("ts >= range.end");
-                    } else if ts >= range.beg {
-                        ret.push(ts, pulse, value);
-                    } else {
-                        if last_before.is_none() {
-                            warn!("encounter event before range in forward read {ts}");
-                        }
-                        last_before = Some((ts, pulse, value));
-                    }
-                }
-                ret
-            } else {
-                let ts_lsp_max = if ts_msp < range.beg { range.beg - ts_msp } else { 0 };
-                trace!(
-                    "BCK  {}  ts_msp {}  ts_lsp_max {}  beg {}  end {}  {}",
-                    stringify!($fname),
-                    ts_msp,
-                    ts_lsp_max,
-                    range.beg,
-                    range.end,
-                    stringify!($table_name)
-                );
-                // TODO use prepared!
-                let cql = concat!(
-                    "select ts_lsp, pulse, value from ",
-                    $table_name,
-                    " where series = ? and ts_msp = ? and ts_lsp < ? order by ts_lsp desc limit 1"
-                );
-                let res = scy
-                    .query(cql, (series as i64, ts_msp as i64, ts_lsp_max as i64))
-                    .await
-                    .err_conv()?;
-                let mut seen_before = false;
-                let mut ret = EventsDim1::<ST>::empty();
-                for row in res.rows_typed_or_empty::<(i64, i64, Vec<SCYTY>)>() {
-                    let row = row.err_conv()?;
-                    let ts = ts_msp + row.0 as u64;
-                    let pulse = row.1 as u64;
-                    let value = row.2.into_iter().map(|x| x as ST).collect();
-                    if ts >= range.beg {
-                        // TODO count as logic error
-                        error!("ts >= range.beg");
-                    } else if ts < range.beg {
-                        ret.push(ts, pulse, value);
-                    } else {
-                        seen_before = true;
-                    }
-                }
-                let _ = seen_before;
-                if ret.len() > 1 {
-                    error!("multiple events in backwards search {}", ret.len());
-                }
-                ret
-            };
-            trace!("found in total {} events  ts_msp {}", ret.tss.len(), ts_msp);
-            Ok(ret)
         }
     };
 }
 
-read_next_scalar_values!(read_next_values_scalar_u8, u8, i8, "events_scalar_u8");
-read_next_scalar_values!(read_next_values_scalar_u16, u16, i16, "events_scalar_u16");
-read_next_scalar_values!(read_next_values_scalar_u32, u32, i32, "events_scalar_u32");
-read_next_scalar_values!(read_next_values_scalar_u64, u64, i64, "events_scalar_u64");
-read_next_scalar_values!(read_next_values_scalar_i8, i8, i8, "events_scalar_i8");
-read_next_scalar_values!(read_next_values_scalar_i16, i16, i16, "events_scalar_i16");
-read_next_scalar_values!(read_next_values_scalar_i32, i32, i32, "events_scalar_i32");
-read_next_scalar_values!(read_next_values_scalar_i64, i64, i64, "events_scalar_i64");
-read_next_scalar_values!(read_next_values_scalar_f32, f32, f32, "events_scalar_f32");
-read_next_scalar_values!(read_next_values_scalar_f64, f64, f64, "events_scalar_f64");
-read_next_scalar_values!(read_next_values_scalar_bool, bool, bool, "events_scalar_bool");
+impl_scaty_scalar!(u8, i8, "events_scalar_u8");
+impl_scaty_scalar!(u16, i16, "events_scalar_u16");
+impl_scaty_scalar!(u32, i32, "events_scalar_u32");
+impl_scaty_scalar!(u64, i64, "events_scalar_u64");
+impl_scaty_scalar!(i8, i8, "events_scalar_i8");
+impl_scaty_scalar!(i16, i16, "events_scalar_i16");
+impl_scaty_scalar!(i32, i32, "events_scalar_i32");
+impl_scaty_scalar!(i64, i64, "events_scalar_i64");
+impl_scaty_scalar!(f32, f32, "events_scalar_f32");
+impl_scaty_scalar!(f64, f64, "events_scalar_f64");
+impl_scaty_scalar!(bool, bool, "events_scalar_bool");
 
-read_next_array_values!(read_next_values_array_u8, u8, i8, "events_array_u8");
-read_next_array_values!(read_next_values_array_u16, u16, i16, "events_array_u16");
-read_next_array_values!(read_next_values_array_u32, u32, i32, "events_array_u32");
-read_next_array_values!(read_next_values_array_u64, u64, i64, "events_array_u64");
-read_next_array_values!(read_next_values_array_i8, i8, i8, "events_array_i8");
-read_next_array_values!(read_next_values_array_i16, i16, i16, "events_array_i16");
-read_next_array_values!(read_next_values_array_i32, i32, i32, "events_array_i32");
-read_next_array_values!(read_next_values_array_i64, i64, i64, "events_array_i64");
-read_next_array_values!(read_next_values_array_f32, f32, f32, "events_array_f32");
-read_next_array_values!(read_next_values_array_f64, f64, f64, "events_array_f64");
-read_next_array_values!(read_next_values_array_bool, bool, bool, "events_array_bool");
+impl_scaty_array!(Vec<u8>, u8, Vec<i8>, "events_array_u8");
+impl_scaty_array!(Vec<u16>, u16, Vec<i16>, "events_array_u16");
+impl_scaty_array!(Vec<u32>, u32, Vec<i32>, "events_array_u32");
+impl_scaty_array!(Vec<u64>, u64, Vec<i64>, "events_array_u64");
+impl_scaty_array!(Vec<i8>, i8, Vec<i8>, "events_array_i8");
+impl_scaty_array!(Vec<i16>, i16, Vec<i16>, "events_array_i16");
+impl_scaty_array!(Vec<i32>, i32, Vec<i32>, "events_array_i32");
+impl_scaty_array!(Vec<i64>, i64, Vec<i64>, "events_array_i64");
+impl_scaty_array!(Vec<f32>, f32, Vec<f32>, "events_array_f32");
+impl_scaty_array!(Vec<f64>, f64, Vec<f64>, "events_array_f64");
+impl_scaty_array!(Vec<bool>, bool, Vec<bool>, "events_array_bool");
 
-macro_rules! read_values {
-    ($fname:ident, $st:ty, $scyty:ty, $self:expr, $ts_msp:expr) => {{
-        let fut = $fname::<$st, $scyty>($self.series, $ts_msp, $self.range.clone(), $self.fwd, $self.scy.clone());
-        let fut = fut.map(|x| match x {
-            Ok(k) => {
-                let self_name = std::any::type_name::<Self>();
-                trace!("{self_name} read values len {}", k.len());
-                let b = Box::new(k) as Box<dyn Events>;
-                Ok(b)
+struct ReadNextValuesOpts {
+    series: u64,
+    ts_msp: u64,
+    range: NanoRange,
+    fwd: bool,
+    with_values: bool,
+    scy: Arc<ScySession>,
+}
+
+async fn read_next_values<ST>(opts: ReadNextValuesOpts) -> Result<Box<dyn Events>, Error>
+where
+    ST: ValTy,
+{
+    let series = opts.series;
+    let ts_msp = opts.ts_msp;
+    let range = opts.range;
+    let fwd = opts.fwd;
+    let scy = opts.scy;
+    let table_name = ST::table_name();
+    if range.end > i64::MAX as u64 {
+        return Err(Error::with_msg_no_trace(format!("range.end overflows i64")));
+    }
+    let cql_fields = if opts.with_values {
+        "ts_lsp, pulse, value"
+    } else {
+        "ts_lsp, pulse"
+    };
+    let ret = if fwd {
+        let ts_lsp_min = if ts_msp < range.beg { range.beg - ts_msp } else { 0 };
+        let ts_lsp_max = if ts_msp < range.end { range.end - ts_msp } else { 0 };
+        trace!(
+            "FWD  ts_msp {}  ts_lsp_min {}  ts_lsp_max {}  beg {}  end {}  {}",
+            ts_msp,
+            ts_lsp_min,
+            ts_lsp_max,
+            range.beg,
+            range.end,
+            table_name,
+        );
+        // TODO use prepared!
+        let cql = format!(
+            concat!(
+                "select {} from {}",
+                " where series = ? and ts_msp = ? and ts_lsp >= ? and ts_lsp < ?"
+            ),
+            cql_fields, table_name,
+        );
+        let res = scy
+            .query(
+                cql,
+                (series as i64, ts_msp as i64, ts_lsp_min as i64, ts_lsp_max as i64),
+            )
+            .await
+            .err_conv()?;
+        let mut last_before = None;
+        let mut ret = ST::Container::empty();
+        for row in res.rows().err_conv()? {
+            let (ts, pulse, value) = if opts.with_values {
+                let row: (i64, i64, ST::ScyTy) = row.into_typed().err_conv()?;
+                let ts = ts_msp + row.0 as u64;
+                let pulse = row.1 as u64;
+                let value = ValTy::from_scyty(row.2);
+                (ts, pulse, value)
+            } else {
+                let row: (i64, i64) = row.into_typed().err_conv()?;
+                let ts = ts_msp + row.0 as u64;
+                let pulse = row.1 as u64;
+                let value = ValTy::default();
+                (ts, pulse, value)
+            };
+            if ts >= range.end {
+                // TODO count as logic error
+                error!("ts >= range.end");
+            } else if ts >= range.beg {
+                if pulse % 27 != 3618 {
+                    ret.push(ts, pulse, value);
+                }
+            } else {
+                if last_before.is_none() {
+                    warn!("encounter event before range in forward read {ts}");
+                }
+                last_before = Some((ts, pulse, value));
             }
-            Err(e) => Err(e),
-        });
-        let fut = Box::pin(fut) as Pin<Box<dyn Future<Output = Result<Box<dyn Events>, Error>> + Send>>;
-        fut
-    }};
+        }
+        ret
+    } else {
+        let ts_lsp_max = if ts_msp < range.beg { range.beg - ts_msp } else { 0 };
+        trace!(
+            "BCK  ts_msp {}  ts_lsp_max {}  beg {}  end {}  {}",
+            ts_msp,
+            ts_lsp_max,
+            range.beg,
+            range.end,
+            table_name,
+        );
+        // TODO use prepared!
+        let cql = format!(
+            concat!(
+                "select {} from {}",
+                " where series = ? and ts_msp = ? and ts_lsp < ? order by ts_lsp desc limit 1"
+            ),
+            cql_fields, table_name,
+        );
+        let res = scy
+            .query(cql, (series as i64, ts_msp as i64, ts_lsp_max as i64))
+            .await
+            .err_conv()?;
+        let mut seen_before = false;
+        let mut ret = ST::Container::empty();
+        for row in res.rows().err_conv()? {
+            let (ts, pulse, value) = if opts.with_values {
+                let row: (i64, i64, ST::ScyTy) = row.into_typed().err_conv()?;
+                let ts = ts_msp + row.0 as u64;
+                let pulse = row.1 as u64;
+                let value = ValTy::from_scyty(row.2);
+                (ts, pulse, value)
+            } else {
+                let row: (i64, i64) = row.into_typed().err_conv()?;
+                let ts = ts_msp + row.0 as u64;
+                let pulse = row.1 as u64;
+                let value = ValTy::default();
+                (ts, pulse, value)
+            };
+            if ts >= range.beg {
+                // TODO count as logic error
+                error!("ts >= range.beg");
+            } else if ts < range.beg {
+                if pulse % 27 != 3618 {
+                    ret.push(ts, pulse, value);
+                }
+            } else {
+                seen_before = true;
+            }
+        }
+        let _ = seen_before;
+        if ret.len() > 1 {
+            error!("multiple events in backwards search {}", ret.len());
+        }
+        ret
+    };
+    trace!("read  ts_msp {}  len {}", ts_msp, ret.len());
+    let ret = Box::new(ret);
+    Ok(ret)
 }
 
 struct ReadValues {
@@ -318,6 +280,7 @@ struct ReadValues {
     range: NanoRange,
     ts_msps: VecDeque<u64>,
     fwd: bool,
+    with_values: bool,
     fut: Pin<Box<dyn Future<Output = Result<Box<dyn Events>, Error>> + Send>>,
     fut_done: bool,
     scy: Arc<ScySession>,
@@ -331,6 +294,7 @@ impl ReadValues {
         range: NanoRange,
         ts_msps: VecDeque<u64>,
         fwd: bool,
+        with_values: bool,
         scy: Arc<ScySession>,
     ) -> Self {
         let mut ret = Self {
@@ -340,6 +304,7 @@ impl ReadValues {
             range,
             ts_msps,
             fwd,
+            with_values,
             fut: Box::pin(futures_util::future::ready(Err(Error::with_msg_no_trace(
                 "future not initialized",
             )))),
@@ -361,92 +326,59 @@ impl ReadValues {
     }
 
     fn make_fut(&mut self, ts_msp: u64) -> Pin<Box<dyn Future<Output = Result<Box<dyn Events>, Error>> + Send>> {
-        let fut = match &self.shape {
-            Shape::Scalar => match &self.scalar_type {
-                ScalarType::U8 => {
-                    read_values!(read_next_values_scalar_u8, u8, i8, self, ts_msp)
-                }
-                ScalarType::U16 => {
-                    read_values!(read_next_values_scalar_u16, u16, i16, self, ts_msp)
-                }
-                ScalarType::U32 => {
-                    read_values!(read_next_values_scalar_u32, u32, i32, self, ts_msp)
-                }
-                ScalarType::U64 => {
-                    read_values!(read_next_values_scalar_u64, u64, i64, self, ts_msp)
-                }
-                ScalarType::I8 => {
-                    read_values!(read_next_values_scalar_i8, i8, i8, self, ts_msp)
-                }
-                ScalarType::I16 => {
-                    read_values!(read_next_values_scalar_i16, i16, i16, self, ts_msp)
-                }
-                ScalarType::I32 => {
-                    read_values!(read_next_values_scalar_i32, i32, i32, self, ts_msp)
-                }
-                ScalarType::I64 => {
-                    read_values!(read_next_values_scalar_i64, i64, i64, self, ts_msp)
-                }
-                ScalarType::F32 => {
-                    read_values!(read_next_values_scalar_f32, f32, f32, self, ts_msp)
-                }
-                ScalarType::F64 => {
-                    read_values!(read_next_values_scalar_f64, f64, f64, self, ts_msp)
-                }
-                ScalarType::BOOL => {
-                    read_values!(read_next_values_scalar_bool, bool, bool, self, ts_msp)
-                }
+        let opts = ReadNextValuesOpts {
+            series: self.series.clone(),
+            ts_msp,
+            range: self.range.clone(),
+            fwd: self.fwd,
+            with_values: self.with_values,
+            scy: self.scy.clone(),
+        };
+        let scalar_type = self.scalar_type.clone();
+        let shape = self.shape.clone();
+        let fut = async move {
+            match &shape {
+                Shape::Scalar => match &scalar_type {
+                    ScalarType::U8 => read_next_values::<u8>(opts).await,
+                    ScalarType::U16 => read_next_values::<u16>(opts).await,
+                    ScalarType::U32 => read_next_values::<u32>(opts).await,
+                    ScalarType::U64 => read_next_values::<u64>(opts).await,
+                    ScalarType::I8 => read_next_values::<i8>(opts).await,
+                    ScalarType::I16 => read_next_values::<i16>(opts).await,
+                    ScalarType::I32 => read_next_values::<i32>(opts).await,
+                    ScalarType::I64 => read_next_values::<i64>(opts).await,
+                    ScalarType::F32 => read_next_values::<f32>(opts).await,
+                    ScalarType::F64 => read_next_values::<f64>(opts).await,
+                    ScalarType::BOOL => read_next_values::<bool>(opts).await,
+                    _ => {
+                        error!("TODO ReadValues add more types");
+                        err::todoval()
+                    }
+                },
+                Shape::Wave(_) => match &scalar_type {
+                    ScalarType::U8 => read_next_values::<Vec<u8>>(opts).await,
+                    ScalarType::U16 => read_next_values::<Vec<u16>>(opts).await,
+                    ScalarType::U32 => read_next_values::<Vec<u32>>(opts).await,
+                    ScalarType::U64 => read_next_values::<Vec<u64>>(opts).await,
+                    ScalarType::I8 => read_next_values::<Vec<i8>>(opts).await,
+                    ScalarType::I16 => read_next_values::<Vec<i16>>(opts).await,
+                    ScalarType::I32 => read_next_values::<Vec<i32>>(opts).await,
+                    ScalarType::I64 => read_next_values::<Vec<i64>>(opts).await,
+                    ScalarType::F32 => read_next_values::<Vec<f32>>(opts).await,
+                    ScalarType::F64 => read_next_values::<Vec<f64>>(opts).await,
+                    ScalarType::BOOL => read_next_values::<Vec<bool>>(opts).await,
+                    _ => {
+                        error!("TODO ReadValues add more types");
+                        err::todoval()
+                    }
+                },
                 _ => {
                     error!("TODO ReadValues add more types");
                     err::todoval()
                 }
-            },
-            Shape::Wave(_) => match &self.scalar_type {
-                ScalarType::U8 => {
-                    read_values!(read_next_values_array_u8, u8, i8, self, ts_msp)
-                }
-                ScalarType::U16 => {
-                    read_values!(read_next_values_array_u16, u16, i16, self, ts_msp)
-                }
-                ScalarType::U32 => {
-                    read_values!(read_next_values_array_u32, u32, i32, self, ts_msp)
-                }
-                ScalarType::U64 => {
-                    read_values!(read_next_values_array_u64, u64, i64, self, ts_msp)
-                }
-                ScalarType::I8 => {
-                    read_values!(read_next_values_array_i8, i8, i8, self, ts_msp)
-                }
-                ScalarType::I16 => {
-                    read_values!(read_next_values_array_i16, i16, i16, self, ts_msp)
-                }
-                ScalarType::I32 => {
-                    read_values!(read_next_values_array_i32, i32, i32, self, ts_msp)
-                }
-                ScalarType::I64 => {
-                    read_values!(read_next_values_array_i64, i64, i64, self, ts_msp)
-                }
-                ScalarType::F32 => {
-                    read_values!(read_next_values_array_f32, f32, f32, self, ts_msp)
-                }
-                ScalarType::F64 => {
-                    read_values!(read_next_values_array_f64, f64, f64, self, ts_msp)
-                }
-                ScalarType::BOOL => {
-                    info!("attempt to read bool");
-                    read_values!(read_next_values_array_bool, bool, bool, self, ts_msp)
-                }
-                _ => {
-                    error!("TODO ReadValues add more types");
-                    err::todoval()
-                }
-            },
-            _ => {
-                error!("TODO ReadValues add more types");
-                err::todoval()
             }
         };
-        fut
+        Box::pin(fut)
     }
 }
 
@@ -472,6 +404,7 @@ pub struct EventsStreamScylla {
     scy: Arc<ScySession>,
     do_test_stream_error: bool,
     found_one_after: bool,
+    with_values: bool,
     outqueue: VecDeque<Box<dyn Events>>,
 }
 
@@ -482,6 +415,7 @@ impl EventsStreamScylla {
         do_one_before_range: bool,
         scalar_type: ScalarType,
         shape: Shape,
+        with_values: bool,
         scy: Arc<ScySession>,
         do_test_stream_error: bool,
     ) -> Self {
@@ -497,6 +431,7 @@ impl EventsStreamScylla {
             scy,
             do_test_stream_error,
             found_one_after: false,
+            with_values,
             outqueue: VecDeque::new(),
         }
     }
@@ -524,6 +459,7 @@ impl EventsStreamScylla {
                 self.range.clone(),
                 [msp].into(),
                 false,
+                self.with_values,
                 self.scy.clone(),
             );
             self.state = FrState::ReadBack1(st);
@@ -536,6 +472,7 @@ impl EventsStreamScylla {
                 self.range.clone(),
                 mem::replace(&mut self.ts_msp_fwd, VecDeque::new()),
                 true,
+                self.with_values,
                 self.scy.clone(),
             );
             self.state = FrState::ReadValues(st);
@@ -556,6 +493,7 @@ impl EventsStreamScylla {
                     self.range.clone(),
                     mem::replace(&mut self.ts_msp_fwd, VecDeque::new()),
                     true,
+                    self.with_values,
                     self.scy.clone(),
                 );
                 self.state = FrState::ReadValues(st);
@@ -572,6 +510,7 @@ impl EventsStreamScylla {
                     self.range.clone(),
                     [msp].into(),
                     false,
+                    self.with_values,
                     self.scy.clone(),
                 );
                 self.state = FrState::ReadBack2(st);
@@ -584,6 +523,7 @@ impl EventsStreamScylla {
                     self.range.clone(),
                     mem::replace(&mut self.ts_msp_fwd, VecDeque::new()),
                     true,
+                    self.with_values,
                     self.scy.clone(),
                 );
                 self.state = FrState::ReadValues(st);
@@ -607,6 +547,7 @@ impl EventsStreamScylla {
                 self.range.clone(),
                 mem::replace(&mut self.ts_msp_fwd, VecDeque::new()),
                 true,
+                self.with_values,
                 self.scy.clone(),
             );
             self.state = FrState::ReadValues(st);