feat: do not remove time filters in ScanRegion (#5180)

* feat: do not remove time filters

* chore: remove `time_range` from parquet reader

* chore: print more message in the check script

* chore: fix unused error

scripts/check-snafu.py

@@ -58,8 +58,10 @@ def main():
         if not check_snafu_in_files(branch_name, other_rust_files)
     ]
 
-    for name in unused_snafu:
-        print(name)
+    if unused_snafu:
+        print("Unused error variants:")
+        for name in unused_snafu:
+            print(name)
 
     if unused_snafu:
         raise SystemExit(1)

src/mito2/src/error.rs

@@ -756,13 +756,6 @@ pub enum Error {
         location: Location,
     },
 
-    #[snafu(display("Failed to build time range filters for value: {:?}", timestamp))]
-    BuildTimeRangeFilter {
-        timestamp: Timestamp,
-        #[snafu(implicit)]
-        location: Location,
-    },
-
     #[snafu(display("Failed to open region"))]
     OpenRegion {
         #[snafu(implicit)]
@@ -1023,7 +1016,6 @@ impl ErrorExt for Error {
             ChecksumMismatch { .. } => StatusCode::Unexpected,
             RegionStopped { .. } => StatusCode::RegionNotReady,
             TimeRangePredicateOverflow { .. } => StatusCode::InvalidArguments,
-            BuildTimeRangeFilter { .. } => StatusCode::Unexpected,
             UnsupportedOperation { .. } => StatusCode::Unsupported,
             RemoteCompaction { .. } => StatusCode::Unexpected,
 

src/mito2/src/read/scan_region.rs

@@ -355,20 +355,16 @@ impl ScanRegion {
         Ok(input)
     }
 
-    /// Build time range predicate from filters, also remove time filters from request.
-    fn build_time_range_predicate(&mut self) -> TimestampRange {
+    /// Build time range predicate from filters.
+    fn build_time_range_predicate(&self) -> TimestampRange {
         let time_index = self.version.metadata.time_index_column();
         let unit = time_index
             .column_schema
             .data_type
             .as_timestamp()
             .expect("Time index must have timestamp-compatible type")
             .unit();
-        build_time_range_predicate(
-            &time_index.column_schema.name,
-            unit,
-            &mut self.request.filters,
-        )
+        build_time_range_predicate(&time_index.column_schema.name, unit, &self.request.filters)
     }
 
     /// Remove field filters if the merge mode is [MergeMode::LastNonNull].
@@ -695,7 +691,6 @@ impl ScanInput {
             .access_layer
             .read_sst(file.clone())
             .predicate(self.predicate.clone())
-            .time_range(self.time_range)
             .projection(Some(self.mapper.column_ids().to_vec()))
             .cache(self.cache_manager.clone())
             .inverted_index_applier(self.inverted_index_applier.clone())

src/mito2/src/sst/parquet/reader.rs

@@ -23,11 +23,7 @@ use api::v1::SemanticType;
 use async_trait::async_trait;
 use common_recordbatch::filter::SimpleFilterEvaluator;
 use common_telemetry::{debug, warn};
-use common_time::range::TimestampRange;
-use common_time::timestamp::TimeUnit;
-use common_time::Timestamp;
-use datafusion_common::ScalarValue;
-use datafusion_expr::{Expr, Operator};
+use datafusion_expr::Expr;
 use datatypes::arrow::record_batch::RecordBatch;
 use datatypes::data_type::ConcreteDataType;
 use itertools::Itertools;
@@ -42,7 +38,6 @@ use store_api::storage::ColumnId;
 use table::predicate::Predicate;
 
 use crate::cache::CacheManagerRef;
-use crate::error;
 use crate::error::{
     ArrowReaderSnafu, InvalidMetadataSnafu, InvalidParquetSnafu, ReadParquetSnafu, Result,
 };
@@ -74,8 +69,6 @@ pub struct ParquetReaderBuilder {
     object_store: ObjectStore,
     /// Predicate to push down.
     predicate: Option<Predicate>,
-    /// Time range to filter.
-    time_range: Option<TimestampRange>,
     /// Metadata of columns to read.
     ///
     /// `None` reads all columns. Due to schema change, the projection
@@ -104,7 +97,6 @@ impl ParquetReaderBuilder {
             file_handle,
             object_store,
             predicate: None,
-            time_range: None,
             projection: None,
             cache_manager: None,
             inverted_index_applier: None,
@@ -120,13 +112,6 @@ impl ParquetReaderBuilder {
         self
     }
 
-    /// Attaches the time range to the builder.
-    #[must_use]
-    pub fn time_range(mut self, time_range: Option<TimestampRange>) -> ParquetReaderBuilder {
-        self.time_range = time_range;
-        self
-    }
-
     /// Attaches the projection to the builder.
     ///
     /// The reader only applies the projection to fields.
@@ -238,7 +223,7 @@ impl ParquetReaderBuilder {
             cache_manager: self.cache_manager.clone(),
         };
 
-        let mut filters = if let Some(predicate) = &self.predicate {
+        let filters = if let Some(predicate) = &self.predicate {
             predicate
                 .exprs()
                 .iter()
@@ -254,10 +239,6 @@ impl ParquetReaderBuilder {
             vec![]
         };
 
-        if let Some(time_range) = &self.time_range {
-            filters.extend(time_range_to_predicate(*time_range, &region_meta)?);
-        }
-
         let codec = McmpRowCodec::new(
             read_format
                 .metadata()
@@ -678,59 +659,6 @@ impl ParquetReaderBuilder {
     }
 }
 
-/// Transforms time range into [SimpleFilterEvaluator].
-fn time_range_to_predicate(
-    time_range: TimestampRange,
-    metadata: &RegionMetadataRef,
-) -> Result<Vec<SimpleFilterContext>> {
-    let ts_col = metadata.time_index_column();
-    let ts_col_id = ts_col.column_id;
-
-    let ts_to_filter = |op: Operator, timestamp: &Timestamp| {
-        let value = match timestamp.unit() {
-            TimeUnit::Second => ScalarValue::TimestampSecond(Some(timestamp.value()), None),
-            TimeUnit::Millisecond => {
-                ScalarValue::TimestampMillisecond(Some(timestamp.value()), None)
-            }
-            TimeUnit::Microsecond => {
-                ScalarValue::TimestampMicrosecond(Some(timestamp.value()), None)
-            }
-            TimeUnit::Nanosecond => ScalarValue::TimestampNanosecond(Some(timestamp.value()), None),
-        };
-        let evaluator = SimpleFilterEvaluator::new(ts_col.column_schema.name.clone(), value, op)
-            .context(error::BuildTimeRangeFilterSnafu {
-                timestamp: *timestamp,
-            })?;
-        Ok(SimpleFilterContext::new(
-            evaluator,
-            ts_col_id,
-            SemanticType::Timestamp,
-            ts_col.column_schema.data_type.clone(),
-        ))
-    };
-
-    let predicates = match (time_range.start(), time_range.end()) {
-        (Some(start), Some(end)) => {
-            vec![
-                ts_to_filter(Operator::GtEq, start)?,
-                ts_to_filter(Operator::Lt, end)?,
-            ]
-        }
-
-        (Some(start), None) => {
-            vec![ts_to_filter(Operator::GtEq, start)?]
-        }
-
-        (None, Some(end)) => {
-            vec![ts_to_filter(Operator::Lt, end)?]
-        }
-        (None, None) => {
-            vec![]
-        }
-    };
-    Ok(predicates)
-}
-
 /// Metrics of filtering rows groups and rows.
 #[derive(Debug, Default, Clone, Copy)]
 pub(crate) struct ReaderFilterMetrics {
@@ -939,20 +867,6 @@ pub(crate) struct SimpleFilterContext {
 }
 
 impl SimpleFilterContext {
-    fn new(
-        filter: SimpleFilterEvaluator,
-        column_id: ColumnId,
-        semantic_type: SemanticType,
-        data_type: ConcreteDataType,
-    ) -> Self {
-        Self {
-            filter,
-            column_id,
-            semantic_type,
-            data_type,
-        }
-    }
-
     /// Creates a context for the `expr`.
     ///
     /// Returns None if the column to filter doesn't exist in the SST metadata or the

src/query/src/tests/time_range_filter_test.rs

@@ -115,9 +115,9 @@ struct TimeRangeTester {
 impl TimeRangeTester {
     async fn check(&self, sql: &str, expect: TimestampRange) {
         let _ = exec_selection(self.engine.clone(), sql).await;
-        let mut filters = self.take_filters();
+        let filters = self.take_filters();
 
-        let range = build_time_range_predicate("ts", TimeUnit::Millisecond, &mut filters);
+        let range = build_time_range_predicate("ts", TimeUnit::Millisecond, &filters);
         assert_eq!(expect, range);
     }
 

src/table/src/predicate.rs

@@ -135,21 +135,17 @@ impl Predicate {
 // since it requires query engine to convert sql to filters.
 /// `build_time_range_predicate` extracts time range from logical exprs to facilitate fast
 /// time range pruning.
-pub fn build_time_range_predicate<'a>(
-    ts_col_name: &'a str,
+pub fn build_time_range_predicate(
+    ts_col_name: &str,
     ts_col_unit: TimeUnit,
-    filters: &'a mut Vec<Expr>,
+    filters: &[Expr],
 ) -> TimestampRange {
     let mut res = TimestampRange::min_to_max();
-    let mut filters_remain = vec![];
-    for expr in std::mem::take(filters) {
-        if let Some(range) = extract_time_range_from_expr(ts_col_name, ts_col_unit, &expr) {
+    for expr in filters {
+        if let Some(range) = extract_time_range_from_expr(ts_col_name, ts_col_unit, expr) {
             res = res.and(&range);
-        } else {
-            filters_remain.push(expr);
         }
     }
-    *filters = filters_remain;
     res
 }
 
@@ -392,7 +388,7 @@ mod tests {
     fn check_build_predicate(expr: Expr, expect: TimestampRange) {
         assert_eq!(
             expect,
-            build_time_range_predicate("ts", TimeUnit::Millisecond, &mut vec![expr])
+            build_time_range_predicate("ts", TimeUnit::Millisecond, &[expr])
         );
     }