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fix: run logical optimizer rules for TableScan expressions #4614

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Dec 14, 2022
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fix: run logical optimizer rules for TableScan expressions #4614

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2 changes: 1 addition & 1 deletion datafusion/core/tests/sql/subqueries.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -398,7 +398,7 @@ order by cntrycode;"#;
\n Projection: AVG(customer.c_acctbal) AS __value\
\n Aggregate: groupBy=[[]], aggr=[[AVG(customer.c_acctbal)]]\
\n Filter: customer.c_acctbal > Decimal128(Some(0),15,2) AND substr(customer.c_phone, Int64(1), Int64(2)) IN ([Utf8(\"13\"), Utf8(\"31\"), Utf8(\"23\"), Utf8(\"29\"), Utf8(\"30\"), Utf8(\"18\"), Utf8(\"17\")])\
\n TableScan: customer projection=[c_phone, c_acctbal], partial_filters=[CAST(customer.c_acctbal AS Decimal128(30, 15)) > Decimal128(Some(0),30,15), substr(customer.c_phone, Int64(1), Int64(2)) IN ([Utf8(\"13\"), Utf8(\"31\"), Utf8(\"23\"), Utf8(\"29\"), Utf8(\"30\"), Utf8(\"18\"), Utf8(\"17\")]), customer.c_acctbal > Decimal128(Some(0),15,2)]";
\n TableScan: customer projection=[c_phone, c_acctbal], partial_filters=[customer.c_acctbal > Decimal128(Some(0),15,2) AS customer.c_acctbal > Decimal128(Some(0),30,15), substr(customer.c_phone, Int64(1), Int64(2)) IN ([Utf8(\"13\"), Utf8(\"31\"), Utf8(\"23\"), Utf8(\"29\"), Utf8(\"30\"), Utf8(\"18\"), Utf8(\"17\")]), customer.c_acctbal > Decimal128(Some(0),15,2)]";
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👍

assert_eq!(expected, actual);

// assert data
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4 changes: 2 additions & 2 deletions datafusion/expr/src/logical_plan/plan.rs
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Expand Up @@ -262,9 +262,9 @@ impl LogicalPlan {
.collect(),
LogicalPlan::Sort(Sort { expr, .. }) => expr.clone(),
LogicalPlan::Extension(extension) => extension.node.expressions(),
LogicalPlan::TableScan(TableScan { filters, .. }) => filters.clone(),
// plans without expressions
LogicalPlan::TableScan(_)
| LogicalPlan::EmptyRelation(_)
LogicalPlan::EmptyRelation(_)
| LogicalPlan::Subquery(_)
| LogicalPlan::SubqueryAlias(_)
| LogicalPlan::Limit(_)
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10 changes: 8 additions & 2 deletions datafusion/expr/src/utils.rs
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Expand Up @@ -25,7 +25,7 @@ use crate::logical_plan::{
Limit, Partitioning, Prepare, Projection, Repartition, Sort, Subquery, SubqueryAlias,
Union, Values, Window,
};
use crate::{Cast, Expr, ExprSchemable, LogicalPlan, LogicalPlanBuilder};
use crate::{Cast, Expr, ExprSchemable, LogicalPlan, LogicalPlanBuilder, TableScan};
use arrow::datatypes::{DataType, TimeUnit};
use datafusion_common::{
Column, DFField, DFSchema, DFSchemaRef, DataFusionError, Result, ScalarValue,
Expand Down Expand Up @@ -587,8 +587,14 @@ pub fn from_plan(
data_types: data_types.clone(),
input: Arc::new(inputs[0].clone()),
})),
LogicalPlan::TableScan(ts) => {
assert!(inputs.is_empty(), "{:?} should have no inputs", plan);
Ok(LogicalPlan::TableScan(TableScan {
filters: expr.to_vec(),
..ts.clone()
}))
}
LogicalPlan::EmptyRelation(_)
| LogicalPlan::TableScan { .. }
| LogicalPlan::CreateExternalTable(_)
| LogicalPlan::DropTable(_)
| LogicalPlan::DropView(_)
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6 changes: 6 additions & 0 deletions datafusion/optimizer/src/type_coercion.rs
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Expand Up @@ -85,6 +85,12 @@ fn optimize_internal(
},
);

if let LogicalPlan::TableScan(ts) = plan {
let source_schema =
DFSchema::try_from_qualified_schema(&ts.table_name, &ts.source.schema())?;
schema.merge(&source_schema);
}

// merge the outer schema for correlated subqueries
// like case:
// select t2.c2 from t1 where t1.c1 in (select t2.c1 from t2 where t2.c2=t1.c3)
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