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fix Planner don't generate SubqueryAlias and generate duplicated SubqueryAlias #4484

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Merged
alamb merged 1 commit into from
Dec 8, 2022
Merged

fix Planner don't generate SubqueryAlias and generate duplicated SubqueryAlias #4484

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23 changes: 11 additions & 12 deletions benchmarks/expected-plans/q13.txt
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Original file line number Diff line number Diff line change
@@ -1,12 +1,11 @@
Sort: custdist DESC NULLS FIRST, c_orders.c_count DESC NULLS FIRST
Projection: c_orders.c_count, COUNT(UInt8(1)) AS custdist
Aggregate: groupBy=[[c_orders.c_count]], aggr=[[COUNT(UInt8(1))]]
SubqueryAlias: c_orders
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@jackwener jackwener Dec 2, 2022 •
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below already existed SubqueryAlias: c_orders

Projection: c_orders.COUNT(orders.o_orderkey) AS c_count
SubqueryAlias: c_orders
Projection: COUNT(orders.o_orderkey)
Aggregate: groupBy=[[customer.c_custkey]], aggr=[[COUNT(orders.o_orderkey)]]
Left Join: customer.c_custkey = orders.o_custkey
TableScan: customer projection=[c_custkey]
Filter: orders.o_comment NOT LIKE Utf8("%special%requests%")
TableScan: orders projection=[o_orderkey, o_custkey, o_comment]
Sort: custdist DESC NULLS FIRST, c_count DESC NULLS FIRST
Projection: c_count, COUNT(UInt8(1)) AS custdist
Aggregate: groupBy=[[c_count]], aggr=[[COUNT(UInt8(1))]]
Projection: c_orders.COUNT(orders.o_orderkey) AS c_count
SubqueryAlias: c_orders
Projection: COUNT(orders.o_orderkey)
Aggregate: groupBy=[[customer.c_custkey]], aggr=[[COUNT(orders.o_orderkey)]]
Left Join: customer.c_custkey = orders.o_custkey
TableScan: customer projection=[c_custkey]
Filter: orders.o_comment NOT LIKE Utf8("%special%requests%")
TableScan: orders projection=[o_orderkey, o_custkey, o_comment]
3 changes: 1 addition & 2 deletions datafusion/core/tests/sql/explain_analyze.rs
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Expand Up @@ -884,8 +884,7 @@ async fn explain_logical_plan_only() {
"Projection: COUNT(UInt8(1))\
\n Aggregate: groupBy=[[]], aggr=[[COUNT(UInt8(1))]]\
\n SubqueryAlias: t\
\n SubqueryAlias: t\
\n Values: (Utf8(\"a\"), Int64(1), Int64(100)), (Utf8(\"a\"), Int64(2), Int64(150))",
\n Values: (Utf8(\"a\"), Int64(1), Int64(100)), (Utf8(\"a\"), Int64(2), Int64(150))",
]];
assert_eq!(expected, actual);
}
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2 changes: 2 additions & 0 deletions datafusion/core/tests/sql/joins.rs
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Expand Up @@ -998,6 +998,8 @@ async fn inner_join_qualified_names() -> Result<()> {
}

#[tokio::test]
#[ignore]
/// TODO: need to repair. Wrong Test: ambiguous column name: a
async fn nestedjoin_with_alias() -> Result<()> {
// repro case for https://github.com/apache/arrow-datafusion/issues/2867
let sql = "select * from ((select 1 as a, 2 as b) c INNER JOIN (select 1 as a, 3 as d) e on c.a = e.a) f;";
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38 changes: 20 additions & 18 deletions datafusion/core/tests/sql/window.rs
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Expand Up @@ -339,15 +339,16 @@ async fn window_expr_eliminate() -> Result<()> {
" SubqueryAlias: _data2 [a:Int64, b:Utf8]",
" Projection: s.a, s.b [a:Int64, b:Utf8]",
" SubqueryAlias: s [a:Int64, b:Utf8]",
" Union [a:Int64, b:Utf8]",
" Projection: Int64(1) AS a, Utf8(\"aa\") AS b [a:Int64, b:Utf8]",
" EmptyRelation []",
" Projection: Int64(3) AS a, Utf8(\"aa\") AS b [a:Int64, b:Utf8]",
" EmptyRelation []",
" Projection: Int64(5) AS a, Utf8(\"bb\") AS b [a:Int64, b:Utf8]",
" EmptyRelation []",
" Projection: Int64(7) AS a, Utf8(\"bb\") AS b [a:Int64, b:Utf8]",
" EmptyRelation []",
" SubqueryAlias: _sample_data [a:Int64, b:Utf8]",
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@jackwener jackwener Dec 2, 2022

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Missing SubqueryAlias

" Union [a:Int64, b:Utf8]",
" Projection: Int64(1) AS a, Utf8(\"aa\") AS b [a:Int64, b:Utf8]",
" EmptyRelation []",
" Projection: Int64(3) AS a, Utf8(\"aa\") AS b [a:Int64, b:Utf8]",
" EmptyRelation []",
" Projection: Int64(5) AS a, Utf8(\"bb\") AS b [a:Int64, b:Utf8]",
" EmptyRelation []",
" Projection: Int64(7) AS a, Utf8(\"bb\") AS b [a:Int64, b:Utf8]",
" EmptyRelation []",
];
let formatted = plan.display_indent_schema().to_string();
let actual: Vec<&str> = formatted.trim().lines().collect();
Expand Down Expand Up @@ -404,15 +405,16 @@ async fn window_expr_eliminate() -> Result<()> {
" Projection: ROW_NUMBER() PARTITION BY [s.b] ORDER BY [s.a ASC NULLS LAST] RANGE BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW AS seq, s.a, s.b [seq:UInt64;N, a:Int64, b:Utf8]",
" WindowAggr: windowExpr=[[ROW_NUMBER() PARTITION BY [s.b] ORDER BY [s.a ASC NULLS LAST] RANGE BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW]] [ROW_NUMBER() PARTITION BY [s.b] ORDER BY [s.a ASC NULLS LAST] RANGE BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW:UInt64;N, a:Int64, b:Utf8]",
" SubqueryAlias: s [a:Int64, b:Utf8]",
" Union [a:Int64, b:Utf8]",
" Projection: Int64(1) AS a, Utf8(\"aa\") AS b [a:Int64, b:Utf8]",
" EmptyRelation []",
" Projection: Int64(3) AS a, Utf8(\"aa\") AS b [a:Int64, b:Utf8]",
" EmptyRelation []",
" Projection: Int64(5) AS a, Utf8(\"bb\") AS b [a:Int64, b:Utf8]",
" EmptyRelation []",
" Projection: Int64(7) AS a, Utf8(\"bb\") AS b [a:Int64, b:Utf8]",
" EmptyRelation []",
" SubqueryAlias: _sample_data [a:Int64, b:Utf8]",
" Union [a:Int64, b:Utf8]",
" Projection: Int64(1) AS a, Utf8(\"aa\") AS b [a:Int64, b:Utf8]",
" EmptyRelation []",
" Projection: Int64(3) AS a, Utf8(\"aa\") AS b [a:Int64, b:Utf8]",
" EmptyRelation []",
" Projection: Int64(5) AS a, Utf8(\"bb\") AS b [a:Int64, b:Utf8]",
" EmptyRelation []",
" Projection: Int64(7) AS a, Utf8(\"bb\") AS b [a:Int64, b:Utf8]",
" EmptyRelation []",
];
let formatted = plan.display_indent_schema().to_string();
let actual: Vec<&str> = formatted.trim().lines().collect();
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15 changes: 4 additions & 11 deletions datafusion/expr/src/logical_plan/builder.rs
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Expand Up @@ -966,17 +966,10 @@ pub fn project(

/// Create a SubqueryAlias to wrap a LogicalPlan.
pub fn subquery_alias(plan: &LogicalPlan, alias: &str) -> Result<LogicalPlan> {
subquery_alias_owned(plan.clone(), alias)
}

pub fn subquery_alias_owned(plan: LogicalPlan, alias: &str) -> Result<LogicalPlan> {
let schema: Schema = plan.schema().as_ref().clone().into();
let schema = DFSchemaRef::new(DFSchema::try_from_qualified_schema(alias, &schema)?);
Ok(LogicalPlan::SubqueryAlias(SubqueryAlias {
input: Arc::new(plan),
alias: alias.to_string(),
schema,
}))
Ok(LogicalPlan::SubqueryAlias(SubqueryAlias::try_new(
plan.clone(),
alias,
)?))
}

/// Create a LogicalPlanBuilder representing a scan of a table with the provided name and schema.
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13 changes: 13 additions & 0 deletions datafusion/expr/src/logical_plan/plan.rs
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Expand Up @@ -1184,6 +1184,19 @@ pub struct SubqueryAlias {
pub schema: DFSchemaRef,
}

impl SubqueryAlias {
pub fn try_new(plan: LogicalPlan, alias: &str) -> datafusion_common::Result<Self> {
let schema: Schema = plan.schema().as_ref().clone().into();
let schema =
DFSchemaRef::new(DFSchema::try_from_qualified_schema(alias, &schema)?);
Ok(SubqueryAlias {
input: Arc::new(plan),
alias: alias.to_string(),
schema,
})
}
}

/// Filters rows from its input that do not match an
/// expression (essentially a WHERE clause with a predicate
/// expression).
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6 changes: 4 additions & 2 deletions datafusion/proto/src/logical_plan.rs
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Expand Up @@ -39,7 +39,7 @@ use datafusion::{
prelude::SessionContext,
};
use datafusion_common::{context, Column, DataFusionError, OwnedTableReference};
use datafusion_expr::logical_plan::builder::{project, subquery_alias_owned};
use datafusion_expr::logical_plan::builder::project;
use datafusion_expr::{
logical_plan::{
Aggregate, CreateCatalog, CreateCatalogSchema, CreateExternalTable, CreateView,
Expand Down Expand Up @@ -348,7 +348,9 @@ impl AsLogicalPlan for LogicalPlanNode {
match projection.optional_alias.as_ref() {
Some(a) => match a {
protobuf::projection_node::OptionalAlias::Alias(alias) => {
subquery_alias_owned(new_proj, alias)
Ok(LogicalPlan::SubqueryAlias(SubqueryAlias::try_new(
new_proj, alias,
)?))
}
},
_ => Ok(new_proj),
Expand Down
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