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new 0f0d9be9 Fix issue 1955 - List comprehension in WHERE clause (#2094)
0f0d9be9 is described below
commit 0f0d9be9ba02fb90272d2053986f2b5aa4a0c25c
Author: Muhammad Taha Naveed <[email protected]>
AuthorDate: Mon Sep 9 22:31:26 2024 +0500
Fix issue 1955 - List comprehension in WHERE clause (#2094)
- Fixed issue when MATCH clause variable is referenced inside list
comprehension in WHERE clause or in property constraint.
- Added regression tests.
---
regress/expected/list_comprehension.out | 47 +++++++++++++++++++++++++++++++++
regress/sql/list_comprehension.sql | 8 ++++++
src/backend/parser/cypher_expr.c | 3 ++-
3 files changed, 57 insertions(+), 1 deletion(-)
diff --git a/regress/expected/list_comprehension.out
b/regress/expected/list_comprehension.out
index 0260fa5e..bf5731d2 100644
--- a/regress/expected/list_comprehension.out
+++ b/regress/expected/list_comprehension.out
@@ -617,6 +617,53 @@ SELECT * FROM cypher('list_comprehension', $$ MATCH (u)
WITH *, [i in [1,2,3]] a
[1, 2, 3]
(1 row)
+-- Issue 1955 - variable reference in list comprehension
+SELECT * FROM cypher('list_comprehension', $$ MATCH (u) WHERE u.list=[i IN
u.list] RETURN u $$) AS (result agtype);
+
result
+---------------------------------------------------------------------------------------------------------------------------------------------------------------
+ {"id": 281474976710658, "label": "", "properties": {"list": [1, 3, 5, 7, 9,
11, 13]}}::vertex
+ {"id": 281474976710660, "label": "", "properties": {"list": [12, 14, 16, 18,
20, 22, 24]}}::vertex
+ {"id": 281474976710662, "label": "", "properties": {"list": [25.0, 49.0,
81.0, 121.0, 169.0]}}::vertex
+ {"id": 281474976710657, "label": "", "properties": {"a": [], "b": [0, 1, 2,
3, 4, 5], "c": [0, 2, 4, 6, 8, 10, 12], "list": [0, 2, 4, 6, 8, 10,
12]}}::vertex
+ {"id": 281474976710663, "label": "", "properties": {"list": [1, 2,
3]}}::vertex
+ {"id": 281474976710659, "label": "", "properties": {"list": []}}::vertex
+ {"id": 281474976710661, "label": "", "properties": {"list": [6, 8, 10,
12]}}::vertex
+ {"id": 844424930131969, "label": "csm_match", "properties": {"list": ["abc",
"def", "ghi"]}}::vertex
+(8 rows)
+
+SELECT * FROM cypher('list_comprehension', $$ MATCH (u) WHERE u.list=[i IN
u.list WHERE i>0] RETURN u $$) AS (result agtype);
+ result
+--------------------------------------------------------------------------------------------------------
+ {"id": 281474976710658, "label": "", "properties": {"list": [1, 3, 5, 7, 9,
11, 13]}}::vertex
+ {"id": 281474976710660, "label": "", "properties": {"list": [12, 14, 16, 18,
20, 22, 24]}}::vertex
+ {"id": 281474976710662, "label": "", "properties": {"list": [25.0, 49.0,
81.0, 121.0, 169.0]}}::vertex
+ {"id": 281474976710663, "label": "", "properties": {"list": [1, 2,
3]}}::vertex
+ {"id": 281474976710661, "label": "", "properties": {"list": [6, 8, 10,
12]}}::vertex
+(5 rows)
+
+SELECT * FROM cypher('list_comprehension', $$ MATCH (u) WHERE size([e in
u.list where e starts with "a"])>0 RETURN u $$) AS (result agtype);
+ result
+------------------------------------------------------------------------------------------------------
+ {"id": 844424930131969, "label": "csm_match", "properties": {"list": ["abc",
"def", "ghi"]}}::vertex
+(1 row)
+
+SELECT * FROM cypher('list_comprehension', $$ MATCH (u ={list:[i IN u.list |
i+1]}) RETURN u $$) AS (result agtype);
+ result
+--------------------------------------------------------------------------
+ {"id": 281474976710659, "label": "", "properties": {"list": []}}::vertex
+(1 row)
+
+SELECT * FROM cypher('list_comprehension', $$ MATCH (u ={list:[i IN u.list
WHERE i>0]}) RETURN u$$) AS (result agtype);
+ result
+--------------------------------------------------------------------------------------------------------
+ {"id": 281474976710658, "label": "", "properties": {"list": [1, 3, 5, 7, 9,
11, 13]}}::vertex
+ {"id": 281474976710660, "label": "", "properties": {"list": [12, 14, 16, 18,
20, 22, 24]}}::vertex
+ {"id": 281474976710662, "label": "", "properties": {"list": [25.0, 49.0,
81.0, 121.0, 169.0]}}::vertex
+ {"id": 281474976710663, "label": "", "properties": {"list": [1, 2,
3]}}::vertex
+ {"id": 281474976710661, "label": "", "properties": {"list": [6, 8, 10,
12]}}::vertex
+(5 rows)
+
+-- Clean up
SELECT * FROM drop_graph('list_comprehension', true);
NOTICE: drop cascades to 4 other objects
DETAIL: drop cascades to table list_comprehension._ag_label_vertex
diff --git a/regress/sql/list_comprehension.sql
b/regress/sql/list_comprehension.sql
index cef92a22..cb941a61 100644
--- a/regress/sql/list_comprehension.sql
+++ b/regress/sql/list_comprehension.sql
@@ -157,4 +157,12 @@ SELECT * FROM cypher('list_comprehension', $$ MATCH (u)
WITH * WHERE u.list=[i I
SELECT * FROM cypher('list_comprehension', $$ MATCH (u) WITH * WITH *, [i in
[1,2,3]] as list RETURN list LIMIT 1 $$) AS (result agtype);
SELECT * FROM cypher('list_comprehension', $$ MATCH (u) WITH *, [i in [1,2,3]]
as list WITH * RETURN list LIMIT 1 $$) AS (result agtype);
+-- Issue 1955 - variable reference in list comprehension
+SELECT * FROM cypher('list_comprehension', $$ MATCH (u) WHERE u.list=[i IN
u.list] RETURN u $$) AS (result agtype);
+SELECT * FROM cypher('list_comprehension', $$ MATCH (u) WHERE u.list=[i IN
u.list WHERE i>0] RETURN u $$) AS (result agtype);
+SELECT * FROM cypher('list_comprehension', $$ MATCH (u) WHERE size([e in
u.list where e starts with "a"])>0 RETURN u $$) AS (result agtype);
+SELECT * FROM cypher('list_comprehension', $$ MATCH (u ={list:[i IN u.list |
i+1]}) RETURN u $$) AS (result agtype);
+SELECT * FROM cypher('list_comprehension', $$ MATCH (u ={list:[i IN u.list
WHERE i>0]}) RETURN u$$) AS (result agtype);
+
+-- Clean up
SELECT * FROM drop_graph('list_comprehension', true);
\ No newline at end of file
diff --git a/src/backend/parser/cypher_expr.c b/src/backend/parser/cypher_expr.c
index 654223c9..f1651a01 100644
--- a/src/backend/parser/cypher_expr.c
+++ b/src/backend/parser/cypher_expr.c
@@ -1309,7 +1309,8 @@ static Node
*transform_column_ref_for_indirection(cypher_parsestate *cpstate,
}
/* find the properties column of the NSI and return a var for it */
- node = scanNSItemForColumn(pstate, pnsi, 0, "properties", cr->location);
+ node = scanNSItemForColumn(pstate, pnsi, levels_up, "properties",
+ cr->location);
/*
* Error out if we couldn't find it.
