1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
|
from __future__ import annotations
import unittest
import sqlglot
from sqlglot.lineage import lineage
from sqlglot.schema import MappingSchema
class TestLineage(unittest.TestCase):
maxDiff = None
@classmethod
def setUpClass(cls):
sqlglot.schema = MappingSchema()
def test_lineage(self) -> None:
node = lineage(
"a",
"SELECT a FROM z",
schema={"x": {"a": "int"}},
sources={"y": "SELECT * FROM x", "z": "SELECT a FROM y"},
)
self.assertEqual(
node.source.sql(),
"SELECT z.a AS a FROM (SELECT y.a AS a FROM (SELECT x.a AS a FROM x AS x) AS y /* source: y */) AS z /* source: z */",
)
self.assertEqual(node.alias, "")
downstream = node.downstream[0]
self.assertEqual(
downstream.source.sql(),
"SELECT y.a AS a FROM (SELECT x.a AS a FROM x AS x) AS y /* source: y */",
)
self.assertEqual(downstream.alias, "z")
downstream = downstream.downstream[0]
self.assertEqual(
downstream.source.sql(),
"SELECT x.a AS a FROM x AS x",
)
self.assertEqual(downstream.alias, "y")
self.assertGreater(len(node.to_html()._repr_html_()), 1000)
def test_lineage_sql_with_cte(self) -> None:
node = lineage(
"a",
"WITH z AS (SELECT a FROM y) SELECT a FROM z",
schema={"x": {"a": "int"}},
sources={"y": "SELECT * FROM x"},
)
self.assertEqual(
node.source.sql(),
"WITH z AS (SELECT y.a AS a FROM (SELECT x.a AS a FROM x AS x) AS y /* source: y */) SELECT z.a AS a FROM z AS z",
)
self.assertEqual(node.alias, "")
# Node containing expanded CTE expression
downstream = node.downstream[0]
self.assertEqual(
downstream.source.sql(),
"SELECT y.a AS a FROM (SELECT x.a AS a FROM x AS x) AS y /* source: y */",
)
self.assertEqual(downstream.alias, "")
downstream = downstream.downstream[0]
self.assertEqual(
downstream.source.sql(),
"SELECT x.a AS a FROM x AS x",
)
self.assertEqual(downstream.alias, "y")
def test_lineage_source_with_cte(self) -> None:
node = lineage(
"a",
"SELECT a FROM z",
schema={"x": {"a": "int"}},
sources={"z": "WITH y AS (SELECT * FROM x) SELECT a FROM y"},
)
self.assertEqual(
node.source.sql(),
"SELECT z.a AS a FROM (WITH y AS (SELECT x.a AS a FROM x AS x) SELECT y.a AS a FROM y AS y) AS z /* source: z */",
)
self.assertEqual(node.alias, "")
downstream = node.downstream[0]
self.assertEqual(
downstream.source.sql(),
"WITH y AS (SELECT x.a AS a FROM x AS x) SELECT y.a AS a FROM y AS y",
)
self.assertEqual(downstream.alias, "z")
downstream = downstream.downstream[0]
self.assertEqual(
downstream.source.sql(),
"SELECT x.a AS a FROM x AS x",
)
self.assertEqual(downstream.alias, "z")
def test_lineage_source_with_star(self) -> None:
node = lineage(
"a",
"WITH y AS (SELECT * FROM x) SELECT a FROM y",
)
self.assertEqual(
node.source.sql(),
"WITH y AS (SELECT * FROM x AS x) SELECT y.a AS a FROM y AS y",
)
self.assertEqual(node.alias, "")
downstream = node.downstream[0]
self.assertEqual(
downstream.source.sql(),
"SELECT * FROM x AS x",
)
self.assertEqual(downstream.alias, "")
def test_lineage_external_col(self) -> None:
node = lineage(
"a",
"WITH y AS (SELECT * FROM x) SELECT a FROM y JOIN z USING (uid)",
)
self.assertEqual(
node.source.sql(),
"WITH y AS (SELECT * FROM x AS x) SELECT a AS a FROM y AS y JOIN z AS z ON y.uid = z.uid",
)
self.assertEqual(node.alias, "")
downstream = node.downstream[0]
self.assertEqual(
downstream.source.sql(),
"?",
)
self.assertEqual(downstream.alias, "")
def test_lineage_values(self) -> None:
node = lineage(
"a",
"SELECT a FROM y",
sources={"y": "SELECT a FROM (VALUES (1), (2)) AS t (a)"},
)
self.assertEqual(
node.source.sql(),
"SELECT y.a AS a FROM (SELECT t.a AS a FROM (VALUES (1), (2)) AS t(a)) AS y /* source: y */",
)
self.assertEqual(node.alias, "")
downstream = node.downstream[0]
self.assertEqual(downstream.source.sql(), "SELECT t.a AS a FROM (VALUES (1), (2)) AS t(a)")
self.assertEqual(downstream.expression.sql(), "t.a AS a")
self.assertEqual(downstream.alias, "y")
downstream = downstream.downstream[0]
self.assertEqual(downstream.source.sql(), "(VALUES (1), (2)) AS t(a)")
self.assertEqual(downstream.expression.sql(), "a")
self.assertEqual(downstream.alias, "y")
def test_lineage_cte_name_appears_in_schema(self) -> None:
schema = {"a": {"b": {"t1": {"c1": "int"}, "t2": {"c2": "int"}}}}
node = lineage(
"c2",
"WITH t1 AS (SELECT * FROM a.b.t2), inter AS (SELECT * FROM t1) SELECT * FROM inter",
schema=schema,
)
self.assertEqual(
node.source.sql(),
"WITH t1 AS (SELECT t2.c2 AS c2 FROM a.b.t2 AS t2), inter AS (SELECT t1.c2 AS c2 FROM t1 AS t1) SELECT inter.c2 AS c2 FROM inter AS inter",
)
self.assertEqual(node.alias, "")
downstream = node.downstream[0]
self.assertEqual(downstream.source.sql(), "SELECT t1.c2 AS c2 FROM t1 AS t1")
self.assertEqual(downstream.expression.sql(), "t1.c2 AS c2")
self.assertEqual(downstream.alias, "")
downstream = downstream.downstream[0]
self.assertEqual(downstream.source.sql(), "SELECT t2.c2 AS c2 FROM a.b.t2 AS t2")
self.assertEqual(downstream.expression.sql(), "t2.c2 AS c2")
self.assertEqual(downstream.alias, "")
downstream = downstream.downstream[0]
self.assertEqual(downstream.source.sql(), "a.b.t2 AS t2")
self.assertEqual(downstream.expression.sql(), "a.b.t2 AS t2")
self.assertEqual(downstream.alias, "")
self.assertEqual(downstream.downstream, [])
def test_lineage_union(self) -> None:
node = lineage(
"x",
"SELECT ax AS x FROM a UNION SELECT bx FROM b UNION SELECT cx FROM c",
)
assert len(node.downstream) == 3
node = lineage(
"x",
"SELECT x FROM (SELECT ax AS x FROM a UNION SELECT bx FROM b UNION SELECT cx FROM c)",
)
assert len(node.downstream) == 3
def test_lineage_lateral_flatten(self) -> None:
node = lineage(
"VALUE",
"SELECT FLATTENED.VALUE FROM TEST_TABLE, LATERAL FLATTEN(INPUT => RESULT, OUTER => TRUE) FLATTENED",
dialect="snowflake",
)
self.assertEqual(node.name, "VALUE")
downstream = node.downstream[0]
self.assertEqual(downstream.name, "FLATTENED.VALUE")
self.assertEqual(
downstream.source.sql(dialect="snowflake"),
"LATERAL FLATTEN(INPUT => TEST_TABLE.RESULT, OUTER => TRUE) AS FLATTENED(SEQ, KEY, PATH, INDEX, VALUE, THIS)",
)
self.assertEqual(
downstream.expression.sql(dialect="snowflake"),
"VALUE",
)
self.assertEqual(len(downstream.downstream), 1)
downstream = downstream.downstream[0]
self.assertEqual(downstream.name, "TEST_TABLE.RESULT")
self.assertEqual(downstream.source.sql(dialect="snowflake"), "TEST_TABLE AS TEST_TABLE")
def test_subquery(self) -> None:
node = lineage(
"output",
"SELECT (SELECT max(t3.my_column) my_column FROM foo t3) AS output FROM table3",
)
self.assertEqual(node.name, "output")
node = node.downstream[0]
self.assertEqual(node.name, "my_column")
node = node.downstream[0]
self.assertEqual(node.name, "t3.my_column")
self.assertEqual(node.source.sql(), "foo AS t3")
node = lineage(
"y",
"SELECT SUM((SELECT max(a) a from x) + (SELECT min(b) b from x) + c) AS y FROM x",
)
self.assertEqual(node.name, "y")
self.assertEqual(len(node.downstream), 3)
self.assertEqual(node.downstream[0].name, "a")
self.assertEqual(node.downstream[1].name, "b")
self.assertEqual(node.downstream[2].name, "x.c")
node = lineage(
"x",
"WITH cte AS (SELECT a, b FROM z) SELECT sum(SELECT a FROM cte) AS x, (SELECT b FROM cte) as y FROM cte",
)
self.assertEqual(node.name, "x")
self.assertEqual(len(node.downstream), 1)
node = node.downstream[0]
self.assertEqual(node.name, "a")
node = node.downstream[0]
self.assertEqual(node.name, "cte.a")
node = node.downstream[0]
self.assertEqual(node.name, "z.a")
def test_lineage_cte_union(self) -> None:
query = """
WITH dataset AS (
SELECT *
FROM catalog.db.table_a
UNION
SELECT *
FROM catalog.db.table_b
)
SELECT x, created_at FROM dataset;
"""
node = lineage("x", query)
self.assertEqual(node.name, "x")
downstream_a = node.downstream[0]
self.assertEqual(downstream_a.name, "0")
self.assertEqual(downstream_a.source.sql(), "SELECT * FROM catalog.db.table_a AS table_a")
downstream_b = node.downstream[1]
self.assertEqual(downstream_b.name, "0")
self.assertEqual(downstream_b.source.sql(), "SELECT * FROM catalog.db.table_b AS table_b")
def test_lineage_source_union(self) -> None:
query = "SELECT x, created_at FROM dataset;"
node = lineage(
"x",
query,
sources={
"dataset": """
SELECT *
FROM catalog.db.table_a
UNION
SELECT *
FROM catalog.db.table_b
"""
},
)
self.assertEqual(node.name, "x")
downstream_a = node.downstream[0]
self.assertEqual(downstream_a.name, "0")
self.assertEqual(downstream_a.alias, "dataset")
self.assertEqual(downstream_a.source.sql(), "SELECT * FROM catalog.db.table_a AS table_a")
downstream_b = node.downstream[1]
self.assertEqual(downstream_b.name, "0")
self.assertEqual(downstream_b.alias, "dataset")
self.assertEqual(downstream_b.source.sql(), "SELECT * FROM catalog.db.table_b AS table_b")
def test_select_star(self) -> None:
node = lineage("x", "SELECT x from (SELECT * from table_a)")
self.assertEqual(node.name, "x")
downstream = node.downstream[0]
self.assertEqual(downstream.name, "_q_0.x")
self.assertEqual(downstream.source.sql(), "SELECT * FROM table_a AS table_a")
downstream = downstream.downstream[0]
self.assertEqual(downstream.name, "*")
self.assertEqual(downstream.source.sql(), "table_a AS table_a")
def test_unnest(self) -> None:
node = lineage(
"b",
"with _data as (select [struct(1 as a, 2 as b)] as col) select b from _data cross join unnest(col)",
)
self.assertEqual(node.name, "b")
|
