Fix issues when running solacc

src/databricks/labs/ucx/source_code/linters/pyspark.py

@@ -113,26 +113,24 @@ def lint(
         self, from_table: FromTable, index: MigrationIndex, session_state: CurrentSessionState, node: Call
     ) -> Iterator[Advice]:
         table_arg = self._get_table_arg(node)
-
-        if not isinstance(table_arg, Const):
-            assert isinstance(node.func, Attribute)  # always true, avoids a pylint warning
-            yield Advisory.from_node(
+        table_name = table_arg.as_string().strip("'").strip('"')
+        for inferred in Tree(table_arg).infer_values(session_state):
+            if not inferred.is_inferred():
+                yield Advisory.from_node(
+                    code='table-migrate',
+                    message=f"Can't migrate '{node.as_string()}' because its table name argument cannot be computed",
+                    node=node,
+                )
+                continue
+            dst = self._find_dest(index, inferred.as_string(), from_table.schema)
+            if dst is None:
+                continue
+            yield Deprecation.from_node(
                 code='table-migrate',
-                message=f"Can't migrate '{node.func.attrname}' because its table name argument is not a constant",
+                message=f"Table {table_name} is migrated to {dst.destination()} in Unity Catalog",
+                # SQLGlot does not propagate tokens yet. See https://github.com/tobymao/sqlglot/issues/3159
                 node=node,
             )
-            return
-
-        dst = self._find_dest(index, table_arg.value, from_table.schema)
-        if dst is None:
-            return
-
-        yield Deprecation.from_node(
-            code='table-migrate',
-            message=f"Table {table_arg.value} is migrated to {dst.destination()} in Unity Catalog",
-            # SQLGlot does not propagate tokens yet. See https://github.com/tobymao/sqlglot/issues/3159
-            node=node,
-        )
 
     def apply(self, from_table: FromTable, index: MigrationIndex, node: Call) -> None:
         table_arg = self._get_table_arg(node)

src/databricks/labs/ucx/source_code/queries.py

@@ -2,7 +2,7 @@
 
 import logging
 import sqlglot
-from sqlglot.expressions import Table, Expression, Use
+from sqlglot.expressions import Table, Expression, Use, Create
 from databricks.labs.ucx.hive_metastore.migration_status import MigrationIndex
 from databricks.labs.ucx.source_code.base import Advice, Deprecation, Fixer, Linter, CurrentSessionState
 
@@ -52,6 +52,11 @@ def lint(self, code: str) -> Iterable[Advice]:
                     # the schema  as the table name.
                     self._session_state.schema = table.name
                     continue
+                if isinstance(statement, Create) and statement.kind == "SCHEMA":
+                    # Sqlglot captures the schema name in the Create statement as a Table, with
+                    # the schema  as the db name.
+                    self._session_state.schema = table.db
+                    continue
 
                 # we only migrate tables in the hive_metastore catalog
                 if self._catalog(table) != 'hive_metastore':

tests/unit/source_code/linters/test_pyspark.py

@@ -16,6 +16,17 @@ def test_spark_no_sql(empty_index):
     assert not list(sqf.lint("print(1)"))
 
 
+def test_spark_dynamic_sql(empty_index):
+    source = """
+schema="some_schema"
+df4.write.saveAsTable(f"{schema}.member_measure")
+"""
+    session_state = CurrentSessionState()
+    ftf = FromTable(empty_index, session_state)
+    sqf = SparkSql(ftf, empty_index, session_state)
+    assert not list(sqf.lint(source))
+
+
 def test_spark_sql_no_match(empty_index):
     session_state = CurrentSessionState()
     ftf = FromTable(empty_index, session_state)

tests/unit/source_code/samples/functional/pyspark/catalog/spark-catalog-cache-table.py

@@ -13,9 +13,9 @@
 spark.catalog.cacheTable(storageLevel=None, tableName="old.things")
 
 ## Some calls that use a variable whose value is unknown: they could potentially reference a migrated table.
-# ucx[table-migrate:+1:0:+1:30] Can't migrate 'cacheTable' because its table name argument is not a constant
+# ucx[table-migrate:+1:0:+1:30] Can't migrate 'spark.catalog.cacheTable(name)' because its table name argument cannot be computed
 spark.catalog.cacheTable(name)
-# ucx[table-migrate:+1:0:+1:40] Can't migrate 'cacheTable' because its table name argument is not a constant
+# ucx[table-migrate:+1:0:+1:40] Can't migrate 'spark.catalog.cacheTable(f'boop{stuff}')' because its table name argument cannot be computed
 spark.catalog.cacheTable(f"boop{stuff}")
 
 ## Some trivial references to the method or table in unrelated contexts that should not trigger warnigns.

tests/unit/source_code/samples/functional/pyspark/catalog/spark-catalog-create-external-table.py

@@ -27,10 +27,10 @@
     do_stuff_with(df)
 
     ## Some calls that use a variable whose value is unknown: they could potentially reference a migrated table.
-    # ucx[table-migrate:+1:9:+1:48] Can't migrate 'createExternalTable' because its table name argument is not a constant
+    # ucx[table-migrate:+1:9:+1:48] Can't migrate 'spark.catalog.createExternalTable(name)' because its table name argument cannot be computed
     df = spark.catalog.createExternalTable(name)
     do_stuff_with(df)
-    # ucx[table-migrate:+1:9:+1:58] Can't migrate 'createExternalTable' because its table name argument is not a constant
+    # ucx[table-migrate:+1:9:+1:58] Can't migrate 'spark.catalog.createExternalTable(f'boop{stuff}')' because its table name argument cannot be computed
     df = spark.catalog.createExternalTable(f"boop{stuff}")
     do_stuff_with(df)
 

tests/unit/source_code/samples/functional/pyspark/catalog/spark-catalog-create-table.py

@@ -27,10 +27,10 @@
     do_stuff_with(df)
 
     ## Some calls that use a variable whose value is unknown: they could potentially reference a migrated table.
-    # ucx[table-migrate:+1:9:+1:40] Can't migrate 'createTable' because its table name argument is not a constant
+    # ucx[table-migrate:+1:9:+1:40] Can't migrate 'spark.catalog.createTable(name)' because its table name argument cannot be computed
     df = spark.catalog.createTable(name)
     do_stuff_with(df)
-    # ucx[table-migrate:+1:9:+1:50] Can't migrate 'createTable' because its table name argument is not a constant
+    # ucx[table-migrate:+1:9:+1:50] Can't migrate 'spark.catalog.createTable(f'boop{stuff}')' because its table name argument cannot be computed
     df = spark.catalog.createTable(f"boop{stuff}")
     do_stuff_with(df)
 

tests/unit/source_code/samples/functional/pyspark/catalog/spark-catalog-get-table.py

@@ -16,10 +16,10 @@
     do_stuff_with(table)
 
     ## Some calls that use a variable whose value is unknown: they could potentially reference a migrated table.
-    # ucx[table-migrate:+1:12:+1:40] Can't migrate 'getTable' because its table name argument is not a constant
+    # ucx[table-migrate:+1:12:+1:40] Can't migrate 'spark.catalog.getTable(name)' because its table name argument cannot be computed
     table = spark.catalog.getTable(name)
     do_stuff_with(table)
-    # ucx[table-migrate:+1:12:+1:50] Can't migrate 'getTable' because its table name argument is not a constant
+    # ucx[table-migrate:+1:12:+1:50] Can't migrate 'spark.catalog.getTable(f'boop{stuff}')' because its table name argument cannot be computed
     table = spark.catalog.getTable(f"boop{stuff}")
     do_stuff_with(table)
 

tests/unit/source_code/samples/functional/pyspark/catalog/spark-catalog-is-cached.py

@@ -13,9 +13,9 @@
     cached_previously = spark.catalog.isCached("old.things", "extra-argument")
 
     ## Some calls that use a variable whose value is unknown: they could potentially reference a migrated table.
-    # ucx[table-migrate:+1:24:+1:52] Can't migrate 'isCached' because its table name argument is not a constant
+    # ucx[table-migrate:+1:24:+1:52] Can't migrate 'spark.catalog.isCached(name)' because its table name argument cannot be computed
     cached_previously = spark.catalog.isCached(name)
-    # ucx[table-migrate:+1:24:+1:62] Can't migrate 'isCached' because its table name argument is not a constant
+    # ucx[table-migrate:+1:24:+1:62] Can't migrate 'spark.catalog.isCached(f'boop{stuff}')' because its table name argument cannot be computed
     cached_previously = spark.catalog.isCached(f"boop{stuff}")
 
     ## Some trivial references to the method or table in unrelated contexts that should not trigger warnigns.

tests/unit/source_code/samples/functional/pyspark/catalog/spark-catalog-list-columns.py

@@ -23,9 +23,9 @@
     columns = spark.catalog.listColumns(dbName="old", name="things")
 
     ## Some calls that use a variable whose value is unknown: they could potentially reference a migrated table.
-    # ucx[table-migrate:+1:14:+1:45] Can't migrate 'listColumns' because its table name argument is not a constant
+    # ucx[table-migrate:+1:14:+1:45] Can't migrate 'spark.catalog.listColumns(name)' because its table name argument cannot be computed
     columns = spark.catalog.listColumns(name)
-    # ucx[table-migrate:+1:14:+1:55] Can't migrate 'listColumns' because its table name argument is not a constant
+    # ucx[table-migrate:+1:14:+1:55] Can't migrate 'spark.catalog.listColumns(f'boop{stuff}')' because its table name argument cannot be computed
     columns = spark.catalog.listColumns(f"boop{stuff}")
 
     ## Some trivial references to the method or table in unrelated contexts that should not trigger warnigns.

tests/unit/source_code/samples/functional/pyspark/catalog/spark-catalog-list-tables.py

@@ -33,12 +33,12 @@
 ## Some calls that use a variable whose value is unknown: they could potentially reference a migrated database.
 # ucx[table-migrate:+3:13:+3:43] Call to 'listTables' will return a list of <catalog>.<database>.<table> instead of <database>.<table>.
 ## TODO: The following isn't yet implemented:
-## ucx[table-migrate:+1:13:+1:0] Can't migrate 'listTables' because its database name argument is not a constant
+## ucx[table-migrate:+1:13:+1:0] Can't migrate 'listTables' because its database name argument cannot be computed
 for table in spark.catalog.listTables(name):
     do_stuff_with_table(table)
 # ucx[table-migrate:+3:13:+3:53] Call to 'listTables' will return a list of <catalog>.<database>.<table> instead of <database>.<table>.
 ## TODO: The following isn't yet implemented:
-## ucx[table-migrate:+1:13:+1:0] Can't migrate 'listTables' because its database name argument is not a constant
+## ucx[table-migrate:+1:13:+1:0] Can't migrate 'listTables' because its database name argument cannot be computed
 for table in spark.catalog.listTables(f"boop{stuff}"):
     do_stuff_with_table(table)
 

tests/unit/source_code/samples/functional/pyspark/catalog/spark-catalog-recover-partitions.py

@@ -13,9 +13,9 @@
     spark.catalog.recoverPartitions("old.things", "extra-argument")
 
     ## Some calls that use a variable whose value is unknown: they could potentially reference a migrated table.
-    # ucx[table-migrate:+1:4:+1:41] Can't migrate 'recoverPartitions' because its table name argument is not a constant
+    # ucx[table-migrate:+1:4:+1:41] Can't migrate 'spark.catalog.recoverPartitions(name)' because its table name argument cannot be computed
     spark.catalog.recoverPartitions(name)
-    # ucx[table-migrate:+1:4:+1:51] Can't migrate 'recoverPartitions' because its table name argument is not a constant
+    # ucx[table-migrate:+1:4:+1:51] Can't migrate 'spark.catalog.recoverPartitions(f'boop{stuff}')' because its table name argument cannot be computed
     spark.catalog.recoverPartitions(f"boop{stuff}")
 
     ## Some trivial references to the method or table in unrelated contexts that should not trigger warnigns.

tests/unit/source_code/samples/functional/pyspark/catalog/spark-catalog-refresh-table.py

@@ -13,9 +13,9 @@
     spark.catalog.refreshTable("old.things", "extra-argument")
 
     ## Some calls that use a variable whose value is unknown: they could potentially reference a migrated table.
-    # ucx[table-migrate:+1:4:+1:36] Can't migrate 'refreshTable' because its table name argument is not a constant
+    # ucx[table-migrate:+1:4:+1:36] Can't migrate 'spark.catalog.refreshTable(name)' because its table name argument cannot be computed
     spark.catalog.refreshTable(name)
-    # ucx[table-migrate:+1:4:+1:46] Can't migrate 'refreshTable' because its table name argument is not a constant
+    # ucx[table-migrate:+1:4:+1:46] Can't migrate 'spark.catalog.refreshTable(f'boop{stuff}')' because its table name argument cannot be computed
     spark.catalog.refreshTable(f"boop{stuff}")
 
     ## Some trivial references to the method or table in unrelated contexts that should not trigger warnigns.

tests/unit/source_code/samples/functional/pyspark/catalog/spark-catalog-table-exists.py

@@ -26,10 +26,10 @@
         pass
 
     ## Some calls that use a variable whose value is unknown: they could potentially reference a migrated table.
-    # ucx[table-migrate:+1:7:+1:38] Can't migrate 'tableExists' because its table name argument is not a constant
+    # ucx[table-migrate:+1:7:+1:38] Can't migrate 'spark.catalog.tableExists(name)' because its table name argument cannot be computed
     if spark.catalog.tableExists(name):
         pass
-    # ucx[table-migrate:+1:7:+1:48] Can't migrate 'tableExists' because its table name argument is not a constant
+    # ucx[table-migrate:+1:7:+1:48] Can't migrate 'spark.catalog.tableExists(f'boot{stuff}')' because its table name argument cannot be computed
     if spark.catalog.tableExists(f"boot{stuff}"):
         pass
 

tests/unit/source_code/samples/functional/pyspark/catalog/spark-catalog-uncache-table.py

@@ -13,9 +13,9 @@
     spark.catalog.uncacheTable("old.things", "extra-argument")
 
     ## Some calls that use a variable whose value is unknown: they could potentially reference a migrated table.
-    # ucx[table-migrate:+1:4:+1:36] Can't migrate 'uncacheTable' because its table name argument is not a constant
+    # ucx[table-migrate:+1:4:+1:36] Can't migrate 'spark.catalog.uncacheTable(name)' because its table name argument cannot be computed
     spark.catalog.uncacheTable(name)
-    # ucx[table-migrate:+1:4:+1:46] Can't migrate 'uncacheTable' because its table name argument is not a constant
+    # ucx[table-migrate:+1:4:+1:46] Can't migrate 'spark.catalog.uncacheTable(f'boop{stuff}')' because its table name argument cannot be computed
     spark.catalog.uncacheTable(f"boop{stuff}")
 
     ## Some trivial references to the method or table in unrelated contexts that should not trigger warnigns.

tests/unit/source_code/samples/functional/pyspark/dataframe-write-insert-into.py

@@ -17,9 +17,9 @@
     df.write.insertInto(overwrite=None, tableName="old.things")
 
     ## Some calls that use a variable whose value is unknown: they could potentially reference a migrated table.
-    # ucx[table-migrate:+1:4:+1:29] Can't migrate 'insertInto' because its table name argument is not a constant
+    # ucx[table-migrate:+1:4:+1:29] Can't migrate 'df.write.insertInto(name)' because its table name argument cannot be computed
     df.write.insertInto(name)
-    # ucx[table-migrate:+1:4:+1:39] Can't migrate 'insertInto' because its table name argument is not a constant
+    # ucx[table-migrate:+1:4:+1:39] Can't migrate 'df.write.insertInto(f'boop{stuff}')' because its table name argument cannot be computed
     df.write.insertInto(f"boop{stuff}")
 
     ## Some trivial references to the method or table in unrelated contexts that should not trigger warnigns.

tests/unit/source_code/samples/functional/pyspark/dataframe-write-save-as-table.py

@@ -17,9 +17,9 @@
     df.write.saveAsTable(format="xyz", name="old.things")
 
     ## Some calls that use a variable whose value is unknown: they could potentially reference a migrated table.
-    # ucx[table-migrate:+1:4:+1:46] Can't migrate 'saveAsTable' because its table name argument is not a constant
+    # ucx[table-migrate:+1:4:+1:46] Can't migrate 'df.write.format('delta').saveAsTable(name)' because its table name argument cannot be computed
     df.write.format("delta").saveAsTable(name)
-    # ucx[table-migrate:+1:4:+1:56] Can't migrate 'saveAsTable' because its table name argument is not a constant
+    # ucx[table-migrate:+1:4:+1:56] Can't migrate 'df.write.format('delta').saveAsTable(f'boop{stuff}')' because its table name argument cannot be computed
     df.write.format("delta").saveAsTable(f"boop{stuff}")
 
     ## Some trivial references to the method or table in unrelated contexts that should not trigger warnigns.

tests/unit/source_code/samples/functional/pyspark/spark-table.py

@@ -20,12 +20,12 @@
     do_stuff_with(df)
 
     ## Some calls that use a variable whose value is unknown: they could potentially reference a migrated table.
-    # ucx[table-migrate:+3:9:+3:26] Can't migrate 'table' because its table name argument is not a constant
+    # ucx[table-migrate:+3:9:+3:26] Can't migrate 'spark.table(name)' because its table name argument cannot be computed
     # TODO: Fix false positive:
     # ucx[table-migrate:+1:9:+1:26] The default format changed in Databricks Runtime 8.0, from Parquet to Delta
     df = spark.table(name)
     do_stuff_with(df)
-    # ucx[table-migrate:+3:9:+3:36] Can't migrate 'table' because its table name argument is not a constant
+    # ucx[table-migrate:+3:9:+3:36] Can't migrate 'spark.table(f'boop{stuff}')' because its table name argument cannot be computed
     # TODO: Fix false positive:
     # ucx[table-migrate:+1:9:+1:36] The default format changed in Databricks Runtime 8.0, from Parquet to Delta
     df = spark.table(f"boop{stuff}")

tests/unit/source_code/test_queries.py

@@ -77,3 +77,11 @@ def test_use_database_stops_migration(migration_index):
     )
     transformed_query = ftf.apply(old_query)
     assert transformed_query == new_query
+
+
+def test_parses_create_schema(migration_index):
+    query = "CREATE SCHEMA xyz"
+    session_state = CurrentSessionState(schema="old")
+    ftf = FromTable(migration_index, session_state=session_state)
+    advices = ftf.lint(query)
+    assert not list(advices)