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Tracer mechanism for showing underlying SQL queries

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* Pass a tracer= function to Database constructor
* New db.tracer() contextmanager
* Neater SQL indentation, because tracer means it could be visible now
* New db.execute() and db.executescript() methods

Closes #150
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Simon Willison 2020-09-07 14:56:59 -07:00 • committed by GitHub
commit cf2cb244fa
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12 changed files with 231 additions and 79 deletions
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10
tests/test_create_view.py
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@ -4,7 +4,7 @@ from sqlite_utils.utils import OperationalError
def test_create_view(fresh_db):
fresh_db.create_view("bar", "select 1 + 1")
rows = fresh_db.conn.execute("select * from bar").fetchall()
rows = fresh_db.execute("select * from bar").fetchall()
assert [(2,)] == rows
@ -23,7 +23,7 @@ def test_create_view_ignore(fresh_db):
fresh_db.create_view("bar", "select 1 + 1").create_view(
"bar", "select 1 + 2", ignore=True
)
rows = fresh_db.conn.execute("select * from bar").fetchall()
rows = fresh_db.execute("select * from bar").fetchall()
assert [(2,)] == rows
@ -31,13 +31,13 @@ def test_create_view_replace(fresh_db):
fresh_db.create_view("bar", "select 1 + 1").create_view(
"bar", "select 1 + 2", replace=True
)
rows = fresh_db.conn.execute("select * from bar").fetchall()
rows = fresh_db.execute("select * from bar").fetchall()
assert [(3,)] == rows
def test_create_view_replace_with_same_does_nothing(fresh_db):
fresh_db.create_view("bar", "select 1 + 1")
initial_version = fresh_db.conn.execute("PRAGMA schema_version").fetchone()[0]
initial_version = fresh_db.execute("PRAGMA schema_version").fetchone()[0]
fresh_db.create_view("bar", "select 1 + 1", replace=True)
after_version = fresh_db.conn.execute("PRAGMA schema_version").fetchone()[0]
after_version = fresh_db.execute("PRAGMA schema_version").fetchone()[0]
assert after_version == initial_version