use psql for executing sql files

This allows to run larger files without needing to keep
them in memory.

test/python/test_db_utils.py

@@ -5,26 +5,37 @@ import psycopg2
 import pytest
 
 import nominatim.db.utils as db_utils
+from nominatim.errors import UsageError
 
-def test_execute_file_success(temp_db_conn, tmp_path):
+@pytest.fixture
+def dsn(temp_db):
+    return 'dbname=' + temp_db
+
+def test_execute_file_success(dsn, temp_db_cursor, tmp_path):
     tmpfile = tmp_path / 'test.sql'
     tmpfile.write_text('CREATE TABLE test (id INT);\nINSERT INTO test VALUES(56);')
 
-    db_utils.execute_file(temp_db_conn, tmpfile)
+    db_utils.execute_file(dsn, tmpfile)
 
-    with temp_db_conn.cursor() as cur:
-        cur.execute('SELECT * FROM test')
+    temp_db_cursor.execute('SELECT * FROM test')
 
-        assert cur.rowcount == 1
-        assert cur.fetchone()[0] == 56
+    assert temp_db_cursor.rowcount == 1
+    assert temp_db_cursor.fetchone()[0] == 56
 
-def test_execute_file_bad_file(temp_db_conn, tmp_path):
+def test_execute_file_bad_file(dsn, tmp_path):
     with pytest.raises(FileNotFoundError):
-        db_utils.execute_file(temp_db_conn, tmp_path / 'test2.sql')
+        db_utils.execute_file(dsn, tmp_path / 'test2.sql')
 
-def test_execute_file_bad_sql(temp_db_conn, tmp_path):
+def test_execute_file_bad_sql(dsn, tmp_path):
     tmpfile = tmp_path / 'test.sql'
     tmpfile.write_text('CREATE STABLE test (id INT)')
 
-    with pytest.raises(psycopg2.ProgrammingError):
-        db_utils.execute_file(temp_db_conn, tmpfile)
+    with pytest.raises(UsageError):
+        db_utils.execute_file(dsn, tmpfile)
+
+
+def test_execute_file_bad_sql_ignore_errors(dsn, tmp_path):
+    tmpfile = tmp_path / 'test.sql'
+    tmpfile.write_text('CREATE STABLE test (id INT)')
+
+    db_utils.execute_file(dsn, tmpfile, ignore_errors=True)