Efficient data loader

demo/install/base.py

@@ -13,7 +13,9 @@
 LIBRARY_ONE = os.path.join(RESOURCES, "library_without_checkouts.sql")
 LIBRARY_TWO = os.path.join(RESOURCES, "library_add_checkouts.sql")
 DEVCON_DATASET = os.path.join(RESOURCES, "devcon_dataset.sql")
-MOVIES_SQL_BZ2 = os.path.join(RESOURCES, "movie_collection.sql.bz2")
+MOVIES_SQL_TABLES = os.path.join(RESOURCES, "movie_collection_tables.sql")
+MOVIES_SQL_FKS = os.path.join(RESOURCES, "movie_collection_fks.sql")
+MOVIES_CSV = os.path.join(RESOURCES, 'movies_csv')
 ARXIV_SETUP_SQL = os.path.join(RESOURCES, 'arxiv_dataset_setup.sql')
 ARXIV_PAPERS_PICKLE = os.path.join(RESOURCES, 'arxiv_papers.pickle')
 LIBRARY_MANAGEMENT = 'Library Management'

demo/install/dumpcsvs.py

@@ -0,0 +1,40 @@
+"""
+Dump data for all the tables of a provided schema to separate {table_name}.csv files
+with header as column names.
+
+Usage: python dumpcsvs.py
+"""
+import psycopg
+import csv
+
+DB_NAME = "mathesar"
+DB_USER = "mathesar"
+DB_PASSWORD = "mathesar"
+DB_HOST = "mathesar_dev_db"
+SCHEMA_NAME = "Movie Collection"
+
+conn = psycopg.connect(
+    dbname=DB_NAME,
+    user=DB_USER,
+    password=DB_PASSWORD,
+    host=DB_HOST,
+    port=5432
+)
+
+# get names of tables.
+tables = conn.execute(
+    f"SELECT table_name FROM information_schema.tables WHERE table_schema = '{SCHEMA_NAME}'"
+).fetchall()
+
+for table in tables:
+    table_name = table[0]
+    with open(f'{table_name}.csv', 'w', newline="") as csv_file:
+        csv_writer = csv.writer(csv_file)
+        columns = conn.execute(
+            f"""SELECT column_name FROM information_schema.columns WHERE
+            table_schema = '{SCHEMA_NAME}' AND table_name = '{table_name}';"""
+        ).fetchall()
+        columns = [column[0] for column in columns]
+        csv_writer.writerow(columns)
+        with conn.cursor().copy(f"""COPY "{SCHEMA_NAME}"."{table_name}" TO STDOUT""") as copy:
+            csv_writer.writerows(copy.rows())

demo/install/movies_dataset.py

@@ -1,9 +1,8 @@
 """This module contains functions to load the Movie Collection dataset."""
-import bz2
-
+import os
 from sqlalchemy import text
 
-from demo.install.base import MOVIE_COLLECTION, MOVIES_SQL_BZ2
+from demo.install.base import MOVIE_COLLECTION, MOVIES_SQL_TABLES, MOVIES_CSV, MOVIES_SQL_FKS
 
 
 def load_movies_dataset(engine, safe_mode=False):
@@ -16,11 +15,15 @@ def load_movies_dataset(engine, safe_mode=False):
                    schema already exists instead of dropping it.
     """
     drop_schema_query = text(f"""DROP SCHEMA IF EXISTS "{MOVIE_COLLECTION}" CASCADE;""")
-    create_schema_query = text(f"""CREATE SCHEMA "{MOVIE_COLLECTION}";""")
-    set_search_path = text(f"""SET search_path="{MOVIE_COLLECTION}";""")
-    with engine.begin() as conn, bz2.open(MOVIES_SQL_BZ2, 'rt') as f:
+    with engine.begin() as conn, open(MOVIES_SQL_TABLES) as f, open(MOVIES_SQL_FKS) as f2:
         if safe_mode is False:
             conn.execute(drop_schema_query)
-        conn.execute(create_schema_query)
-        conn.execute(set_search_path)
         conn.execute(text(f.read()))
+        for file in os.scandir(MOVIES_CSV):
+            table_name = file.name.split('.csv')[0]
+            with open(file, 'r') as csv_file:
+                conn.connection.cursor().copy_expert(
+                    f"""COPY "{MOVIE_COLLECTION}"."{table_name}" FROM STDIN DELIMITER ',' CSV HEADER""",
+                    csv_file
+                )
+        conn.execute(text(f2.read()))

demo/install/resources/movie_collection_fks.sql

@@ -0,0 +1,105 @@
+SELECT pg_catalog.setval('"Departments_id_seq"', 12, true);
+SELECT pg_catalog.setval('"Genres_id_seq"', 10770, true);
+SELECT pg_catalog.setval('"Jobs_id_seq"', 419, true);
+SELECT pg_catalog.setval('"Movie Cast Map_id_seq"', 159012, true);
+SELECT pg_catalog.setval('"Movie Crew Map_id_seq"', 130711, true);
+SELECT pg_catalog.setval('"Movie Genre Map_id_seq"', 25886, true);
+SELECT pg_catalog.setval('"Movie Production Company Map_id_seq"', 19959, true);
+SELECT pg_catalog.setval('"Movie Production Country Map_id_seq"', 14087, true);
+SELECT pg_catalog.setval('"Movie Spoken Language Map_id_seq"', 14951, true);
+SELECT pg_catalog.setval('"Movies_id_seq"', 469172, true);
+SELECT pg_catalog.setval('"People_id_seq"', 1908262, true);
+SELECT pg_catalog.setval('"Production Companies_id_seq"', 95940, true);
+SELECT pg_catalog.setval('"Production Countries_id_seq"', 122, true);
+SELECT pg_catalog.setval('"Spoken Languages_id_seq"', 107, true);
+SELECT pg_catalog.setval('"Sub-Collections_id_seq"', 479971, true);
+
+ALTER TABLE ONLY "Departments"
+    ADD CONSTRAINT "Departments_pkey" PRIMARY KEY (id);
+
+ALTER TABLE ONLY "Genres"
+    ADD CONSTRAINT "Genres_pkey" PRIMARY KEY (id);
+
+ALTER TABLE ONLY "Jobs"
+    ADD CONSTRAINT "Jobs_pkey" PRIMARY KEY (id);
+
+ALTER TABLE ONLY "Movie Cast Map"
+    ADD CONSTRAINT "Movie Cast Map_pkey" PRIMARY KEY (id);
+
+ALTER TABLE ONLY "Movie Crew Map"
+    ADD CONSTRAINT "Movie Crew Map_pkey" PRIMARY KEY (id);
+
+ALTER TABLE ONLY "Movie Genre Map"
+    ADD CONSTRAINT "Movie Genre Map_pkey" PRIMARY KEY (id);
+
+ALTER TABLE ONLY "Movie Production Company Map"
+    ADD CONSTRAINT "Movie Production Company Map_pkey" PRIMARY KEY (id);
+
+ALTER TABLE ONLY "Movie Production Country Map"
+    ADD CONSTRAINT "Movie Production Country Map_pkey" PRIMARY KEY (id);
+
+ALTER TABLE ONLY "Movie Spoken Language Map"
+    ADD CONSTRAINT "Movie Spoken Language Map_pkey" PRIMARY KEY (id);
+
+ALTER TABLE ONLY "Movies"
+    ADD CONSTRAINT "Movies_pkey" PRIMARY KEY (id);
+
+ALTER TABLE ONLY "People"
+    ADD CONSTRAINT "People_pkey" PRIMARY KEY (id);
+
+ALTER TABLE ONLY "Production Companies"
+    ADD CONSTRAINT "Production Companies_pkey" PRIMARY KEY (id);
+
+ALTER TABLE ONLY "Production Countries"
+    ADD CONSTRAINT "Production Countries_pkey" PRIMARY KEY (id);
+
+ALTER TABLE ONLY "Spoken Languages"
+    ADD CONSTRAINT "Spoken Languages_pkey" PRIMARY KEY (id);
+
+ALTER TABLE ONLY "Sub-Collections"
+    ADD CONSTRAINT "Sub-Collections_pkey" PRIMARY KEY (id);
+
+ALTER TABLE ONLY "Movie Cast Map"
+    ADD CONSTRAINT "Movie Cast Map_Cast Member_fkey" FOREIGN KEY ("Cast Member") REFERENCES "People"(id);
+
+ALTER TABLE ONLY "Movie Cast Map"
+    ADD CONSTRAINT "Movie Cast Map_Movie_fkey" FOREIGN KEY ("Movie") REFERENCES "Movies"(id);
+
+ALTER TABLE ONLY "Movie Crew Map"
+    ADD CONSTRAINT "Movie Crew Map_Crew Member_fkey" FOREIGN KEY ("Crew Member") REFERENCES "People"(id);
+
+ALTER TABLE ONLY "Movie Crew Map"
+    ADD CONSTRAINT "Movie Crew Map_Department_fkey" FOREIGN KEY ("Department") REFERENCES "Departments"(id);
+
+ALTER TABLE ONLY "Movie Crew Map"
+    ADD CONSTRAINT "Movie Crew Map_Job_fkey" FOREIGN KEY ("Job") REFERENCES "Jobs"(id);
+
+ALTER TABLE ONLY "Movie Crew Map"
+    ADD CONSTRAINT "Movie Crew Map_Movie_fkey" FOREIGN KEY ("Movie") REFERENCES "Movies"(id);
+
+ALTER TABLE ONLY "Movie Genre Map"
+    ADD CONSTRAINT "Movie Genre Map_Genre_fkey" FOREIGN KEY ("Genre") REFERENCES "Genres"(id);
+
+ALTER TABLE ONLY "Movie Genre Map"
+    ADD CONSTRAINT "Movie Genre Map_Movie_fkey" FOREIGN KEY ("Movie") REFERENCES "Movies"(id);
+
+ALTER TABLE ONLY "Movie Production Company Map"
+    ADD CONSTRAINT "Movie Production Company Map_Movie_fkey" FOREIGN KEY ("Movie") REFERENCES "Movies"(id);
+
+ALTER TABLE ONLY "Movie Production Company Map"
+    ADD CONSTRAINT "Movie Production Company Map_Production Company_fkey" FOREIGN KEY ("Production Company") REFERENCES "Production Companies"(id);
+
+ALTER TABLE ONLY "Movie Production Country Map"
+    ADD CONSTRAINT "Movie Production Country Map_Movie_fkey" FOREIGN KEY ("Movie") REFERENCES "Movies"(id);
+
+ALTER TABLE ONLY "Movie Production Country Map"
+    ADD CONSTRAINT "Movie Production Country Map_Production Country_fkey" FOREIGN KEY ("Production Country") REFERENCES "Production Countries"(id);
+
+ALTER TABLE ONLY "Movie Spoken Language Map"
+    ADD CONSTRAINT "Movie Spoken Language Map_Movie_fkey" FOREIGN KEY ("Movie") REFERENCES "Movies"(id);
+
+ALTER TABLE ONLY "Movie Spoken Language Map"
+    ADD CONSTRAINT "Movie Spoken Language Map_Spoken Language_fkey" FOREIGN KEY ("Spoken Language") REFERENCES "Spoken Languages"(id);
+
+ALTER TABLE ONLY "Movies"
+    ADD CONSTRAINT "Movies_Sub-Collection_fkey" FOREIGN KEY ("Sub-Collection") REFERENCES "Sub-Collections"(id);