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Validated ORDER BY: TimescaleDB and SQLite

Every file of the TimescaleDB and SQLite versions side by side, with the lines that differ marked.

Compare TimescaleDB withSQLitePostgreSQLCockroachDBMySQLMariaDBDuckDBClickHouse

Configuration

sgl.yamldiffers
TimescaleDB
SQLite
1version: 1
1version: 1
2
2
3databases:
3databases:
4 - name: regatta
4 - name: regatta
5 dialect: postgres
5 dialect: sqlite
6 migrations: db/migrations
6 migrations: db/migrations
7 queries: db/queries
7 queries: db/queries
8 go:
8 go:
9 package: store
9 package: store
10 out: internal/store
10 out: internal/store
11 driver: database/sql

Migrations

db/migrations/0001_entries.up.sqldiffers
TimescaleDB
SQLite
1CREATE TABLE entries (
1CREATE TABLE entries (
2 id BIGINT GENERATED ALWAYS AS IDENTITY PRIMARY KEY,
2 id INTEGER PRIMARY KEY,
3 boat TEXT NOT NULL,
3 boat TEXT NOT NULL,
4 crew BIGINT NOT NULL,
4 crew INTEGER NOT NULL,
5 finish_seconds BIGINT NOT NULL
5 finish_seconds INTEGER NOT NULL
6);
6);
db/migrations/0001_entries.down.sqlidentical
TimescaleDB
SQLite
1DROP TABLE entries;
1DROP TABLE entries;

Queries

EnterBoatdiffers
TimescaleDB · db/queries/entries.sql
SQLite · db/queries/entries.sql
1-- sgl.query(EnterBoat, exec)
1-- sgl.query(EnterBoat, exec)
2INSERT INTO entries (boat, crew, finish_seconds) VALUES ($1, $2, $3);
2INSERT INTO entries (boat, crew, finish_seconds) VALUES (?, ?, ?);
ListEntriesidentical
TimescaleDB · db/queries/entries.sql
SQLite · db/queries/entries.sql
1-- sgl.query(ListEntries, many)
1-- sgl.query(ListEntries, many)
2-- sgl.sortable(order_by, [boat, crew, finish_seconds])
2-- sgl.sortable(order_by, [boat, crew, finish_seconds])
3SELECT id, boat, crew, finish_seconds FROM entries
3SELECT id, boat, crew, finish_seconds FROM entries

What sgl generates

EnterBoatidentical
TimescaleDB
SQLite
1func (queries *Queries) EnterBoat(ctx context.Context, params EnterBoatParams) error
1func (queries *Queries) EnterBoat(ctx context.Context, params EnterBoatParams) error
2
2
3type EnterBoatParams struct {
3type EnterBoatParams struct {
4 Boat string
4 Boat string
5 Crew int64
5 Crew int64
6 FinishSeconds int64
6 FinishSeconds int64
7}
7}
ListEntriesidentical
TimescaleDB
SQLite
1func (queries *Queries) ListEntries(ctx context.Context, params ListEntriesParams) ([]ListEntriesRow, error)
1func (queries *Queries) ListEntries(ctx context.Context, params ListEntriesParams) ([]ListEntriesRow, error)
2
2
3type ListEntriesParams struct {
3type ListEntriesParams struct {
4 OrderBy ListEntriesOrderBy
4 OrderBy ListEntriesOrderBy
5 OrderByDirection OrderDirection
5 OrderByDirection OrderDirection
6}
6}
7
7
8type ListEntriesRow struct {
8type ListEntriesRow struct {
9 ID int64 `json:"id"`
9 ID int64 `json:"id"`
10 Boat string `json:"boat"`
10 Boat string `json:"boat"`
11 Crew int64 `json:"crew"`
11 Crew int64 `json:"crew"`
12 FinishSeconds int64 `json:"finish_seconds"`
12 FinishSeconds int64 `json:"finish_seconds"`
13}
13}
14
14
15type ListEntriesOrderBy string
15type ListEntriesOrderBy string
16
16
17type OrderDirection string
17type OrderDirection string

The program

example.godiffers
TimescaleDB
SQLite
1package main
1package main
2
2
3import (
3import (
4 "context"
4 "context"
5 "database/sql"
5 "database/sql"
6 "fmt"
6 "fmt"
7 "io"
7 "io"
8 "time"
8 "time"
9
9
10 "seagull.sh/seagull/examples/postgres/012_sortable/internal/store"
10 "seagull.sh/seagull/examples/sqlite/012_sortable/internal/store"
11)
11)
12
12
13// run lists a regatta's entries in four orders. sgl.sortable(order_by, [boat, crew,
13// run lists a regatta's entries in four orders. sgl.sortable(order_by, [boat, crew,
14// finish_seconds]) has no placeholder: it gives ListEntriesParams an OrderBy field, typed
14// finish_seconds]) has no placeholder: it gives ListEntriesParams an OrderBy field, typed
15// with one constant per allowed column, and an OrderByDirection. The method appends ORDER
15// with one constant per allowed column, and an OrderByDirection. The method appends ORDER
16// BY only when OrderBy is one of the allowed columns, so a value that is not, such as raw
16// BY only when OrderBy is one of the allowed columns, so a value that is not, such as raw
17// text from a request, adds nothing to the SQL and the rows come back in whatever order
17// text from a request, adds nothing to the SQL and the rows come back unsorted. A
18// the server reads them, here the order they were entered. A sortable column the query
18// sortable column the query does not select makes sgl vet report Q011.
19// does not select makes sgl vet report Q011.
20//
19//
21// Takes database (*sql.DB) which is a migrated database.
20// Takes database (*sql.DB) which is a migrated database.
22// Takes output (io.Writer) which receives each listing.
21// Takes output (io.Writer) which receives each listing.
23//
22//
24// Returns error when a query fails.
23// Returns error when a query fails.
25func run(ctx context.Context, database *sql.DB, output io.Writer) error {
24func run(ctx context.Context, database *sql.DB, output io.Writer) error {
26 queries := store.New(database)
25 queries := store.New(database)
27
26
28 entries := []store.EnterBoatParams{
27 entries := []store.EnterBoatParams{
29 {Boat: "Kittiwake", Crew: 4, FinishSeconds: 3725},
28 {Boat: "Kittiwake", Crew: 4, FinishSeconds: 3725},
30 {Boat: "Salty Chip", Crew: 3, FinishSeconds: 3410},
29 {Boat: "Salty Chip", Crew: 3, FinishSeconds: 3410},
31 {Boat: "Gull Wing", Crew: 5, FinishSeconds: 3990},
30 {Boat: "Gull Wing", Crew: 5, FinishSeconds: 3990},
32 {Boat: "Driftwood", Crew: 2, FinishSeconds: 3588},
31 {Boat: "Driftwood", Crew: 2, FinishSeconds: 3588},
33 }
32 }
34 for _, entry := range entries {
33 for _, entry := range entries {
35 if err := queries.EnterBoat(ctx, entry); err != nil {
34 if err := queries.EnterBoat(ctx, entry); err != nil {
36 return fmt.Errorf("entering %s: %w", entry.Boat, err)
35 return fmt.Errorf("entering %s: %w", entry.Boat, err)
37 }
36 }
38 }
37 }
39
38
40 orders := []struct {
39 orders := []struct {
41 label string
40 label string
42 parameters store.ListEntriesParams
41 parameters store.ListEntriesParams
43 }{
42 }{
44 {label: "results", parameters: store.ListEntriesParams{OrderBy: store.ListEntriesOrderByFinishSeconds, OrderByDirection: store.OrderAsc}},
43 {label: "results", parameters: store.ListEntriesParams{OrderBy: store.ListEntriesOrderByFinishSeconds, OrderByDirection: store.OrderAsc}},
45 {label: "by boat", parameters: store.ListEntriesParams{OrderBy: store.ListEntriesOrderByBoat, OrderByDirection: store.OrderAsc}},
44 {label: "by boat", parameters: store.ListEntriesParams{OrderBy: store.ListEntriesOrderByBoat, OrderByDirection: store.OrderAsc}},
46 {label: "largest crew first", parameters: store.ListEntriesParams{OrderBy: store.ListEntriesOrderByCrew, OrderByDirection: store.OrderDesc}},
45 {label: "largest crew first", parameters: store.ListEntriesParams{OrderBy: store.ListEntriesOrderByCrew, OrderByDirection: store.OrderDesc}},
47 {label: "raw text, ignored", parameters: store.ListEntriesParams{OrderBy: "boat; DROP TABLE entries", OrderByDirection: store.OrderAsc}},
46 {label: "raw text, ignored", parameters: store.ListEntriesParams{OrderBy: "boat; DROP TABLE entries", OrderByDirection: store.OrderAsc}},
48 }
47 }
49 for _, order := range orders {
48 for _, order := range orders {
50 listed, err := queries.ListEntries(ctx, order.parameters)
49 listed, err := queries.ListEntries(ctx, order.parameters)
51 if err != nil {
50 if err != nil {
52 return fmt.Errorf("listing entries %s: %w", order.label, err)
51 return fmt.Errorf("listing entries %s: %w", order.label, err)
53 }
52 }
54 fmt.Fprintf(output, "%s:\n", order.label)
53 fmt.Fprintf(output, "%s:\n", order.label)
55 for _, entry := range listed {
54 for _, entry := range listed {
56 finish := time.Duration(entry.FinishSeconds) * time.Second
55 finish := time.Duration(entry.FinishSeconds) * time.Second
57 fmt.Fprintf(output, " %-10s crew %d %s\n", entry.Boat, entry.Crew, finish)
56 fmt.Fprintf(output, " %-10s crew %d %s\n", entry.Boat, entry.Crew, finish)
58 }
57 }
59 }
58 }
60 return nil
59 return nil
61}
60}