nostr-rs-relay/src/repo/sqlite_migration.rs
Greg Heartsfield abc356c17d perf(sqlite): index tags with their kind/created_at fields
This updates the DB schema to remove the distinction between hex and
non-hex tag values, for simplicity.  The space savings did not seem to
be worth the extra complexity.

The SQLite tags table is denormalized to duplicate kind/created_at to
improve the ability of tag indexes to filter data.
2023-02-12 14:33:40 -06:00

732 lines
26 KiB
Rust

//! Database schema and migrations
use crate::db::PooledConnection;
use crate::error::Result;
use crate::event::{single_char_tagname, Event};
use crate::utils::is_lower_hex;
use const_format::formatcp;
use rusqlite::limits::Limit;
use rusqlite::params;
use rusqlite::Connection;
use std::cmp::Ordering;
use std::time::Instant;
use tracing::{debug, error, info};
use indicatif::{ProgressBar, ProgressStyle};
/// Startup DB Pragmas
pub const STARTUP_SQL: &str = r##"
PRAGMA main.synchronous = NORMAL;
PRAGMA foreign_keys = ON;
PRAGMA journal_size_limit = 32768;
PRAGMA temp_store = 2; -- use memory, not temp files
PRAGMA main.cache_size = 20000; -- 80MB max cache size per conn
pragma mmap_size = 17179869184; -- cap mmap at 16GB
"##;
/// Latest database version
pub const DB_VERSION: usize = 16;
/// Schema definition
const INIT_SQL: &str = formatcp!(
r##"
-- Database settings
PRAGMA encoding = "UTF-8";
PRAGMA journal_mode = WAL;
PRAGMA auto_vacuum = FULL;
PRAGMA main.synchronous=NORMAL;
PRAGMA foreign_keys = ON;
PRAGMA application_id = 1654008667;
PRAGMA user_version = {};
-- Event Table
CREATE TABLE IF NOT EXISTS event (
id INTEGER PRIMARY KEY,
event_hash BLOB NOT NULL, -- 4-byte hash
first_seen INTEGER NOT NULL, -- when the event was first seen (not authored!) (seconds since 1970)
created_at INTEGER NOT NULL, -- when the event was authored
author BLOB NOT NULL, -- author pubkey
delegated_by BLOB, -- delegator pubkey (NIP-26)
kind INTEGER NOT NULL, -- event kind
hidden INTEGER, -- relevant for queries
content TEXT NOT NULL -- serialized json of event object
);
-- Event Indexes
CREATE UNIQUE INDEX IF NOT EXISTS event_hash_index ON event(event_hash);
CREATE INDEX IF NOT EXISTS author_index ON event(author);
CREATE INDEX IF NOT EXISTS kind_index ON event(kind);
CREATE INDEX IF NOT EXISTS created_at_index ON event(created_at);
CREATE INDEX IF NOT EXISTS delegated_by_index ON event(delegated_by);
CREATE INDEX IF NOT EXISTS event_composite_index ON event(kind,created_at);
CREATE INDEX IF NOT EXISTS kind_author_index ON event(kind,author);
CREATE INDEX IF NOT EXISTS kind_created_at_index ON event(kind,created_at);
CREATE INDEX IF NOT EXISTS author_created_at_index ON event(author,created_at);
CREATE INDEX IF NOT EXISTS author_kind_index ON event(author,kind);
-- Tag Table
-- Tag values are stored as either a BLOB (if they come in as a
-- hex-string), or TEXT otherwise.
-- This means that searches need to select the appropriate column.
-- We duplicate the kind/created_at to make indexes much more efficient.
CREATE TABLE IF NOT EXISTS tag (
id INTEGER PRIMARY KEY,
event_id INTEGER NOT NULL, -- an event ID that contains a tag.
name TEXT, -- the tag name ("p", "e", whatever)
value TEXT, -- the tag value, if not hex.
value_hex BLOB, -- the tag value, if it can be interpreted as a lowercase hex string.
created_at INTEGER NOT NULL, -- when the event was authored
kind INTEGER NOT NULL, -- event kind
FOREIGN KEY(event_id) REFERENCES event(id) ON UPDATE CASCADE ON DELETE CASCADE
);
CREATE INDEX IF NOT EXISTS tag_val_index ON tag(value);
CREATE INDEX IF NOT EXISTS tag_composite_index ON tag(event_id,name,value);
CREATE INDEX IF NOT EXISTS tag_name_eid_index ON tag(name,event_id,value);
CREATE INDEX IF NOT EXISTS tag_covering_index ON tag(name,kind,value,created_at,event_id);
-- NIP-05 User Validation
CREATE TABLE IF NOT EXISTS user_verification (
id INTEGER PRIMARY KEY,
metadata_event INTEGER NOT NULL, -- the metadata event used for this validation.
name TEXT NOT NULL, -- the nip05 field value (user@domain).
verified_at INTEGER, -- timestamp this author/nip05 was most recently verified.
failed_at INTEGER, -- timestamp a verification attempt failed (host down).
failure_count INTEGER DEFAULT 0, -- number of consecutive failures.
FOREIGN KEY(metadata_event) REFERENCES event(id) ON UPDATE CASCADE ON DELETE CASCADE
);
CREATE INDEX IF NOT EXISTS user_verification_name_index ON user_verification(name);
CREATE INDEX IF NOT EXISTS user_verification_event_index ON user_verification(metadata_event);
"##,
DB_VERSION
);
/// Determine the current application database schema version.
pub fn curr_db_version(conn: &mut Connection) -> Result<usize> {
let query = "PRAGMA user_version;";
let curr_version = conn.query_row(query, [], |row| row.get(0))?;
Ok(curr_version)
}
/// Determine event count
pub fn db_event_count(conn: &mut Connection) -> Result<usize> {
let query = "SELECT count(*) FROM event;";
let count = conn.query_row(query, [], |row| row.get(0))?;
Ok(count)
}
/// Determine tag count
pub fn db_tag_count(conn: &mut Connection) -> Result<usize> {
let query = "SELECT count(*) FROM tag;";
let count = conn.query_row(query, [], |row| row.get(0))?;
Ok(count)
}
fn mig_init(conn: &mut PooledConnection) -> usize {
match conn.execute_batch(INIT_SQL) {
Ok(()) => {
info!(
"database pragma/schema initialized to v{}, and ready",
DB_VERSION
);
}
Err(err) => {
error!("update failed: {}", err);
panic!("database could not be initialized");
}
}
DB_VERSION
}
/// Upgrade DB to latest version, and execute pragma settings
pub fn upgrade_db(conn: &mut PooledConnection) -> Result<usize> {
// check the version.
let mut curr_version = curr_db_version(conn)?;
info!("DB version = {:?}", curr_version);
debug!(
"SQLite max query parameters: {}",
conn.limit(Limit::SQLITE_LIMIT_VARIABLE_NUMBER)
);
debug!(
"SQLite max table/blob/text length: {} MB",
(f64::from(conn.limit(Limit::SQLITE_LIMIT_LENGTH)) / f64::from(1024 * 1024)).floor()
);
debug!(
"SQLite max SQL length: {} MB",
(f64::from(conn.limit(Limit::SQLITE_LIMIT_SQL_LENGTH)) / f64::from(1024 * 1024)).floor()
);
match curr_version.cmp(&DB_VERSION) {
// Database is new or not current
Ordering::Less => {
// initialize from scratch
if curr_version == 0 {
curr_version = mig_init(conn);
}
// for initialized but out-of-date schemas, proceed to
// upgrade sequentially until we are current.
if curr_version == 1 {
curr_version = mig_1_to_2(conn)?;
}
if curr_version == 2 {
curr_version = mig_2_to_3(conn)?;
}
if curr_version == 3 {
curr_version = mig_3_to_4(conn)?;
}
if curr_version == 4 {
curr_version = mig_4_to_5(conn)?;
}
if curr_version == 5 {
curr_version = mig_5_to_6(conn)?;
}
if curr_version == 6 {
curr_version = mig_6_to_7(conn)?;
}
if curr_version == 7 {
curr_version = mig_7_to_8(conn)?;
}
if curr_version == 8 {
curr_version = mig_8_to_9(conn)?;
}
if curr_version == 9 {
curr_version = mig_9_to_10(conn)?;
}
if curr_version == 10 {
curr_version = mig_10_to_11(conn)?;
}
if curr_version == 11 {
curr_version = mig_11_to_12(conn)?;
}
if curr_version == 12 {
curr_version = mig_12_to_13(conn)?;
}
if curr_version == 13 {
curr_version = mig_13_to_14(conn)?;
}
if curr_version == 14 {
curr_version = mig_14_to_15(conn)?;
}
if curr_version == 15 {
curr_version = mig_15_to_16(conn)?;
}
if curr_version == DB_VERSION {
info!(
"All migration scripts completed successfully. Welcome to v{}.",
DB_VERSION
);
}
}
// Database is current, all is good
Ordering::Equal => {
debug!("Database version was already current (v{DB_VERSION})");
}
// Database is newer than what this code understands, abort
Ordering::Greater => {
panic!(
"Database version is newer than supported by this executable (v{curr_version} > v{DB_VERSION})",
);
}
}
// Setup PRAGMA
conn.execute_batch(STARTUP_SQL)?;
debug!("SQLite PRAGMA startup completed");
Ok(DB_VERSION)
}
pub fn rebuild_tags(conn: &mut PooledConnection) -> Result<()> {
// Check how many events we have to process
let count = db_event_count(conn)?;
let update_each_percent = 0.05;
let mut percent_done = 0.0;
let mut events_processed = 0;
let start = Instant::now();
let tx = conn.transaction()?;
{
// Clear out table
tx.execute("DELETE FROM tag;", [])?;
let mut stmt = tx.prepare("select id, content from event order by id;")?;
let mut tag_rows = stmt.query([])?;
while let Some(row) = tag_rows.next()? {
if (events_processed as f32)/(count as f32) > percent_done {
info!("Tag update {}% complete...", (100.0*percent_done).round());
percent_done += update_each_percent;
}
// we want to capture the event_id that had the tag, the tag name, and the tag hex value.
let event_id: u64 = row.get(0)?;
let event_json: String = row.get(1)?;
let event: Event = serde_json::from_str(&event_json)?;
// look at each event, and each tag, creating new tag entries if appropriate.
for t in event.tags.iter().filter(|x| x.len() > 1) {
let tagname = t.get(0).unwrap();
let tagnamechar_opt = single_char_tagname(tagname);
if tagnamechar_opt.is_none() {
continue;
}
// safe because len was > 1
let tagval = t.get(1).unwrap();
// insert as BLOB if we can restore it losslessly.
// this means it needs to be even length and lowercase.
if (tagval.len() % 2 == 0) && is_lower_hex(tagval) {
tx.execute(
"INSERT INTO tag (event_id, name, value_hex) VALUES (?1, ?2, ?3);",
params![event_id, tagname, hex::decode(tagval).ok()],
)?;
} else {
// otherwise, insert as text
tx.execute(
"INSERT INTO tag (event_id, name, value) VALUES (?1, ?2, ?3);",
params![event_id, tagname, &tagval],
)?;
}
}
events_processed += 1;
}
}
tx.commit()?;
info!("rebuilt tags in {:?}", start.elapsed());
Ok(())
}
//// Migration Scripts
fn mig_1_to_2(conn: &mut PooledConnection) -> Result<usize> {
// only change is adding a hidden column to events.
let upgrade_sql = r##"
ALTER TABLE event ADD hidden INTEGER;
UPDATE event SET hidden=FALSE;
PRAGMA user_version = 2;
"##;
match conn.execute_batch(upgrade_sql) {
Ok(()) => {
info!("database schema upgraded v1 -> v2");
}
Err(err) => {
error!("update failed: {}", err);
panic!("database could not be upgraded");
}
}
Ok(2)
}
fn mig_2_to_3(conn: &mut PooledConnection) -> Result<usize> {
// this version lacks the tag column
info!("database schema needs update from 2->3");
let upgrade_sql = r##"
CREATE TABLE IF NOT EXISTS tag (
id INTEGER PRIMARY KEY,
event_id INTEGER NOT NULL, -- an event ID that contains a tag.
name TEXT, -- the tag name ("p", "e", whatever)
value TEXT, -- the tag value, if not hex.
value_hex BLOB, -- the tag value, if it can be interpreted as a hex string.
FOREIGN KEY(event_id) REFERENCES event(id) ON UPDATE CASCADE ON DELETE CASCADE
);
PRAGMA user_version = 3;
"##;
// TODO: load existing refs into tag table
match conn.execute_batch(upgrade_sql) {
Ok(()) => {
info!("database schema upgraded v2 -> v3");
}
Err(err) => {
error!("update failed: {}", err);
panic!("database could not be upgraded");
}
}
// iterate over every event/pubkey tag
let tx = conn.transaction()?;
{
let mut stmt = tx.prepare("select event_id, \"e\", lower(hex(referenced_event)) from event_ref union select event_id, \"p\", lower(hex(referenced_pubkey)) from pubkey_ref;")?;
let mut tag_rows = stmt.query([])?;
while let Some(row) = tag_rows.next()? {
// we want to capture the event_id that had the tag, the tag name, and the tag hex value.
let event_id: u64 = row.get(0)?;
let tag_name: String = row.get(1)?;
let tag_value: String = row.get(2)?;
// this will leave behind p/e tags that were non-hex, but they are invalid anyways.
if is_lower_hex(&tag_value) {
tx.execute(
"INSERT INTO tag (event_id, name, value_hex) VALUES (?1, ?2, ?3);",
params![event_id, tag_name, hex::decode(&tag_value).ok()],
)?;
}
}
}
info!("Updated tag values");
tx.commit()?;
Ok(3)
}
fn mig_3_to_4(conn: &mut PooledConnection) -> Result<usize> {
info!("database schema needs update from 3->4");
let upgrade_sql = r##"
-- incoming metadata events with nip05
CREATE TABLE IF NOT EXISTS user_verification (
id INTEGER PRIMARY KEY,
metadata_event INTEGER NOT NULL, -- the metadata event used for this validation.
name TEXT NOT NULL, -- the nip05 field value (user@domain).
verified_at INTEGER, -- timestamp this author/nip05 was most recently verified.
failed_at INTEGER, -- timestamp a verification attempt failed (host down).
failure_count INTEGER DEFAULT 0, -- number of consecutive failures.
FOREIGN KEY(metadata_event) REFERENCES event(id) ON UPDATE CASCADE ON DELETE CASCADE
);
CREATE INDEX IF NOT EXISTS user_verification_name_index ON user_verification(name);
CREATE INDEX IF NOT EXISTS user_verification_event_index ON user_verification(metadata_event);
PRAGMA user_version = 4;
"##;
match conn.execute_batch(upgrade_sql) {
Ok(()) => {
info!("database schema upgraded v3 -> v4");
}
Err(err) => {
error!("update failed: {}", err);
panic!("database could not be upgraded");
}
}
Ok(4)
}
fn mig_4_to_5(conn: &mut PooledConnection) -> Result<usize> {
info!("database schema needs update from 4->5");
let upgrade_sql = r##"
DROP TABLE IF EXISTS event_ref;
DROP TABLE IF EXISTS pubkey_ref;
PRAGMA user_version=5;
"##;
match conn.execute_batch(upgrade_sql) {
Ok(()) => {
info!("database schema upgraded v4 -> v5");
}
Err(err) => {
error!("update failed: {}", err);
panic!("database could not be upgraded");
}
}
Ok(5)
}
fn mig_5_to_6(conn: &mut PooledConnection) -> Result<usize> {
info!("database schema needs update from 5->6");
// We need to rebuild the tags table. iterate through the
// event table. build event from json, insert tags into a
// fresh tag table. This was needed due to a logic error in
// how hex-like tags got indexed.
let start = Instant::now();
let tx = conn.transaction()?;
{
// Clear out table
tx.execute("DELETE FROM tag;", [])?;
let mut stmt = tx.prepare("select id, content from event order by id;")?;
let mut tag_rows = stmt.query([])?;
while let Some(row) = tag_rows.next()? {
let event_id: u64 = row.get(0)?;
let event_json: String = row.get(1)?;
let event: Event = serde_json::from_str(&event_json)?;
// look at each event, and each tag, creating new tag entries if appropriate.
for t in event.tags.iter().filter(|x| x.len() > 1) {
let tagname = t.get(0).unwrap();
let tagnamechar_opt = single_char_tagname(tagname);
if tagnamechar_opt.is_none() {
continue;
}
// safe because len was > 1
let tagval = t.get(1).unwrap();
// insert as BLOB if we can restore it losslessly.
// this means it needs to be even length and lowercase.
if (tagval.len() % 2 == 0) && is_lower_hex(tagval) {
tx.execute(
"INSERT INTO tag (event_id, name, value_hex) VALUES (?1, ?2, ?3);",
params![event_id, tagname, hex::decode(tagval).ok()],
)?;
} else {
// otherwise, insert as text
tx.execute(
"INSERT INTO tag (event_id, name, value) VALUES (?1, ?2, ?3);",
params![event_id, tagname, &tagval],
)?;
}
}
}
tx.execute("PRAGMA user_version = 6;", [])?;
}
tx.commit()?;
info!("database schema upgraded v5 -> v6 in {:?}", start.elapsed());
// vacuum after large table modification
let start = Instant::now();
conn.execute("VACUUM;", [])?;
info!("vacuumed DB after tags rebuild in {:?}", start.elapsed());
Ok(6)
}
fn mig_6_to_7(conn: &mut PooledConnection) -> Result<usize> {
info!("database schema needs update from 6->7");
let upgrade_sql = r##"
ALTER TABLE event ADD delegated_by BLOB;
CREATE INDEX IF NOT EXISTS delegated_by_index ON event(delegated_by);
PRAGMA user_version = 7;
"##;
match conn.execute_batch(upgrade_sql) {
Ok(()) => {
info!("database schema upgraded v6 -> v7");
}
Err(err) => {
error!("update failed: {}", err);
panic!("database could not be upgraded");
}
}
Ok(7)
}
fn mig_7_to_8(conn: &mut PooledConnection) -> Result<usize> {
info!("database schema needs update from 7->8");
// Remove redundant indexes, and add a better multi-column index.
let upgrade_sql = r##"
DROP INDEX IF EXISTS created_at_index;
DROP INDEX IF EXISTS kind_index;
CREATE INDEX IF NOT EXISTS event_composite_index ON event(kind,created_at);
PRAGMA user_version = 8;
"##;
match conn.execute_batch(upgrade_sql) {
Ok(()) => {
info!("database schema upgraded v7 -> v8");
}
Err(err) => {
error!("update failed: {}", err);
panic!("database could not be upgraded");
}
}
Ok(8)
}
fn mig_8_to_9(conn: &mut PooledConnection) -> Result<usize> {
info!("database schema needs update from 8->9");
// Those old indexes were actually helpful...
let upgrade_sql = r##"
CREATE INDEX IF NOT EXISTS created_at_index ON event(created_at);
CREATE INDEX IF NOT EXISTS event_composite_index ON event(kind,created_at);
PRAGMA user_version = 9;
"##;
match conn.execute_batch(upgrade_sql) {
Ok(()) => {
info!("database schema upgraded v8 -> v9");
}
Err(err) => {
error!("update failed: {}", err);
panic!("database could not be upgraded");
}
}
Ok(9)
}
fn mig_9_to_10(conn: &mut PooledConnection) -> Result<usize> {
info!("database schema needs update from 9->10");
// Those old indexes were actually helpful...
let upgrade_sql = r##"
CREATE INDEX IF NOT EXISTS tag_composite_index ON tag(event_id,name,value_hex,value);
PRAGMA user_version = 10;
"##;
match conn.execute_batch(upgrade_sql) {
Ok(()) => {
info!("database schema upgraded v9 -> v10");
}
Err(err) => {
error!("update failed: {}", err);
panic!("database could not be upgraded");
}
}
Ok(10)
}
fn mig_10_to_11(conn: &mut PooledConnection) -> Result<usize> {
info!("database schema needs update from 10->11");
// Those old indexes were actually helpful...
let upgrade_sql = r##"
CREATE INDEX IF NOT EXISTS tag_name_eid_index ON tag(name,event_id,value_hex);
reindex;
pragma optimize;
PRAGMA user_version = 11;
"##;
match conn.execute_batch(upgrade_sql) {
Ok(()) => {
info!("database schema upgraded v10 -> v11");
}
Err(err) => {
error!("update failed: {}", err);
panic!("database could not be upgraded");
}
}
Ok(11)
}
fn mig_11_to_12(conn: &mut PooledConnection) -> Result<usize> {
info!("database schema needs update from 11->12");
let start = Instant::now();
let tx = conn.transaction()?;
{
// Lookup every replaceable event
let mut stmt = tx.prepare("select kind,author from event where kind in (0,3,41) or (kind>=10000 and kind<20000) order by id;")?;
let mut replaceable_rows = stmt.query([])?;
info!("updating replaceable events; this could take awhile...");
while let Some(row) = replaceable_rows.next()? {
// we want to capture the event_id that had the tag, the tag name, and the tag hex value.
let event_kind: u64 = row.get(0)?;
let event_author: Vec<u8> = row.get(1)?;
tx.execute(
"UPDATE event SET hidden=TRUE WHERE hidden!=TRUE and kind=? and author=? and id NOT IN (SELECT id FROM event WHERE kind=? AND author=? ORDER BY created_at DESC LIMIT 1)",
params![event_kind, event_author, event_kind, event_author],
)?;
}
tx.execute("PRAGMA user_version = 12;", [])?;
}
tx.commit()?;
info!("database schema upgraded v11 -> v12 in {:?}", start.elapsed());
// vacuum after large table modification
let start = Instant::now();
conn.execute("VACUUM;", [])?;
info!("vacuumed DB after hidden event cleanup in {:?}", start.elapsed());
Ok(12)
}
fn mig_12_to_13(conn: &mut PooledConnection) -> Result<usize> {
info!("database schema needs update from 12->13");
let upgrade_sql = r##"
CREATE INDEX IF NOT EXISTS kind_author_index ON event(kind,author);
reindex;
pragma optimize;
PRAGMA user_version = 13;
"##;
match conn.execute_batch(upgrade_sql) {
Ok(()) => {
info!("database schema upgraded v12 -> v13");
}
Err(err) => {
error!("update failed: {}", err);
panic!("database could not be upgraded");
}
}
Ok(13)
}
fn mig_13_to_14(conn: &mut PooledConnection) -> Result<usize> {
info!("database schema needs update from 13->14");
let upgrade_sql = r##"
CREATE INDEX IF NOT EXISTS kind_index ON event(kind);
CREATE INDEX IF NOT EXISTS kind_created_at_index ON event(kind,created_at);
pragma optimize;
PRAGMA user_version = 14;
"##;
match conn.execute_batch(upgrade_sql) {
Ok(()) => {
info!("database schema upgraded v13 -> v14");
}
Err(err) => {
error!("update failed: {}", err);
panic!("database could not be upgraded");
}
}
Ok(14)
}
fn mig_14_to_15(conn: &mut PooledConnection) -> Result<usize> {
info!("database schema needs update from 14->15");
let upgrade_sql = r##"
CREATE INDEX IF NOT EXISTS author_created_at_index ON event(author,created_at);
CREATE INDEX IF NOT EXISTS author_kind_index ON event(author,kind);
PRAGMA user_version = 15;
"##;
match conn.execute_batch(upgrade_sql) {
Ok(()) => {
info!("database schema upgraded v14 -> v15");
}
Err(err) => {
error!("update failed: {}", err);
panic!("database could not be upgraded");
}
}
// clear out hidden events
let clear_hidden_sql = r##"DELETE FROM event WHERE HIDDEN=true;"##;
info!("removing hidden events; this may take awhile...");
match conn.execute_batch(clear_hidden_sql) {
Ok(()) => {
info!("all hidden events removed");
},
Err(err) => {
error!("delete failed: {}", err);
panic!("could not remove hidden events");
}
}
Ok(15)
}
fn mig_15_to_16(conn: &mut PooledConnection) -> Result<usize> {
let count = db_event_count(conn)?;
info!("database schema needs update from 15->16");
let upgrade_sql = r##"
DROP TABLE tag;
CREATE TABLE tag (
id INTEGER PRIMARY KEY,
event_id INTEGER NOT NULL, -- an event ID that contains a tag.
name TEXT, -- the tag name ("p", "e", whatever)
value TEXT, -- the tag value, if not hex.
created_at INTEGER NOT NULL, -- when the event was authored
kind INTEGER NOT NULL, -- event kind
FOREIGN KEY(event_id) REFERENCES event(id) ON UPDATE CASCADE ON DELETE CASCADE
);
CREATE INDEX IF NOT EXISTS tag_val_index ON tag(value);
CREATE INDEX IF NOT EXISTS tag_composite_index ON tag(event_id,name,value);
CREATE INDEX IF NOT EXISTS tag_name_eid_index ON tag(name,event_id,value);
CREATE INDEX IF NOT EXISTS tag_covering_index ON tag(name,kind,value,created_at,event_id);
"##;
let start = Instant::now();
let tx = conn.transaction()?;
let bar = ProgressBar::new(count.try_into().unwrap())
.with_message("rebuilding tags table");
bar.set_style(
ProgressStyle::with_template(
"[{elapsed_precise}] {bar:40.white/blue} {pos:>7}/{len:7} [{percent}%] {msg}",
)
.unwrap(),
);
{
tx.execute_batch(upgrade_sql)?;
let mut stmt = tx.prepare("select id, kind, created_at, content from event order by id;")?;
let mut tag_rows = stmt.query([])?;
let mut count = 0;
while let Some(row) = tag_rows.next()? {
count += 1;
if count%10==0 {
bar.inc(10);
}
let event_id: u64 = row.get(0)?;
let kind: u64 = row.get(1)?;
let created_at: u64 = row.get(2)?;
let event_json: String = row.get(3)?;
let event: Event = serde_json::from_str(&event_json)?;
// look at each event, and each tag, creating new tag entries if appropriate.
for t in event.tags.iter().filter(|x| x.len() > 1) {
let tagname = t.get(0).unwrap();
let tagnamechar_opt = single_char_tagname(tagname);
if tagnamechar_opt.is_none() {
continue;
}
// safe because len was > 1
let tagval = t.get(1).unwrap();
// otherwise, insert as text
tx.execute(
"INSERT INTO tag (event_id, name, value, kind, created_at) VALUES (?1, ?2, ?3, ?4, ?5);",
params![event_id, tagname, &tagval, kind, created_at],
)?;
}
}
tx.execute("PRAGMA user_version = 16;", [])?;
}
bar.finish();
tx.commit()?;
info!("database schema upgraded v15 -> v16 in {:?}", start.elapsed());
Ok(16)
}