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https://github.com/hoernschen/dendrite.git
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72285b2659
Sister PR to https://github.com/matrix-org/gomatrixserverlib/pull/364 Read this commit by commit to avoid going insane.
81 lines
2.6 KiB
Go
81 lines
2.6 KiB
Go
package deltas
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import (
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"context"
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"database/sql"
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"fmt"
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"github.com/lib/pq"
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"github.com/matrix-org/gomatrixserverlib/spec"
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)
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var serverNamesTables = []string{
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"userapi_accounts",
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"userapi_account_datas",
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"userapi_devices",
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"userapi_notifications",
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"userapi_openid_tokens",
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"userapi_profiles",
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"userapi_pushers",
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"userapi_threepids",
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}
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// These tables have a PRIMARY KEY constraint which we need to drop so
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// that we can recreate a new unique index that contains the server name.
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// If the new key doesn't exist (i.e. the database was created before the
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// table rename migration) we'll try to drop the old one instead.
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var serverNamesDropPK = map[string]string{
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"userapi_accounts": "account_accounts",
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"userapi_account_datas": "account_data",
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"userapi_profiles": "account_profiles",
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}
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// These indices are out of date so let's drop them. They will get recreated
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// automatically.
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var serverNamesDropIndex = []string{
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"userapi_pusher_localpart_idx",
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"userapi_pusher_app_id_pushkey_localpart_idx",
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}
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// I know what you're thinking: you're wondering "why doesn't this use $1
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// and pass variadic parameters to ExecContext?" — the answer is because
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// PostgreSQL doesn't expect the table name to be specified as a substituted
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// argument in that way so it results in a syntax error in the query.
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func UpServerNames(ctx context.Context, tx *sql.Tx, serverName spec.ServerName) error {
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for _, table := range serverNamesTables {
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q := fmt.Sprintf(
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"ALTER TABLE IF EXISTS %s ADD COLUMN IF NOT EXISTS server_name TEXT NOT NULL DEFAULT '';",
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pq.QuoteIdentifier(table),
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)
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if _, err := tx.ExecContext(ctx, q); err != nil {
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return fmt.Errorf("add server name to %q error: %w", table, err)
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}
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}
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for newTable, oldTable := range serverNamesDropPK {
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q := fmt.Sprintf(
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"ALTER TABLE IF EXISTS %s DROP CONSTRAINT IF EXISTS %s;",
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pq.QuoteIdentifier(newTable), pq.QuoteIdentifier(newTable+"_pkey"),
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)
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if _, err := tx.ExecContext(ctx, q); err != nil {
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return fmt.Errorf("drop new PK from %q error: %w", newTable, err)
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}
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q = fmt.Sprintf(
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"ALTER TABLE IF EXISTS %s DROP CONSTRAINT IF EXISTS %s;",
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pq.QuoteIdentifier(newTable), pq.QuoteIdentifier(oldTable+"_pkey"),
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)
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if _, err := tx.ExecContext(ctx, q); err != nil {
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return fmt.Errorf("drop old PK from %q error: %w", newTable, err)
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}
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}
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for _, index := range serverNamesDropIndex {
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q := fmt.Sprintf(
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"DROP INDEX IF EXISTS %s;",
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pq.QuoteIdentifier(index),
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)
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if _, err := tx.ExecContext(ctx, q); err != nil {
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return fmt.Errorf("drop index %q error: %w", index, err)
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}
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}
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return nil
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}
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