82 lines
2.6 KiB
Go
82 lines
2.6 KiB
Go
// VulcanizeDB
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// Copyright © 2021 Vulcanize
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package sql
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import (
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"context"
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"io"
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"github.com/cerc-io/plugeth-statediff/indexer/database/metrics"
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)
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// Database interfaces required by the sql indexer
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type Database interface {
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Driver
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Statements
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}
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// Driver interface has all the methods required by a driver implementation to support the sql indexer
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type Driver interface {
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UseCopyFrom() bool
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QueryRow(ctx context.Context, sql string, args ...interface{}) ScannableRow
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Exec(ctx context.Context, sql string, args ...interface{}) (Result, error)
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Select(ctx context.Context, dest interface{}, query string, args ...interface{}) error
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Get(ctx context.Context, dest interface{}, query string, args ...interface{}) error
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Begin(ctx context.Context) (Tx, error)
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Stats() metrics.DbStats
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NodeID() string
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Context() context.Context
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io.Closer
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}
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// Statements interface to accommodate different SQL query syntax
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type Statements interface {
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DetectGapsStm() string
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MaxHeaderStm() string
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ExistsHeaderStm() string
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InsertHeaderStm() string
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SetCanonicalHeaderStm() string
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InsertUncleStm() string
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InsertTxStm() string
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InsertRctStm() string
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InsertLogStm() string
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InsertWithdrawalStm() string
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InsertStateStm() string
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InsertStorageStm() string
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InsertIPLDStm() string
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InsertIPLDsStm() string
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}
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// Tx interface to accommodate different concrete SQL transaction types
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type Tx interface {
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QueryRow(ctx context.Context, sql string, args ...interface{}) ScannableRow
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Exec(ctx context.Context, sql string, args ...interface{}) (Result, error)
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CopyFrom(ctx context.Context, tableName []string, columnNames []string, rows [][]interface{}) (int64, error)
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Commit(ctx context.Context) error
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Rollback(ctx context.Context) error
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}
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// ScannableRow interface to accommodate different concrete row types
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type ScannableRow interface {
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Scan(dest ...interface{}) error
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}
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// Result interface to accommodate different concrete result types
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type Result interface {
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RowsAffected() (int64, error)
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}
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