plugeth-statediff/indexer/database/sql/interfaces.go

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