79 lines
1.7 KiB
Go
79 lines
1.7 KiB
Go
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// Copyright (C) 2019 Storj Labs, Inc.
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// See LICENSE for copying information.
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package sqliteutil
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import (
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"database/sql"
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"strconv"
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"github.com/zeebo/errs"
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"storj.io/storj/internal/dbutil/dbschema"
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)
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// LoadSchemaFromSQL inserts script into connstr and loads schema.
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func LoadSchemaFromSQL(script string) (_ *dbschema.Schema, err error) {
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db, err := sql.Open("sqlite3", ":memory:")
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if err != nil {
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return nil, err
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}
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defer func() { err = errs.Combine(err, db.Close()) }()
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_, err = db.Exec(script)
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if err != nil {
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return nil, err
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}
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return QuerySchema(db)
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}
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// LoadSnapshotFromSQL inserts script into connstr and loads schema.
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func LoadSnapshotFromSQL(script string) (_ *dbschema.Snapshot, err error) {
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db, err := sql.Open("sqlite3", ":memory:")
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if err != nil {
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return nil, err
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}
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defer func() { err = errs.Combine(err, db.Close()) }()
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_, err = db.Exec(script)
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if err != nil {
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return nil, err
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}
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snapshot, err := QuerySnapshot(db)
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if err != nil {
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return nil, err
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}
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snapshot.Script = script
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return snapshot, nil
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}
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// QuerySnapshot loads snapshot from database
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func QuerySnapshot(db dbschema.Queryer) (*dbschema.Snapshot, error) {
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schema, err := QuerySchema(db)
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if err != nil {
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return nil, err
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}
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data, err := QueryData(db, schema)
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if err != nil {
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return nil, err
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}
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return &dbschema.Snapshot{
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Version: -1,
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Schema: schema,
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Data: data,
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}, err
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}
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// QueryData loads all data from tables
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func QueryData(db dbschema.Queryer, schema *dbschema.Schema) (*dbschema.Data, error) {
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return dbschema.QueryData(db, schema, func(columnName string) string {
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quoted := strconv.Quote(columnName)
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return `quote(` + quoted + `) as ` + quoted
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})
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}
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