forked from sqls-server/sqls
/
sqlite3.go
172 lines (153 loc) · 3.89 KB
/
sqlite3.go
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package database
import (
"context"
"database/sql"
"fmt"
"log"
"github.com/mikeismert/sqls/dialect"
_ "github.com/mattn/go-sqlite3"
)
func init() {
RegisterOpen(dialect.DatabaseDriverSQLite3, sqlite3Open)
RegisterFactory(dialect.DatabaseDriverSQLite3, NewSQLite3DBRepository)
}
func sqlite3Open(connCfg *DBConfig) (*DBConnection, error) {
conn, err := sql.Open("sqlite3", connCfg.DataSourceName)
if err != nil {
return nil, err
}
conn.SetMaxIdleConns(DefaultMaxIdleConns)
conn.SetMaxOpenConns(DefaultMaxOpenConns)
return &DBConnection{
Conn: conn,
}, nil
}
type SQLite3DBRepository struct {
Conn *sql.DB
}
func NewSQLite3DBRepository(conn *sql.DB) DBRepository {
return &SQLite3DBRepository{Conn: conn}
}
func (db *SQLite3DBRepository) Driver() dialect.DatabaseDriver {
return dialect.DatabaseDriverSQLite3
}
func (db *SQLite3DBRepository) CurrentDatabase(ctx context.Context) (string, error) {
return "", nil
}
func (db *SQLite3DBRepository) Databases(ctx context.Context) ([]string, error) {
return []string{}, nil
}
func (db *SQLite3DBRepository) CurrentSchema(ctx context.Context) (string, error) {
return db.CurrentDatabase(ctx)
}
func (db *SQLite3DBRepository) Schemas(ctx context.Context) ([]string, error) {
return db.Databases(ctx)
}
func (db *SQLite3DBRepository) SchemaTables(ctx context.Context) (map[string][]string, error) {
tables, err := db.Tables(ctx)
if err != nil {
return nil, err
}
return map[string][]string{"": tables}, nil
}
func (db *SQLite3DBRepository) Tables(ctx context.Context) ([]string, error) {
rows, err := db.Conn.QueryContext(ctx, `
SELECT
name
FROM
sqlite_master
WHERE
type = 'table'
ORDER BY
name
`)
if err != nil {
log.Fatal(err)
}
defer rows.Close()
tables := []string{}
for rows.Next() {
var table string
if err := rows.Scan(&table); err != nil {
return nil, err
}
tables = append(tables, table)
}
return tables, nil
}
func (db *SQLite3DBRepository) describeTable(ctx context.Context, tableName string) ([]*ColumnDesc, error) {
rows, err := db.Conn.QueryContext(ctx, fmt.Sprintf("PRAGMA table_info(%s);", tableName))
if err != nil {
log.Fatal(err)
}
defer rows.Close()
tableInfos := []*ColumnDesc{}
for rows.Next() {
var id int
var nonnull int
var tableInfo ColumnDesc
err := rows.Scan(
&id,
&tableInfo.Name,
&tableInfo.Type,
&nonnull,
&tableInfo.Default,
&tableInfo.Key,
)
if err != nil {
return nil, err
}
tableInfo.Table = tableName
if nonnull != 0 {
tableInfo.Null = "NO"
} else {
tableInfo.Null = "YES"
}
tableInfos = append(tableInfos, &tableInfo)
}
return tableInfos, nil
}
func (db *SQLite3DBRepository) DescribeDatabaseTable(ctx context.Context) ([]*ColumnDesc, error) {
tables, err := db.Tables(ctx)
if err != nil {
return nil, err
}
all := []*ColumnDesc{}
for _, table := range tables {
descs, err := db.describeTable(ctx, table)
if err != nil {
return nil, err
}
all = append(all, descs...)
}
return all, nil
}
func (db *SQLite3DBRepository) DescribeDatabaseTableBySchema(ctx context.Context, _ string) ([]*ColumnDesc, error) {
return db.DescribeDatabaseTable(ctx)
}
func (db *SQLite3DBRepository) DescribeForeignKeysBySchema(ctx context.Context, schemaName string) ([]*ForeignKey, error) {
rows, err := db.Conn.QueryContext(
ctx,
`
SELECT m.name || p."id",
m.name,
p."from",
p."table",
p."to"
FROM sqlite_master m
JOIN pragma_foreign_key_list(m.name) p ON m.name != p."table"
WHERE m.type = 'table'
ORDER BY 1, p."seq"
`)
if err != nil {
log.Fatal(err)
}
defer func() { _ = rows.Close() }()
return parseForeignKeys(rows, schemaName)
}
func (db *SQLite3DBRepository) Exec(ctx context.Context, query string) (sql.Result, error) {
return db.Conn.ExecContext(ctx, query)
}
func (db *SQLite3DBRepository) Query(ctx context.Context, query string) (*sql.Rows, error) {
return db.Conn.QueryContext(ctx, query)
}