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Beego/orm/db_sqlite.go
2013-08-27 12:33:27 +08:00

121 lines
2.8 KiB
Go

package orm
import (
"database/sql"
"fmt"
)
var sqliteOperators = map[string]string{
"exact": "= ?",
"iexact": "LIKE ? ESCAPE '\\'",
"contains": "LIKE ? ESCAPE '\\'",
"icontains": "LIKE ? ESCAPE '\\'",
"gt": "> ?",
"gte": ">= ?",
"lt": "< ?",
"lte": "<= ?",
"startswith": "LIKE ? ESCAPE '\\'",
"endswith": "LIKE ? ESCAPE '\\'",
"istartswith": "LIKE ? ESCAPE '\\'",
"iendswith": "LIKE ? ESCAPE '\\'",
}
var sqliteTypes = map[string]string{
"auto": "integer NOT NULL PRIMARY KEY AUTOINCREMENT",
"pk": "NOT NULL PRIMARY KEY",
"bool": "bool",
"string": "varchar(%d)",
"string-text": "text",
"time.Time-date": "date",
"time.Time": "datetime",
"int8": "tinyint",
"int16": "smallint",
"int32": "integer",
"int64": "bigint",
"uint8": "tinyint unsigned",
"uint16": "smallint unsigned",
"uint32": "integer unsigned",
"uint64": "bigint unsigned",
"float64": "real",
"float64-decimal": "decimal",
}
type dbBaseSqlite struct {
dbBase
}
var _ dbBaser = new(dbBaseSqlite)
func (d *dbBaseSqlite) OperatorSql(operator string) string {
return sqliteOperators[operator]
}
func (d *dbBaseSqlite) GenerateOperatorLeftCol(fi *fieldInfo, operator string, leftCol *string) {
if fi.fieldType == TypeDateField {
*leftCol = fmt.Sprintf("DATE(%s)", *leftCol)
}
}
func (d *dbBaseSqlite) SupportUpdateJoin() bool {
return false
}
func (d *dbBaseSqlite) MaxLimit() uint64 {
return 9223372036854775807
}
func (d *dbBaseSqlite) DbTypes() map[string]string {
return sqliteTypes
}
func (d *dbBaseSqlite) ShowTablesQuery() string {
return "SELECT name FROM sqlite_master WHERE type = 'table'"
}
func (d *dbBaseSqlite) GetColumns(db dbQuerier, table string) (map[string][3]string, error) {
query := d.ins.ShowColumnsQuery(table)
rows, err := db.Query(query)
if err != nil {
return nil, err
}
columns := make(map[string][3]string)
for rows.Next() {
var tmp, name, typ, null sql.NullString
err := rows.Scan(&tmp, &name, &typ, &null, &tmp, &tmp)
if err != nil {
return nil, err
}
columns[name.String] = [3]string{name.String, typ.String, null.String}
}
return columns, nil
}
func (d *dbBaseSqlite) ShowColumnsQuery(table string) string {
return fmt.Sprintf("pragma table_info('%s')", table)
}
func (d *dbBaseSqlite) IndexExists(db dbQuerier, table string, name string) bool {
query := fmt.Sprintf("PRAGMA index_list('%s')", table)
rows, err := db.Query(query)
if err != nil {
panic(err)
}
defer rows.Close()
for rows.Next() {
var tmp, index sql.NullString
rows.Scan(&tmp, &index, &tmp)
if name == index.String {
return true
}
}
return false
}
func newdbBaseSqlite() dbBaser {
b := new(dbBaseSqlite)
b.ins = b
return b
}