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141 lines
3.5 KiB
Go
141 lines
3.5 KiB
Go
// Beego (http://beego.me/)
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// @description beego is an open-source, high-performance web framework for the Go programming language.
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// @link http://github.com/astaxie/beego for the canonical source repository
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// @license http://github.com/astaxie/beego/blob/master/LICENSE
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// @authors slene
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package orm
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import (
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"database/sql"
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"fmt"
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)
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// sqlite operators.
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var sqliteOperators = map[string]string{
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"exact": "= ?",
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"iexact": "LIKE ? ESCAPE '\\'",
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"contains": "LIKE ? ESCAPE '\\'",
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"icontains": "LIKE ? ESCAPE '\\'",
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"gt": "> ?",
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"gte": ">= ?",
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"lt": "< ?",
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"lte": "<= ?",
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"startswith": "LIKE ? ESCAPE '\\'",
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"endswith": "LIKE ? ESCAPE '\\'",
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"istartswith": "LIKE ? ESCAPE '\\'",
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"iendswith": "LIKE ? ESCAPE '\\'",
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}
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// sqlite column types.
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var sqliteTypes = map[string]string{
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"auto": "integer NOT NULL PRIMARY KEY AUTOINCREMENT",
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"pk": "NOT NULL PRIMARY KEY",
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"bool": "bool",
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"string": "varchar(%d)",
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"string-text": "text",
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"time.Time-date": "date",
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"time.Time": "datetime",
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"int8": "tinyint",
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"int16": "smallint",
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"int32": "integer",
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"int64": "bigint",
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"uint8": "tinyint unsigned",
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"uint16": "smallint unsigned",
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"uint32": "integer unsigned",
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"uint64": "bigint unsigned",
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"float64": "real",
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"float64-decimal": "decimal",
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}
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// sqlite dbBaser.
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type dbBaseSqlite struct {
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dbBase
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}
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var _ dbBaser = new(dbBaseSqlite)
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// get sqlite operator.
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func (d *dbBaseSqlite) OperatorSql(operator string) string {
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return sqliteOperators[operator]
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}
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// generate functioned sql for sqlite.
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// only support DATE(text).
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func (d *dbBaseSqlite) GenerateOperatorLeftCol(fi *fieldInfo, operator string, leftCol *string) {
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if fi.fieldType == TypeDateField {
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*leftCol = fmt.Sprintf("DATE(%s)", *leftCol)
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}
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}
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// unable updating joined record in sqlite.
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func (d *dbBaseSqlite) SupportUpdateJoin() bool {
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return false
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}
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// max int in sqlite.
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func (d *dbBaseSqlite) MaxLimit() uint64 {
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return 9223372036854775807
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}
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// get column types in sqlite.
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func (d *dbBaseSqlite) DbTypes() map[string]string {
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return sqliteTypes
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}
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// get show tables sql in sqlite.
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func (d *dbBaseSqlite) ShowTablesQuery() string {
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return "SELECT name FROM sqlite_master WHERE type = 'table'"
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}
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// get columns in sqlite.
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func (d *dbBaseSqlite) GetColumns(db dbQuerier, table string) (map[string][3]string, error) {
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query := d.ins.ShowColumnsQuery(table)
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rows, err := db.Query(query)
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if err != nil {
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return nil, err
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}
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columns := make(map[string][3]string)
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for rows.Next() {
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var tmp, name, typ, null sql.NullString
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err := rows.Scan(&tmp, &name, &typ, &null, &tmp, &tmp)
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if err != nil {
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return nil, err
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}
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columns[name.String] = [3]string{name.String, typ.String, null.String}
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}
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return columns, nil
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}
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// get show columns sql in sqlite.
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func (d *dbBaseSqlite) ShowColumnsQuery(table string) string {
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return fmt.Sprintf("pragma table_info('%s')", table)
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}
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// check index exist in sqlite.
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func (d *dbBaseSqlite) IndexExists(db dbQuerier, table string, name string) bool {
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query := fmt.Sprintf("PRAGMA index_list('%s')", table)
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rows, err := db.Query(query)
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if err != nil {
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panic(err)
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}
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defer rows.Close()
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for rows.Next() {
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var tmp, index sql.NullString
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rows.Scan(&tmp, &index, &tmp)
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if name == index.String {
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return true
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}
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}
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return false
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}
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// create new sqlite dbBaser.
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func newdbBaseSqlite() dbBaser {
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b := new(dbBaseSqlite)
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b.ins = b
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return b
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}
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