mirror of https://github.com/go-gorm/gorm.git
86 lines
2.3 KiB
Go
86 lines
2.3 KiB
Go
package gorm
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import (
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"fmt"
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"reflect"
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)
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type sqlite3 struct{}
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func (s *sqlite3) BinVar(i int) string {
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return "$$" // ?
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}
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func (s *sqlite3) SupportLastInsertId() bool {
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return true
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}
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func (s *sqlite3) HasTop() bool {
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return false
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}
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func (s *sqlite3) SqlTag(value reflect.Value, size int) string {
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switch value.Kind() {
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case reflect.Bool:
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return "bool"
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case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uintptr:
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return "integer"
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case reflect.Int64, reflect.Uint64:
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return "bigint"
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case reflect.Float32, reflect.Float64:
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return "real"
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case reflect.String:
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if size > 0 && size < 65532 {
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return fmt.Sprintf("varchar(%d)", size)
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} else {
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return "text"
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}
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case reflect.Struct:
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if value.Type() == timeType {
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return "datetime"
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}
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default:
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if _, ok := value.Interface().([]byte); ok {
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return "blob"
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}
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}
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panic(fmt.Sprintf("invalid sql type %s (%s) for sqlite3", value.Type().Name(), value.Kind().String()))
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}
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func (s *sqlite3) PrimaryKeyTag(value reflect.Value, size int) string {
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switch value.Kind() {
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case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uintptr, reflect.Int64, reflect.Uint64:
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return "INTEGER PRIMARY KEY"
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default:
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panic("Invalid primary key type")
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}
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}
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func (s *sqlite3) ReturningStr(tableName, key string) string {
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return ""
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}
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func (s *sqlite3) SelectFromDummyTable() string {
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return ""
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}
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func (s *sqlite3) Quote(key string) string {
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return fmt.Sprintf("\"%s\"", key)
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}
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func (s *sqlite3) HasTable(scope *Scope, tableName string) bool {
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var count int
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scope.DB().QueryRow(fmt.Sprintf("SELECT count(*) FROM sqlite_master WHERE type='table' AND name='%v';", tableName)).Scan(&count)
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return count > 0
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}
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func (s *sqlite3) HasColumn(scope *Scope, tableName string, columnName string) bool {
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var count int
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scope.DB().QueryRow(fmt.Sprintf("SELECT count(*) FROM sqlite_master WHERE tbl_name = '%v' AND (sql LIKE '%%(\"%v\" %%' OR sql LIKE '%%,\"%v\" %%' OR sql LIKE '%%( %v %%' OR sql LIKE '%%, %v %%');\n", tableName, columnName, columnName, columnName, columnName)).Scan(&count)
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return count > 0
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}
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func (s *sqlite3) RemoveIndex(scope *Scope, indexName string) {
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scope.Raw(fmt.Sprintf("DROP INDEX %v", indexName)).Exec()
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}
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