forked from mirror/gorm
85 lines
2.5 KiB
Go
85 lines
2.5 KiB
Go
package gorm
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import (
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"fmt"
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"reflect"
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"time"
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)
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type sqlite3 struct {
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commonDialect
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}
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func (sqlite3) SqlTag(value reflect.Value, size int, autoIncrease bool) 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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if autoIncrease {
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return "integer primary key autoincrement"
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}
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return "integer"
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case reflect.Int64, reflect.Uint64:
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if autoIncrease {
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return "integer primary key autoincrement"
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}
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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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}
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return "text"
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case reflect.Struct:
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if _, ok := value.Interface().(time.Time); ok {
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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) HasTable(scope *Scope, tableName string) bool {
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var count int
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s.RawScanInt(scope, &count, "SELECT count(*) FROM sqlite_master WHERE type='table' AND name=?", tableName)
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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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s.RawScanInt(scope, &count, fmt.Sprintf("SELECT count(*) FROM sqlite_master WHERE tbl_name = ? AND (sql LIKE '%%(\"%v\" %%' OR sql LIKE '%%,\"%v\" %%' OR sql LIKE '%%, \"%v\" %%' OR sql LIKE '%%( %v %%' OR sql LIKE '%%, %v %%' OR sql LIKE '%%,%v %%');\n", columnName, columnName, columnName, columnName, columnName, columnName), tableName)
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return count > 0
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}
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func (s sqlite3) HasIndex(scope *Scope, tableName string, indexName string) bool {
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var count int
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s.RawScanInt(scope, &count, fmt.Sprintf("SELECT count(*) FROM sqlite_master WHERE tbl_name = ? AND sql LIKE '%%INDEX %v ON%%'", indexName), tableName)
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return count > 0
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}
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func (sqlite3) RemoveIndex(scope *Scope, indexName string) {
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scope.Err(scope.NewDB().Exec(fmt.Sprintf("DROP INDEX %v", indexName)).Error)
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}
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func (sqlite3) CurrentDatabase(scope *Scope) (name string) {
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var (
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ifaces = make([]interface{}, 3)
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pointers = make([]*string, 3)
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i int
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)
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for i = 0; i < 3; i++ {
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ifaces[i] = &pointers[i]
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}
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if err := scope.NewDB().Raw("PRAGMA database_list").Row().Scan(ifaces...); scope.Err(err) != nil {
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return
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}
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if pointers[1] != nil {
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name = *pointers[1]
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}
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return
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}
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