mirror of https://github.com/go-gorm/gorm.git
79 lines
2.3 KiB
Go
79 lines
2.3 KiB
Go
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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 foundation struct {
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commonDialect
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}
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func (foundation) BinVar(i int) string {
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return fmt.Sprintf("$%v", i)
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}
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func (foundation) SupportLastInsertId() bool {
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return false
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}
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func (foundation) 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 "boolean"
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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 "serial"
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}
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return "int"
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case reflect.Int64, reflect.Uint64:
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if autoIncrease {
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return "bigserial"
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}
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return "bigint"
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case reflect.Float32, reflect.Float64:
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return "double"
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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 "clob"
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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 foundation", value.Type().Name(), value.Kind().String()))
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}
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func (f foundation) ReturningStr(tableName, key string) string {
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return fmt.Sprintf("RETURNING %v.%v", f.Quote(tableName), key)
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}
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func (foundation) HasTable(scope *Scope, tableName string) bool {
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var count int
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scope.NewDB().Raw("SELECT count(*) FROM INFORMATION_SCHEMA.tables WHERE table_schema = current_schema AND table_type = 'TABLE' AND table_name = ?", tableName).Row().Scan(&count)
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return count > 0
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}
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func (foundation) HasColumn(scope *Scope, tableName string, columnName string) bool {
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var count int
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scope.NewDB().Raw("SELECT count(*) FROM INFORMATION_SCHEMA.columns WHERE table_schema = current_schema AND table_name = ? AND column_name = ?", tableName, columnName).Row().Scan(&count)
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return count > 0
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}
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func (f foundation) RemoveIndex(scope *Scope, indexName string) {
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scope.NewDB().Exec(fmt.Sprintf("DROP INDEX %v", f.Quote(indexName)))
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}
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func (foundation) HasIndex(scope *Scope, tableName string, indexName string) bool {
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var count int
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scope.NewDB().Raw("SELECT count(*) FROM INFORMATION_SCHEMA.indexes WHERE table_schema = current_schema AND table_name = ? AND index_name = ?", tableName, indexName).Row().Scan(&count)
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return count > 0
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}
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