variable

type GlobalVarAccessor interface {
	// GetGlobalSysVar gets the global system variable value for name.
	GetGlobalSysVar(name string) (string, error)
	// SetGlobalSysVar sets the global system variable name to value.
	SetGlobalSysVar(name string, value string) error
}

type RetryInfo struct {
	Retrying               bool
	DroppedPreparedStmtIDs []uint32
	// contains filtered or unexported fields
}

type ScopeFlag uint8

type SessionVars struct {
	// user-defined variables
	Users map[string]string
	// system variables
	Systems map[string]string

	// Should be reset on transaction finished.
	TxnCtx *TransactionContext

	// following variables are special for current session
	Status uint16

	// Client capability
	ClientCapability uint32

	// Current user
	User string

	// Current DB
	CurrentDB string

	// Strict SQL mode
	StrictSQLMode bool

	// CommonGlobalLoaded indicates if common global variable has been loaded for this session.
	CommonGlobalLoaded bool

	// GlobalAccessor is used to set and get global variables.
	GlobalVarsAccessor GlobalVarAccessor

	// StmtCtx holds variables for current executing statement.
	StmtCtx *StatementContext

	// CurrInsertValues is used to record current ValuesExpr's values.
	// See http://dev.mysql.com/doc/refman/5.7/en/miscellaneous-functions.html#function_values
	CurrInsertValues interface{}

	// Per-connection time zones. Each client that connects has its own time zone setting, given by the session time_zone variable.
	// See https://dev.mysql.com/doc/refman/5.7/en/time-zone-support.html
	TimeZone *time.Location
}

type StatementContext struct {
	/* Variables that are set before execution */
	InUpdateOrDeleteStmt bool
	IgnoreTruncate       bool
	TruncateAsWarning    bool
	// contains filtered or unexported fields
}

type Statistics interface {
	// GetScope gets the status variables scope.
	GetScope(status string) ScopeFlag
	// Stats returns the statistics status variables.
	Stats() (map[string]interface{}, error)
}

type StatusVal struct {
	Scope ScopeFlag
	Value interface{}
}

type SysVar struct {
	// Scope is for whether can be changed or not
	Scope ScopeFlag

	// Variable name
	Name string

	// Variable value
	Value string
}

type TransactionContext struct {
	ForUpdate     bool
	InfoSchema    interface{}
	SchemaVersion int64
}