util

type AutoAnalyzeProcIDGenerator interface {
	// AutoAnalyzeProcID generates an analyze ID.
	AutoAnalyzeProcID() uint64
	ReleaseAutoAnalyzeProcID(uint64)
}

type AutoAnalyzeTracker struct {
	// contains filtered or unexported fields
}

type JSONColumn struct {
	Histogram *tipb.Histogram `json:"histogram"`
	CMSketch  *tipb.CMSketch  `json:"cm_sketch"`
	FMSketch  *tipb.FMSketch  `json:"fm_sketch"`
	// StatsVer is a pointer here since the old version json file would not contain version information.
	StatsVer          *int64  `json:"stats_ver"`
	NullCount         int64   `json:"null_count"`
	TotColSize        int64   `json:"tot_col_size"`
	LastUpdateVersion uint64  `json:"last_update_version"`
	Correlation       float64 `json:"correlation"`
}

type JSONExtendedStats struct {
	StatsName  string  `json:"stats_name"`
	StringVals string  `json:"string_vals"`
	ColIDs     []int64 `json:"cols"`
	ScalarVals float64 `json:"scalar_vals"`
	Tp         uint8   `json:"type"`
}

type JSONPredicateColumn struct {
	LastUsedAt     *string `json:"last_used_at"`
	LastAnalyzedAt *string `json:"last_analyzed_at"`
	ID             int64   `json:"id"`
}

type JSONTable struct {
	Columns           map[string]*JSONColumn `json:"columns"`
	Indices           map[string]*JSONColumn `json:"indices"`
	Partitions        map[string]*JSONTable  `json:"partitions"`
	DatabaseName      string                 `json:"database_name"`
	TableName         string                 `json:"table_name"`
	ExtStats          []*JSONExtendedStats   `json:"ext_stats"`
	PredicateColumns  []*JSONPredicateColumn `json:"predicate_columns"`
	Count             int64                  `json:"count"`
	ModifyCount       int64                  `json:"modify_count"`
	Version           uint64                 `json:"version"`
	IsHistoricalStats bool                   `json:"is_historical_stats"`
}

type LeaseGetter interface {
	// Lease returns the stats lease.
	Lease() time.Duration
	// SetLease sets the stats lease. Only used for test.
	SetLease(lease time.Duration)
}

type Pool interface {
	// GPool returns the goroutine pool.
	GPool() *gp.Pool

	// SPool returns the session pool.
	SPool() util.DestroyableSessionPool

	// Close closes the goroutine pool.
	Close()
}

type TableInfoGetter interface {
	// TableInfoByID returns the table info specified by the physicalID.
	// If the physicalID is corresponding to a partition, return its parent table.
	TableInfoByID(is infoschema.InfoSchema, physicalID int64) (table.Table, bool)
	// TableItemByID returns the schema name and table name specified by the physicalID.
	// This is pure memory operation.
	TableItemByID(is infoschema.InfoSchema, id int64) (infoschema.TableItem, bool)
}