The column IDs in the tables under metrics_schema are 0, which may be problematic for operations that rely on uniqueness.

[zimulala]

tidb/infoschema/metrics_schema.go

Lines 45 to 52 in 55cb709

	for name, def := range MetricTableMap {
	cols := def.genColumnInfos()
	tableInfo := buildTableMeta(name, cols)
	tableInfo.ID = tableID
	tableInfo.Comment = def.Comment
	tableID++
	metricTables = append(metricTables, tableInfo)
	}

tidb/infoschema/metrics_schema.go

Lines 86 to 99 in 55cb709

	func (def *MetricTableDef) genColumnInfos() []columnInfo {
	cols := []columnInfo{
	{name: "time", tp: mysql.TypeDatetime, size: 19, deflt: "CURRENT_TIMESTAMP"},
	}
	for _, label := range def.Labels {
	cols = append(cols, columnInfo{name: label, tp: mysql.TypeVarchar, size: 512})
	}
	if def.Quantile > 0 {
	defaultValue := strconv.FormatFloat(def.Quantile, 'f', -1, 64)
	cols = append(cols, columnInfo{name: "quantile", tp: mysql.TypeDouble, size: 22, deflt: defaultValue})
	}
	cols = append(cols, columnInfo{name: "value", tp: mysql.TypeDouble, size: 22})
	return cols
	}

No value was assigned to column ID.

[zimulala]

Relate PR：#45744

[zimulala]

Fixed #45764