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planner: ignore the virtual column when collect statistics (#10623) #10628

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May 29, 2019
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planner: ignore the virtual column when collect statistics (#10623) #10628

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4 changes: 4 additions & 0 deletions planner/core/planbuilder.go
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Original file line number Diff line number Diff line change
Expand Up @@ -665,6 +665,10 @@ func (b *planBuilder) buildCheckIndexSchema(tn *ast.TableName, indexName string)
func getColsInfo(tn *ast.TableName) (indicesInfo []*model.IndexInfo, colsInfo []*model.ColumnInfo, pkCol *model.ColumnInfo) {
tbl := tn.TableInfo
for _, col := range tbl.Columns {
// The virtual column will not store any data in TiKV, so it should be ignored when collect statistics
if col.IsGenerated() && !col.GeneratedStored {
continue
}
if tbl.PKIsHandle && mysql.HasPriKeyFlag(col.Flag) {
pkCol = col
} else {
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