vitessio/vitess · error

err

Error message

err

What it means

This is a raw `panic(err)` inside createUpdateOpWithTarget. After building the UPDATE operator, the planner re-resolves the target table info; if the semantic analysis cannot resolve the table for the update (ti.Name() failing), the internal error is re-raised as a panic. Vitess converts planner panics into VTGate internal errors, so the user sees the underlying resolution failure message.

Source

Thrown at go/vt/vtgate/planbuilder/operators/update.go:254

				}
			}
		}
	}
}

func createUpdateOpWithTarget(ctx *plancontext.PlanningContext, updStmt *sqlparser.Update, target semantics.TableSet, uList updList) dmlOp {
	if len(uList) == 0 {
		panic(vterrors.VT13001("no update expression for the target"))
	}

	ti, err := ctx.SemTable.TableInfoFor(target)
	if err != nil {
		panic(vterrors.VT13001(err.Error()))
	}
	vTbl := ti.GetVindexTable()
	tblName, err := ti.Name()
	if err != nil {
		panic(err)
	}

	var leftComp sqlparser.ValTuple
	if len(vTbl.PrimaryKey) > 0 {
		leftComp = make(sqlparser.ValTuple, 0, len(vTbl.PrimaryKey))
	}
	cols := make([]*sqlparser.ColName, 0, len(vTbl.PrimaryKey))
	for _, col := range vTbl.PrimaryKey {
		colName := sqlparser.NewColNameWithQualifier(col.String(), tblName)
		cols = append(cols, colName)
		leftComp = append(leftComp, colName)
		ctx.SemTable.Recursive[colName] = target
	}
	// optimize for case when there is only single column on left hand side.
	var lhs sqlparser.Expr = leftComp
	if len(leftComp) == 1 {
		lhs = leftComp[0]
	}

View on GitHub (pinned to 01a25a7d17)

Solutions

1. Rewrite the UPDATE to target a real, unambiguous table name (no derived-table targets).
2. Check the table's vindex configuration in the keyspace routing rules / vschema for errors.
3. If it persists, file a Vitess bug with the query and vschema; this panic signals an unsupported or buggy path.
4. Check for missing or misnamed tables in the vschema (table not defined where expected).

Example fix

// before
UPDATE (SELECT id FROM t) AS x SET name = 'a';
// after
UPDATE t SET name = 'a' WHERE id IN (SELECT id FROM t);

// Ensure the UPDATE targets a real, routable base table
if !isBaseTable(updateTarget) {
  return errors.New("UPDATE must target a real base table known to the vschema")
}

// Vitess converts the panic to an internal error on the RPC
res, err := vtgate.Execute(ctx, session, query, vars)
if isInternalError(err) { log.Error(err); return fallbackPlan() }

When it happens

Trigger: Running an UPDATE whose target table expression cannot be resolved by the semantic table during plan building — e.g. the table info lookup or ti.Name() fails for a derived/aliased target in createUpdateOpWithTarget.

Common situations: Updating through an alias or derived table expression that the planner's table resolution does not support; corrupt or unusual vindex metadata on the target; planner bugs reached via unusual UPDATE syntax.

Related errors

• err
• only integer literals are supported
• only the integer literal 1 is supported
• VT13001
• VT09015

AI-assisted analysis of vitessio/vitess@01a25a7d17 (2026-09-01). Data as JSON: /api/errors/30ab5ae2b83913bc. Report an issue: GitHub.