func getPKValues(conditions []*sqlparser.ComparisonExpr, pkIndex *schema.Index) []interface{} {
pkValues := make([]interface{}, len(pkIndex.Columns))
inClauseSeen := false
for _, condition := range conditions {
if condition.Operator == sqlparser.InStr {
if inClauseSeen {
return nil
}
inClauseSeen = true
}
index := pkIndex.FindColumn(condition.Left.(*sqlparser.ColName).Name.Original())
if index == -1 {
return nil
}
if pkValues[index] != nil {
return nil
}
var err error
pkValues[index], err = sqlparser.AsInterface(condition.Right)
if err != nil {
return nil
}
}
for _, v := range pkValues {
if v == nil {
return nil
}
}
return pkValues
}
func (node *Node) execAnalyzeUpdateExpressions(pkIndex *schema.Index) (pkValues []interface{}, ok bool) {
for i := 0; i < node.Len(); i++ {
columnName := string(node.At(i).At(0).Value)
index := pkIndex.FindColumn(columnName)
if index == -1 {
continue
}
value := node.At(i).At(1).execAnalyzeValue()
if value == nil {
log.Warningf("expression is too complex %v", node.At(i).At(0))
return nil, false
}
if pkValues == nil {
pkValues = make([]interface{}, len(pkIndex.Columns))
}
pkValues[index] = asInterface(value)
}
return pkValues, true
}
func analyzeUpdateExpressions(exprs sqlparser.UpdateExprs, pkIndex *schema.Index) (pkValues []interface{}, err error) {
for _, expr := range exprs {
index := pkIndex.FindColumn(expr.Name.Original())
if index == -1 {
continue
}
if !sqlparser.IsValue(expr.Expr) {
return nil, ErrTooComplex
}
if pkValues == nil {
pkValues = make([]interface{}, len(pkIndex.Columns))
}
var err error
pkValues[index], err = sqlparser.AsInterface(expr.Expr)
if err != nil {
return nil, err
}
}
return pkValues, nil
}
func analyzeUpdateExpressions(exprs sqlparser.UpdateExprs, pkIndex *schema.Index) (pkValues []interface{}, err error) {
for _, expr := range exprs {
index := pkIndex.FindColumn(sqlparser.GetColName(expr.Name))
if index == -1 {
continue
}
if !sqlparser.IsValue(expr.Expr) {
log.Warningf("expression is too complex %v", expr)
return nil, TooComplex
}
if pkValues == nil {
pkValues = make([]interface{}, len(pkIndex.Columns))
}
var err error
pkValues[index], err = sqlparser.AsInterface(expr.Expr)
if err != nil {
return nil, err
}
}
return pkValues, nil
}
