func (qe *QueryEngine) execDDL(logStats *sqlQueryStats, ddl string) *mproto.QueryResult {
ddlPlan := sqlparser.DDLParse(ddl)
if ddlPlan.Action == 0 {
panic(NewTabletError(FAIL, "DDL is not understood"))
}
// Stolen from Begin
conn := qe.txPool.Get()
txid, err := qe.activeTxPool.SafeBegin(conn)
if err != nil {
conn.Recycle()
panic(err)
}
// Stolen from Commit
defer qe.activeTxPool.SafeCommit(txid)
// Stolen from Execute
conn = qe.activeTxPool.Get(txid)
defer conn.Recycle()
result, err := qe.executeSql(logStats, conn, ddl, false)
if err != nil {
panic(NewTabletErrorSql(FAIL, err))
}
qe.schemaInfo.DropTable(ddlPlan.TableName)
if ddlPlan.Action != sqlparser.DROP { // CREATE, ALTER, RENAME
qe.schemaInfo.CreateTable(ddlPlan.NewName)
}
return result
}
// InvalidateForDDL performs schema and rowcache changes for the ddl.
func (qe *QueryEngine) InvalidateForDDL(ddlInvalidate *proto.DDLInvalidate) {
ddlPlan := sqlparser.DDLParse(ddlInvalidate.DDL)
if ddlPlan.Action == 0 {
panic(NewTabletError(FAIL, "DDL is not understood"))
}
qe.schemaInfo.DropTable(ddlPlan.TableName)
if ddlPlan.Action != sqlparser.DROP { // CREATE, ALTER, RENAME
qe.schemaInfo.CreateTable(ddlPlan.NewName)
}
}
func (qe *QueryEngine) InvalidateForDDL(ddlInvalidate *proto.DDLInvalidate) {
qe.mu.RLock()
defer qe.mu.RUnlock()
ddlPlan := sqlparser.DDLParse(ddlInvalidate.DDL)
if ddlPlan.Action == 0 {
panic(NewTabletError(FAIL, "DDL is not understood"))
}
qe.schemaInfo.DropTable(ddlPlan.TableName)
if ddlPlan.Action != sqlparser.DROP { // CREATE, ALTER, RENAME
qe.schemaInfo.CreateTable(ddlPlan.NewName)
}
qe.adminCache.Set(ROWCACHE_INVALIDATION_POSITION, 0, 0, []byte(ddlInvalidate.Position))
}