/**
* 目前只支持这个操作 单条insert（非批量）
*
* @param schema
* @param rrs
* @param partitionColumn
* @param tableName
* @param insertStmt
* @throws SQLNonTransientException
*/
private void parserSingleInsert(
SchemaConfig schema,
RouteResultset rrs,
String partitionColumn,
String tableName,
MySqlInsertStatement insertStmt)
throws SQLNonTransientException {
boolean isFound = false;
// 将分片的键 作为 路由计算单元
for (int i = 0; i < insertStmt.getColumns().size(); i++) {
if (partitionColumn.equalsIgnoreCase(
StringUtil.removeBackquote(insertStmt.getColumns().get(i).toString()))) {
// 找到分片字段
isFound = true;
String column = StringUtil.removeBackquote(insertStmt.getColumns().get(i).toString());
String value =
StringUtil.removeBackquote(insertStmt.getValues().getValues().get(i).toString());
RouteCalculateUnit routeCalculateUnit = new RouteCalculateUnit();
routeCalculateUnit.addShardingExpr(tableName, column, value);
ctx.addRouteCalculateUnit(routeCalculateUnit);
// mycat是单分片键，找到了就返回
break;
}
}
if (!isFound) { // 分片表的
String msg =
"bad insert sql (sharding column:" + partitionColumn + " not provided," + insertStmt;
logger.warn(msg);
throw new SQLNonTransientException(msg);
}
// 这种语句不应该支持
// insert into .... on duplicateKey
// such as : INSERT INTO TABLEName (a,b,c) VALUES (1,2,3) ON DUPLICATE KEY UPDATE
// b=VALUES(b);
// INSERT INTO TABLEName (a,b,c) VALUES (1,2,3) ON DUPLICATE KEY UPDATE c=c+1;
// du plicate 处理！！
if (insertStmt.getDuplicateKeyUpdate() != null) {
List<SQLExpr> updateList = insertStmt.getDuplicateKeyUpdate();
for (SQLExpr expr : updateList) {
SQLBinaryOpExpr opExpr = (SQLBinaryOpExpr) expr;
String column = StringUtil.removeBackquote(opExpr.getLeft().toString().toUpperCase());
if (column.equals(partitionColumn)) {
String msg = "partion key can't be updated: " + tableName + " -> " + partitionColumn;
logger.warn(msg);
throw new SQLNonTransientException(msg);
}
}
}
}
public static boolean processERChildTable(
final SchemaConfig schema, final String origSQL, final ServerConnection sc)
throws SQLNonTransientException {
String tableName = StringUtil.getTableName(origSQL).toUpperCase();
final TableConfig tc = schema.getTables().get(tableName);
if (null != tc && tc.isChildTable()) {
final RouteResultset rrs = new RouteResultset(origSQL, ServerParse.INSERT);
String joinKey = tc.getJoinKey();
MySqlInsertStatement insertStmt =
(MySqlInsertStatement) (new MySqlStatementParser(origSQL)).parseInsert();
int joinKeyIndex = getJoinKeyIndex(insertStmt.getColumns(), joinKey);
if (joinKeyIndex == -1) {
String inf = "joinKey not provided :" + tc.getJoinKey() + "," + insertStmt;
LOGGER.warn(inf);
throw new SQLNonTransientException(inf);
}
if (isMultiInsert(insertStmt)) {
String msg = "ChildTable multi insert not provided";
LOGGER.warn(msg);
throw new SQLNonTransientException(msg);
}
String joinKeyVal = insertStmt.getValues().getValues().get(joinKeyIndex).toString();
String sql = insertStmt.toString();
// try to route by ER parent partion key
RouteResultset theRrs = RouterUtil.routeByERParentKey(sql, rrs, tc, joinKeyVal);
if (theRrs != null) {
rrs.setFinishedRoute(true);
sc.getSession2().execute(rrs, ServerParse.INSERT);
return true;
}
// route by sql query root parent's datanode
final String findRootTBSql = tc.getLocateRTableKeySql().toLowerCase() + joinKeyVal;
if (LOGGER.isDebugEnabled()) {
LOGGER.debug("find root parent's node sql " + findRootTBSql);
}
ListenableFuture<String> listenableFuture =
MycatServer.getInstance()
.getListeningExecutorService()
.submit(
new Callable<String>() {
@Override
public String call() throws Exception {
FetchStoreNodeOfChildTableHandler fetchHandler =
new FetchStoreNodeOfChildTableHandler();
return fetchHandler.execute(
schema.getName(), findRootTBSql, tc.getRootParent().getDataNodes());
}
});
Futures.addCallback(
listenableFuture,
new FutureCallback<String>() {
@Override
public void onSuccess(String result) {
if (Strings.isNullOrEmpty(result)) {
StringBuilder s = new StringBuilder();
LOGGER.warn(
s.append(sc.getSession2()).append(origSQL).toString()
+ " err:"
+ "can't find (root) parent sharding node for sql:"
+ origSQL);
sc.writeErrMessage(
ErrorCode.ER_PARSE_ERROR,
"can't find (root) parent sharding node for sql:" + origSQL);
return;
}
if (LOGGER.isDebugEnabled()) {
LOGGER.debug(
"found partion node for child table to insert " + result + " sql :" + origSQL);
}
RouteResultset executeRrs = RouterUtil.routeToSingleNode(rrs, result, origSQL);
sc.getSession2().execute(executeRrs, ServerParse.INSERT);
}
@Override
public void onFailure(Throwable t) {
StringBuilder s = new StringBuilder();
LOGGER.warn(
s.append(sc.getSession2()).append(origSQL).toString() + " err:" + t.getMessage());
sc.writeErrMessage(ErrorCode.ER_PARSE_ERROR, t.getMessage() + " " + s.toString());
}
},
MycatServer.getInstance().getListeningExecutorService());
return true;
}
return false;
}
