Beispiel #1
0
//get the execute database for update sql
func (c *ClientConn) getUpdateExecDB(sql string, tokens []string, tokensLen int) (*ExecuteDB, error) {
	var ruleDB string
	executeDB := new(ExecuteDB)
	executeDB.sql = sql
	schema := c.proxy.schema
	router := schema.rule
	rules := router.Rules

	if len(rules) != 0 {
		for i := 0; i < tokensLen; i++ {
			if strings.ToLower(tokens[i]) == mysql.TK_STR_SET {
				DBName, tableName := sqlparser.GetDBTable(tokens[i-1])
				//if the token[i+1] like this:kingshard.test_shard_hash
				if DBName != "" {
					ruleDB = DBName
				} else {
					ruleDB = c.db
				}
				if router.GetRule(ruleDB, tableName) != router.DefaultRule {
					return nil, nil
				} else {
					break
				}
			}
		}
	}

	err := c.setExecuteNode(tokens, tokensLen, executeDB)
	if err != nil {
		return nil, err
	}

	return executeDB, nil
}
Beispiel #2
0
//get the execute database for select sql
func (c *ClientConn) getSelectExecDB(sql string, tokens []string, tokensLen int) (*ExecuteDB, error) {
	var ruleDB string
	executeDB := new(ExecuteDB)
	executeDB.sql = sql
	executeDB.IsSlave = true

	schema := c.proxy.schema
	router := schema.rule
	rules := router.Rules

	if len(rules) != 0 {
		for i := 1; i < tokensLen; i++ {
			if strings.ToLower(tokens[i]) == mysql.TK_STR_FROM {
				if i+1 < tokensLen {
					DBName, tableName := sqlparser.GetDBTable(tokens[i+1])
					//if the token[i+1] like this:kingshard.test_shard_hash
					if DBName != "" {
						ruleDB = DBName
					} else {
						ruleDB = c.db
					}
					if router.GetRule(ruleDB, tableName) != router.DefaultRule {
						return nil, nil
					} else {
						//if the table is not shard table,send the sql
						//to default db
						break
					}
				}
			}

			if strings.ToLower(tokens[i]) == mysql.TK_STR_LAST_INSERT_ID {
				return nil, nil
			}
		}
	}

	//if send to master
	if 2 < tokensLen {
		if strings.ToLower(tokens[1]) == mysql.TK_STR_MASTER_HINT {
			executeDB.IsSlave = false
		}
	}
	err := c.setExecuteNode(tokens, tokensLen, executeDB)
	if err != nil {
		return nil, err
	}
	return executeDB, nil
}