qingbozhang

When I using [ODPS](https://help.aliyun.com/document_detail/280394.html) datasource in latest (branch dev-0.3) Exception thrown. the reason is `druid wall filter not support some database` so I do these : 1. add ODPS to...

创建外部表

1

外部表使用PARQUET格式 SQL里这样指定 stored as PARQUET 但是在SDK里只能传 storedBy，会被解析为 STORED BY

docker alpine:3.10.1 环境运行报错

5

docker alpine:3.10.1 环境运行报错，怎解 ```text SIGQUIT: quit PC=0x47d801 m=4 sigcode=0 goroutine 0 [idle]: runtime.futex(0xc000100150, 0x80, 0x0, 0x0, 0x0, 0x0, 0xc000100000, 0x7f5217a3b7e0, 0x7f5217a3b7f0, 0x4153df, ...) /usr/local/go/src/runtime/sys_linux_amd64.s:579 +0x21 fp=0x7f5217a3b778 sp=0x7f5217a3b770 pc=0x47d801 runtime.futexsleep(0xc000100150, 0x0,...

- 修复获取文件长度时候全量读取的问题 - 优化压缩时候全量读取的问题，节约内存 略微损失压缩率 

fix: Double-checked locking for logConstructor

2

When the `tryImplementation` method is called concurrently, the value of `logConstructor` may be overwritten. So I'm going to use DCL to solve this problem.