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- Timestamp:
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May 5, 2008, 4:24:32 PM (16 years ago)
- Author:
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chwhs
- Comment:
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3 | 3 | |
4 | 4 | * The Bigtable data model is fairly straightforward, each data item is stored in a cell which can be accessed using its {row key, column key, timestamp}. |
5 | | * 注意: 由於無法實際操作過Bigtable,導致沒能確切知道Bigtable是否可以column key做搜尋(如:where ...), 不過Hypertable 與 Hbase經測試都僅能以row key做搜尋, 因此一開始應該是誤會Bigtable文章的意思, Bigtable和 Hypertable, Hbase 一樣, 可能都只能以row key 做查詢。 |
| 5 | * 注意: 由於無法實際操作過Bigtable,導致沒能確切知道Bigtable是否可以column key做搜尋(如:where ...), 不過Hypertable 與 Hbase經測試都僅能以row key做搜尋, 因此一開始應該是誤會Bigtable文章的意思, Bigtable和 Hypertable, Hbase 一樣, 可能都只能以row key 做查詢。 |
| 6 | |
| 7 | * Bigtable 查詢資料所用的語言(GQL: Google Query Language) |
| 8 | * GQL is a SQL-like language for retrieving data entities from the App Engine scalable datastore. |
| 9 | * While GQL's features are different from those of a query language for a traditional relational database, the GQL syntax is similar to that of SQL. |
6 | 10 | |
7 | 11 | * continue...(coming soon) |