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Update 24-show.md

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@ -178,75 +178,135 @@ SHOW TABLE DISTRIBUTED table_name;
Shows how table data is distributed. Shows how table data is distributed.
Examples： show table distributed d0\G; Display the block distribution of table `d0` in detailed format. Examples： Below is an example of this command to display the block distribution of table `d0` in detailed format.
```sql
show table distributed d0\G;
```
<details>
<summary> Show Example </summary>
<pre><code>
*************************** 1.row *************************** *************************** 1.row ***************************
_block_dist: Total_Blocks=[5] Total_Size=[93.65 Kb] Average_size=[18.73 Kb] Compression_Ratio=[23.98 %] _block_dist: Total_Blocks=[5] Total_Size=[93.65 Kb] Average_size=[18.73 Kb] Compression_Ratio=[23.98 %]
Total_Blocks : Table `d0` contains total 5 blocks Total_Blocks : Table `d0` contains total 5 blocks
Total_Size: The total size of all the data blocks in table `d0` is 93.65 KB Total_Size: The total size of all the data blocks in table `d0` is 93.65 KB
Average_size: The average size of each block is 18.73 KB Average_size: The average size of each block is 18.73 KB
Compression_Ratio: The data compression rate is 23.98% Compression_Ratio: The data compression rate is 23.98%
*************************** 2.row *************************** *************************** 2.row ***************************
_block_dist: Total_Rows=[20000] Inmem_Rows=[0] MinRows=[3616] MaxRows=[4096] Average_Rows=[4000] _block_dist: Total_Rows=[20000] Inmem_Rows=[0] MinRows=[3616] MaxRows=[4096] Average_Rows=[4000]
Total_Rows: Table `d0` contains 20,000 rows Total_Rows: Table `d0` contains 20,000 rows
Inmem_Rows： The rows still in memory, i.e. not committed in disk, is 0, i.e. none such rows Inmem_Rows： The rows still in memory, i.e. not committed in disk, is 0, i.e. none such rows
MinRows： The minimum number of rows in a block is 3,616 MinRows： The minimum number of rows in a block is 3,616
MaxRows： The maximum number of rows in a block is 4,096B MaxRows： The maximum number of rows in a block is 4,096B
Average_Rows： The average number of rows in a block is 4,000 Average_Rows： The average number of rows in a block is 4,000
*************************** 3.row *************************** *************************** 3.row ***************************
_block_dist: Total_Tables=[1] Total_Files=[2] _block_dist: Total_Tables=[1] Total_Files=[2]
Total_Tables: The number of child tables, 1 in this example Total_Tables: The number of child tables, 1 in this example
Total_Files： The number of files storing the table's data, 2 in this example Total_Files： The number of files storing the table's data, 2 in this example
*************************** 4.row *************************** *************************** 4.row ***************************
_block_dist: -------------------------------------------------------------------------------- _block_dist: --------------------------------------------------------------------------------
*************************** 5.row *************************** *************************** 5.row ***************************
_block_dist: 0100 | _block_dist: 0100 |
*************************** 6.row *************************** *************************** 6.row ***************************
_block_dist: 0299 | _block_dist: 0299 |
*************************** 7.row *************************** *************************** 7.row ***************************
_block_dist: 0498 | _block_dist: 0498 |
*************************** 8.row *************************** *************************** 8.row ***************************
_block_dist: 0697 | _block_dist: 0697 |
*************************** 9.row *************************** *************************** 9.row ***************************
_block_dist: 0896 | _block_dist: 0896 |
*************************** 10.row *************************** *************************** 10.row ***************************
_block_dist: 1095 | _block_dist: 1095 |
*************************** 11.row *************************** *************************** 11.row ***************************
_block_dist: 1294 | _block_dist: 1294 |
*************************** 12.row *************************** *************************** 12.row ***************************
_block_dist: 1493 | _block_dist: 1493 |
*************************** 13.row *************************** *************************** 13.row ***************************
_block_dist: 1692 | _block_dist: 1692 |
*************************** 14.row *************************** *************************** 14.row ***************************
_block_dist: 1891 | _block_dist: 1891 |
*************************** 15.row *************************** *************************** 15.row ***************************
_block_dist: 2090 | _block_dist: 2090 |
*************************** 16.row *************************** *************************** 16.row ***************************
_block_dist: 2289 | _block_dist: 2289 |
*************************** 17.row *************************** *************************** 17.row ***************************
_block_dist: 2488 | _block_dist: 2488 |
*************************** 18.row *************************** *************************** 18.row ***************************
_block_dist: 2687 | _block_dist: 2687 |
*************************** 19.row *************************** *************************** 19.row ***************************
_block_dist: 2886 | _block_dist: 2886 |
*************************** 20.row *************************** *************************** 20.row ***************************
_block_dist: 3085 | _block_dist: 3085 |
*************************** 21.row *************************** *************************** 21.row ***************************
_block_dist: 3284 | _block_dist: 3284 |
*************************** 22.row *************************** *************************** 22.row ***************************
_block_dist: 3483 ||||||||||||||||| 1 (20.00%) _block_dist: 3483 ||||||||||||||||| 1 (20.00%)
*************************** 23.row *************************** *************************** 23.row ***************************
_block_dist: 3682 | _block_dist: 3682 |
*************************** 24.row *************************** *************************** 24.row ***************************
_block_dist: 3881 ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| 4 (80.00%) _block_dist: 3881 ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| 4 (80.00%)
Query OK, 24 row(s) in set (0.002444s) Query OK, 24 row(s) in set (0.002444s)
</code></pre>
</details>
The above show the block distribution percentage according to the number of rows in each block. In the above example, `_block_dist: 3483 ||||||||||||||||| 1 (20.00%)` means there is one block whose rows is between 3,483 and 3,681. `_block_dist: 3881 ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| 4 (80.00%)` means there are 4 blocks whose rows is between 3,881 and 4,096. The number of blocks whose rows fall in other range is zero. The above show the block distribution percentage according to the number of rows in each block. In the above example, `_block_dist: 3483 ||||||||||||||||| 1 (20.00%)` means there is one block whose rows is between 3,483 and 3,681. `_block_dist: 3881 ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| 4 (80.00%)` means there are 4 blocks whose rows is between 3,881 and 4,096. The number of blocks whose rows fall in other range is zero.
## SHOW TAGS ## SHOW TAGS