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[Feature] Create table like clause support copy rollup (#6475)

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for issue #6474

```sql
create table test.table1 like test.table with rollup r1,r2 -- copy some rollup

create table test.table1 like test.table with rollup all -- copy all rollup

create table test.table1 like test.table  -- only copy base table
```
This commit is contained in:
shee
2021-08-31 20:33:26 +08:00
committed by GitHub
parent 138e7e896d
commit a949dcd9f6
6 changed files with 247 additions and 14 deletions
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21
docs/en/sql-reference/sql-statements/Data Definition/CREATE TABLE LIKE.md
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@ -32,13 +32,14 @@ Use CREATE TABLE ... LIKE to create an empty table based on the definition of an
Syntax:
```
CREATE [EXTERNAL] TABLE [IF NOT EXISTS] [database.]table_name LIKE [database.]table_name
CREATE [EXTERNAL] TABLE [IF NOT EXISTS] [database.]table_name LIKE [database.]table_name [WITH ROLLUP r1,r2,r3,...|ALL]
```
Explain:
1. The replicated table structures include Column Definition, Partitions, Table Properties, and so on
2. The SELECT privilege is required on the original table.
3. Support to copy external table such as MySQL.
4. Support to copy OLAP table rollup
## Example
1. Under the test1 Database, create an empty table with the same table structure as table1, named table2
@ -49,7 +50,23 @@ Explain:
CREATE TABLE test2.table2 LIKE test1.table1
3. Under the test1 Database, create an empty table with the same table structure as MySQL's external table1, called table2
3. Under the test1 Database, create an empty table with the same table structure as table1, named table2. copy r1 and r2 rollup of table1 simultaneously
CREATE TABLE test1.table2 LIKE test1.table1 WITH ROLLUP r1,r2
4. Under the test1 Database, create an empty table with the same table structure as table1, named table2. copy all rollup of table1 simultaneously
CREATE TABLE test1.table2 LIKE test1.table1 WITH ROLLUP ALL
5. Under the test2 Database, create an empty table with the same table structure as table1, named table2. copy r1 and r2 rollup of table1 simultaneously
CREATE TABLE test2.table2 LIKE test1.table1 WITH ROLLUP r1,r2
6. Under the test2 Database, create an empty table with the same table structure as table1, named table2. copy all rollup of table1 simultaneously
CREATE TABLE test2.table2 LIKE test1.table1 WITH ROLLUP ALL
7. Under the test1 Database, create an empty table with the same table structure as MySQL's external table1, called table2
CREATE TABLE test1.table2 LIKE test1.table1