[feature-wip](iceberg) Step1: Support create Iceberg external table

[qidaye]

Proposed changes

Close related #7389

Support create Iceberg external table in Doris.

This is the first step to support Iceberg external table.

Create Iceberg external table

This pr describes two ways to create Iceberg external tables. Both ways do not require explicitly specifying column definitions, Doris automatically converts them based on Iceberg's column definitions.

1. Create an Iceberg external table directly

 CREATE [EXTERNAL] TABLE table_name ENGINE = ICEBERG
[COMMENT "comment"]
PROPERTIES (
"iceberg.database"="iceberg_db_name",
"iceberg.table"="icberg_table_name",
"iceberg.hive.metastore.uris"="thrift://192.168.0.1:9083",
"iceberg.catalog.type"="HIVE_CATALOG"
);

2. Create an Iceberg database and automatically create all the tables under that db.

CREATEDATABASEdb_name [COMMENT "comment"]
PROPERTIES (
"iceberg.database"="iceberg_db_name",
"iceberg.hive.metastore.uris"="thrift://192.168.0.1:9083",
"iceberg.catalog.type"="HIVE_CATALOG"
);

Show table creation

1. For individual tables you can view them with help show create table.

mysql> show create table iceberg_db.logs_1;
+--------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Table | Create Table |
+--------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| logs_1 | CREATE TABLE `logs_1` (
`level`varchar(-1) NOT NULL COMMENT "null",
`event_time` datetime NOT NULL COMMENT "null",
`message`varchar(-1) NOT NULL COMMENT "null"
) ENGINE=ICEBERG
COMMENT "ICEBERG"
PROPERTIES (
"iceberg.database"="doris",
"iceberg.table"="logs_1",
"iceberg.hive.metastore.uris"="thrift://10.10.10.10:9087",
"iceberg.catalog.type"="HIVE_CATALOG"
) |
+--------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+

2. For Iceberg database, you can view it with help show table creation.

mysql> show table creation from iceberg_db;
+--------+---------+---------------------+---------------------------------------------------------+
| Table | Status | Create Time | Error Msg |
+--------+---------+---------------------+---------------------------------------------------------+
| logs | fail | 2021-12-1413:50:10 | Cannot convert unknown type to Doris type: list<string> |
| logs_1 | success | 2021-12-1413:50:10 | |
+--------+---------+---------------------+---------------------------------------------------------+2 rows inset (0.00 sec)

This is a new syntax.

Show table creation records in Iceberg database:

Syntax:

 SHOW TABLE CREATION [FROM db] [LIKE mask]

Types of changes

What types of changes does your code introduce to Doris?
Put an x in the boxes that apply

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation Update (if none of the other choices apply)
• Code refactor (Modify the code structure, format the code, etc...)
• Optimization. Including functional usability improvements and performance improvements.
• Dependency. Such as changes related to third-party components.
• Other.

Checklist

Put an x in the boxes that apply. You can also fill these out after creating the PR. If you're unsure about any of them, don't hesitate to ask. We're here to help! This is simply a reminder of what we are going to look for before merging your code.

• I have created an issue on (Fix #ISSUE) and described the bug/feature there in detail
• Compiling and unit tests pass locally with my changes
• I have added tests that prove my fix is effective or that my feature works
• If these changes need document changes, I have updated the document
• Any dependent changes have been merged

Further comments

If this is a relatively large or complex change, kick off the discussion at dev@doris.apache.org by explaining why you chose the solution you did and what alternatives you considered, etc...

[morningman]

What if the listTables throw exception?

[morningman]

not resolved?

[qidaye]

Added a new DorisIcebergException which is a RuntimeException in IcebergCatalog.listTable.

[morningman]

not resolved?

[morningman]

merge these 2 methods:

db.getDbProperties().putAll(properties);
db.getDbProperties().checkAndBuildProperties();

to

db.addAndBuildProperties(properties);

[morningman]

LGTM

[github-actions]

PR approved by at least one committer and no changes requested.

[github-actions]

PR approved by anyone and no changes requested.