Files
doris/docs
ZHAO Chun 65c3b0907a Support aggregation type of REPLACE_IF_NOT_NULL (#2127)
Some use has the requirment that only some of columns will be update in
one load operation, and others will retain as original. However, Doris
can't handle this situation, because user must specify value for all
columns. Then if a column aggregation method is REPLACE, use must query
original value to overwrite it. This often needs some work for user to
do.

If this CL is applied, user can use REPLACE_IF_NOT_NULL instead of
REPLACE. Then when load data to table, if user don't intent to change
value of this column, user can specify NULL for this column. Doris will
retain original value for this column.
2019-11-05 18:08:34 +08:00
..

Philosophy

write once, use everywhere

Documentations will be written once, and will be converted to other format according to different application scenarios.

Implementation

         +---------------+
         | Documentation |
         +-------+-------+
                 |
         +-------+-------+
         |  Doc Builder  |
         +-------+-------+
                 |
    +--------------------------------+
    |            |                   |
+---+---+    +---+----+        +-----+----+
|  PDF  |    |  HTML  |  ....  | Help Doc |
+-------+    +--------+        +----------+

Documentation:Text contents which is written by human. And this is the only place for documentation. Doc Builder: Tools that convert documentations to other format, such as PDF, HTML. There could be many tools, and we can use different tools to convert documentation to different formats.

Organization

docs/documentation: Root directory for documentation. And for different languages, there is a root directory for it. For example, docs/documentation/cn is the Chinese documentation's root directory. docs/scripts: Place of Doc Builder. docs/resources: Resources that are referenced in documentation, such as pictures. docs/website: A website for documentations built with Sphinx using a theme provided by Read-the-Docs.

Constraints

  1. All documents are written in Markdown format, and file name is end with ".md".
  2. All documents are started with level 1 title # Title, and should have only one level 1 title.
  3. Names of file and directory are in lowercase letters, and use dashes as separator.
  4. Documentation can be constructed as a directory or a single Markdown file, these two formats equal with each other in logical. Relationship is represented by parent-child directory in directory format, and by title level in file format. It is recommended to use directory format to manage a large documentation, because it is easy to maintain.
  5. A directory corresponds to a title, and readme.md in this directory is its content. Other documents in this directory is its sub-sections.
  6. For manual like section, such as function description, there should be Description, Syntax, Examples section in documents.

Level Directories

  1. doris-concepts
  2. installing
  3. getting-started
  4. administrator-guide
  5. sql-references
  6. best-practices
  7. internals
  8. community

Each directory, or its sub directories should contain a file index.rst, for constructing the navibar of the website. For example:

documentation/
└── cn
    ├── administrator-guide
    │   ├── index.rst
    │   ├── http-actions
    │   │   └── index.rst
    │   ├── load-data
    │   │   ├── index.rst
    │   ├── operation
    │   │   ├── index.rst
    ├── extending-doris
    │   ├── index.rst
    └── sql-reference
        ├── index.rst
        │   ├── date-time-functions
        │   │   ├── index.rst

Docs Styles

There are some styles need to be followed.

SQL-Statement

Docs under documentation/cn/sql-reference/sql-statements/ must obey the following style

# TITLE(capital)

## description

    The description of this doc. The "## description" must be reserved, with a following empty line.

## keyword

    The keyword of this doc. Usually, this can be the title of this doc.
    The "## keyword" must  be reserved, with a following empty line.