Clickhouse: Support CREATE MATERIALIZED VIEW

[mohaidoss]

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What Happened

Parsing with the ClickHouse dialect seems broken. It fails immediately, no further linting/parsing happens.

The parsing errors at the beginning of the file, with !! Expected: "<Delimited: [<Ref: 'StatementSegment'>]>"

Expected Behaviour

The file is valid, as it can run on ClickHouse with no issue. It shouldn't raise any parsing errors.

Observed Behaviour

As shown in the screenshot above, I receive the following parsing error:

[L:  1, P:  1]      |file:
[L:  1, P:  1]      |    unparsable:                                               !! Expected: "<Delimited: [<Ref: 'StatementSegment'>]>"
[L:  1, P:  1]      |        word:                                                 'CREATE'
[L:  1, P:  7]      |        whitespace:                                           ' '
[L:  1, P:  8]      |        word:                                                 'MATERIALIZED'
[L:  1, P: 20]      |        whitespace:                                           ' '
[L:  1, P: 21]      |        word:                                                 'VIEW'
[L:  1, P: 25]      |        whitespace:                                           ' '
[L:  1, P: 26]      |        word:                                                 'db'
[L:  1, P: 28]      |        dot:                                                  '.'
[L:  1, P: 29]      |        word:                                                 'mv_table'
[L:  1, P: 37]      |        newline:                                              '\n'
[L:  2, P:  1]      |        word:                                                 'ENGINE'
[L:  2, P:  7]      |        whitespace:                                           ' '
[L:  2, P:  8]      |        word:                                                 'MergeTree'
[L:  2, P: 17]      |        newline:                                              '\n'
[L:  3, P:  1]      |        word:                                                 'ORDER'
[L:  3, P:  6]      |        whitespace:                                           ' '
[L:  3, P:  7]      |        word:                                                 'BY'
[L:  3, P:  9]      |        whitespace:                                           ' '
[L:  3, P: 10]      |        word:                                                 'tuple'
[L:  3, P: 15]      |        start_bracket:                                        '('
[L:  3, P: 16]      |        end_bracket:                                          ')'
[L:  3, P: 17]      |        newline:                                              '\n'
[L:  4, P:  1]      |        word:                                                 'AS'
[L:  4, P:  3]      |        whitespace:                                           ' '
[L:  4, P:  4]      |        word:                                                 'SELECT'
[L:  4, P: 10]      |        whitespace:                                           ' '
[L:  4, P: 11]      |        star:                                                 '*'
[L:  4, P: 12]      |        whitespace:                                           ' '
[L:  4, P: 13]      |        word:                                                 'FROM'
[L:  4, P: 17]      |        whitespace:                                           ' '
[L:  4, P: 18]      |        word:                                                 'db'
[L:  4, P: 20]      |        dot:                                                  '.'
[L:  4, P: 21]      |        word:                                                 'table'
[L:  4, P: 26]      |        semicolon:                                            ';'
[L:  4, P: 27]      |    newline:                                                  '\n'
[L:  5, P:  1]      |    [META] end_of_file:

==== parsing violations ====
L:   1 | P:   1 |  PRS | Line 1, Position 1: Found unparsable section: 'CREATE MATERIALIZED
                       | VIEW db.mv_table\nENG...'
WARNING: Parsing errors found and dialect is set to 'clickhouse'. Have you configured your dialect correctly?

How to reproduce

With a test.sql containing:

CREATE MATERIALIZED VIEW db.mv_table
ENGINE MergeTree
ORDER BY tuple()
AS SELECT * FROM db.table;

Run

sqlfluff parse test.sql --dialect clickhouse

Dialect

clickhouse

Version

3.0.3

Configuration

.sqlfluff

[sqlfluff]
large_file_skip_byte_limit = 0

Are you willing to work on and submit a PR to address the issue?

• Yes I am willing to submit a PR!

Code of Conduct

• I agree to follow this project's Code of Conduct