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* CLICKHOUSE-4063: less manual html @ index.md * CLICKHOUSE-4063: recommend markdown="1" in README.md * CLICKHOUSE-4003: manually purge custom.css for now * CLICKHOUSE-4064: expand <details> before any print (including to pdf) * CLICKHOUSE-3927: rearrange interfaces/formats.md a bit * CLICKHOUSE-3306: add few http headers * Remove copy-paste introduced in #3392 * Hopefully better chinese fonts #3392 * get rid of tabs @ custom.css * Apply comments and patch from #3384 * Add jdbc.md to ToC and some translation, though it still looks badly incomplete * minor punctuation * Add some backlinks to official website from mirrors that just blindly take markdown sources * Do not make fonts extra light * find . -name '*.md' -type f | xargs -I{} perl -pi -e 's//g' {} * find . -name '*.md' -type f | xargs -I{} perl -pi -e 's/ sql/g' {} * Remove outdated stuff from roadmap.md * Not so light font on front page too * Refactor Chinese formats.md to match recent changes in other languages * Update some links on front page * Remove some outdated comment * Add twitter link to front page * More front page links tuning * Add Amsterdam meetup link * Smaller font to avoid second line * Add Amsterdam link to README.md * Proper docs nav translation * Back to 300 font-weight except Chinese * fix docs build * Update Amsterdam link * remove symlinks * more zh punctuation * apply lost comment by @zhang2014 * Apply comments by @zhang2014 from #3417 * Remove Beijing link * rm incorrect symlink * restore content of docs/zh/operations/table_engines/index.md * CLICKHOUSE-3751: stem terms while searching docs * CLICKHOUSE-3751: use English stemmer in non-English docs too * CLICKHOUSE-4135 fix * Remove past meetup link * Add blog link to top nav * Add ContentSquare article link * Add form link to front page + refactor some texts * couple markup fixes * minor * Introduce basic ODBC driver page in docs * More verbose 3rd party libs disclaimer * Put third-party stuff into a separate folder * Separate third-party stuff in ToC too * Update links * Move stuff that is not really (only) a client library into a separate page * Add clickhouse-hdfs-loader link * Some introduction for "interfaces" section * Rewrite tcp.md * http_interface.md -> http.md * fix link * Remove unconvenient error for now * try to guess anchor instead of failing * remove symlink * Remove outdated info from introduction * remove ru roadmap.md * replace ru roadmap.md with symlink * Update roadmap.md * lost file * Title case in toc_en.yml * Sync "Functions" ToC section with en * Remove reference to pretty old ClickHouse release from docs * couple lost symlinks in fa
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Permissions for queries
Queries in ClickHouse can be divided into several groups:
- Read data queries:
SELECT,SHOW,DESCRIBE,EXISTS. - Write data queries:
INSERT,OPTIMIZE. - Change settings queries:
SET,USE. - DDL queries:
CREATE,ALTER,RENAME,ATTACH,DETACH,DROPTRUNCATE. - Particular queries:
KILL QUERY.
The following settings regulate user permissions for the groups of queries:
- readonly — Restricts permissions for all groups of queries excepting DDL.
- allow_ddl — Restricts permissions for DDL queries.
KILL QUERY performs with any settings.
readonly
Restricts permissions for read data, write data and change settings queries.
See above for the division of queries into groups.
Possible values
- 0 — All queries are allowed. Default value.
- 1 — Read data queries only are allowed.
- 2 — Read data and change settings queries are allowed.
After setting readonly = 1, a user can't change readonly and allow_ddl settings in the current session.
When using the GET method in the HTTP interface, readonly = 1 is set automatically. To modify data use the POST method.
allow_ddl
Allows/denies DDL queries.
See above for the division of queries into groups.
Possible values
- 0 — DDL queries are not allowed.
- 1 — DDL queries are allowed. Default value.
You can not execute SET allow_ddl = 1 if allow_ddl = 0 for current session.