Accepts CH client queries in the form of
SHOW FUNCTIONS [LIKE | ILIKE '< pattern>']
Retrieves all columns from `functions` table in system database.
Fixes#52757
Implementation:
- Added a new buffer ForkWriteBuffer takes a vector of WriteBuffer and writes data to all of them. It uses the buffer of the first element as its buffer and copies data from first buffer to all the other buffers
Testing:
- Updated tests/queries/0_stateless/02346_into_outfile_and_stdout.sh
Documentation:
- Updated the english documentation for SELECT.. INTO OUTFILE with AND STDOUT.
Implementation:
- Added a bool to ASTQueryWithOutput & patched the usage in ClientBase.
- Added a new buffer TeeWriteBuffer which extends from WriteBufferFromFile (used to write data to the file) and has WriteBufferFromFileDescriptor (used to write data to stdout). The WriteBufferFromFileDescriptor uses the same buffer as TeeWriteBuffer.
- Added a new bool select_into_outfile_and_stdout in ClientBase to enable/disable progress rendering.
Testing:
- Added a test tests/queries/0_stateless/02346_into_outfile_and_stdout.sh
Documentation:
- Updated the english documentation for the new option in SELECT.
Add allow_settings_after_format_in_insert setting, OFF by default.
Signed-off-by: Azat Khuzhin <a.khuzhin@semrush.com>
v2: s/parser_settings_after_format_compact/allow_settings_after_format_in_insert/ (suggested by vitlibar)
v3: replace ParserSettings with a flag (requested by vitlibar)
There are two possible ways to pass the SETTINGS clause:
- SELECT 1 FORMAT Null SETTINGS max_block_size = 1
- SELECT 1 SETTINGS max_block_size = 1[ FORMAT Null]
And when the SETTINGS goes after FORMAT it is parsed in
ParserQueryWithOutput, and these settings are not applied for the query
from the ASTSelectQuery::initSettings()
So propagate settings from the ParserQueryWithOutput to the
ASTSelectQuery settings.
