dfcbb30a92
This patch can be viewed as combination of two parts: 1) Enabling '-' in the path so that the parser does not give out a warning. 2) Setting the negative index to a correct value and returning the appropriate value. 1) To enable using the negative index in the path: To make the parser not return warning when negative index is used in path '-' needs to be allowed in json path characters. P_NEG is added to enable this and is made recognizable by setting the 45th index of json_path_chr_map[] to P_NEG (instead of previous P_ETC) because 45 corresponds to '-' in unicode. When the path is being parsed and '-' is encountered, the parser should recognize it as parsing '-' sign, so a new json state PS_NEG is required. When the state is PS_NEG, it means that a negative integer is going to be parsed so set is_negative_index of current step to 1 and n_item is set accordingly when integer is encountered after '-'. Next proceed with parsing rest of the path and get the correct path. Next thing is parsing the json and returning correct value. 2) Setting the negative index to a correct value and returning the value: While parsing json if we encounter array and the path step for the array is a negative index (n_item < 0), then we can count the number of elements in the array and set n_item to correct corresponding value. This is done in json_skip_array_and_count.
Code status:
ci.appveyor.com
MariaDB: The open source relational database
MariaDB was designed as a drop-in replacement of MySQL(R) with more features, new storage engines, fewer bugs, and better performance.
MariaDB is brought to you by the MariaDB Foundation and the MariaDB Corporation. Please read the CREDITS file for details about the MariaDB Foundation, and who is developing MariaDB.
MariaDB is developed by many of the original developers of MySQL who now work for the MariaDB Corporation, the MariaDB Foundation and by many people in the community.
MySQL, which is the base of MariaDB, is a product and trademark of Oracle Corporation, Inc. For a list of developers and other contributors, see the Credits appendix. You can also run 'SHOW authors' to get a list of active contributors.
A description of the MariaDB project and a manual can be found at:
https://mariadb.com/kb/en/mariadb-vs-mysql-features/
https://mariadb.com/kb/en/mariadb-versus-mysql-compatibility/
https://mariadb.com/kb/en/new-and-old-releases/
Help
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New contributors can ask questions any time, but we will provide immediate feedback during that interval.
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NOTE:
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License information can be found in the COPYING file. Third party license information can be found in the THIRDPARTY file.
Bug Reports
Bug and/or error reports regarding MariaDB should be submitted at: https://jira.mariadb.org
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