hyperscan is a high-performance regular expression matching library, but can not be used on ARM.
vectorscan is an ARM port for hyperscan, it can be used as a drop in replacement.
Since hyperscan is original created by Intel and is popular and mature on x86, so we just use vectorscan
only for aarch64 when build thirdparty.
Nereids(new optimizer) code base
Nereids is new query planner for Doris. It include three main parts: parser, analyzer and optimizer.
The parser, generated by ANTLR4, transforms SQL into a logical plan with a tree structure. Analysis and optimization are performed on the logical plan of the tree structure. Each transformation is defined as a rule. The rule is applied to the logical plan using pattern matching. The implementation of the optimizer follows the approach in the Cascades paper.
In #8319, I remove mysql-connector-java dependency because of license incompatibility.
But we need a mysql compatible driver for http query api. So I choose mariadb-java-client,
which is under LGPL.
