[PG12] Optimised Antlr4ResultHandler initialization #1167
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This is similar to #1107 as @dehowef approved here.
Description
As mentioned in issue #1106
This pull request aims to optimize the current implementation of the Antlr4ResultHandler initialization process, resulting in improved query processing time and reduced overhead. Currently, for each query made, the Antlr4ResultHandleris repeatedly initialized, leading to unnecessary performance bottlenecks. To address this issue, we propose initializing the handler only once and then reusing it for subsequent queries.