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Fix typo in visitor.md (#11825) 

Signed-off-by: Jael Gu <mengjia.gu@zilliz.com>
pull/11846/head
Jael Gu 2021-11-15 19:49:52 +08:00 committed by GitHub
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docs/design_docs/segcore/visitor.md
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@ -11,7 +11,7 @@ Visitor Pattern is used in segcore for parse and execute Execution Plan.
4. `LogicalBinaryExpr` support and/or
5. `LogicalUnaryExpr` support not
Currently , under `${core/query/visitors}` directory, there are following visitors
Currently, under `${core/query/visitors}` directory, there are following visitors:
1. `ShowPlanNodeVisitor` print PlanNode in json
2. `ShowExprVisitor` Expr -> json
3. `Verify...Visitor` validate ...