Optimization: Dispatch Translator by virtual functions instead of swi… #368
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…tch statements (#118) * Optimization: Dispatch Translator by virtual functions instead of switch statements * AppendSpacePrefixed() helper * Refactor ColumnSection * virtual JoinCondition() * Eliminate IfSection * Eliminate InsertSection * LikeSection * BetweenSection * FetchSection * WhileSection * SqlOrder * UpdateSection
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Using Virtual-function dispatching minimizes number of branches, which is a bottleneck in CPU
This approach applied to
SELECTtranslator only as an example.Can be propagated to other frequently used SQL statements
Also: