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Rewrite lookup index selection implementation #1188
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yixinglu
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Really big change, could provide an overview explanation? |
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of course, here is some thoughts when implementing this PR. I'll refine this document later. |
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CPWstatic
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if (!getIndexColumnHintInExpr(field, expr, &hint, &operands)) { | ||
break; | ||
} | ||
result.hints.emplace_back(std::move(hint)); | ||
for (auto op : operands) { | ||
usedOperands.insert(op); | ||
} |
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Could give some comments? If the first column is EQ logic expression, the error will be returned via line 775?
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EQ expression is relational expression, this case will be handled by selectRelExprIndex
function.
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closes #1061