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谓词下推造成 T_OP_ROW 共享

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akaError
2024-02-22 02:16:31 +00:00
committed by ob-robot
parent 5b850564f4
commit d1037b0b56
3 changed files with 83 additions and 18 deletions
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37
src/sql/resolver/expr/ob_raw_expr_copier.h
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@ -219,6 +219,43 @@ int ObRawExprCopier::add_skipped_expr(const ObIArray<T *> &targets, bool include
return ret;
}
/**
* ReplaceExprByType is used to generate new expr when contain some special type node
* as following case, when we need to copy a medium expr: T_OP_ROW, need to deep copy parents
* expr:(c1,c2)!=(1,2)
* ReplaceExprByType(T_OP_ROW)
* old expr:(c1,c2)!=(1,2) new expr:(c1,c2)!=(1,2)
* T_OP_NE T_OP_NE(new)
* T_OP_ROW T_OP_ROW (new)T_OP_ROW T_OP_ROW(new)
* c1 c2 const(1) const(2) (old)c1 (old)c2 (old)const(1) const(2)(old)
*/
class ReplaceExprByType : public ObIRawExprReplacer
{
public:
ReplaceExprByType(ObItemType expr_type) : expr_type_(expr_type) {}
virtual int generate_new_expr(ObRawExprFactory &expr_factory,
ObRawExpr *old_expr,
ObRawExpr *&new_expr)
{
int ret = OB_SUCCESS;
if (OB_ISNULL(old_expr)) {
ret = OB_ERR_UNEXPECTED;
SQL_RESV_LOG(WARN, "old expr is null", K(ret));
} else if (old_expr->get_expr_type() == expr_type_) {
if (OB_FAIL(ObRawExprCopier::copy_expr_node(expr_factory,
old_expr,
new_expr))) {
SQL_RESV_LOG(WARN, "failed to copy calc urowid expr", K(ret));
} else if (OB_ISNULL(new_expr)) {
ret = OB_ERR_UNEXPECTED;
SQL_RESV_LOG(WARN, "failed to build new calc rowid expr", K(ret));
}
}
return ret;
}
ObItemType expr_type_;
};
}
}