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extern void pull_up_sublinks(PlannerInfo *root);
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extern void inline_set_returning_functions(PlannerInfo *root);
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extern Node *pull_up_subqueries(PlannerInfo *root, Node *jtnode,
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extern void reduce_outer_joins(PlannerInfo *root);
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extern Relids get_relids_in_jointree(Node *jtnode, bool include_joins);
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extern Relids get_relids_for_join(PlannerInfo *root, int joinrelid);