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96 lines
2.4 KiB
C++
96 lines
2.4 KiB
C++
#include <math.h>
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#include <DataStreams/IProfilingBlockInputStream.h>
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#include <DataStreams/IBlockInputStream.h>
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namespace DB
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{
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namespace ErrorCodes
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{
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extern const int TOO_DEEP_PIPELINE;
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}
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/** It's safe to access children without mutex as long as these methods are called before first call to read, readPrefix.
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*/
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String IBlockInputStream::getTreeID() const
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{
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std::stringstream s;
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s << getName();
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if (!children.empty())
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{
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s << "(";
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for (BlockInputStreams::const_iterator it = children.begin(); it != children.end(); ++it)
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{
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if (it != children.begin())
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s << ", ";
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s << (*it)->getTreeID();
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}
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s << ")";
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}
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return s.str();
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}
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size_t IBlockInputStream::checkDepth(size_t max_depth) const
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{
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return checkDepthImpl(max_depth, max_depth);
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}
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size_t IBlockInputStream::checkDepthImpl(size_t max_depth, size_t level) const
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{
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if (children.empty())
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return 0;
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if (level > max_depth)
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throw Exception("Query pipeline is too deep. Maximum: " + toString(max_depth), ErrorCodes::TOO_DEEP_PIPELINE);
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size_t res = 0;
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for (BlockInputStreams::const_iterator it = children.begin(); it != children.end(); ++it)
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{
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size_t child_depth = (*it)->checkDepth(level + 1);
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if (child_depth > res)
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res = child_depth;
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}
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return res + 1;
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}
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void IBlockInputStream::dumpTree(std::ostream & ostr, size_t indent, size_t multiplier)
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{
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ostr << String(indent, ' ') << getName();
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if (multiplier > 1)
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ostr << " × " << multiplier;
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//ostr << ": " << getHeader().dumpStructure();
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ostr << std::endl;
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++indent;
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/// If the subtree is repeated several times, then we output it once with the multiplier.
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using Multipliers = std::map<String, size_t>;
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Multipliers multipliers;
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for (BlockInputStreams::const_iterator it = children.begin(); it != children.end(); ++it)
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++multipliers[(*it)->getTreeID()];
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for (BlockInputStreams::iterator it = children.begin(); it != children.end(); ++it)
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{
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String id = (*it)->getTreeID();
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size_t & subtree_multiplier = multipliers[id];
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if (subtree_multiplier != 0) /// Already printed subtrees are marked with zero in the array of multipliers.
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{
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(*it)->dumpTree(ostr, indent, subtree_multiplier);
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subtree_multiplier = 0;
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}
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}
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}
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}
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