mirror of
https://github.com/ClickHouse/ClickHouse.git
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150 lines
3.6 KiB
C++
150 lines
3.6 KiB
C++
#include <IO/WriteBufferFromOStream.h>
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#include <IO/WriteBufferFromString.h>
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#include <IO/WriteHelpers.h>
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#include <IO/Operators.h>
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#include <Common/SipHash.h>
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#include <Parsers/IAST.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_BIG_AST;
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extern const int TOO_DEEP_AST;
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extern const int BAD_ARGUMENTS;
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}
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const char * IAST::hilite_keyword = "\033[1m";
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const char * IAST::hilite_identifier = "\033[0;36m";
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const char * IAST::hilite_function = "\033[0;33m";
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const char * IAST::hilite_operator = "\033[1;33m";
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const char * IAST::hilite_alias = "\033[0;32m";
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const char * IAST::hilite_substitution = "\033[1;36m";
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const char * IAST::hilite_none = "\033[0m";
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size_t IAST::size() const
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{
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size_t res = 1;
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for (const auto & child : children)
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res += child->size();
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return res;
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}
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size_t IAST::checkSize(size_t max_size) const
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{
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size_t res = 1;
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for (const auto & child : children)
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res += child->checkSize(max_size);
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if (res > max_size)
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throw Exception("AST is too big. Maximum: " + toString(max_size), ErrorCodes::TOO_BIG_AST);
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return res;
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}
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IAST::Hash IAST::getTreeHash() const
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{
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SipHash hash_state;
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updateTreeHash(hash_state);
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IAST::Hash res;
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hash_state.get128(res.first, res.second);
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return res;
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}
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void IAST::updateTreeHash(SipHash & hash_state) const
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{
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updateTreeHashImpl(hash_state);
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hash_state.update(children.size());
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for (const auto & child : children)
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child->updateTreeHash(hash_state);
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}
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void IAST::updateTreeHashImpl(SipHash & hash_state) const
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{
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auto id = getID();
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hash_state.update(id.data(), id.size());
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}
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size_t IAST::checkDepthImpl(size_t max_depth, size_t level) const
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{
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size_t res = level + 1;
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for (const auto & child : children)
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{
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if (level >= max_depth)
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throw Exception("AST is too deep. Maximum: " + toString(max_depth), ErrorCodes::TOO_DEEP_AST);
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res = std::max(res, child->checkDepthImpl(max_depth, level + 1));
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}
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return res;
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}
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void IAST::cloneChildren()
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{
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for (auto & child : children)
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child = child->clone();
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}
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String IAST::getColumnName() const
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{
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WriteBufferFromOwnString write_buffer;
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appendColumnName(write_buffer);
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return write_buffer.str();
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}
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void IAST::FormatSettings::writeIdentifier(const String & name) const
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{
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WriteBufferFromOStream out(ostr, 32);
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switch (identifier_quoting_style)
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{
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case IdentifierQuotingStyle::None:
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{
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if (always_quote_identifiers)
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throw Exception("Incompatible arguments: always_quote_identifiers = true && identifier_quoting_style == IdentifierQuotingStyle::None",
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ErrorCodes::BAD_ARGUMENTS);
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writeString(name, out);
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break;
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}
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case IdentifierQuotingStyle::Backticks:
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{
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if (always_quote_identifiers)
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writeBackQuotedString(name, out);
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else
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writeProbablyBackQuotedString(name, out);
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break;
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}
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case IdentifierQuotingStyle::DoubleQuotes:
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{
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if (always_quote_identifiers)
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writeDoubleQuotedString(name, out);
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else
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writeProbablyDoubleQuotedString(name, out);
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break;
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}
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case IdentifierQuotingStyle::BackticksMySQL:
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{
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if (always_quote_identifiers)
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writeBackQuotedStringMySQL(name, out);
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else
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writeProbablyBackQuotedStringMySQL(name, out);
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break;
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}
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}
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out.next();
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}
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}
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