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https://github.com/ClickHouse/ClickHouse.git
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99 lines
2.2 KiB
C++
99 lines
2.2 KiB
C++
#include <DB/Parsers/ASTIdentifier.h>
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#include <DB/Parsers/TablePropertiesQueriesASTs.h>
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#include <DB/Parsers/CommonParsers.h>
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#include <DB/Parsers/ParserTablePropertiesQuery.h>
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#include <DB/Common/typeid_cast.h>
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namespace DB
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{
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bool ParserTablePropertiesQuery::parseImpl(Pos & pos, Pos end, ASTPtr & node, Pos & max_parsed_pos, Expected & expected)
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{
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Pos begin = pos;
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ParserString s_exists("EXISTS", true, true);
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ParserString s_describe("DESCRIBE", true, true);
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ParserString s_desc("DESC", true, true);
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ParserString s_show("SHOW", true, true);
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ParserString s_create("CREATE", true, true);
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ParserString s_table("TABLE", true, true);
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ParserString s_dot(".");
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ParserIdentifier name_p;
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ASTPtr database;
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ASTPtr table;
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ASTPtr query_ptr;
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ws.ignore(pos, end);
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if (s_exists.ignore(pos, end, max_parsed_pos, expected))
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{
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query_ptr = std::make_shared<ASTExistsQuery>();
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}
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else if (s_describe.ignore(pos, end, max_parsed_pos, expected) || s_desc.ignore(pos, end, max_parsed_pos, expected))
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{
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query_ptr = std::make_shared<ASTDescribeQuery>();
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}
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else if (s_show.ignore(pos, end, max_parsed_pos, expected))
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{
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ws.ignore(pos, end);
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if (!s_create.ignore(pos, end, max_parsed_pos, expected))
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return false;
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query_ptr = std::make_shared<ASTShowCreateQuery>();
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}
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else
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{
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return false;
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}
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ASTQueryWithTableAndOutput * query = dynamic_cast<ASTQueryWithTableAndOutput *>(&*query_ptr);
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ws.ignore(pos, end);
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s_table.ignore(pos, end, max_parsed_pos, expected);
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ws.ignore(pos, end);
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if (!name_p.parse(pos, end, table, max_parsed_pos, expected))
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return false;
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ws.ignore(pos, end);
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if (s_dot.ignore(pos, end, max_parsed_pos, expected))
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{
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database = table;
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if (!name_p.parse(pos, end, table, max_parsed_pos, expected))
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return false;
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ws.ignore(pos, end);
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}
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ws.ignore(pos, end);
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/// FORMAT format_name
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if (!parseFormat(*query, pos, end, node, max_parsed_pos, expected))
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return false;
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query->range = StringRange(begin, pos);
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if (database)
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query->database = typeid_cast<ASTIdentifier &>(*database).name;
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if (table)
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query->table = typeid_cast<ASTIdentifier &>(*table).name;
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if (query->format)
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query->children.push_back(query->format);
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node = query_ptr;
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return true;
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}
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}
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