2017-04-01 09:19:00 +00:00
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#include <Parsers/ASTIdentifier.h>
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#include <Parsers/TablePropertiesQueriesASTs.h>
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2012-12-15 03:09:04 +00:00
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2017-04-01 09:19:00 +00:00
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#include <Parsers/CommonParsers.h>
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#include <Parsers/ParserTablePropertiesQuery.h>
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2012-12-15 03:09:04 +00:00
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2017-04-01 09:19:00 +00:00
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#include <Common/typeid_cast.h>
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2016-11-20 12:43:20 +00:00
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2012-12-15 03:09:04 +00:00
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namespace DB
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{
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2017-07-10 03:28:12 +00:00
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bool ParserTablePropertiesQuery::parseImpl(Pos & pos, ASTPtr & node, Expected & expected)
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2012-12-15 03:09:04 +00:00
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{
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Pos begin = pos;
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2012-12-15 03:09:04 +00:00
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2017-06-18 03:07:03 +00:00
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ParserKeyword s_exists("EXISTS");
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ParserKeyword s_describe("DESCRIBE");
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ParserKeyword s_desc("DESC");
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ParserKeyword s_show("SHOW");
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ParserKeyword s_create("CREATE");
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ParserKeyword s_table("TABLE");
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ParserToken s_dot(TokenType::Dot);
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ParserIdentifier name_p;
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ASTPtr database;
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ASTPtr table;
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std::shared_ptr<ASTQueryWithTableAndOutput> query;
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2012-12-15 03:09:04 +00:00
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if (s_exists.ignore(pos, expected))
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{
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query = std::make_shared<ASTExistsQuery>();
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}
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else if (s_describe.ignore(pos, expected) || s_desc.ignore(pos, expected))
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{
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query = std::make_shared<ASTDescribeQuery>();
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}
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else if (s_show.ignore(pos, expected))
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{
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if (!s_create.ignore(pos, expected))
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return false;
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2014-06-26 00:58:14 +00:00
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2017-04-01 07:20:54 +00:00
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query = 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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2014-06-26 00:58:14 +00:00
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2017-07-10 03:28:12 +00:00
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s_table.ignore(pos, expected);
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2012-12-15 03:09:04 +00:00
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if (!name_p.parse(pos, table, expected))
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return false;
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if (s_dot.ignore(pos, expected))
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{
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database = table;
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if (!name_p.parse(pos, table, expected))
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return false;
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}
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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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node = query;
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return true;
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2012-12-15 03:09:04 +00:00
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}
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}
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