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051dddd8df
Goes from rebuilding 483 objects to 165 when it's modified
128 lines
3.4 KiB
C++
128 lines
3.4 KiB
C++
#include <Parsers/TablePropertiesQueriesASTs.h>
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#include <Parsers/CommonParsers.h>
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#include <Parsers/ParserTablePropertiesQuery.h>
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#include <Common/typeid_cast.h>
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namespace DB
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{
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bool ParserTablePropertiesQuery::parseImpl(Pos & pos, ASTPtr & node, Expected & expected)
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{
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ParserKeyword s_exists("EXISTS");
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ParserKeyword s_temporary("TEMPORARY");
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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_database("DATABASE");
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ParserKeyword s_table("TABLE");
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ParserKeyword s_view("VIEW");
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ParserKeyword s_dictionary("DICTIONARY");
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ParserToken s_dot(TokenType::Dot);
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ParserIdentifier name_p(true);
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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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bool parse_only_database_name = false;
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bool parse_show_create_view = false;
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bool exists_view = false;
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bool temporary = false;
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if (s_exists.ignore(pos, expected))
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{
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if (s_database.ignore(pos, expected))
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{
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query = std::make_shared<ASTExistsDatabaseQuery>();
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parse_only_database_name = true;
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}
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else if (s_view.ignore(pos, expected))
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{
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query = std::make_shared<ASTExistsViewQuery>();
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exists_view = true;
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}
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else
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{
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if (s_temporary.ignore(pos, expected))
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temporary = true;
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if (s_table.checkWithoutMoving(pos, expected))
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query = std::make_shared<ASTExistsTableQuery>();
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else if (s_dictionary.checkWithoutMoving(pos, expected))
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query = std::make_shared<ASTExistsDictionaryQuery>();
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else
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query = std::make_shared<ASTExistsTableQuery>();
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}
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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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if (s_database.ignore(pos, expected))
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{
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parse_only_database_name = true;
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query = std::make_shared<ASTShowCreateDatabaseQuery>();
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}
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else if (s_dictionary.checkWithoutMoving(pos, expected))
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query = std::make_shared<ASTShowCreateDictionaryQuery>();
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else if (s_view.ignore(pos, expected))
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{
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query = std::make_shared<ASTShowCreateViewQuery>();
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parse_show_create_view = true;
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}
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else
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query = std::make_shared<ASTShowCreateTableQuery>();
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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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if (parse_only_database_name)
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{
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if (!name_p.parse(pos, database, expected))
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return false;
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}
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else
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{
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if (!(exists_view || parse_show_create_view))
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{
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if (temporary || s_temporary.ignore(pos, expected))
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query->temporary = true;
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if (!s_table.ignore(pos, expected))
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s_dictionary.ignore(pos, expected);
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}
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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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}
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query->database = database;
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query->table = table;
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if (database)
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query->children.push_back(database);
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if (table)
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query->children.push_back(table);
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node = query;
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return true;
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}
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}
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