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101 lines
2.0 KiB
C++
101 lines
2.0 KiB
C++
#include <DB/Parsers/ASTIdentifier.h>
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#include <DB/Parsers/ASTDropQuery.h>
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#include <DB/Parsers/CommonParsers.h>
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#include <DB/Parsers/ParserDropQuery.h>
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namespace DB
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{
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bool ParserDropQuery::parseImpl(Pos & pos, Pos end, ASTPtr & node, String & expected)
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{
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Pos begin = pos;
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ParserWhiteSpaceOrComments ws;
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ParserString s_drop("DROP", true, true);
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ParserString s_detach("DETACH", true, true);
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ParserString s_table("TABLE", true, true);
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ParserString s_database("DATABASE", true, true);
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ParserString s_dot(".");
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ParserString s_if("IF", true, true);
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ParserString s_exists("EXISTS", true, true);
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ParserIdentifier name_p;
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ASTPtr database;
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ASTPtr table;
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bool detach = false;
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bool if_exists = false;
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ws.ignore(pos, end);
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if (!s_drop.ignore(pos, end, expected))
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{
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if (s_detach.ignore(pos, end, expected))
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detach = true;
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else
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return false;
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}
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ws.ignore(pos, end);
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if (s_database.ignore(pos, end, expected))
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{
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ws.ignore(pos, end);
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if (s_if.ignore(pos, end, expected)
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&& ws.ignore(pos, end)
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&& s_exists.ignore(pos, end, expected)
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&& ws.ignore(pos, end))
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if_exists = true;
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if (!name_p.parse(pos, end, 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 (!s_table.ignore(pos, end, expected))
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return false;
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ws.ignore(pos, end);
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if (s_if.ignore(pos, end, expected)
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&& ws.ignore(pos, end)
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&& s_exists.ignore(pos, end, expected)
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&& ws.ignore(pos, end))
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if_exists = true;
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if (!name_p.parse(pos, end, table, 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, expected))
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{
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database = table;
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if (!name_p.parse(pos, end, table, expected))
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return false;
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ws.ignore(pos, end);
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}
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}
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ws.ignore(pos, end);
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ASTDropQuery * query = new ASTDropQuery(StringRange(begin, pos));
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node = query;
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query->detach = detach;
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query->if_exists = if_exists;
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if (database)
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query->database = dynamic_cast<ASTIdentifier &>(*database).name;
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if (table)
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query->table = dynamic_cast<ASTIdentifier &>(*table).name;
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return true;
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}
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}
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