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#include <Parsers/ASTDropIndexQuery.h>
#include <Parsers/ASTIdentifier.h>
#include <Parsers/CommonParsers.h>
#include <Parsers/ExpressionElementParsers.h>
#include <Parsers/ParserDropIndexQuery.h>
#include <Parsers/parseDatabaseAndTableName.h>
namespace DB
{
bool ParserDropIndexQuery::parseImpl(IParser::Pos & pos, ASTPtr & node, Expected & expected)
{
auto query = std::make_shared<ASTDropIndexQuery>();
node = query;
ParserKeyword s_drop("DROP");
ParserKeyword s_index("INDEX");
ParserKeyword s_on("ON");
ParserKeyword s_if_exists("IF EXISTS");
ParserIdentifier index_name_p;
String cluster_str;
bool if_exists = false;
if (!s_drop.ignore(pos, expected))
return false;
if (!s_index.ignore(pos, expected))
return false;
if (s_if_exists.ignore(pos, expected))
if_exists = true;
if (!index_name_p.parse(pos, query->index_name, expected))
return false;
/// ON [db.] table_name
if (!s_on.ignore(pos, expected))
return false;
if (!parseDatabaseAndTableAsAST(pos, expected, query->database, query->table))
return false;
/// [ON cluster_name]
if (s_on.ignore(pos, expected))
{
if (!ASTQueryWithOnCluster::parse(pos, cluster_str, expected))
return false;
query->cluster = std::move(cluster_str);
}
if (query->index_name)
query->children.push_back(query->index_name);
query->if_exists = if_exists;
if (query->database)
query->children.push_back(query->database);
if (query->table)
query->children.push_back(query->table);
return true;
}
}
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