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#include <Parsers/ParserOptimizeQuery.h>
#include <Parsers/ParserPartition.h>
#include <Parsers/CommonParsers.h>
#include <Parsers/ASTOptimizeQuery.h>
#include <Parsers/ExpressionListParsers.h>
namespace DB
{
bool ParserOptimizeQueryColumnsSpecification::parseImpl(Pos & pos, ASTPtr & node, Expected & expected)
{
// Do not allow APPLY and REPLACE transformers.
// Since we use Columns Transformers only to get list of columns,
// we can't actually modify content of the columns for deduplication.
const auto allowed_transformers = ParserColumnsTransformers::ColumnTransformers{ParserColumnsTransformers::ColumnTransformer::EXCEPT};
return ParserColumnsMatcher(allowed_transformers).parse(pos, node, expected)
|| ParserAsterisk(allowed_transformers).parse(pos, node, expected)
|| ParserIdentifier(false).parse(pos, node, expected);
}
bool ParserOptimizeQuery::parseImpl(Pos & pos, ASTPtr & node, Expected & expected)
{
ParserKeyword s_optimize_table("OPTIMIZE TABLE");
ParserKeyword s_partition("PARTITION");
ParserKeyword s_final("FINAL");
ParserKeyword s_deduplicate("DEDUPLICATE");
ParserKeyword s_cleanup("CLEANUP");
ParserKeyword s_by("BY");
ParserToken s_dot(TokenType::Dot);
ParserIdentifier name_p(true);
ParserPartition partition_p;
ASTPtr database;
ASTPtr table;
ASTPtr partition;
bool final = false;
bool deduplicate = false;
bool cleanup = false;
String cluster_str;
if (!s_optimize_table.ignore(pos, expected))
return false;
if (!name_p.parse(pos, table, expected))
return false;
if (s_dot.ignore(pos, expected))
{
database = table;
if (!name_p.parse(pos, table, expected))
return false;
}
if (ParserKeyword{"ON"}.ignore(pos, expected) && !ASTQueryWithOnCluster::parse(pos, cluster_str, expected))
return false;
if (s_partition.ignore(pos, expected))
{
if (!partition_p.parse(pos, partition, expected))
return false;
}
if (s_final.ignore(pos, expected))
final = true;
if (s_deduplicate.ignore(pos, expected))
deduplicate = true;
if (s_cleanup.ignore(pos, expected))
cleanup = true;
ASTPtr deduplicate_by_columns;
if (deduplicate && s_by.ignore(pos, expected))
{
if (!ParserList(std::make_unique<ParserOptimizeQueryColumnsSpecification>(), std::make_unique<ParserToken>(TokenType::Comma), false)
.parse(pos, deduplicate_by_columns, expected))
return false;
}
auto query = std::make_shared<ASTOptimizeQuery>();
node = query;
query->cluster = cluster_str;
if ((query->partition = partition))
query->children.push_back(partition);
query->final = final;
query->deduplicate = deduplicate;
query->deduplicate_by_columns = deduplicate_by_columns;
query->cleanup = cleanup;
query->database = database;
query->table = table;
if (database)
query->children.push_back(database);
if (table)
query->children.push_back(table);
return true;
}
}
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