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#include <Parsers/MySQL/ASTDeclarePartitionOptions.h>
#include <Parsers/ASTLiteral.h>
#include <Parsers/ASTSelectWithUnionQuery.h>
#include <Parsers/CommonParsers.h>
#include <Parsers/ExpressionElementParsers.h>
#include <Parsers/ExpressionListParsers.h>
#include <Parsers/MySQL/ASTDeclarePartition.h>
namespace DB
{
namespace MySQLParser
{
ASTPtr ASTDeclarePartitionOptions::clone() const
{
auto res = std::make_shared<ASTDeclarePartitionOptions>(*this);
res->children.clear();
if (partition_numbers)
{
res->partition_numbers = partition_numbers->clone();
res->children.emplace_back(res->partition_numbers);
}
if (partition_expression)
{
res->partition_expression = partition_expression->clone();
res->children.emplace_back(res->partition_expression);
}
if (subpartition_numbers)
{
res->subpartition_numbers = subpartition_numbers->clone();
res->children.emplace_back(res->subpartition_numbers);
}
if (subpartition_expression)
{
res->subpartition_expression = subpartition_expression->clone();
res->children.emplace_back(res->subpartition_expression);
}
return res;
}
static inline bool parsePartitionExpression(IParser::Pos & pos, std::string & type, ASTPtr & node, Expected & expected, bool subpartition = false)
{
ASTPtr expression;
ParserExpression p_expression;
if (!subpartition && ParserKeyword("LIST").ignore(pos, expected))
{
type = "list";
ParserKeyword("COLUMNS").ignore(pos, expected);
if (!p_expression.parse(pos, expression, expected))
return false;
}
else if (!subpartition && ParserKeyword("RANGE").ignore(pos, expected))
{
type = "range";
ParserKeyword("COLUMNS").ignore(pos, expected);
if (!p_expression.parse(pos, expression, expected))
return false;
}
else
{
if (ParserKeyword("LINEAR").ignore(pos, expected))
type = "linear_";
if (ParserKeyword("KEY").ignore(pos, expected))
{
type += "key";
if (ParserKeyword("ALGORITHM").ignore(pos, expected))
{
if (!ParserToken(TokenType::Equals).ignore(pos, expected))
return false;
ASTPtr algorithm;
ParserLiteral p_literal;
if (!p_literal.parse(pos, algorithm, expected) || !algorithm->as<ASTLiteral>())
return false;
UInt64 algorithm_type = algorithm->as<ASTLiteral>()->value.safeGet<UInt64>();
if (algorithm_type != 1 && algorithm_type != 2)
return false;
type += "_" + toString(algorithm_type);
}
if (!p_expression.parse(pos, expression, expected))
return false;
}
else if (ParserKeyword("HASH").ignore(pos, expected))
{
type += "hash";
if (!p_expression.parse(pos, expression, expected))
return false;
}
else
return false;
}
node = expression;
return true;
}
bool ParserDeclarePartitionOptions::parseImpl(Pos & pos, ASTPtr & node, Expected & expected)
{
String partition_type;
ASTPtr partition_numbers;
ASTPtr partition_expression;
String subpartition_type;
ASTPtr subpartition_numbers;
ASTPtr subpartition_expression;
ASTPtr declare_partitions;
if (!ParserKeyword("PARTITION BY").ignore(pos, expected))
return false;
if (!parsePartitionExpression(pos, partition_type, partition_expression, expected))
return false;
if (ParserKeyword("PARTITIONS").ignore(pos, expected))
{
ParserLiteral p_literal;
if (!p_literal.parse(pos, partition_numbers, expected))
return false;
}
if (ParserKeyword("SUBPARTITION BY").ignore(pos, expected))
{
if (!parsePartitionExpression(pos, subpartition_type, subpartition_expression, expected, true))
return false;
if (ParserKeyword("SUBPARTITIONS").ignore(pos, expected))
{
ParserLiteral p_literal;
if (!p_literal.parse(pos, subpartition_numbers, expected))
return false;
}
}
if (ParserToken(TokenType::OpeningRoundBracket).ignore(pos, expected))
{
if (!ParserList(std::make_unique<ParserDeclarePartition>(), std::make_unique<ParserToken>(TokenType::Comma))
.parse(pos, declare_partitions, expected))
return false;
if (!ParserToken(TokenType::ClosingRoundBracket).ignore(pos, expected))
return false;
}
auto declare_partition_options = std::make_shared<ASTDeclarePartitionOptions>();
declare_partition_options->partition_type = partition_type;
declare_partition_options->partition_numbers = partition_numbers;
declare_partition_options->partition_expression = partition_expression;
declare_partition_options->subpartition_type = subpartition_type;
declare_partition_options->subpartition_numbers = subpartition_numbers;
declare_partition_options->subpartition_expression = subpartition_expression;
declare_partition_options->declare_partitions = declare_partitions;
if (declare_partition_options->partition_numbers)
declare_partition_options->children.emplace_back(declare_partition_options->partition_numbers);
if (declare_partition_options->partition_expression)
declare_partition_options->children.emplace_back(declare_partition_options->partition_expression);
if (declare_partition_options->subpartition_numbers)
declare_partition_options->children.emplace_back(declare_partition_options->subpartition_numbers);
if (declare_partition_options->subpartition_expression)
declare_partition_options->children.emplace_back(declare_partition_options->subpartition_expression);
if (declare_partition_options->declare_partitions)
declare_partition_options->children.emplace_back(declare_partition_options->declare_partitions);
node = declare_partition_options;
return true;
}
}
}
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