/* Copyright (C) 2014 InfiniDB, Inc.

   This program is free software; you can redistribute it and/or
   modify it under the terms of the GNU General Public License
   as published by the Free Software Foundation; version 2 of
   the License.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
   MA 02110-1301, USA. */

/***********************************************************************
*   $Id: calpontselectexecutionplan.h 9576 2013-05-29 21:02:11Z zzhu $
*
*
***********************************************************************/
/** @file */

#ifndef CALPONTSELECTEXECUTIONPLAN_H
#define CALPONTSELECTEXECUTIONPLAN_H
#include <vector>
#include <map>
#include <iosfwd>

#include <boost/uuid/uuid.hpp>

#include "exp_templates.h"
#include "calpontexecutionplan.h"
#include "returnedcolumn.h"
#include "filter.h"
#include "expressionparser.h"
#include "calpontsystemcatalog.h"
#include "brmtypes.h"

#ifndef __GNUC__
#  ifndef __attribute__
#    define __attribute__(x)
#  endif
#endif

/**
 * Namespace
 */
namespace execplan
{

enum RM_PARMS
{
    PMSMALLSIDEMEMORY,
    UMSMALLSIDEMEMORY,
};

struct RMParam
{
    RMParam(uint32_t s, uint16_t i, uint64_t v): sessionId(s), id(i), value(v) {}
    RMParam(): sessionId(0), id(0), value(0) {}
    uint32_t sessionId;
    uint16_t id;
    uint64_t value;
};

typedef boost::shared_ptr<CalpontSelectExecutionPlan> SCSEP;

/**
 * @brief A class to represent calpont select execution plan
 *
 * This class is a concrete implementation of a CalpontExecutionPlan
 * specifically describing a SQL select activity.
 */
class CalpontSelectExecutionPlan : public CalpontExecutionPlan
{

    /**
     * Public stuff
     */
public:
    /**
     * Types and constants
     */
    typedef std::vector<SRCP> ReturnedColumnList;
    typedef std::vector<SRCP> GroupByColumnList;
    typedef std::vector<SRCP> OrderByColumnList;
    typedef std::multimap<std::string, SRCP> ColumnMap;
    typedef std::vector<TreeNode*> FilterTokenList;

    typedef expression::expression_parser<Token, ParseTree*, TreeNode*, ExpressionParser> Parser;
    typedef std::vector<CalpontSystemCatalog::TableAliasName> TableList;
    typedef std::vector<SCEP> SelectList;

    typedef std::vector<RMParam> RMParmVec;

    // query type of this select plan.
#undef DELETE //Windows defines this...
    enum IDB_QUERYTYPE
    {
        SELECT,
        UPDATE,
        DELETE,
        INSERT_SELECT,
        CREATE_TABLE,
        DROP_TABLE,
        ALTER_TABLE,
        INSERT,
        LOAD_DATA_INFILE
    };

    enum SE_LOCATION
    {
        MAIN,
        FROM,
        WHERE,
        HAVING
    };

    /** subselect type */
    enum SE_SubSelectType
    {
        MAIN_SELECT,
        SINGLEROW_SUBS,
        EXISTS_SUBS,
        NOT_EXISTS_SUBS,
        IN_SUBS,
        NOT_IN_SUBS,
        ALL_SUBS,
        ANY_SUBS,
        FROM_SUBS,
        SELECT_SUBS,
        UNKNOWN_SUBS
    };

    /**
    * Flags that can be passed to caltraceon().
    */
    enum TRACE_FLAGS
    {
        TRACE_NONE             = 0x0000,	/*!< No tracing */
        TRACE_LOG              = 0x0001,	/*!< Full return of rows, extra debug about query in log */
        TRACE_NO_ROWS1         = 0x0002,	/*!< Same as above, but rows not given to OCI layer */
        TRACE_NO_ROWS2         = 0x0004,	/*!< Same as above, but rows not converted from stream */
        TRACE_NO_ROWS3         = 0x0008,	/*!< Same as above, but rows not sent to DM from UM */
        TRACE_NO_ROWS4         = 0x0010,	/*!< Same as above, but rows not sent to DeliveryStep */
        TRACE_LBIDS            = 0x0020,	/*!< Enable LBID tracing in PrimProc */
        TRACE_PLAN_ONLY        = 0x0040,	/*!< Only generate a serialized CSEP */
        PM_PROFILE             = 0x0080,	/*!< Enable PM profiling in PrimProc */
        IGNORE_CP              = 0x0100,	/*!< Ignore casual partitioning metadata */
        WRITE_TO_FILE          = 0x0200,	/*!< writes table rows out to a file from the Oracle connector */
        NOWRITE_TO_FILE        = 0x0400,	/*!< does not write table rows out to a file from the Oracle connector */
        TRACE_DISKIO_UM        = 0x0800,	/*!< Enable UM disk I/O logging */
        TRACE_RESRCMGR         = 0x1000,	/*!< Trace Resource Manager Usage */
        TRACE_TUPLE_AUTOSWITCH = 0x4000,	/*!< Enable MySQL tuple-to-table auto switch */
        TRACE_TUPLE_OFF        = 0x8000,	/*!< Enable MySQL table interface */
    };

    enum IDB_LOCAL_QUERY
    {
        GLOBAL_QUERY           = 0,	/*!< Standard processing */
        LOCAL_QUERY            = 1,	/*!< Use local ExeMgr and local PrimProc */
        LOCAL_UM               = 2,	/*!< Use local ExeMgr with global PrimProc*/
    };

    /**
     * Constructors
     */
    CalpontSelectExecutionPlan(const int location = MAIN);

    CalpontSelectExecutionPlan(const ReturnedColumnList& returnedCols,
                               ParseTree* filters,
                               const SelectList& subSelects,
                               const GroupByColumnList& groupByCols,
                               ParseTree* having,
                               const OrderByColumnList& orderByCols,
                               const std::string alias,
                               const int location,
                               const bool dependent);

    CalpontSelectExecutionPlan (const std::string data);

    /**
     * Destructors
     */
    virtual ~CalpontSelectExecutionPlan();

    /**
     * Access and mutator methods
     */

    /**
     * returned column list
     */
    const ReturnedColumnList& returnedCols() const
    {
        return fReturnedCols;
    }
    ReturnedColumnList& returnedCols()
    {
        return fReturnedCols;
    }
    void returnedCols (const ReturnedColumnList& returnedCols)
    {
        fReturnedCols = returnedCols;
    }

    /**
     * Are we in local PM only query mode?
     */
    const uint32_t localQuery() const
    {
        return fLocalQuery;
    }
    void localQuery (const uint32_t localQuery)
    {
        fLocalQuery = localQuery;
    }

    /**
     * filters parse tree
     */
    const ParseTree* filters() const
    {
        return fFilters;
    }
    ParseTree* filters()
    {
        return fFilters;
    }
    void filters (ParseTree* filters)
    {
        fFilters = filters;
    }

    /**  filter token list
     * Set filter list field and build filters tree from the filter list
     * This is an alternative way to build filter tree. Hide the parser
     * from the user. filterTokenList will be destroyed after the parsing
     */
    //const FilterTokenList& filterTokenList() const { return fFilterTokenList;}
    void filterTokenList (FilterTokenList& filterTokenList);

    /**
     * sub select list
    */
    const SelectList& subSelects() const
    {
        return fSubSelects;
    }
    void subSelects (const SelectList& subSelects)
    {
        fSubSelects = subSelects;
    }

    /**
     * group by column list
     */
    const GroupByColumnList& groupByCols() const
    {
        return fGroupByCols;
    }
    GroupByColumnList& groupByCols()
    {
        return fGroupByCols;
    }
    void groupByCols( const GroupByColumnList& groupByCols)
    {
        fGroupByCols = groupByCols;
    }

    /**
     * order by column list
     */
    const OrderByColumnList& orderByCols() const
    {
        return fOrderByCols;
    }
    OrderByColumnList& orderByCols()
    {
        return fOrderByCols;
    }
    void orderByCols( const OrderByColumnList& orderByCols)
    {
        fOrderByCols = orderByCols;
    }

    /**
     * table alias
     */
    const std::string& tableAlias() const
    {
        return fTableAlias;
    }
    void tableAlias (const std::string& tableAlias)
    {
        fTableAlias = tableAlias;
    }

    /**
     * location of this select
     */
    const int location () const
    {
        return fLocation;
    }
    void location (const int location)
    {
        fLocation = location;
    }

    /**
     * dependence of this select
     */
    const bool dependent() const
    {
        return fDependent;
    }
    void dependent (const bool dependent)
    {
        fDependent = dependent;
    }

    /**
     * having filter parse tree
     */
    inline const ParseTree* having() const
    {
        return fHaving;
    }
    inline ParseTree* having()
    {
        return fHaving;
    }
    inline void having (ParseTree* having)
    {
        fHaving = having;
    }

    /** having filter token list
     * Set filter list field and build filters tree from the filter list
     * This is an alternative way to build filter tree. Hide the parser
     * from the user
     */
    const FilterTokenList& havingTokenList() const
    {
        return fHavingTokenList;
    }
    void havingTokenList (const FilterTokenList& havingTokenList);

    /** column map
     * all the columns appeared on query
     */
    const ColumnMap& columnMap() const
    {
        return fColumnMap;
    }

    /** assign the static fColMap to non-static fColumnMap. map-wise copy */
    void columnMap (const ColumnMap& columnMap);

    /** assign a regular map object to non-static fColumnMap. pure assignment */
    // @note this is to fix memory leak in CSC, becasue no static map is needed there.
    inline void columnMapNonStatic (const ColumnMap& columnMap)
    {
        fColumnMap = columnMap;
    }

    /** sql representation of this select query
     *
     */
    const std::string data() const
    {
        return fData;
    }
    void data ( const std::string data )
    {
        fData = data;
    }

    /** session id
     *
     */
    const uint32_t sessionID() const
    {
        return fSessionID;
    }
    void sessionID ( const uint32_t sessionID )
    {
        fSessionID = sessionID;
    }

    /** transaction id
     *
     */
    const int txnID() const
    {
        return fTxnID;
    }
    void txnID ( const int txnID )
    {
        fTxnID = txnID;
    }

    /** version id
     *
     */
    const BRM::QueryContext verID() const
    {
        return fVerID;
    }
    void verID ( const BRM::QueryContext verID )
    {
        fVerID = verID;
    }

    inline static ColumnMap& colMap()
    {
        return fColMap;
    }

    inline std::string& schemaName()
    {
        return fSchemaName;
    }
    inline void schemaName(const std::string& schemaName)
    {
        fSchemaName = schemaName;
    }

    inline std::string& tableName()
    {
        return fTableName;
    }
    inline void tableName(const std::string& tableName)
    {
        fTableName = tableName;
    }

    inline void traceOn(bool traceOn) __attribute__((deprecated))
    {
        if (traceOn) fTraceFlags |= TRACE_LOG;
        else fTraceFlags &= ~TRACE_LOG;
    }
    inline bool traceOn() const
    {
        return (traceFlags() & TRACE_LOG);
    }

    inline uint32_t traceFlags() const
    {
        return fTraceFlags;
    }
    inline void traceFlags(uint32_t traceFlags)
    {
        fTraceFlags = traceFlags;
    }

    const uint32_t statementID() const
    {
        return fStatementID;
    }
    void statementID (const uint32_t statementID)
    {
        fStatementID = statementID;
    }

    const RMParmVec& rmParms()
    {
        return frmParms;
    }
    void rmParms (const RMParmVec& parms);

    const TableList& tableList() const
    {
        return fTableList;
    }
    void tableList (const TableList& tableList)
    {
        fTableList = tableList;
    }

    const SelectList& derivedTableList() const
    {
        return fDerivedTableList;
    }
    void derivedTableList(SelectList& derivedTableList)
    {
        fDerivedTableList = derivedTableList;
    }

    const bool distinct() const
    {
        return fDistinct;
    }
    void distinct(const bool distinct)
    {
        fDistinct = distinct;
    }

    void overrideLargeSideEstimate (const bool over)
    {
        fOverrideLargeSideEstimate = over;
    }
    const bool overrideLargeSideEstimate() const
    {
        return fOverrideLargeSideEstimate;
    }

    void unionVec(const SelectList& unionVec)
    {
        fUnionVec = unionVec;
    }
    const SelectList& unionVec() const
    {
        return fUnionVec;
    }
    SelectList& unionVec()
    {
        return fUnionVec;
    }

    void distinctUnionNum(const uint8_t distinctUnionNum)
    {
        fDistinctUnionNum = distinctUnionNum;
    }
    const uint8_t distinctUnionNum() const
    {
        return fDistinctUnionNum;
    }

    void subType(const uint64_t subType)
    {
        fSubType = subType;
    }
    const uint64_t subType() const
    {
        return fSubType;
    }

    void derivedTbAlias(const std::string derivedTbAlias)
    {
        fDerivedTbAlias = derivedTbAlias;
    }
    const std::string derivedTbAlias() const
    {
        return fDerivedTbAlias;
    }

    void derivedTbView(const std::string derivedTbView) { fDerivedTbView = derivedTbView; }
    const std::string derivedTbView() const { return fDerivedTbView; }


    void limitStart(const uint64_t limitStart)
    {
        fLimitStart = limitStart;
    }
    const uint64_t limitStart() const
    {
        return fLimitStart;
    }

    void limitNum(const uint64_t limitNum)
    {
        fLimitNum = limitNum;
    }
    const uint64_t limitNum() const
    {
        return fLimitNum;
    }

    void hasOrderBy(const bool hasOrderBy)
    {
        fHasOrderBy = hasOrderBy;
    }
    const bool hasOrderBy() const
    {
        return fHasOrderBy;
    }

    void specHandlerProcessed(const bool hand)
    {
        fSpecHandlerProcessed = hand;
    }
    const bool specHandlerProcessed() const
    {
        return fSpecHandlerProcessed;
    } 

    void selectSubList(const SelectList& selectSubList)
    {
        fSelectSubList = selectSubList;
    }
    const SelectList& selectSubList() const
    {
        return fSelectSubList;
    }

    void subSelectList(const std::vector<execplan::SCSEP>& subSelectList)
    {
        fSubSelectList = subSelectList;
    }
    const std::vector<execplan::SCSEP>& subSelectList() const
    {
        return fSubSelectList;
    }

    void stringScanThreshold(uint64_t n)
    {
        fStringScanThreshold = n;
    }
    uint64_t stringScanThreshold() const
    {
        return fStringScanThreshold;
    }

    // query type. return string for easy stats insert
    void queryType(const uint32_t queryType)
    {
        fQueryType = queryType;
    }
    const std::string queryType() const
    {
        return queryTypeToString(fQueryType);
    }
    static std::string queryTypeToString(const uint32_t queryType);

    void priority(uint32_t p)
    {
        fPriority = p;
    }
    uint32_t priority() const
    {
        return fPriority;
    }

    void stringTableThreshold(uint32_t t)
    {
        fStringTableThreshold = t;
    }
    uint32_t stringTableThreshold() const
    {
        return fStringTableThreshold;
    }

    void uuid(const boost::uuids::uuid& uuid)
    {
        fUuid = uuid;
    }
    const boost::uuids::uuid& uuid() const
    {
        return fUuid;
    }

    void djsSmallSideLimit(uint64_t l)
    {
        fDJSSmallSideLimit = l;
    }
    uint64_t djsSmallSideLimit()
    {
        return fDJSSmallSideLimit;
    }

    void djsLargeSideLimit(uint64_t l)
    {
        fDJSLargeSideLimit = l;
    }
    uint64_t djsLargeSideLimit()
    {
        return fDJSLargeSideLimit;
    }

    void djsPartitionSize(uint64_t l)
    {
        fDJSPartitionSize = l;
    }
    uint64_t djsPartitionSize()
    {
        return fDJSPartitionSize;
    }

    void umMemLimit(uint64_t l)
    {
        fUMMemLimit = l;
    }
    int64_t umMemLimit()
    {
        return fUMMemLimit;
    }

    void isDML(bool b)
    {
        fIsDML = b;
    }
    bool isDML()
    {
        return fIsDML;
    }

    void timeZone(const std::string& timezone)
    {
        fTimeZone = timezone;
    }
    const std::string timeZone() const
    {
        return fTimeZone;
    }

    /**
     * The serialization interface
     */
    /**
     * @note Serialize() assumes that none of the vectors contain NULL pointers.
     */
    virtual void serialize(messageqcpp::ByteStream&) const;
    virtual void unserialize(messageqcpp::ByteStream&);

    /** @brief Do a deep, strict (as opposed to semantic) equivalence test
     *
     * Do a deep, strict (as opposed to semantic) equivalence test.
     * @return true iff every member of t is a duplicate copy of every member of this; false otherwise
     */
    virtual bool operator==(const CalpontExecutionPlan* t) const;

    /** @brief Do a deep, strict (as opposed to semantic) equivalence test
     *
     * Do a deep, strict (as opposed to semantic) equivalence test.
     * @return true iff every member of t is a duplicate copy of every member of this; false otherwise
     */
    virtual bool operator==(const CalpontSelectExecutionPlan& t) const;

    /** @brief Do a deep, strict (as opposed to semantic) equivalence test
     *
     * Do a deep, strict (as opposed to semantic) equivalence test.
     * @return false iff every member of t is a duplicate copy of every member of this; true otherwise
     */
    virtual bool operator!=(const CalpontExecutionPlan* t) const;

    /** @brief Do a deep, strict (as opposed to semantic) equivalence test
     *
     * Do a deep, strict (as opposed to semantic) equivalence test.
     * @return false iff every member of t is a duplicate copy of every member of this; true otherwise
     */
    virtual bool operator!=(const CalpontSelectExecutionPlan& t) const;

    /** @brief Return a string rep of the CSEP
     *
     * Return a string rep of the CSEP
     * @return a string
     */
    virtual std::string toString() const;

    /** @brief Is this an internal query?
     *
     * Is this an internal query (a syscat query performed on behalf of another query)
     * FIXME: add a setter and make this work for really big session ids
     * @return true/false
     */
    virtual bool isInternal() const
    {
        return ((fSessionID & 0x80000000) != 0);
    }

    /**
     * Protected stuff
     */
protected:
    /**
     * Fields
     */
    /**
     *
     */
    /**
     * Constructors
     */
    /**
     * Accessor Methods
     */
    /**
     * Operations
     */
    /**
     * Private stuff
     */
private:

    /**
     * If set, then the local PM only option is turned on
     */
    uint32_t fLocalQuery;

    /**
     * A list of ReturnedColumn objects
     */
    ReturnedColumnList fReturnedCols;
    /**
     * A list of filter tokens including filters and operators
     * This is a helper data structure, it holds the tokens of
     * the filter parse tree and will be built into a parse tree
     * in the mutator method.
     * @note the elements in this list will be deleted when fFilters
     * parse tree is deleted. So this list should not be deleted
     * again in destructor.
     */
    FilterTokenList fFilterTokenList;
    FilterTokenList fHavingTokenList;

    /**
     * A tree of Filter objects
     */
    ParseTree* fFilters;
    /**
     * A list of CalpontExecutionPlan objects
     */
    SelectList fSubSelects;
    /**
     * A list of group by columns
     */
    GroupByColumnList fGroupByCols;
    /**
     * A tree of having clause condition associated with group by clause
     */
    ParseTree* fHaving;
    /**
     * A list of order by columns
     */
    OrderByColumnList fOrderByCols;
    /**
     * Table or alias name for subselect in FROM clause
     */
    std::string fTableAlias;
    /**
     * An enum indicating the location of this select statement in the enclosing select statement
     */
    int fLocation;
    /**
     * A flag indicating if this sub-select is dependent on the enclosing query or is constant
     */
    bool fDependent;

    /**
     * SQL representation of this execution plan
     */
    std::string fData;
    static ColumnMap fColMap;  // for getplan to use. class-wise map
    ColumnMap fColumnMap;  // for ExeMgr to use. not shared between objects

    uint32_t fSessionID;
    int fTxnID;    // SQLEngine only needs the ID value
    BRM::QueryContext fVerID;
    // @bug5316. remove static
    std::string fSchemaName;
    std::string fTableName;
    uint32_t fTraceFlags;

    /**
     * One-up statementID number for this session (fSessionID)
     */
    uint32_t fStatementID;

    RMParmVec frmParms;
    TableList fTableList;
    SelectList fDerivedTableList;

    bool fDistinct;
    bool fOverrideLargeSideEstimate;

    // for union
    SelectList fUnionVec;
    uint8_t fDistinctUnionNum;

    // for subselect
    uint64_t fSubType;
    std::string fDerivedTbAlias;
    std::string fDerivedTbView;

    // for limit
    uint64_t fLimitStart;
    uint64_t fLimitNum;

    // for parent select order by
    bool fHasOrderBy;

    // for Select clause subquery
    SelectList fSelectSubList;

    // @bug3321, for string scan blocks
    uint64_t fStringScanThreshold;

    // query type
    uint32_t fQueryType;

    uint32_t fPriority;
    uint32_t fStringTableThreshold;
    
    // for specific handlers processing, e.g. GROUP BY
    bool fSpecHandlerProcessed;

    // Derived table involved in the query. For derived table optimization
    std::vector<SCSEP> fSubSelectList;

    boost::uuids::uuid fUuid;

    /* Disk-based join vars */
    uint64_t fDJSSmallSideLimit;
    uint64_t fDJSLargeSideLimit;
    uint64_t fDJSPartitionSize;
    int64_t fUMMemLimit;
    bool fIsDML;

    std::string fTimeZone;
};

/**
 *	Output stream operator
 */

inline std::ostream& operator<<(std::ostream& os, const CalpontSelectExecutionPlan& rhs)
{
    os << rhs.toString();
    return os;
}

}
#endif //CALPONTSELECTEXECUTIONPLAN_H
// vim:ts=4 sw=4: