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sphinxquery.cpp
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sphinxquery.cpp
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//
// Copyright (c) 2017-2023, Manticore Software LTD (https://manticoresearch.com)
// Copyright (c) 2001-2016, Andrew Aksyonoff
// Copyright (c) 2008-2016, Sphinx Technologies Inc
// All rights reserved
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License. You should have
// received a copy of the GPL license along with this program; if you
// did not, you can find it at http://www.gnu.org/
//
#include "sphinxquery.h"
#include "sphinxutils.h"
#include "sphinxplugin.h"
#include <stdarg.h>
#include "tokenizer/tokenizer.h"
#include "dict/dict_base.h"
//////////////////////////////////////////////////////////////////////////
// EXTENDED PARSER RELOADED
//////////////////////////////////////////////////////////////////////////
class XQParser_t;
#include "bissphinxquery.h"
// #define XQDEBUG 1
// #define XQ_DUMP_TRANSFORMED_TREE 1
// #define XQ_DUMP_NODE_ADDR 1
static bool g_bOnlyNotAllowed = false;
void AllowOnlyNot ( bool bAllowed )
{
g_bOnlyNotAllowed = bAllowed;
}
bool IsAllowOnlyNot()
{
return g_bOnlyNotAllowed;
}
NodeEstimate_t & NodeEstimate_t::operator+= ( const NodeEstimate_t & tRhs )
{
m_fCost += tRhs.m_fCost;
m_iDocs += tRhs.m_iDocs;
m_iTerms += tRhs.m_iTerms;
return *this;
}
//////////////////////////////////////////////////////////////////////////
void XQParseHelper_c::SetString ( const char * szString )
{
assert ( m_pTokenizer );
m_pTokenizer->SetBuffer ( (const BYTE*)szString, (int) strlen(szString) );
m_iAtomPos = 0;
}
/// lookup field and add it into mask
bool XQParseHelper_c::AddField ( FieldMask_t & dFields, const char * szField, int iLen )
{
if ( !szField || !iLen )
return Error ( "empty field passed to AddField()" );
CSphString sField;
sField.SetBinary ( szField, iLen );
int iField = m_pSchema->GetFieldIndex ( sField.cstr () );
if ( iField<0 )
{
if ( m_bStopOnInvalid )
return Error ( "no field '%s' found in schema", sField.cstr () );
else
Warning ( "no field '%s' found in schema", sField.cstr () );
} else
{
if ( iField>=SPH_MAX_FIELDS )
return Error ( " max %d fields allowed", SPH_MAX_FIELDS );
dFields.Set ( iField );
}
return true;
}
/// parse fields block
bool XQParseHelper_c::ParseFields ( FieldMask_t & dFields, int & iMaxFieldPos, bool & bIgnore )
{
dFields.UnsetAll();
iMaxFieldPos = 0;
bIgnore = false;
const char * pPtr = m_pTokenizer->GetBufferPtr ();
const char * pLastPtr = m_pTokenizer->GetBufferEnd ();
if ( pPtr==pLastPtr )
return true; // silently ignore trailing field operator
bool bNegate = false;
bool bBlock = false;
// handle special modifiers
if ( *pPtr=='!' )
{
// handle @! and @!(
bNegate = true; ++pPtr;
if ( *pPtr=='(' ) { bBlock = true; ++pPtr; }
} else if ( *pPtr=='*' )
{
// handle @*
dFields.SetAll();
m_pTokenizer->SetBufferPtr ( pPtr+1 );
return true;
} else if ( HandleSpecialFields ( pPtr, dFields ) )
return true;
else
bBlock = HandleFieldBlockStart ( pPtr );
// handle invalid chars
if ( !sphIsAlpha(*pPtr) )
{
bIgnore = true;
m_pTokenizer->SetBufferPtr ( pPtr ); // ignore and re-parse (FIXME! maybe warn?)
return true;
}
assert ( sphIsAlpha(*pPtr) ); // i think i'm paranoid
// handle field specification
if ( !bBlock )
{
// handle standalone field specification
const char * pFieldStart = pPtr;
while ( sphIsAlpha(*pPtr) && pPtr<pLastPtr )
++pPtr;
assert ( pPtr-pFieldStart>0 );
if ( !AddField ( dFields, pFieldStart, int ( pPtr-pFieldStart ) ) )
return false;
m_pTokenizer->SetBufferPtr ( pPtr );
if ( bNegate )
dFields.Negate();
} else
{
// handle fields block specification
assert ( sphIsAlpha(*pPtr) && bBlock ); // and complicated
bool bOK = false;
const char * pFieldStart = nullptr;
while ( pPtr<pLastPtr )
{
// accumulate field name, while we can
if ( sphIsAlpha(*pPtr) || *pPtr=='.' )
{
if ( !pFieldStart )
pFieldStart = pPtr;
++pPtr;
continue;
}
// separator found
if ( !pFieldStart )
{
CSphString sContext;
sContext.SetBinary ( pPtr, (int)( pLastPtr-pPtr ) );
return Error ( "error parsing field list: invalid field block operator syntax near '%s'", sContext.cstr() );
} else if ( *pPtr==',' )
{
if ( !AddField ( dFields, pFieldStart, int ( pPtr-pFieldStart ) ) )
return false;
pFieldStart = nullptr;
pPtr++;
} else if ( *pPtr==')' )
{
if ( !AddField ( dFields, pFieldStart, int ( pPtr-pFieldStart ) ) )
return false;
m_pTokenizer->SetBufferPtr ( ++pPtr );
if ( bNegate )
dFields.Negate();
bOK = true;
break;
} else
{
return Error ( "error parsing field list: invalid character '%c' in field block operator", *pPtr );
}
}
if ( !bOK )
{
if ( NeedTrailingSeparator() )
return Error ( "error parsing field list: missing closing ')' in field block operator" );
else
{
if ( !AddField ( dFields, pFieldStart, int ( pPtr-pFieldStart ) ) )
return false;
if ( bNegate )
dFields.Negate();
return true;
}
}
}
// handle optional position range modifier
if ( pPtr[0]=='[' && isdigit ( pPtr[1] ) )
{
// skip '[' and digits
const char * p = pPtr+1;
while ( *p && isdigit(*p) ) p++;
// check that the range ends with ']' (FIXME! maybe report an error if it does not?)
if ( *p!=']' )
return true;
// fetch my value
iMaxFieldPos = strtoul ( pPtr+1, NULL, 10 );
m_pTokenizer->SetBufferPtr ( p+1 );
}
// well done
return true;
}
void XQParseHelper_c::Setup ( const CSphSchema * pSchema, TokenizerRefPtr_c pTokenizer, DictRefPtr_c pDict, XQQuery_t * pXQQuery, const CSphIndexSettings & tSettings )
{
m_pSchema = pSchema;
m_pTokenizer = std::move ( pTokenizer );
m_pDict = std::move (pDict);
m_pParsed = pXQQuery;
m_iAtomPos = 0;
m_bEmptyStopword = ( tSettings.m_iStopwordStep==0 );
}
bool XQParseHelper_c::Error ( const char * sTemplate, ... )
{
assert ( m_pParsed );
char sBuf[256];
const char * sPrefix = "query error: ";
auto iPrefix = strlen(sPrefix);
memcpy ( sBuf, sPrefix, iPrefix );
va_list ap;
va_start ( ap, sTemplate );
vsnprintf ( sBuf+iPrefix, sizeof(sBuf)-iPrefix, sTemplate, ap );
va_end ( ap );
m_bError = true;
m_pParsed->m_sParseError = sBuf;
return false;
}
void XQParseHelper_c::Warning ( const char * sTemplate, ... )
{
assert ( m_pParsed );
char sBuf[256];
const char * sPrefix = "query warning: ";
auto iPrefix = strlen(sPrefix);
memcpy ( sBuf, sPrefix, iPrefix );
va_list ap;
va_start ( ap, sTemplate );
vsnprintf ( sBuf+iPrefix, sizeof(sBuf)-iPrefix, sTemplate, ap );
va_end ( ap );
m_pParsed->m_sParseWarning = sBuf;
}
void XQParseHelper_c::Cleanup()
{
m_dSpawned.Uniq(); // FIXME! should eliminate this by testing
ARRAY_FOREACH ( i, m_dSpawned )
{
m_dSpawned[i]->m_dChildren.Reset ();
SafeDelete ( m_dSpawned[i] );
}
m_dSpawned.Reset ();
}
bool XQParseHelper_c::CheckQuorumProximity ( XQNode_t * pNode )
{
if ( !pNode )
return true;
bool bQuorumPassed = ( pNode->GetOp()!=SPH_QUERY_QUORUM ||
( pNode->m_iOpArg>0 && ( !pNode->m_bPercentOp || pNode->m_iOpArg<=100 ) ) );
if ( !bQuorumPassed )
{
if ( pNode->m_bPercentOp )
return Error ( "quorum threshold out of bounds 0.0 and 1.0f (%f)", 1.0f / 100.0f * pNode->m_iOpArg );
else
return Error ( "quorum threshold too low (%d)", pNode->m_iOpArg );
}
if ( pNode->GetOp()==SPH_QUERY_PROXIMITY && pNode->m_iOpArg<1 )
return Error ( "proximity threshold too low (%d)", pNode->m_iOpArg );
return pNode->m_dChildren.all_of ( [&] ( XQNode_t * pChild ) { return CheckQuorumProximity(pChild); } );
}
static void FixupDegenerates ( XQNode_t * pNode, CSphString & sWarning )
{
if ( !pNode )
return;
if ( pNode->m_dWords.GetLength()==1 &&
( pNode->GetOp()==SPH_QUERY_PHRASE || pNode->GetOp()==SPH_QUERY_PROXIMITY || pNode->GetOp()==SPH_QUERY_QUORUM ) )
{
if ( pNode->GetOp()==SPH_QUERY_QUORUM && !pNode->m_bPercentOp && pNode->m_iOpArg>1 )
sWarning.SetSprintf ( "quorum threshold too high (words=%d, thresh=%d); replacing quorum operator with AND operator", pNode->m_dWords.GetLength(), pNode->m_iOpArg );
pNode->SetOp ( SPH_QUERY_AND );
return;
}
ARRAY_FOREACH ( i, pNode->m_dChildren )
FixupDegenerates ( pNode->m_dChildren[i], sWarning );
}
static XQNode_t * TransformOnlyNot ( XQNode_t * pNode, CSphVector<XQNode_t *> & dSpawned )
{
XQNode_t * pScan = new XQNode_t ( pNode->m_dSpec );
pScan->SetOp ( SPH_QUERY_SCAN );
dSpawned.Add ( pScan );
XQNode_t * pAnd = new XQNode_t ( pNode->m_dSpec );
pAnd->SetOp ( SPH_QUERY_ANDNOT, pScan, pNode );
dSpawned.Add ( pScan );
return pAnd;
}
static XQNode_t * FixupNot ( XQNode_t * pNode, CSphVector<XQNode_t *> & dSpawned )
{
pNode->SetOp ( SPH_QUERY_AND );
return TransformOnlyNot ( pNode, dSpawned );
}
XQNode_t * XQParseHelper_c::FixupTree ( XQNode_t * pRoot, const XQLimitSpec_t & tLimitSpec, bool bOnlyNotAllowed )
{
FixupDestForms ();
DeleteNodesWOFields ( pRoot );
pRoot = SweepNulls ( pRoot, bOnlyNotAllowed );
FixupDegenerates ( pRoot, m_pParsed->m_sParseWarning );
FixupNulls ( pRoot );
if ( !FixupNots ( pRoot, bOnlyNotAllowed, &pRoot ) )
{
Cleanup ();
return NULL;
}
if ( !CheckQuorumProximity ( pRoot ) )
{
Cleanup();
return NULL;
}
if ( pRoot && pRoot->GetOp()==SPH_QUERY_NOT )
{
if ( bOnlyNotAllowed )
{
pRoot = FixupNot ( pRoot, m_dSpawned );
} else if ( !pRoot->m_iOpArg )
{
Cleanup();
Error ( "query is non-computable (single NOT operator)" );
return NULL;
}
}
// all ok; might want to create a dummy node to indicate that
m_dSpawned.Reset();
if ( pRoot && pRoot->GetOp()==SPH_QUERY_NULL )
SafeDelete ( pRoot );
return pRoot ? pRoot : new XQNode_t ( tLimitSpec );
}
XQNode_t * XQParseHelper_c::SweepNulls ( XQNode_t * pNode, bool bOnlyNotAllowed )
{
if ( !pNode )
return NULL;
// sweep plain node
if ( pNode->m_dWords.GetLength() )
{
ARRAY_FOREACH ( i, pNode->m_dWords )
if ( pNode->m_dWords[i].m_sWord.cstr()==NULL )
pNode->m_dWords.Remove ( i-- );
if ( pNode->m_dWords.GetLength()==0 )
{
m_dSpawned.RemoveValue ( pNode ); // OPTIMIZE!
SafeDelete ( pNode );
return NULL;
}
return pNode;
}
// sweep op node
ARRAY_FOREACH ( i, pNode->m_dChildren )
{
pNode->m_dChildren[i] = SweepNulls ( pNode->m_dChildren[i], bOnlyNotAllowed );
if ( pNode->m_dChildren[i]==NULL )
{
pNode->m_dChildren.Remove ( i-- );
// use non-null iOpArg as a flag indicating that the sweeping happened.
++pNode->m_iOpArg;
}
}
if ( pNode->m_dChildren.GetLength()==0 )
{
m_dSpawned.RemoveValue ( pNode ); // OPTIMIZE!
SafeDelete ( pNode );
return NULL;
}
// remove redundancies if needed
if ( pNode->GetOp()!=SPH_QUERY_NOT && pNode->m_dChildren.GetLength()==1 )
{
XQNode_t * pRet = pNode->m_dChildren[0];
pNode->m_dChildren.Reset ();
pRet->m_pParent = pNode->m_pParent;
// expressions like 'la !word' (having min_word_len>len(la)) became a 'null' node.
if ( pNode->m_iOpArg && pRet->GetOp()==SPH_QUERY_NOT && !bOnlyNotAllowed )
{
pRet->SetOp ( SPH_QUERY_NULL );
ARRAY_FOREACH ( i, pRet->m_dChildren )
{
m_dSpawned.RemoveValue ( pRet->m_dChildren[i] );
SafeDelete ( pRet->m_dChildren[i] );
}
pRet->m_dChildren.Reset();
}
pRet->m_iOpArg = pNode->m_iOpArg;
m_dSpawned.RemoveValue ( pNode ); // OPTIMIZE!
SafeDelete ( pNode );
return SweepNulls ( pRet, bOnlyNotAllowed );
}
// done
return pNode;
}
void XQParseHelper_c::FixupNulls ( XQNode_t * pNode )
{
if ( !pNode )
return;
ARRAY_FOREACH ( i, pNode->m_dChildren )
FixupNulls ( pNode->m_dChildren[i] );
// smth OR null == smth.
if ( pNode->GetOp()==SPH_QUERY_OR )
{
CSphVector<XQNode_t*> dNotNulls;
ARRAY_FOREACH ( i, pNode->m_dChildren )
{
XQNode_t* pChild = pNode->m_dChildren[i];
if ( pChild->GetOp()!=SPH_QUERY_NULL )
dNotNulls.Add ( pChild );
else
{
m_dSpawned.RemoveValue ( pChild );
SafeDelete ( pChild );
}
}
pNode->m_dChildren.SwapData ( dNotNulls );
dNotNulls.Reset();
// smth AND null = null.
} else if ( pNode->GetOp()==SPH_QUERY_AND )
{
if ( pNode->m_dChildren.any_of (
[] ( XQNode_t * pChild ) { return pChild->GetOp ()==SPH_QUERY_NULL; } ) )
{
pNode->SetOp ( SPH_QUERY_NULL );
for ( auto &pChild : pNode->m_dChildren )
{
m_dSpawned.RemoveValue ( pChild );
SafeDelete ( pChild );
}
pNode->m_dChildren.Reset ();
}
}
}
bool XQParseHelper_c::FixupNots ( XQNode_t * pNode, bool bOnlyNotAllowed, XQNode_t ** ppRoot )
{
// no processing for plain nodes
if ( !pNode || !pNode->m_dWords.IsEmpty() )
return true;
// query was already transformed
if ( pNode->GetOp()==SPH_QUERY_ANDNOT )
return true;
// process 'em children
for ( auto& dNode : pNode->m_dChildren )
if ( !FixupNots ( dNode, bOnlyNotAllowed, ppRoot ) )
return false;
// extract NOT subnodes
CSphVector<XQNode_t*> dNots;
ARRAY_FOREACH ( i, pNode->m_dChildren )
if ( pNode->m_dChildren[i]->GetOp()==SPH_QUERY_NOT )
{
dNots.Add ( pNode->m_dChildren[i] );
pNode->m_dChildren.RemoveFast ( i-- );
}
// no NOTs? we're square
if ( !dNots.GetLength() )
return true;
// nothing but NOTs? we can't compute that
if ( !pNode->m_dChildren.GetLength() && !bOnlyNotAllowed )
return Error ( "query is non-computable (node consists of NOT operators only)" );
// NOT within OR or MAYBE? we can't compute that
if ( pNode->GetOp()==SPH_QUERY_OR || pNode->GetOp()==SPH_QUERY_MAYBE || pNode->GetOp()==SPH_QUERY_NEAR )
{
XQOperator_e eOp = pNode->GetOp();
const char * sOp = ( eOp==SPH_QUERY_OR ? "OR" : ( eOp==SPH_QUERY_MAYBE ? "MAYBE" : "NEAR" ) );
return Error ( "query is non-computable (NOT is not allowed within %s)", sOp );
}
// NOT used in before operator
if ( pNode->GetOp()==SPH_QUERY_BEFORE )
return Error ( "query is non-computable (NOT cannot be used as before operand)" );
// must be some NOTs within AND at this point, convert this node to ANDNOT
assert ( ( ( pNode->GetOp()==SPH_QUERY_AND && pNode->m_dChildren.GetLength() )
|| ( pNode->GetOp()==SPH_QUERY_AND && !pNode->m_dChildren.GetLength() && bOnlyNotAllowed ) )
&& dNots.GetLength() );
if ( pNode->GetOp()==SPH_QUERY_AND && !pNode->m_dChildren.GetLength() )
{
if ( !bOnlyNotAllowed )
return Error ( "query is non-computable (node consists of NOT operators only)" );
if ( !pNode->m_pParent )
{
pNode->SetOp ( SPH_QUERY_OR, dNots );
*ppRoot = TransformOnlyNot ( pNode, m_dSpawned );
return true;
} else if ( pNode->m_pParent && pNode->m_pParent->GetOp()==SPH_QUERY_AND && pNode->m_pParent->m_dChildren.GetLength()==2 )
{
pNode->m_pParent->SetOp ( SPH_QUERY_ANDNOT );
pNode->SetOp ( SPH_QUERY_OR, dNots );
return true;
} else
{
return Error ( "query is non-computable (node consists of NOT operators only)" );
}
}
XQNode_t * pAnd = new XQNode_t ( pNode->m_dSpec );
pAnd->SetOp ( SPH_QUERY_AND, pNode->m_dChildren );
m_dSpawned.Add ( pAnd );
XQNode_t * pNot = NULL;
if ( dNots.GetLength()==1 )
{
pNot = dNots[0];
} else
{
pNot = new XQNode_t ( pNode->m_dSpec );
pNot->SetOp ( SPH_QUERY_OR, dNots );
m_dSpawned.Add ( pNot );
}
pNode->SetOp ( SPH_QUERY_ANDNOT, pAnd, pNot );
return true;
}
static void CollectChildren ( XQNode_t * pNode, CSphVector<XQNode_t *> & dChildren )
{
if ( pNode->m_dChildren.IsEmpty() )
return;
dChildren.Add ( pNode );
for ( const XQNode_t *pChild : dChildren )
for ( const auto& dChild : pChild->m_dChildren )
dChildren.Add ( dChild );
}
void XQParseHelper_c::DeleteNodesWOFields ( XQNode_t * pNode )
{
if ( !pNode )
return;
for ( int i = 0; i < pNode->m_dChildren.GetLength (); )
{
if ( pNode->m_dChildren[i]->m_dSpec.m_dFieldMask.TestAll ( false ) )
{
XQNode_t * pChild = pNode->m_dChildren[i];
CSphVector<XQNode_t *> dChildren;
CollectChildren ( pChild, dChildren );
#ifndef NDEBUG
bool bAllEmpty = dChildren.all_of ( [] ( XQNode_t * pChildNode ) { return pChildNode->m_dSpec.m_dFieldMask.TestAll ( false ); } );
assert ( pChild->m_dChildren.GetLength()==0 || ( dChildren.GetLength() && bAllEmpty ) );
#endif
if ( dChildren.GetLength() )
{
ARRAY_FOREACH ( iChild, dChildren )
m_dSpawned.RemoveValue ( dChildren[iChild] );
} else
m_dSpawned.RemoveValue ( pChild );
// this should be a leaf node
SafeDelete ( pNode->m_dChildren[i] );
pNode->m_dChildren.RemoveFast ( i );
} else
{
DeleteNodesWOFields ( pNode->m_dChildren[i] );
i++;
}
}
}
void XQParseHelper_c::FixupDestForms ()
{
if ( !m_dMultiforms.GetLength() )
return;
CSphVector<XQNode_t *> dForms;
ARRAY_FOREACH ( iNode, m_dMultiforms )
{
const MultiformNode_t & tDesc = m_dMultiforms[iNode];
XQNode_t * pMultiParent = tDesc.m_pNode;
assert ( pMultiParent->m_dWords.GetLength()==1 && pMultiParent->m_dChildren.GetLength()==0 );
XQKeyword_t tKeyword;
Swap ( pMultiParent->m_dWords[0], tKeyword );
pMultiParent->m_dWords.Reset();
// FIXME: what about whildcard?
bool bExact = ( tKeyword.m_sWord.Length()>1 && tKeyword.m_sWord.cstr()[0]=='=' );
bool bFieldStart = tKeyword.m_bFieldStart;
bool bFieldEnd = tKeyword.m_bFieldEnd;
tKeyword.m_bFieldStart = false;
tKeyword.m_bFieldEnd = false;
XQNode_t * pMultiHead = new XQNode_t ( pMultiParent->m_dSpec );
pMultiHead->m_dWords.Add ( tKeyword );
m_dSpawned.Add ( pMultiHead );
dForms.Add ( pMultiHead );
for ( int iForm=0; iForm<tDesc.m_iDestCount; iForm++ )
{
tKeyword.m_iAtomPos++;
tKeyword.m_sWord = m_dDestForms [ tDesc.m_iDestStart + iForm ];
// propagate exact word flag to all destination forms
if ( bExact )
tKeyword.m_sWord.SetSprintf ( "=%s", tKeyword.m_sWord.cstr() );
XQNode_t * pMulti = new XQNode_t ( pMultiParent->m_dSpec );
pMulti->m_dWords.Add ( tKeyword );
m_dSpawned.Add ( pMulti );
dForms.Add ( pMulti );
}
// fix-up field start\end modifier
dForms[0]->m_dWords[0].m_bFieldStart = bFieldStart;
dForms.Last()->m_dWords[0].m_bFieldEnd = bFieldEnd;
pMultiParent->SetOp ( SPH_QUERY_AND, dForms );
dForms.Resize ( 0 );
}
}
void XQParseHelper_c::SetZone ( const StrVec_t & dZones )
{
assert ( m_pParsed );
m_pParsed->m_dZones = dZones;
}
const StrVec_t & XQParseHelper_c::GetZone() const
{
assert ( m_pParsed );
return m_pParsed->m_dZones;
}
//////////////////////////////////////////////////////////////////////////
class XQParser_t : public XQParseHelper_c
{
friend void yyerror ( XQParser_t * pParser, const char * sMessage );
friend int yyparse (XQParser_t * pParser);
public:
XQParser_t();
~XQParser_t() override;
public:
bool Parse ( XQQuery_t & tQuery, const char * sQuery, const CSphQuery * pQuery, const TokenizerRefPtr_c& pTokenizer, const CSphSchema * pSchema, const DictRefPtr_c& pDict, const CSphIndexSettings & tSettings );
int ParseZone ( const char * pZone );
bool IsSpecial ( char c );
bool GetNumber ( const char * p, const char * sRestart );
int GetToken ( YYSTYPE * lvalp );
void HandleModifiers ( XQKeyword_t & tKeyword );
void AddQuery ( XQNode_t * pNode );
XQNode_t * AddKeyword ( const char * sKeyword, int iSkippedPosBeforeToken=0 );
XQNode_t * AddKeyword ( XQNode_t * pLeft, XQNode_t * pRight );
XQNode_t * AddOp ( XQOperator_e eOp, XQNode_t * pLeft, XQNode_t * pRight, int iOpArg=0 );
void SetPhrase ( XQNode_t * pNode, bool bSetExact );
void PhraseShiftQpos ( XQNode_t * pNode );
virtual void Cleanup () override;
inline void SetFieldSpec ( const FieldMask_t& uMask, int iMaxPos )
{
FixRefSpec();
m_dStateSpec.Last()->SetFieldSpec ( uMask, iMaxPos );
}
inline void SetZoneVec ( int iZoneVec, bool bZoneSpan = false )
{
FixRefSpec();
m_dStateSpec.Last()->SetZoneSpec ( m_dZoneVecs[iZoneVec], bZoneSpan );
}
inline void FixRefSpec ()
{
bool bRef = ( m_dStateSpec.GetLength()>1 && ( m_dStateSpec[m_dStateSpec.GetLength()-1]==m_dStateSpec[m_dStateSpec.GetLength()-2] ) );
if ( !bRef )
return;
XQLimitSpec_t * pSpec = m_dStateSpec.Pop();
m_dSpecPool.Add ( new XQLimitSpec_t ( *pSpec ) );
m_dStateSpec.Add ( m_dSpecPool.Last() );
}
public:
const CSphVector<int> & GetZoneVec ( int iZoneVec ) const
{
return m_dZoneVecs[iZoneVec];
}
public:
BYTE * m_sQuery = nullptr;
int m_iQueryLen = 0;
const char * m_pErrorAt = nullptr;
XQNode_t * m_pRoot = nullptr;
int m_iPendingNulls = 0;
int m_iPendingType = 0;
YYSTYPE m_tPendingToken;
bool m_bWasKeyword = false;
bool m_bEmpty = false;
bool m_bQuoted = false;
int m_iOvershortStep = 0;
int m_iQuorumQuote = -1;
int m_iQuorumFSlash = -1;
bool m_bCheckNumber = false;
StrVec_t m_dIntTokens;
CSphVector < CSphVector<int> > m_dZoneVecs;
CSphVector<XQLimitSpec_t *> m_dStateSpec;
CSphVector<XQLimitSpec_t *> m_dSpecPool;
CSphVector<int> m_dPhraseStar;
protected:
bool HandleFieldBlockStart ( const char * & pPtr ) override;
};
//////////////////////////////////////////////////////////////////////////
static int yylex ( YYSTYPE * lvalp, XQParser_t * pParser )
{
return pParser->GetToken ( lvalp );
}
void yyerror ( XQParser_t * pParser, const char * sMessage )
{
if ( pParser->m_pParsed->m_sParseError.IsEmpty() )
pParser->m_pParsed->m_sParseError.SetSprintf ( "P08: %s near '%s'", sMessage, pParser->m_pErrorAt );
}
#include "bissphinxquery.c"
//////////////////////////////////////////////////////////////////////////
void XQLimitSpec_t::SetFieldSpec ( const FieldMask_t& uMask, int iMaxPos )
{
m_bFieldSpec = true;
m_dFieldMask = uMask;
m_iFieldMaxPos = iMaxPos;
}
/// ctor
XQNode_t::XQNode_t ( const XQLimitSpec_t & dSpec )
: m_dSpec ( dSpec )
{
#ifdef XQ_DUMP_NODE_ADDR
printf ( "node new 0x%08x\n", this );
#endif
}
/// dtor
XQNode_t::~XQNode_t ()
{
#ifdef XQ_DUMP_NODE_ADDR
printf ( "node deleted %d 0x%08x\n", m_eOp, this );
#endif
ARRAY_FOREACH ( i, m_dChildren )
SafeDelete ( m_dChildren[i] );
}
void XQNode_t::SetFieldSpec ( const FieldMask_t& uMask, int iMaxPos )
{
// set it, if we do not yet have one
if ( !m_dSpec.m_bFieldSpec )
m_dSpec.SetFieldSpec ( uMask, iMaxPos );
// some of the children might not yet have a spec, even if the node itself has
// eg. 'hello @title world' (whole node has '@title' spec but 'hello' node does not have any!)
ARRAY_FOREACH ( i, m_dChildren )
m_dChildren[i]->SetFieldSpec ( uMask, iMaxPos );
}
void XQLimitSpec_t::SetZoneSpec ( const CSphVector<int> & dZones, bool bZoneSpan )
{
m_dZones = dZones;
m_bZoneSpan = bZoneSpan;
}
void XQNode_t::SetZoneSpec ( const CSphVector<int> & dZones, bool bZoneSpan )
{
// set it, if we do not yet have one
if ( !m_dSpec.m_dZones.GetLength() )
m_dSpec.SetZoneSpec ( dZones, bZoneSpan );
// some of the children might not yet have a spec, even if the node itself has
ARRAY_FOREACH ( i, m_dChildren )
m_dChildren[i]->SetZoneSpec ( dZones, bZoneSpan );
}
void XQNode_t::CopySpecs ( const XQNode_t * pSpecs )
{
if ( !pSpecs )
return;
if ( !m_dSpec.m_bFieldSpec )
m_dSpec.SetFieldSpec ( pSpecs->m_dSpec.m_dFieldMask, pSpecs->m_dSpec.m_iFieldMaxPos );
if ( !m_dSpec.m_dZones.GetLength() )
m_dSpec.SetZoneSpec ( pSpecs->m_dSpec.m_dZones, pSpecs->m_dSpec.m_bZoneSpan );
}
void XQNode_t::ClearFieldMask ()
{
m_dSpec.m_dFieldMask.SetAll();
ARRAY_FOREACH ( i, m_dChildren )
m_dChildren[i]->ClearFieldMask();
}
uint64_t XQNode_t::GetHash () const
{
if ( m_iMagicHash )
return m_iMagicHash;
XQOperator_e dZeroOp[2];
dZeroOp[0] = m_eOp;
dZeroOp[1] = (XQOperator_e) 0;
ARRAY_FOREACH ( i, m_dWords )
m_iMagicHash = 100 + ( m_iMagicHash ^ sphFNV64 ( m_dWords[i].m_sWord.cstr() ) ); // +100 to make it non-transitive
ARRAY_FOREACH ( j, m_dChildren )
m_iMagicHash = 100 + ( m_iMagicHash ^ m_dChildren[j]->GetHash() ); // +100 to make it non-transitive
m_iMagicHash += 1000000; // to immerse difference between parents and children
m_iMagicHash ^= sphFNV64 ( dZeroOp );
return m_iMagicHash;
}
uint64_t XQNode_t::GetFuzzyHash () const
{
if ( m_iFuzzyHash )
return m_iFuzzyHash;
XQOperator_e dZeroOp[2];
dZeroOp[0] = ( m_eOp==SPH_QUERY_PHRASE ? SPH_QUERY_PROXIMITY : m_eOp );
dZeroOp[1] = (XQOperator_e) 0;
ARRAY_FOREACH ( i, m_dWords )
m_iFuzzyHash = 100 + ( m_iFuzzyHash ^ sphFNV64 ( m_dWords[i].m_sWord.cstr() ) ); // +100 to make it non-transitive
ARRAY_FOREACH ( j, m_dChildren )
m_iFuzzyHash = 100 + ( m_iFuzzyHash ^ m_dChildren[j]->GetFuzzyHash () ); // +100 to make it non-transitive
m_iFuzzyHash += 1000000; // to immerse difference between parents and children
m_iFuzzyHash ^= sphFNV64 ( dZeroOp );
return m_iFuzzyHash;
}
void XQNode_t::SetOp ( XQOperator_e eOp, XQNode_t * pArg1, XQNode_t * pArg2 )
{
m_eOp = eOp;
m_dChildren.Reset();
if ( pArg1 )
{
m_dChildren.Add ( pArg1 );
pArg1->m_pParent = this;
}
if ( pArg2 )
{
m_dChildren.Add ( pArg2 );
pArg2->m_pParent = this;
}
}
int XQNode_t::FixupAtomPos()
{
assert ( m_eOp==SPH_QUERY_PROXIMITY && m_dWords.GetLength()>0 );
ARRAY_FOREACH ( i, m_dWords )
{
int iSub = m_dWords[i].m_iSkippedBefore-1;
if ( iSub>0 )
{
for ( int j = i; j < m_dWords.GetLength(); j++ )
m_dWords[j].m_iAtomPos -= iSub;
}
}
return m_dWords.Last().m_iAtomPos+1;
}
XQNode_t * XQNode_t::Clone ()
{
XQNode_t * pRet = new XQNode_t ( m_dSpec );
pRet->SetOp ( m_eOp );
pRet->m_dWords = m_dWords;
pRet->m_iOpArg = m_iOpArg;
pRet->m_iAtomPos = m_iAtomPos;
pRet->m_bVirtuallyPlain = m_bVirtuallyPlain;
pRet->m_bNotWeighted = m_bNotWeighted;
pRet->m_bPercentOp = m_bPercentOp;
if ( m_dChildren.GetLength()==0 )
return pRet;
pRet->m_dChildren.Reserve ( m_dChildren.GetLength() );
for ( int i = 0; i < m_dChildren.GetLength(); ++i )
{
pRet->m_dChildren.Add ( m_dChildren[i]->Clone() );
pRet->m_dChildren.Last()->m_pParent = pRet;
}
return pRet;
}
bool XQNode_t::ResetHash ()