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parser.y
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%define api.pure full
%define parse.trace
%define parse.error verbose
%name-prefix="module_yy"
%lex-param {core_yyscan_t scanner}
%parse-param {core_yyscan_t scanner}{module_yy_extra *mod} // 传入参数
%{
#include "parser.h"
#include "scanner.h"
void module_yyerror (core_yyscan_t scanner, module_yy_extra *mod, char const *msg);
extern int module_scanner_errmsg(const char *msg, core_yyscan_t *scanner);
extern int module_scanner_errposition(const int location, core_yyscan_t *scanner);
char colNameAttr[MAX_COLNAME_LENGTH];
char colNameRelType[MAX_COLNAME_LENGTH * 4];
char attrNum[MAX_COLNAME_LENGTH];
#ifdef _YYDEBUG
int yydebug = 1;
#endif
%}
%code requires
{
#include "module.h"
#include "ast.h"
}
%union
{
/* type for keywords*/
char *keyword;
int intval;
int64_t lintval;
double floatval;
char *strval;
int subtok;
AnnoyPattern *annoyptn;
AnyExpr *anyExpr;
ComparisionExpr_Stru *cmpexprstru;
Comparision_Stru *cmpStru;
CreateStmtClause *crtstmtcls;
DeleteStmtClause *dltstmtcls;
ExpPrInvocation *exprinvct;
IntLiteralPattern *intltpt;
InQueryCallStmtClause *inqryclstmtcls;
IntStringAppro *intStrApp;
List *list;
LiteralType *ltrlType;
MapLiterals *maplit;
MatchStmtClause *mchstmtcls;
MergeSetClause *mgstcls;
MergeSetExpression *mgstexp;
MtPtStmtClause *mtptstmtcls;
MtPtStmtClauseLoop *mtptstmtclslp;
NODEPattern *nodeptn;
Node *node;
NodeLabel *nodelbl;
OrderByStmtClause *odb;
PatternEleChain *ptnEleChn;
PatternList *ptnlist;
RdStmtClause *rdstcls;
ReadingStmtClause *rdstmtcls;
ReglQueryClause *rglqrcls;
RelationShip *relship;
RelationShipPattern *relshipptn;
ReturnCols *rtcols;
ReturnStmtClause *rtstmtcls;
SetStmtClause *ststmtcls;
SgPtStmtClause *sgptstmtcls;
SgStmtClause *sgstmtcls;
SingleUpdatingStmtClause *sgupdstmtcls;
SubCompExpr *subCompExpr;
UpdatingStmtClause *updstmtcls;
UnWindStmtClause *unwdstmtcls;
WhereStmtClause *whstmtcls;
WithStmtClause *wstmtcls;
YieldStmtClause *ydstmtcls;
} /* Generate YYSTYPE from these types: */
%token <keyword> ALL AND ANY AS ASC
%token <keyword> BY
%token <keyword> CALL CONTAINS COUNT CREATE
%token <keyword> DELETE DESC DISTINCT
%token <keyword> ENDS EOL EXISTS
%token <keyword> IN IS
%token <keyword> LIMIT
%token <keyword> MATCH MERGE
%token <keyword> NOT NULLX
%token <keyword> ON OR ORDER
%token <keyword> REMOVE RETURN
%token <keyword> SET
%token <keyword> UNION UNWIND
%token <keyword> WHERE WITH
%token <keyword> XOR
%token <keyword> YIELD
%token <intval> INTNUM
%token <intval> BOOL
%token <floatval> APPROXNUM
%token <strval> NAME
%token <strval> STRING
%token <strval> PPOINT
%token <strval> RIGHTARROW
%token <strval> LEFTARROW
%token <strval> PLUSEQUL
%left OR
%left XOR
%left AND
%left NOT
%left <subtok> COMPARISON
%left '+' '-'
%left '*' '/' '%'
%left '[' ']'
%left '(' ')'
%left '.'
%type <annoyptn> AnonymousPatternPart PatternElement
%type <anyExpr> FilterExpression
%type <cmpStru> Expression
%type <cmpexprstru> WhereExpression
%type <crtstmtcls> CreateClause
%type <dltstmtcls> DeleteClause
%type <exprinvct> ExplicitProcedureInvocation
%type <floatval> ApproxnumParam
%type <inqryclstmtcls> InQueryCall
%type <intltpt> IntegerLiteralPattern
%type <intval> AscDescOpt DistinctOpt LimitClause
%type <lintval> IntegerLiteral IntParam
%type <list> ApproxnumList
ExplicitProcedureClause ExplicitProcedureStmtClause
INExpression IntList
MapLiteralPattern MergeSetExpStmt MergeSetExp MultiPartQueryLoopClause
Pattern PatternElementChainClause PatternElementChains
RegularQuery ReturnExprList
SetClause StringList
%type <ltrlType> Literal
%type <maplit> PropertiesPattern MapLiteralClause
%type <mchstmtcls> MatchClause
%type <mgstexp> MergeClause
%type <mtptstmtclslp> MultiPartQuery
%type <node> ApproxnumParamNode
IntParamNode
MapLiteralPatternPart MergeSetExpStmtPart MultiPartQueryClause
PatternElementChain PatternPart
ReturnExpr
SetPartClause SingleQuery StringParamNode
WhereExpressionNode
%type <nodelbl> NodeLabelsPattern
%type <nodeptn> NodePattern
%type <odb> OrderByClause
%type <relship> RelationshipDetail
%type <relshipptn> RelationshipPattern
%type <rglqrcls> Cypher
%type <rtstmtcls> ReturnClause
%type <sgptstmtcls> SinglePartQuery
%type <sgupdstmtcls> SgUpdStmtClause
%type <strval> ColName
FuncOpt
IntegerLiteralColonPatternPart IntegerLiteralPatternPart
NodeLabel NodeLabels NumberLiteral
OptAsAlias
PropertyKey
RelTypeName RelTypeNamePattern RelationshipTypePattern
StringParam
Variable_Pattern
%type <subCompExpr> PartialComparisonExpression
%type <rdstcls> RdStmtClause
%type <rdstmtcls> ReadingClause
%type <updstmtcls> UpdatingClause
%type <unwdstmtcls> UnwindClause
%type <whstmtcls> WhereClause
%type <wstmtcls> WithClause
%type <ydstmtcls> YeildClause
%%
%start sexps; /* mod */
sexps:
/* Cypher ';' EOL --------- Used for Stdin */
Cypher ';'
{
_emit("Module List :RegularQuery");
if ($1 != NULL)
{
mod -> regl = $1;
return 0;
}
else
{
mod -> regl = NULL;
return 2;
}
}
;
Cypher:
RegularQuery /* ReglQueryClause */
{
_emit("Cypher:RegularQuery");
$$ = makeNode(ReglQueryClause);
$$ -> rgl = $1;
}
|
{
$$ = NULL;
}
;
RegularQuery:
SingleQuery /* List */
{
_emit("RegularQuery: ");
$$ = list_make1($1);
}
| RegularQuery UNION SingleQuery
{
_emit("RegularQuery: UNION ");
$$ = lappend($1, $3);
}
| RegularQuery UNION ALL SingleQuery
{
_emit("RegularQuery: UNION ");
$$ = lappend($1, $4);
}
;
SingleQuery:
SinglePartQuery /* Node -- SgStmtClause */
{
_emit("SingleQuery: SingleQuery -- ");
SgStmtClause *sgstcls;
sgstcls = makeNode(SgStmtClause);
sgstcls -> sg = $1;
sgstcls -> mt = NULL;
$$ = (Node *)sgstcls;
}
| MultiPartQuery
{
_emit("SingleQuery: MultiPartQuery");
SgStmtClause *sgstcls;
sgstcls = makeNode(SgStmtClause);
sgstcls -> sg = NULL;
sgstcls -> mt = $1;
$$ = (Node *)sgstcls;
}
;
MultiPartQuery: /* MtPtStmtClauseLoop */
MultiPartQueryLoopClause SinglePartQuery
{
_emit("MultiPartQuery:MultiPartQueryLoopClause SinglePartQuery");
$$ = makeNode(MtPtStmtClauseLoop);
$$ -> mtqrlp = $1;
$$ -> sg = $2;
}
;
MultiPartQueryLoopClause:
MultiPartQueryClause /* List */
{
_emit("MultiPartQueryLoopClause: MultiPartQueryClause");
$$ = list_make1($1);
}
| MultiPartQueryLoopClause MultiPartQueryClause
{
_emit("MultiPartQueryLoopClause: MultiPartQueryLoopClause MultiPartQueryClause");
$$ = lappend($1, $2);
}
;
MultiPartQueryClause: /* Node -- MtPtStmtClause */
RdStmtClause UpdatingClause WithClause
{
_emit("MultiPartQueryClause: RdStmtClause UpdatingClause WithClause");
MtPtStmtClause *mpsc;
mpsc = makeNode(MtPtStmtClause);
if ((mpsc -> rd = $1) != NULL)
mpsc -> ifrd = 1;
else
mpsc -> ifrd = 0;
mpsc -> upd = $2;
mpsc -> wth = $3;
$$ = (Node *)mpsc;
}
| RdStmtClause WithClause
{
_emit("MultiPartQueryClause: RdStmtClause WithClause");
MtPtStmtClause *mpsc;
mpsc = makeNode(MtPtStmtClause);
if ((mpsc -> rd = $1) != NULL)
mpsc -> ifrd = 1;
else
mpsc -> ifrd = 0;
mpsc -> upd = NULL;
mpsc -> wth = $2;
$$ = (Node *)mpsc;
}
;
WithClause: /* WithStmtClause */
WITH DistinctOpt ReturnExprList OrderByClause LimitClause WhereClause
{
_emit("WithClause");
$$ = makeNode(WithStmtClause);
$$->hasDistinct = $2; /* distinct */
$$->returnCols = $3;
if(($$->odb=$4) != NULL) /* order by*/
$$->hasOrderBy = 1;
else
$$->hasOrderBy = 0;
if (($$->limitNum = $5,$5<=0)) /* limit num*/
$$->hasLimit = false;
else
$$->hasLimit = true;
if(($$ -> wh = $6) != NULL)
$$ -> ifwh = 0;
else
$$ -> ifwh = 1;
}
;
SinglePartQuery: /* SgPtStmtClause */
RdStmtClause SgUpdStmtClause
{
_emit("SinglePartQuery: RdStmtClause UpdStmtClause");
$$ = makeNode(SgPtStmtClause);
if (($$ -> rdst = $1) != NULL)
$$ -> ifrd = 1;
else
$$ -> ifrd = 0;
$$ -> sgupd = $2;
}
;
RdStmtClause:
ReadingClause /* RdStmtClause */
{
_emit("RdStmtClause:");
$$ = makeNode(RdStmtClause);
$$ -> ifnull = 0;
$$ -> rdstcls = $1;
}
| /* NULL */
{
_emit("RdStmtClause: is NULL");
$$ = NULL;
}
;
/* SingleUpdatingStmtClause */
SgUpdStmtClause:
ReturnClause
{
_emit("UpdStmtClause : ReturnClause");
$$ = makeNode(SingleUpdatingStmtClause);
$$ -> branch = 0;
$$ -> upd = NULL;
$$ -> rt = $1;
}
| UpdatingClause
{
_emit("UpdStmtClause: UpdatingClause");
$$ = makeNode(SingleUpdatingStmtClause);
$$ -> branch = 1;
$$ -> upd = $1;
$$ -> rt = NULL;
}
| UpdatingClause ReturnClause
{
_emit("UpdStmtClause: UpdatingClause + ReturnClause");
$$ = makeNode(SingleUpdatingStmtClause);
$$ -> branch = 2;
$$ -> upd = $1;
$$ -> rt = $2;
}
;
ReadingClause: /* ReadingStmtClause */
MatchClause WhereClause
{
_emit("ReadingClause MatchClause WhereClause");
$$ = makeNode(ReadingStmtClause);
$$ -> cmdtype = 0;
$$ -> mch = $1;
$$ -> wh = $2;
$$ -> inq = NULL;
$$ -> unwd = NULL;
}
| InQueryCall /* CALL .... */
{
_emit("ReadingClause InQueryCall");
$$ = makeNode(ReadingStmtClause);
$$ -> cmdtype = 1;
$$ -> mch = NULL;
$$ -> wh = NULL;
$$ -> inq = $1;
$$ -> unwd = NULL;
}
| UnwindClause
{
_emit("ReadingClause UnwindClause");
$$ = makeNode(ReadingStmtClause);
$$ -> cmdtype = 1;
$$ -> mch = NULL;
$$ -> wh = NULL;
$$ -> inq = NULL;
$$ -> unwd = $1;
}
/* To Do: .... */
;
UnwindClause:
UNWIND WhereExpression AS ColName
{
_emit("UnwindClause:UNWIND WhereExpression AS ColName");
$$ = makeNode(UnWindStmtClause);
$$ -> root = $2;
if ($4 != NULL)
{
if (strlen($4) <= MAX_COLNAME_LENGTH)
memcpy($$ -> colAlias, $4, MAX_COLNAME_LENGTH);
else
ERROR("ColName is too long");
}
}
;
InQueryCall: /* InQueryCallStmtClause */
CALL ExplicitProcedureInvocation YeildClause
{
_emit("InQueryCall: CALL ExplicitProcedureInvocation YeildClause");
$$ = makeNode(InQueryCallStmtClause);
$$ -> exp = $2;
$$ -> yd = $3;
}
;
ExplicitProcedureInvocation: // ExpPrInvocation
ColName '(' ExplicitProcedureClause ')'
{
_emit("ColName '(' ExplicitProcedureClause ')'");
$$ = makeNode(ExpPrInvocation);
if (strlen($1) <= MAX_COLNAME_LENGTH)
memcpy($$ -> name, $1, MAX_COLNAME_LENGTH);
else
ERROR("Colname Is Too Big!");
$$ -> exwhls = 1;
if ($3 != NULL)
$$ -> whls = $3;
else
$$ -> whls = NULL;
}
;
ExplicitProcedureClause:
{
$$ = NULL;
}
| ExplicitProcedureStmtClause
{
$$ = $1;
}
;
ExplicitProcedureStmtClause: // List
WhereExpressionNode
{
_emit("ExplicitProcedureStmtClause: WhereExpressionNode");
$$ = list_make1($1);
}
| ExplicitProcedureStmtClause ',' WhereExpressionNode
{
_emit("ExplicitProcedureStmtClause: WhereExpressionNode , WhereExpressionNode , WhereExpressionNode ...");
$$ = lappend($1, $3);
}
;
WhereExpressionNode: // Node
WhereExpression
{
_emit("WhereExpressionNode : WhereExpression");
$$ = (Node *)$1;
}
;
YeildClause: /* YieldStmtClause */
{
_emit("YeildClause is NULL");
$$ = NULL;
}
| YIELD ColName OptAsAlias WhereClause
{
_emit("YIELD YieldItems,YieldItems,YieldItems...");
$$ = makeNode(YieldStmtClause);
if (strlen($2) <= MAX_COLNAME_LENGTH)
memcpy($$ -> returnCols, $2, MAX_COLNAME_LENGTH);
else
ERROR("Yield NAME is too long!");
$$ -> ydtype = 0;
if($3 != NULL)
{
if (strlen($3) <= MAX_COLNAME_LENGTH)
memcpy($$ -> colAlias, $3, MAX_COLNAME_LENGTH);
else
ERROR("colName is too long!");
$$ -> hascolalis = 1;
} else
$$ -> hascolalis = 0;
if ($4 != NULL)
$$ -> wh = NULL;
else
$$ -> wh = $4;
}
| YIELD '*' WhereClause
{
_emit("YIELD * ");
$$ = makeNode(YieldStmtClause);
memcpy($$ -> returnCols, "*", 1);
$$ -> ydtype = '*';
if ($3 != NULL)
$$ -> wh = $3;
else
$$ -> wh = NULL;
}
;
UpdatingClause:
/*
* typedef struct UpdatingStmtClause
* {
* NodeTag type;
* CreateStmtClause *crt;
* DeleteStmtClause *dlt;
* List *st;
* MergeSetExpression *mg;
* } UpdatingStmtClause;
*/
CreateClause /* UpdatingStmtClause */
{
_emit("UpdatingClause CreateClause");
$$ = makeNode(UpdatingStmtClause);
$$ -> crt = $1;
$$ -> dlt = NULL;
$$ -> ltype = 0;
$$ -> st = NULL;
$$ -> mg = NULL;
}
| DeleteClause
{
_emit("UpdatingClause DeleteClause");
$$ = makeNode(UpdatingStmtClause);
$$ -> crt = NULL;
$$ -> dlt = $1;
$$ -> ltype = 0;
$$ -> st = NULL;
$$ -> mg = NULL;
}
| SET SetClause /* List SetStmtClause */
{
_emit("Set :");
$$ = makeNode(UpdatingStmtClause);
$$ -> crt = NULL;
$$ -> dlt = NULL;
$$ -> ltype = 1; /* SET: ltype = 1 */
$$ -> st = $2;
$$ -> mg = NULL;
}
| REMOVE SetClause /* List SetStmtClause */
{
_emit("Set :");
$$ = makeNode(UpdatingStmtClause);
$$ -> crt = NULL;
$$ -> dlt = NULL;
$$ -> ltype = 2; /* REMOVE: ltype = 2 */
$$ -> st = $2;
$$ -> mg = NULL;
}
| MERGE MergeClause
{
$$ = makeNode(UpdatingStmtClause);
$$ -> crt = NULL;
$$ -> dlt = NULL;
$$ -> ltype = 3; /* REMOVE: ltype = 2 */
$$ -> st = NULL;
$$ -> mg = $2;
}
/* ToDO: ...... */
;
MergeClause:
PatternElement MergeSetExp
{
$$ = makeNode(MergeSetExpression);
$$ -> annoyPattern = $1;
if ($2 == NULL)
$$ -> mgstexp = NULL;
else
$$ -> mgstexp = $2;
}
;
MergeSetExp:
{
$$ = NULL;
}
| MergeSetExpStmt
{
$$ = $1;
}
;
MergeSetExpStmt:
MergeSetExpStmt MergeSetExpStmtPart
{
$$ = lappend($1, $2);
}
| MergeSetExpStmtPart
{
$$ = list_make1($1);
}
;
MergeSetExpStmtPart:
ON MATCH SetClause
{
MergeSetClause *mgsl;
mgsl = makeNode(MergeSetClause);
mgsl -> type = 0; //MATCH
mgsl -> st = $3;
$$ = (Node *)mgsl;
}
| ON CREATE SetClause
{
MergeSetClause *mgsl;
mgsl = makeNode(MergeSetClause);
mgsl -> type = 1; //CREATE
mgsl -> st = $3;
$$ = (Node *)mgsl;
}
;
SetClause:
SetPartClause /* List */
{
_emit("SetClause:SetPartClause");
$$ = list_make1($1);
}
| SetClause ',' SetPartClause
{
_emit("SetClause: SetPartClause ',' SetPartClause ... ");
$$ = lappend($1,$3);
}
;
SetPartClause:
/*
typedef struct SetStmtClause
{
NodeTag type;
int exptype;
char name[MAX_COLNAME_LENGTH];
ComparisionExpr_Stru *wh;
MapLiterals *mp;
} SetStmtClause;
*/
Variable_Pattern COMPARISON WhereExpression /* Variable_Pattern = Expression */
{
_emit("SetPartClause = ");
SetStmtClause *set;
set = makeNode(SetStmtClause);
if ($2 == 4) // COMPARISON : '='
set -> exptype = 1;
else
ERROR("Expected \"=\" In SET Expression");
if (strlen($1) <= MAX_COLNAME_LENGTH)
memcpy(set -> name, $1, strlen($1));
else
ERROR("colName is too long!");
set -> wh = $3;
set -> mp = NULL;
$$ = (Node *)set;
}
| Variable_Pattern PLUSEQUL WhereExpression /* Variable_Pattern += Expression */
{
_emit("SetPartClause += ");
SetStmtClause *set;
set = makeNode(SetStmtClause);
set -> exptype = 2;
if (strlen($1) <= MAX_COLNAME_LENGTH)
memcpy(set -> name, $1, strlen($1));
else
ERROR("colName is too long!");
set -> wh = $3;
set -> mp = NULL;
$$ = (Node *)set;
}
| Variable_Pattern COMPARISON '{' MapLiteralClause '}'
{
_emit("SetPartClause = {name:'Value', name='Value' ...}");
SetStmtClause *set;
set = makeNode(SetStmtClause);
if ($2 == 4) // COMPARISON : '='
set -> exptype = 3;
else
ERROR("Expected \"=\" In SET Expression");
if (strlen($1) <= MAX_COLNAME_LENGTH)
memcpy(set -> name, $1, strlen($1));
else
ERROR("colName is too long!");
set -> wh = NULL;
set -> mp = $4;
$$ = (Node *)set;
}
| Variable_Pattern PLUSEQUL '{' MapLiteralClause '}' /* Variable_Pattern += Expression */
{
_emit("SetPartClause += {name:'Value', name='Value' ...}");
SetStmtClause *set;
set = makeNode(SetStmtClause);
set -> exptype = 4;
if (strlen($1) <= MAX_COLNAME_LENGTH)
memcpy(set -> name, $1, strlen($1));
else
ERROR("colName is too long!");
set -> wh = NULL;
set -> mp = $4;
$$ = (Node *)set;
}
| Variable_Pattern ':' WhereExpression /* Variable_Pattern = Expression */
{
_emit("SetPartClause : ");
SetStmtClause *set;
set = makeNode(SetStmtClause);
set -> exptype = 5;
if (strlen($1) <= MAX_COLNAME_LENGTH)
memcpy(set -> name, $1, strlen($1));
else
ERROR("colName is too long!");
set -> wh = $3;
set -> mp = NULL;
$$ = (Node *)set;
}
| Variable_Pattern /* Variable_Pattern = Expression */
{
_emit("SetPartClause : ");
SetStmtClause *set;
set = makeNode(SetStmtClause);
set -> exptype = 5;
if ($1 != NULL)
{
if (strlen($1) <= MAX_COLNAME_LENGTH)
memcpy(set -> name, $1, strlen($1));
else
ERROR("colName is too long!");
}
set -> wh = NULL;
set -> mp = NULL;
$$ = (Node *)set;
}
;
/****************************************************************************/
CreateClause:
CREATE Pattern
{
_emit("Create");
$$ = makeNode(CreateStmtClause);
$$ -> patternList = $2;
}
;
DeleteClause:
DELETE WhereExpression
{
_emit("delete where");
$$ = makeNode(DeleteStmtClause);
$$ -> root = $2;
}
;
/* Match Clause */
MatchClause:
MATCH Pattern
{
_emit("MatchClause");
$$ = makeNode(MatchStmtClause);
$$ -> patternList = $2;
}
;
Pattern:
PatternPart
{
_emit("Pattern");
$$ = list_make1($1);
}
| Pattern ',' PatternPart
{
_emit("Patterns: , ");
$$ = lappend($1, $3);
}
;
PatternPart:
AnonymousPatternPart
{
_emit("Pattern_part");
PatternList *ptl ;
ptl = makeNode(PatternList);
ptl -> onlyAnnoyPtnPart = false;
ptl -> annoyPattern = $1;
$$ = (Node *)ptl;
}
| ColName COMPARISON AnonymousPatternPart
{
_emit("pattern_part %d ",$2);
PatternList *ptl ;
ptl = makeNode(PatternList);
ptl -> onlyAnnoyPtnPart = true;
if (strlen($1) <= MAX_COLNAME_LENGTH)
memcpy(ptl -> colName, $1, strlen($1));
else
ERROR("colName is too long!");
ptl -> comparision = $2; // >> >= > ....
ptl -> annoyPattern = $3;
$$ = (Node *)ptl;
}
;
AnonymousPatternPart:
PatternElement
{
_emit("AnonymousPatternPart");
$$ = $1;
}
;
PatternElement:
'(' PatternElement ')'
{
_emit("( PatternElement )");
$$ = makeNode(AnnoyPattern);
$$ -> ifName = false;
}
| NAME '(' PatternElement ')'
{
_emit("Function Name ( )");
$$ = makeNode(AnnoyPattern);
$$ -> ifName = true;
}
| NodePattern PatternElementChainClause
{
_emit("NodePattern : ");
$$ = makeNode(AnnoyPattern);
$$ -> ndPattern = $1;
if ($2 == NULL)
{
$$ -> exptEleChain = false;
$$ -> ptnElementChain = NULL;
}
else
{
$$ -> exptEleChain = true;
$$ -> ptnElementChain = $2;
}
}
;
PatternElementChainClause:
{
_emit("");
$$ = NULL;
}
| PatternElementChains
{
$$ = $1;
}
;
PatternElementChains:
PatternElementChain
{
_emit("PatternElementChain");
$$ = list_make1($1);
}
| PatternElementChains PatternElementChain
{
_emit("PatternElementChain PatternElementChain ...");
$$ = lappend($1,$2);
}
;
PatternElementChain:
RelationshipPattern NodePattern
{
_emit("PatternElementChain");
PatternEleChain *ptelch ;
ptelch = makeNode(PatternEleChain);
ptelch -> ndPattern = $2;
ptelch -> relshipPattern = $1;
$$ = (Node *)ptelch;
}
;
NodePattern:
'(' Variable_Pattern NodeLabelsPattern PropertiesPattern ')'
{
_emit("NODEPattern");
$$ = makeNode(NODEPattern);
if ($2 == NULL)
$$ -> vrbPattern = false;
else
{
$$ -> vrbPattern = true;
if (strlen($2) <= MAX_COLNAME_LENGTH)
memcpy($$ -> colName,$2,strlen($2));
else
ERROR("colName is too long!");
}
if ($3 == NULL)
$$ -> ifnodeLab = false;
else
{
$$ -> ifnodeLab = true;
$$ -> nodeLab = $3;
}
if ($4 == NULL)
{
$$ -> exmaplit = false;
$$ -> maplit = NULL;
}
else
{
$$ -> exmaplit = true;
$$ -> maplit = $4;
}
}
;
Variable_Pattern:
{
_emit("Variable is NULL");
$$ = NULL;
}
| ColName
{
_emit("Variable:ColName");
$$ = $1;
}
;
NodeLabelsPattern:
{
_emit("NodeLabelsPattern");
$$ = NULL;
}
| NodeLabel NodeLabels