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Overview
| Comment: | Minor grammar changes that help the parser run faster by reducing the number of NUL rule reductions. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA3-256: |
cfd1b00592bd550e444dfc7b6a6a93c7 |
| User & Date: | drh 2018-07-27 22:14:50 |
Context
|
2018-07-27
| ||
| 22:55 | When doing a DROP VIEW do not try to delete entries from the sqlite_stat1 table as there are none. check-in: 7efdba2b user: drh tags: trunk | |
| 22:14 | Minor grammar changes that help the parser run faster by reducing the number of NUL rule reductions. check-in: cfd1b005 user: drh tags: trunk | |
| 20:45 | Enhance Makefile for MSVC to support building the shell tool without using the amalgamation. check-in: 3d815d83 user: mistachkin tags: trunk | |
Changes
Changes to src/parse.y.
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A = pRhs;
}
%type multiselect_op {int}
multiselect_op(A) ::= UNION(OP). {A = @OP; /*A-overwrites-OP*/}
multiselect_op(A) ::= UNION ALL. {A = TK_ALL;}
multiselect_op(A) ::= EXCEPT|INTERSECT(OP). {A = @OP; /*A-overwrites-OP*/}
%endif SQLITE_OMIT_COMPOUND_SELECT
oneselect(A) ::= SELECT distinct(D) selcollist(W) from(X) where_opt(Y)
groupby_opt(P) having_opt(Q)
%ifndef SQLITE_OMIT_WINDOWFUNC
windowdefn_opt(R)
%endif
orderby_opt(Z) limit_opt(L). {
A = sqlite3SelectNew(pParse,W,X,Y,P,Q,Z,D,L);
#ifndef SQLITE_OMIT_WINDOWFUNC
if( A ){
A->pWinDefn = R;
}else{
sqlite3WindowListDelete(pParse->db, R);
}
#endif /* SQLITE_OMIT_WINDOWFUNC */
}
oneselect(A) ::= values(A).
%type values {Select*}
%destructor values {sqlite3SelectDelete(pParse->db, $$);}
values(A) ::= VALUES LP nexprlist(X) RP. {
A = sqlite3SelectNew(pParse,X,0,0,0,0,0,SF_Values,0);
}
................................................................................
}
%ifndef SQLITE_OMIT_CAST
expr(A) ::= CAST LP expr(E) AS typetoken(T) RP. {
A = sqlite3ExprAlloc(pParse->db, TK_CAST, &T, 1);
sqlite3ExprAttachSubtrees(pParse->db, A, E, 0);
}
%endif SQLITE_OMIT_CAST
expr(A) ::= id(X) LP distinct(D) exprlist(Y) RP
%ifndef SQLITE_OMIT_WINDOWFUNC
over_opt(Z)
%endif
. {
if( Y && Y->nExpr>pParse->db->aLimit[SQLITE_LIMIT_FUNCTION_ARG] ){
sqlite3ErrorMsg(pParse, "too many arguments on function %T", &X);
}
A = sqlite3ExprFunction(pParse, Y, &X);
if( D==SF_Distinct && A ){
A->flags |= EP_Distinct;
}
sqlite3WindowAttach(pParse, A, Z);
}
expr(A) ::= id(X) LP STAR RP
%ifndef SQLITE_OMIT_WINDOWFUNC
over_opt(Z)
%endif
. {
A = sqlite3ExprFunction(pParse, 0, &X);
sqlite3WindowAttach(pParse, A, Z);
}
term(A) ::= CTIME_KW(OP). {
A = sqlite3ExprFunction(pParse, 0, &OP);
}
expr(A) ::= LP nexprlist(X) COMMA expr(Y) RP. {
ExprList *pList = sqlite3ExprListAppend(pParse, X, Y);
A = sqlite3PExpr(pParse, TK_VECTOR, 0, 0);
................................................................................
frame_bound_e(A) ::= frame_bound(X). { A = X; }
frame_bound_e(A) ::= UNBOUNDED FOLLOWING. {A.eType = TK_UNBOUNDED; A.pExpr = 0;}
frame_bound(A) ::= expr(X) PRECEDING. { A.eType = TK_PRECEDING; A.pExpr = X; }
frame_bound(A) ::= CURRENT ROW. { A.eType = TK_CURRENT ; A.pExpr = 0; }
frame_bound(A) ::= expr(X) FOLLOWING. { A.eType = TK_FOLLOWING; A.pExpr = X; }
%type windowdefn_opt {Window*}
%destructor windowdefn_opt {sqlite3WindowListDelete(pParse->db, $$);}
windowdefn_opt(A) ::= . { A = 0; }
windowdefn_opt(A) ::= WINDOW windowdefn_list(B). { A = B; }
%type over_opt {Window*}
%destructor over_opt {sqlite3WindowDelete(pParse->db, $$);}
over_opt(A) ::= . { A = 0; }
over_opt(A) ::= filter_opt(W) OVER window(Z). {
A = Z;
assert( A!=0 );
A->pFilter = W;
}
over_opt(A) ::= filter_opt(W) OVER nm(Z). {
A = (Window*)sqlite3DbMallocZero(pParse->db, sizeof(Window));
if( A ){
A->zName = sqlite3DbStrNDup(pParse->db, Z.z, Z.n);
A->pFilter = W;
}else{
sqlite3ExprDelete(pParse->db, W);
}
}
filter_opt(A) ::= . { A = 0; }
filter_opt(A) ::= FILTER LP WHERE expr(X) RP. { A = X; }
%endif /* SQLITE_OMIT_WINDOWFUNC */
|
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A = pRhs;
}
%type multiselect_op {int}
multiselect_op(A) ::= UNION(OP). {A = @OP; /*A-overwrites-OP*/}
multiselect_op(A) ::= UNION ALL. {A = TK_ALL;}
multiselect_op(A) ::= EXCEPT|INTERSECT(OP). {A = @OP; /*A-overwrites-OP*/}
%endif SQLITE_OMIT_COMPOUND_SELECT
oneselect(A) ::= SELECT distinct(D) selcollist(W) from(X) where_opt(Y)
groupby_opt(P) having_opt(Q)
orderby_opt(Z) limit_opt(L). {
A = sqlite3SelectNew(pParse,W,X,Y,P,Q,Z,D,L);
}
%ifndef SQLITE_OMIT_WINDOWFUNC
oneselect(A) ::= SELECT distinct(D) selcollist(W) from(X) where_opt(Y)
groupby_opt(P) having_opt(Q) window_clause(R)
orderby_opt(Z) limit_opt(L). {
A = sqlite3SelectNew(pParse,W,X,Y,P,Q,Z,D,L);
if( A ){
A->pWinDefn = R;
}else{
sqlite3WindowListDelete(pParse->db, R);
}
}
%endif
oneselect(A) ::= values(A).
%type values {Select*}
%destructor values {sqlite3SelectDelete(pParse->db, $$);}
values(A) ::= VALUES LP nexprlist(X) RP. {
A = sqlite3SelectNew(pParse,X,0,0,0,0,0,SF_Values,0);
}
................................................................................
}
%ifndef SQLITE_OMIT_CAST
expr(A) ::= CAST LP expr(E) AS typetoken(T) RP. {
A = sqlite3ExprAlloc(pParse->db, TK_CAST, &T, 1);
sqlite3ExprAttachSubtrees(pParse->db, A, E, 0);
}
%endif SQLITE_OMIT_CAST
expr(A) ::= id(X) LP distinct(D) exprlist(Y) RP. {
if( Y && Y->nExpr>pParse->db->aLimit[SQLITE_LIMIT_FUNCTION_ARG] ){
sqlite3ErrorMsg(pParse, "too many arguments on function %T", &X);
}
A = sqlite3ExprFunction(pParse, Y, &X);
if( D==SF_Distinct && A ){
A->flags |= EP_Distinct;
}
}
expr(A) ::= id(X) LP STAR RP. {
A = sqlite3ExprFunction(pParse, 0, &X);
}
%ifndef SQLITE_OMIT_WINDOWFUNC
expr(A) ::= id(X) LP distinct(D) exprlist(Y) RP over_clause(Z). {
if( Y && Y->nExpr>pParse->db->aLimit[SQLITE_LIMIT_FUNCTION_ARG] ){
sqlite3ErrorMsg(pParse, "too many arguments on function %T", &X);
}
A = sqlite3ExprFunction(pParse, Y, &X);
if( D==SF_Distinct && A ){
A->flags |= EP_Distinct;
}
sqlite3WindowAttach(pParse, A, Z);
}
expr(A) ::= id(X) LP STAR RP over_clause(Z). {
A = sqlite3ExprFunction(pParse, 0, &X);
sqlite3WindowAttach(pParse, A, Z);
}
%endif
term(A) ::= CTIME_KW(OP). {
A = sqlite3ExprFunction(pParse, 0, &OP);
}
expr(A) ::= LP nexprlist(X) COMMA expr(Y) RP. {
ExprList *pList = sqlite3ExprListAppend(pParse, X, Y);
A = sqlite3PExpr(pParse, TK_VECTOR, 0, 0);
................................................................................
frame_bound_e(A) ::= frame_bound(X). { A = X; }
frame_bound_e(A) ::= UNBOUNDED FOLLOWING. {A.eType = TK_UNBOUNDED; A.pExpr = 0;}
frame_bound(A) ::= expr(X) PRECEDING. { A.eType = TK_PRECEDING; A.pExpr = X; }
frame_bound(A) ::= CURRENT ROW. { A.eType = TK_CURRENT ; A.pExpr = 0; }
frame_bound(A) ::= expr(X) FOLLOWING. { A.eType = TK_FOLLOWING; A.pExpr = X; }
%type window_clause {Window*}
%destructor window_clause {sqlite3WindowListDelete(pParse->db, $$);}
window_clause(A) ::= WINDOW windowdefn_list(B). { A = B; }
%type over_clause {Window*}
%destructor over_clause {sqlite3WindowDelete(pParse->db, $$);}
over_clause(A) ::= filter_opt(W) OVER window(Z). {
A = Z;
assert( A!=0 );
A->pFilter = W;
}
over_clause(A) ::= filter_opt(W) OVER nm(Z). {
A = (Window*)sqlite3DbMallocZero(pParse->db, sizeof(Window));
if( A ){
A->zName = sqlite3DbStrNDup(pParse->db, Z.z, Z.n);
A->pFilter = W;
}else{
sqlite3ExprDelete(pParse->db, W);
}
}
filter_opt(A) ::= . { A = 0; }
filter_opt(A) ::= FILTER LP WHERE expr(X) RP. { A = X; }
%endif /* SQLITE_OMIT_WINDOWFUNC */
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