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Overview
| Comment: | Back off of the parser optimization in the previous check-in, slightly, to preserve some backwards compatibility regarding some undocumented behavior in the '#AAA' style query parameter. |
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| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
ef1966c2469a0f5dbdb31a0287bd37ba |
| User & Date: | drh 2016-04-11 01:43:33 |
Context
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2016-04-11
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| 13:36 | Remove the VdbeOp.opflags field and its associated initialization overhead. Update mkopcodeh.tcl to reorder opcode numbers to help the resolveP2Values() routine run faster. check-in: 099478fa user: drh tags: trunk | |
| 09:39 | Update this branch with the latest changes from the trunk. check-in: 982b753d user: dan tags: tempfiles-lazy-open | |
| 01:43 | Back off of the parser optimization in the previous check-in, slightly, to preserve some backwards compatibility regarding some undocumented behavior in the '#AAA' style query parameter. check-in: ef1966c2 user: drh tags: trunk | |
| 01:26 | Small size reduction and performance improvement in the parser. check-in: 16df7128 user: drh tags: trunk | |
Changes
Changes to src/parse.y.
867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 |
Expr *temp4 = sqlite3PExpr(pParse, TK_DOT, temp2, temp3, 0);
spanSet(&A,&X,&Z); /*A-overwrites-X*/
A.pExpr = sqlite3PExpr(pParse, TK_DOT, temp1, temp4, 0);
}
term(A) ::= INTEGER|FLOAT|BLOB(X). {spanExpr(&A,pParse,@X,X);/*A-overwrites-X*/}
term(A) ::= STRING(X). {spanExpr(&A,pParse,@X,X);/*A-overwrites-X*/}
expr(A) ::= VARIABLE(X). {
if( X.z[0]!='#' ){
spanExpr(&A, pParse, TK_VARIABLE, X);
sqlite3ExprAssignVarNumber(pParse, A.pExpr);
}else{
/* When doing a nested parse, one can include terms in an expression
** that look like this: #1 #2 ... These terms refer to registers
** in the virtual machine. #N is the N-th register. */
Token t = X; /*A-overwrites-X*/
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867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 |
Expr *temp4 = sqlite3PExpr(pParse, TK_DOT, temp2, temp3, 0);
spanSet(&A,&X,&Z); /*A-overwrites-X*/
A.pExpr = sqlite3PExpr(pParse, TK_DOT, temp1, temp4, 0);
}
term(A) ::= INTEGER|FLOAT|BLOB(X). {spanExpr(&A,pParse,@X,X);/*A-overwrites-X*/}
term(A) ::= STRING(X). {spanExpr(&A,pParse,@X,X);/*A-overwrites-X*/}
expr(A) ::= VARIABLE(X). {
if( !(X.z[0]=='#' && sqlite3Isdigit(X.z[1])) ){
spanExpr(&A, pParse, TK_VARIABLE, X);
sqlite3ExprAssignVarNumber(pParse, A.pExpr);
}else{
/* When doing a nested parse, one can include terms in an expression
** that look like this: #1 #2 ... These terms refer to registers
** in the virtual machine. #N is the N-th register. */
Token t = X; /*A-overwrites-X*/
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