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Overview
Comment: | Small size reduction and performance improvement in the parser. |
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Downloads: | Tarball | ZIP archive |
Timelines: | family | ancestors | descendants | both | trunk |
Files: | files | file ages | folders |
SHA1: |
16df71284bf081c8b3d3aa57c129a070 |
User & Date: | drh 2016-04-11 01:26:31.547 |
Context
2016-04-11
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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: ef1966c246 user: drh tags: trunk) | |
01:26 | Small size reduction and performance improvement in the parser. (check-in: 16df71284b user: drh tags: trunk) | |
01:06 | Factor out the common operation of setting the Expr.x.pSelect field of an Expr object into a subroutine. (check-in: 6a5cceee48 user: drh tags: trunk) | |
Changes
Changes to src/parse.y.
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867 868 869 870 871 872 873 | 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). { | | > | > > > < < < | 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 | 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*/ assert( t.n>=2 ); spanSet(&A, &t, &t); if( pParse->nested==0 ){ sqlite3ErrorMsg(pParse, "near \"%T\": syntax error", &t); A.pExpr = 0; }else{ A.pExpr = sqlite3PExpr(pParse, TK_REGISTER, 0, 0, &t); if( A.pExpr ) sqlite3GetInt32(&t.z[1], &A.pExpr->iTable); } } } expr(A) ::= expr(A) COLLATE ids(C). { A.pExpr = sqlite3ExprAddCollateToken(pParse, A.pExpr, &C, 1); A.zEnd = &C.z[C.n]; } %ifndef SQLITE_OMIT_CAST |
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