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Overview
| Comment: | Do not attempt to walk a TokenOnly or SpanOnly expression tree node. Ticket #3791. (CVS 6469) |
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| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: | 8362d883248f00a8ec7294bf027fd19758aec5f2 |
| User & Date: | drh 2009-04-08 12:21:31 |
Context
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2009-04-08
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| 13:51 | Minor refactoring of the expression-compaction logic for clarity of presentation. New comments added. The EXPRDUP_DISTINCTSPAN flag is removed as obsolete. (CVS 6470) check-in: 44ded2ea user: drh tags: trunk | |
| 12:21 | Do not attempt to walk a TokenOnly or SpanOnly expression tree node. Ticket #3791. (CVS 6469) check-in: 8362d883 user: drh tags: trunk | |
| 11:49 | Add a comment to printf.c - no changes to code. (CVS 6468) check-in: ee5a4a0e user: drh tags: trunk | |
Changes
Changes to src/walker.c.
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** May you find forgiveness for yourself and forgive others. ** May you share freely, never taking more than you give. ** ************************************************************************* ** This file contains routines used for walking the parser tree for ** an SQL statement. ** ** $Id: walker.c,v 1.2 2009/02/19 14:39:25 danielk1977 Exp $ */ #include "sqliteInt.h" #include <stdlib.h> #include <string.h> /* ................................................................................ ** ** The return value from this routine is WRC_Abort to abandon the tree walk ** and WRC_Continue to continue. */ int sqlite3WalkExpr(Walker *pWalker, Expr *pExpr){ int rc; if( pExpr==0 ) return WRC_Continue; rc = pWalker->xExprCallback(pWalker, pExpr); if( rc==WRC_Continue ){ if( sqlite3WalkExpr(pWalker, pExpr->pLeft) ) return WRC_Abort; if( sqlite3WalkExpr(pWalker, pExpr->pRight) ) return WRC_Abort; if( ExprHasProperty(pExpr, EP_xIsSelect) ){ if( sqlite3WalkSelect(pWalker, pExpr->x.pSelect) ) return WRC_Abort; }else{ if( sqlite3WalkExprList(pWalker, pExpr->x.pList) ) return WRC_Abort; } |
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** May you find forgiveness for yourself and forgive others. ** May you share freely, never taking more than you give. ** ************************************************************************* ** This file contains routines used for walking the parser tree for ** an SQL statement. ** ** $Id: walker.c,v 1.3 2009/04/08 12:21:31 drh Exp $ */ #include "sqliteInt.h" #include <stdlib.h> #include <string.h> /* ................................................................................ ** ** The return value from this routine is WRC_Abort to abandon the tree walk ** and WRC_Continue to continue. */ int sqlite3WalkExpr(Walker *pWalker, Expr *pExpr){ int rc; if( pExpr==0 ) return WRC_Continue; testcase( ExprHasProperty(pExpr, EP_TokenOnly) ); testcase( ExprHasProperty(pExpr, EP_SpanOnly) ); testcase( ExprHasProperty(pExpr, EP_Reduced) ); rc = pWalker->xExprCallback(pWalker, pExpr); if( rc==WRC_Continue && !ExprHasAnyProperty(pExpr,EP_TokenOnly|EP_SpanOnly) ){ if( sqlite3WalkExpr(pWalker, pExpr->pLeft) ) return WRC_Abort; if( sqlite3WalkExpr(pWalker, pExpr->pRight) ) return WRC_Abort; if( ExprHasProperty(pExpr, EP_xIsSelect) ){ if( sqlite3WalkSelect(pWalker, pExpr->x.pSelect) ) return WRC_Abort; }else{ if( sqlite3WalkExprList(pWalker, pExpr->x.pList) ) return WRC_Abort; } |
Added test/tkt3791.test.
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# 2009 April 2 # # The author disclaims copyright to this source code. In place of # a legal notice, here is a blessing: # # May you do good and not evil. # May you find forgiveness for yourself and forgive others. # May you share freely, never taking more than you give. # #*********************************************************************** # # Ticket #3791: A segfault when inserting into a table that contains # an arbitrary expression as its default value. # # $Id: tkt3791.test,v 1.1 2009/04/08 12:21:31 drh Exp $ set testdir [file dirname $argv0] source $testdir/tester.tcl do_test tkt3791-1.1 { db eval { CREATE TABLE t1(x, y DEFAULT(datetime('now'))); INSERT INTO t1(x) VALUES(1); SELECT x, length(y) FROM t1; } } {1 19} finish_test |