Add the SQLITE_LIMIT_TRIGGER_DEPTH option to sqlite3_limit().

FossilOrigin-Name: d7dc8b433691745b3842282569f1573d1e057963

manifest

@@ -1,5 +1,8 @@
-C Merge\s[/src/vinfo/1958db4493461b3a54217a6a45f2730287107860|1958db4493]\sand\s[/src/vinfo/26cd015c0ee1c18dd37f11b47ce35cfa320b3514|26cd015c0e].
+-----BEGIN PGP SIGNED MESSAGE-----
-D 2009-09-07T17:41:48
+Hash: SHA1
+
+C Add\sthe\sSQLITE_LIMIT_TRIGGER_DEPTH\soption\sto\ssqlite3_limit().
+D 2009-09-07T18:14:02
 F Makefile.arm-wince-mingw32ce-gcc fcd5e9cd67fe88836360bb4f9ef4cb7f8e2fb5a0
 F Makefile.in 73ddeec9dd10b85876c5c2ce1fdce627e1dcc7f8
 F Makefile.linux-gcc d53183f4aa6a9192d249731c90dbdffbd2c68654
@@ -126,7 +129,7 @@ F src/journal.c e00df0c0da8413ab6e1bb7d7cab5665d4a9000d0
 F src/legacy.c 303b4ffcf1ae652fcf5ef635846c563c254564f6
 F src/lempar.c 0c4d1ab0a5ef2b0381eb81a732c54f68f27a574d
 F src/loadext.c 0e88a335665db0b2fb4cece3e49dcb65d832635a
-F src/main.c 6688d56c2437eed4a8bbbb2fd517c59ff927f337
+F src/main.c e33c4d17cc0a398847f5c9926ccdfe7e66605b87
 F src/malloc.c b1725183bcc4ce2e569f1b65da844dc3e4c7a643
 F src/mem0.c f2f84062d1f35814d6535c9f9e33de3bfb3b132c
 F src/mem1.c e6d5c23941288df8191b8a98c28e3f57771e2270
@@ -159,16 +162,16 @@ F src/printf.c 508a1c59433353552b6553cba175eaa7331f8fc1
 F src/random.c 676b9d7ac820fe81e6fb2394ac8c10cff7f38628
 F src/resolve.c 941843301f6fda6c6350839c6955a172441a0782
 F src/rowset.c c64dafba1f9fd876836c8db8682966b9d197eb1f
-F src/select.c 8bc7347fe88cf16ac2cb1a37fb918d1417ab4142
+F src/select.c 95809555bf3614d0043d635c85948520fe21e741
 F src/shell.c db2643650b9268df89a4bedca3f1c6d9e786f1bb
-F src/sqlite.h.in 94052f827890de6fb7c913b95507076909261d9b
+F src/sqlite.h.in e5949b46f9a05aadde22848f92fae5c9ba87ee0e
 F src/sqlite3ext.h 1db7d63ab5de4b3e6b83dd03d1a4e64fef6d2a17
-F src/sqliteInt.h 0abbf6e260e19e41f1d57dbf02b1283f77cce81a
+F src/sqliteInt.h 13bb8c9abbdfe33c1fe685921b4a36e484a3d108
-F src/sqliteLimit.h ffe93f5a0c4e7bd13e70cd7bf84cfb5c3465f45d
+F src/sqliteLimit.h be44f7f46c14bb4c21870074b1e6f1ac0abd6701
 F src/status.c 237b193efae0cf6ac3f0817a208de6c6c6ef6d76
 F src/table.c cc86ad3d6ad54df7c63a3e807b5783c90411a08d
 F src/tclsqlite.c 5eea5025c370d3a91ce0415f9d46f96fdc7aef44
-F src/test1.c eacb3456a9419191f42a0f601e12ca8a424a6de1
+F src/test1.c 83a685fa2c96f005934ed09146b53522b1aa533e
 F src/test2.c 0de743ec8890ca4f09e0bce5d6d5a681f5957fec
 F src/test3.c 2445c2beb5e7a0c91fd8136dc1339ec369a24898
 F src/test4.c f79ab52d27ff49b784b631a42e2ccd52cfd5c84c
@@ -205,7 +208,7 @@ F src/update.c 3e97974baa914f32d4ae690fa0cb7281aff8cd39
 F src/utf.c 99cf927eabb104621ba889ac0dd075fc1657ad30
 F src/util.c 59d4e9456bf1fe581f415a783fa0cee6115c8f35
 F src/vacuum.c 3fe0eebea6d2311c1c2ab2962887d11f7a4dcfb0
-F src/vdbe.c a158f0f3efbf2a66037dbfe4024398719cf61596
+F src/vdbe.c 4e3c6895475cf8a9930cb39f7e9855acb7019349
 F src/vdbe.h 080fe6bc1264438becb8bf9b9f3c84074c336b78
 F src/vdbeInt.h 6094e60f64d7a9d4352d4e6b90d1219dce947ad9
 F src/vdbeapi.c 8d5013ab6104be757c208a70ffb191cc27d2b688
@@ -682,7 +685,7 @@ F test/trigger8.test 30cb0530bd7c4728055420e3f739aa00412eafa4
 F test/trigger9.test 5b0789f1c5c4600961f8e68511b825b87be53e31
 F test/triggerA.test 0718ad2d9bfef27c7af00e636df79bee6b988da7
 F test/triggerB.test 56780c031b454abac2340dbb3b71ac5c56c3d7fe
-F test/triggerC.test 6ee1611c7ebd8ac892e67bd0e6e2ef7d9229dbc8
+F test/triggerC.test cc43b4a62f447a0b0ec76ce511758c460c049c83
 F test/types.test 9a825ec8eea4e965d7113b74c76a78bb5240f2ac
 F test/types2.test 3555aacf8ed8dc883356e59efc314707e6247a84
 F test/types3.test a0f66bf12f80fad89493535474f7a6d16fa58150
@@ -750,7 +753,14 @@ F tool/speedtest2.tcl ee2149167303ba8e95af97873c575c3e0fab58ff
 F tool/speedtest8.c 2902c46588c40b55661e471d7a86e4dd71a18224
 F tool/speedtest8inst1.c 293327bc76823f473684d589a8160bde1f52c14e
 F tool/vdbe-compress.tcl d70ea6d8a19e3571d7ab8c9b75cba86d1173ff0f
-P 1958db4493461b3a54217a6a45f2730287107860 26cd015c0ee1c18dd37f11b47ce35cfa320b3514
+P ecbe0832be77599c7cc66fb9968d0f419000d231
-R c696e4c21d675d7ca4562a71667fb0c3
+R d34c486626a8ce5a53145ee9d825c061
-U dan
+U drh
-Z 7455be8358f8e7bf1ced5a136a1693ca
+Z c32d324c29421eb9787794c39572ee17
+-----BEGIN PGP SIGNATURE-----
+Version: GnuPG v1.4.6 (GNU/Linux)
+
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+Khw73UH7YVrOiFFOVF+gTAk=
+=8PSG
+-----END PGP SIGNATURE-----

manifest.uuid

@@ -1 +1 @@
-ecbe0832be77599c7cc66fb9968d0f419000d231
+d7dc8b433691745b3842282569f1573d1e057963

src/main.c

@@ -1448,6 +1448,7 @@ static const int aHardLimit[] = {
   SQLITE_MAX_ATTACHED,
   SQLITE_MAX_LIKE_PATTERN_LENGTH,
   SQLITE_MAX_VARIABLE_NUMBER,
+  SQLITE_MAX_TRIGGER_DEPTH,
 };
 
 /*
@@ -1483,6 +1484,9 @@ static const int aHardLimit[] = {
 #if SQLITE_MAX_COLUMN>32767
 # error SQLITE_MAX_COLUMN must not exceed 32767
 #endif
+#if SQLITE_MAX_TRIGGER_DEPTH<1
+# error SQLITE_MAX_TRIGGER_DEPTH must be at least 1
+#endif
 
 
 /*

src/select.c

@@ -881,7 +881,7 @@ static const char *columnType(
       int iCol = pExpr->iColumn;  /* Index of column in pTab */
       testcase( pExpr->op==TK_AGG_COLUMN );
       testcase( pExpr->op==TK_COLUMN );
-      while( pNC && !pTab ){
+      while( ALWAYS(pNC) && !pTab ){
         SrcList *pTabList = pNC->pSrcList;
         for(j=0;j<pTabList->nSrc && pTabList->a[j].iCursor!=pExpr->iTable;j++);
         if( j<pTabList->nSrc ){
@@ -892,16 +892,12 @@ static const char *columnType(
         }
       }
 
-      if( pTab==0 ){
+      if( NEVER(pTab==0) ){
-        /* FIX ME:
+        /* At one time, code such as "SELECT new.x" within a trigger would
-        ** This can occurs if you have something like "SELECT new.x;" inside
+        ** cause this condition to run.  Since then, we have restructured how
-        ** a trigger.  In other words, if you reference the special "new"
+        ** trigger code is generated and so this condition is no longer 
-        ** table in the result set of a select.  We do not have a good way
+        ** possible.  But it seems prudent to keep the test in place in
-        ** to find the actual table type, so call it "TEXT".  This is really
+        ** case something else changes.
-        ** something of a bug, but I do not know how to fix it.
-        **
-        ** This code does not produce the correct answer - it just prevents
-        ** a segfault.  See ticket #1229.
         */
         zType = "TEXT";
         break;

src/sqlite.h.in

@@ -2317,6 +2317,9 @@ int sqlite3_limit(sqlite3*, int id, int newVal);
 ** <dt>SQLITE_LIMIT_VARIABLE_NUMBER</dt>
 ** <dd>The maximum number of variables in an SQL statement that can
 ** be bound.</dd>
+**
+** <dt>SQLITE_LIMIT_TRIGGER_DEPTH</dt>
+** <dd>The maximum depth of recursion for triggers.</dd>
 ** </dl>
 */
 #define SQLITE_LIMIT_LENGTH                    0
@@ -2329,6 +2332,7 @@ int sqlite3_limit(sqlite3*, int id, int newVal);
 #define SQLITE_LIMIT_ATTACHED                  7
 #define SQLITE_LIMIT_LIKE_PATTERN_LENGTH       8
 #define SQLITE_LIMIT_VARIABLE_NUMBER           9
+#define SQLITE_LIMIT_TRIGGER_DEPTH            10
 
 /*
 ** CAPI3REF: Compiling An SQL Statement {H13010} <S10000>

src/sqliteInt.h

@@ -707,7 +707,7 @@ struct Schema {
 ** The number of different kinds of things that can be limited
 ** using the sqlite3_limit() interface.
 */
-#define SQLITE_N_LIMIT (SQLITE_LIMIT_VARIABLE_NUMBER+1)
+#define SQLITE_N_LIMIT (SQLITE_LIMIT_TRIGGER_DEPTH+1)
 
 /*
 ** Lookaside malloc is a set of fixed-size buffers that can be used

src/sqliteLimit.h

@@ -188,3 +188,10 @@
 #ifndef SQLITE_MAX_LIKE_PATTERN_LENGTH
 # define SQLITE_MAX_LIKE_PATTERN_LENGTH 50000
 #endif
+
+/*
+** Maximum depth of recursion for triggers.
+*/
+#ifndef SQLITE_MAX_TRIGGER_DEPTH
+# define SQLITE_MAX_TRIGGER_DEPTH 1000
+#endif

src/test1.c

@@ -4721,10 +4721,11 @@ static int test_limit(
     { "SQLITE_LIMIT_ATTACHED",            SQLITE_LIMIT_ATTACHED             },
     { "SQLITE_LIMIT_LIKE_PATTERN_LENGTH", SQLITE_LIMIT_LIKE_PATTERN_LENGTH  },
     { "SQLITE_LIMIT_VARIABLE_NUMBER",     SQLITE_LIMIT_VARIABLE_NUMBER      },
+    { "SQLITE_LIMIT_TRIGGER_DEPTH",       SQLITE_LIMIT_TRIGGER_DEPTH        },
     
     /* Out of range test cases */
     { "SQLITE_LIMIT_TOOSMALL",            -1,                               },
-    { "SQLITE_LIMIT_TOOBIG",              SQLITE_LIMIT_VARIABLE_NUMBER+1    },
+    { "SQLITE_LIMIT_TOOBIG",              SQLITE_LIMIT_TRIGGER_DEPTH+1      },
   };
   int i, id;
   int val;

src/vdbe.c

@@ -4802,8 +4802,7 @@ case OP_Program: {        /* jump */
     if( pFrame ) break;
   }
 
-  /* TODO: This constant should be configurable. */
+  if( p->nFrame>db->aLimit[SQLITE_LIMIT_TRIGGER_DEPTH] ){
-  if( p->nFrame>1000 ){
     rc = SQLITE_ERROR;
     sqlite3SetString(&p->zErrMsg, db, "too many levels of trigger recursion");
     break;

test/triggerC.test

@@ -266,6 +266,82 @@ do_test triggerC-3.1.3 {
   execsql { SELECT * FROM t3 }
 } {}
 
+do_test triggerC-3.2.1 {
+  execsql {
+    CREATE TABLE t3b(x);
+    CREATE TRIGGER t3bi AFTER INSERT ON t3b WHEN new.x<2000 BEGIN
+      INSERT INTO t3b VALUES(new.x+1);
+    END;
+  }
+  catchsql {
+    INSERT INTO t3b VALUES(1);
+  }
+} {1 {too many levels of trigger recursion}}
+do_test triggerC-3.2.2 {
+  db eval {SELECT * FROM t3b}
+} {}
+
+do_test triggerC-3.3.1 {
+  catchsql {
+    INSERT INTO t3b VALUES(1000);
+  }
+} {0 {}}
+do_test triggerC-3.3.2 {
+  db eval {SELECT count(*), max(x), min(x) FROM t3b}
+} {1001 2000 1000}
+
+do_test triggerC-3.4.1 {
+  catchsql {
+    DELETE FROM t3b;
+    INSERT INTO t3b VALUES(999);
+  }
+} {1 {too many levels of trigger recursion}}
+do_test triggerC-3.4.2 {
+  db eval {SELECT count(*), max(x), min(x) FROM t3b}
+} {0 {} {}}
+
+do_test triggerC-3.5.1 {
+  sqlite3_limit db SQLITE_LIMIT_TRIGGER_DEPTH 100
+  catchsql {
+    INSERT INTO t3b VALUES(1900);
+  }
+} {0 {}}
+do_test triggerC-3.5.2 {
+  db eval {SELECT count(*), max(x), min(x) FROM t3b}
+} {101 2000 1900}
+
+do_test triggerC-3.5.3 {
+  catchsql {
+    DELETE FROM t3b;
+    INSERT INTO t3b VALUES(1899);
+  }
+} {1 {too many levels of trigger recursion}}
+do_test triggerC-3.5.4 {
+  db eval {SELECT count(*), max(x), min(x) FROM t3b}
+} {0 {} {}}
+
+do_test triggerC-3.6.1 {
+  sqlite3_limit db SQLITE_LIMIT_TRIGGER_DEPTH 1
+  catchsql {
+    INSERT INTO t3b VALUES(1999);
+  }
+} {0 {}}
+do_test triggerC-3.6.2 {
+  db eval {SELECT count(*), max(x), min(x) FROM t3b}
+} {2 2000 1999}
+
+do_test triggerC-3.6.3 {
+  catchsql {
+    DELETE FROM t3b;
+    INSERT INTO t3b VALUES(1998);
+  }
+} {1 {too many levels of trigger recursion}}
+do_test triggerC-3.6.4 {
+  db eval {SELECT count(*), max(x), min(x) FROM t3b}
+} {0 {} {}}
+sqlite3_limit db SQLITE_LIMIT_TRIGGER_DEPTH 1000
+      
+
 #-----------------------------------------------------------------------
 # This next block of tests, triggerC-4.*, checks that affinity 
 # transformations and constraint processing is performed at the correct 
@@ -456,5 +532,3 @@ foreach {n insert log} {
 } 
 
 finish_test
-
-