From: danielk1977 <danielk1977@noemail.net>
Date: Thu, 15 May 2008 17:48:20 +0000 (+0000)
Subject: Add the "page_count" pragma. Returns a single integer - the number of pages in the... 
X-Git-Tag: version-3.6.10~1042
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=59a93791cedbc627d11148cf314603b21ad9ef0e;p=thirdparty%2Fsqlite.git

Add the "page_count" pragma. Returns a single integer - the number of pages in the specified database file. (CVS 5135)

FossilOrigin-Name: eb6985e69ce2a5e5e7361f6226d1cfc547fd441d
---

diff --git a/manifest b/manifest
index f7a9861c13..51bcf0d68e 100644
--- a/manifest
+++ b/manifest
@@ -1,5 +1,5 @@
-C If\sa\spager\sis\salready\sin\sthe\serror-state\swhen\sCommitPhaseOne()\sis\scalled,\sexit\searly.\s(CVS\s5134)
-D 2008-05-15T11:08:08
+C Add\sthe\s"page_count"\spragma.\sReturns\sa\ssingle\sinteger\s-\sthe\snumber\sof\spages\sin\sthe\sspecified\sdatabase\sfile.\s(CVS\s5135)
+D 2008-05-15T17:48:20
 F Makefile.arm-wince-mingw32ce-gcc ac5f7b2cef0cd850d6f755ba6ee4ab961b1fadf7
 F Makefile.in 79aeba12300a54903f1b1257c1e7c190234045dd
 F Makefile.linux-gcc d53183f4aa6a9192d249731c90dbdffbd2c68654
@@ -124,7 +124,7 @@ F src/os_win.c 3a60bddd07ea6f8adb2314dd5996ac97b988f403
 F src/pager.c 43f5f67ff211ed0f40ccd9a96c079e811a9ac601
 F src/pager.h 4f051fd856de6fd3c19aef5f82eace54122b9173
 F src/parse.y fc4bd35c6088901f7c8daead26c6fb11c87d22e7
-F src/pragma.c 2e4bb2e76e48a32750529fdc4bfe86ac5f54e01b
+F src/pragma.c a4919a29a0923e00c6170b0677a50058e352b58c
 F src/prepare.c adc7e1fc08dfbab63cd213d4c0aff8f3fa70d477
 F src/printf.c 77c192ccc81117d68b21b449cd33396357aa266d
 F src/random.c 2b2db2de4ab491f5a14d3480466f8f4b5a5db74a
@@ -167,7 +167,7 @@ F src/update.c 2d7143b9014e955509cc4f323f9a9584fb898f34
 F src/utf.c 8c94fa10efc78c2568d08d436acc59df4df7191b
 F src/util.c 28fb90e03f83b95f6e8b1978fb60953e6cef9e3a
 F src/vacuum.c c3b2b70677f874102b8753bf494c232e777f3998
-F src/vdbe.c 81035a619a605412a782c1f01ffeb924e08759da
+F src/vdbe.c 25a362a4fdd5ff2797db0e20a9cf4300e053891e
 F src/vdbe.h f4bb70962d9c13e0f65b215c90e8acea1ae6e8ee
 F src/vdbeInt.h 18aebaa7857de4507d92ced62d8fe0844671a681
 F src/vdbeapi.c 95ed14a59c509f98c64afba30cd18c3c8cf649cd
@@ -409,7 +409,7 @@ F test/pager2.test c025f91b75fe65e85febda64d9416428b8a5cab5
 F test/pager3.test 2323bf27fd5bd887b580247e5bce500ceee994b4
 F test/pageropt.test 6df72c441db0a037b7ec6990d16311c24fbea77b
 F test/pagesize.test e0a8b3fe80f8b8e808d94a00734c7a18c76c407e
-F test/pragma.test aec802c9599db3ec887b5fd96f0b08958129303e
+F test/pragma.test c3229f5f66a00807fa1d3cb8fd07d87c28c93e3e
 F test/pragma2.test 5364893491b9231dd170e3459bfc2e2342658b47
 F test/printf.test c3405535b418d454e8a52196a0fc592ec9eec58d
 F test/progress.test 5b075c3c790c7b2a61419bc199db87aaf48b8301 x
@@ -635,7 +635,7 @@ F www/tclsqlite.tcl 8be95ee6dba05eabcd27a9d91331c803f2ce2130
 F www/vdbe.tcl 87a31ace769f20d3627a64fa1fade7fed47b90d0
 F www/version3.tcl 890248cf7b70e60c383b0e84d77d5132b3ead42b
 F www/whentouse.tcl fc46eae081251c3c181bd79c5faef8195d7991a5
-P 47652e7b169626e5f3d95f29e867a2e8f68c5025
-R d8f7609758174cb331cdc46a0cb952a9
+P 443cf1056c73ae89d0efcc7a462455c078b3a4a8
+R 96e9041aae6fa8722c29c429bd779ba8
 U danielk1977
-Z 7ea980f7a54707b1517ab40c9892ab63
+Z 5b148c1b18a27ad32a8908d4eed930da
diff --git a/manifest.uuid b/manifest.uuid
index f01d8b857c..3bbf611740 100644
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-443cf1056c73ae89d0efcc7a462455c078b3a4a8
\ No newline at end of file
+eb6985e69ce2a5e5e7361f6226d1cfc547fd441d
\ No newline at end of file
diff --git a/src/pragma.c b/src/pragma.c
index 661af7a101..9a28563e3f 100644
--- a/src/pragma.c
+++ b/src/pragma.c
@@ -11,7 +11,7 @@
 *************************************************************************
 ** This file contains code used to implement the PRAGMA command.
 **
-** $Id: pragma.c,v 1.176 2008/04/17 20:59:38 drh Exp $
+** $Id: pragma.c,v 1.177 2008/05/15 17:48:20 danielk1977 Exp $
 */
 #include "sqliteInt.h"
 #include <ctype.h>
@@ -378,6 +378,24 @@ void sqlite3Pragma(
     returnSingleInt(pParse, "max_page_count", newMax);
   }else
 
+  /*
+  **  PRAGMA [database.]page_count
+  **
+  ** Return the number of pages in the specified database.
+  */
+  if( sqlite3StrICmp(zLeft,"page_count")==0 ){
+    Vdbe *v;
+    int iReg;
+    v = sqlite3GetVdbe(pParse);
+    if( !v || sqlite3ReadSchema(pParse) ) goto pragma_out;
+    sqlite3CodeVerifySchema(pParse, iDb);
+    iReg = ++pParse->nMem;
+    sqlite3VdbeAddOp2(v, OP_Pagecount, iDb, iReg);
+    sqlite3VdbeAddOp2(v, OP_ResultRow, iReg, 1);
+    sqlite3VdbeSetNumCols(v, 1);
+    sqlite3VdbeSetColName(v, 0, COLNAME_NAME, "page_count", P4_STATIC);
+  }else
+
   /*
   **  PRAGMA [database.]locking_mode
   **  PRAGMA [database.]locking_mode = (normal|exclusive)
diff --git a/src/vdbe.c b/src/vdbe.c
index 8215a703f4..56be3b6ab1 100644
--- a/src/vdbe.c
+++ b/src/vdbe.c
@@ -43,7 +43,7 @@
 ** in this file for details.  If in doubt, do not deviate from existing
 ** commenting and indentation practices when changing or adding code.
 **
-** $Id: vdbe.c,v 1.740 2008/05/13 13:27:34 drh Exp $
+** $Id: vdbe.c,v 1.741 2008/05/15 17:48:20 danielk1977 Exp $
 */
 #include "sqliteInt.h"
 #include <ctype.h>
@@ -4808,6 +4808,27 @@ case OP_VUpdate: {
 }
 #endif /* SQLITE_OMIT_VIRTUALTABLE */
 
+#ifndef  SQLITE_OMIT_PAGER_PRAGMAS
+/* Opcode: Pagecount P1 P2 * * *
+**
+** Write the current number of pages in database P1 to memory cell P2.
+*/
+case OP_Pagecount: {            /* out2-prerelease */
+  int p1 = pOp->p1; 
+  int nPage;
+  Pager *pPager = sqlite3BtreePager(db->aDb[p1].pBt);
+
+  nPage = sqlite3PagerPagecount(pPager);
+  if( nPage<0 ){
+    rc = SQLITE_IOERR;
+  }else{
+    pOut->flags = MEM_Int;
+    pOut->u.i = nPage;
+  }
+  break;
+}
+#endif
+
 #ifndef SQLITE_OMIT_TRACE
 /* Opcode: Trace * * * P4 *
 **
diff --git a/test/pragma.test b/test/pragma.test
index f577f015aa..330139c524 100644
--- a/test/pragma.test
+++ b/test/pragma.test
@@ -12,7 +12,7 @@
 #
 # This file implements tests for the PRAGMA command.
 #
-# $Id: pragma.test,v 1.59 2008/03/19 00:21:31 drh Exp $
+# $Id: pragma.test,v 1.60 2008/05/15 17:48:20 danielk1977 Exp $
 
 set testdir [file dirname $argv0]
 source $testdir/tester.tcl
@@ -31,6 +31,7 @@ source $testdir/tester.tcl
 # pragma-9.*: Test temp_store and temp_store_directory.
 # pragma-10.*: Test the count_changes pragma in the presence of triggers.
 # pragma-11.*: Test the collation_list pragma.
+# pragma-14.*: Test the page_count pragma.
 #
 
 ifcapable !pragma {
@@ -1095,6 +1096,61 @@ do_test pragma-13.1 {
 
 } ;# ifcapable bloblit 
 
+ifcapable pager_pragmas {
+  db close
+  file delete -force test.db
+  sqlite3 db test.db
+
+  do_test pragma-14.1 {
+    execsql { pragma auto_vacuum = 0 }
+    execsql { pragma page_count }
+  } {0}
+
+  do_test pragma-14.2 {
+    execsql { 
+      CREATE TABLE abc(a, b, c);
+      PRAGMA page_count;
+    }
+  } {2}
+
+  do_test pragma-14.3 {
+    execsql { 
+      BEGIN;
+      CREATE TABLE def(a, b, c);
+      PRAGMA page_count;
+    }
+  } {3}
+
+  do_test pragma-14.4 {
+    set page_size [db one {pragma page_size}]
+    expr [file size test.db] / $page_size
+  } {2}
+
+  do_test pragma-14.5 {
+    execsql {
+      ROLLBACK;
+      PRAGMA page_count;
+    }
+  } {2}
+
+  do_test pragma-14.6 {
+    file delete -force test2.db
+    sqlite3 db2 test2.db
+    execsql {
+      PRAGMA auto_vacuum = 0;
+      CREATE TABLE t1(a, b, c);
+      CREATE TABLE t2(a, b, c);
+      CREATE TABLE t3(a, b, c);
+      CREATE TABLE t4(a, b, c);
+    } db2
+    db2 close
+    execsql {
+      ATTACH 'test2.db' AS aux;
+      PRAGMA aux.page_count;
+    } 
+  } {5}
+}
+
 # Reset the sqlite3_temp_directory variable for the next run of tests:
 sqlite3 dbX :memory:
 dbX eval {PRAGMA temp_store_directory = ""}