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Overview
Comment:Expire prepared statements after running ANALYZE.
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SHA1: b083a961f8ac3a6158e822574d73cd63e3103b09
User & Date: drh 2014-07-22 14:42:16.806
Context
2014-07-22
14:58
Enhance the sqlite_stat1.stat parsing to allow additional text parameters at the end. Unrecognized parameters are silently ignored. (check-in: ca2a5a2c77 user: drh tags: trunk)
14:42
Expire prepared statements after running ANALYZE. (check-in: b083a961f8 user: drh tags: trunk)
12:05
Enhance the comment on whereLoopAddBtree(). No changes to code. (check-in: b22dd165da user: drh tags: trunk)
Changes
Unified Diff Ignore Whitespace Patch
Changes to src/analyze.c.
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  sqlite3 *db = pParse->db;
  int iDb;
  int i;
  char *z, *zDb;
  Table *pTab;
  Index *pIdx;
  Token *pTableName;


  /* Read the database schema. If an error occurs, leave an error message
  ** and code in pParse and return NULL. */
  assert( sqlite3BtreeHoldsAllMutexes(pParse->db) );
  if( SQLITE_OK!=sqlite3ReadSchema(pParse) ){
    return;
  }







>







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  sqlite3 *db = pParse->db;
  int iDb;
  int i;
  char *z, *zDb;
  Table *pTab;
  Index *pIdx;
  Token *pTableName;
  Vdbe *v;

  /* Read the database schema. If an error occurs, leave an error message
  ** and code in pParse and return NULL. */
  assert( sqlite3BtreeHoldsAllMutexes(pParse->db) );
  if( SQLITE_OK!=sqlite3ReadSchema(pParse) ){
    return;
  }
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        }else if( (pTab = sqlite3LocateTable(pParse, 0, z, zDb))!=0 ){
          analyzeTable(pParse, pTab, 0);
        }
        sqlite3DbFree(db, z);
      }
    }   
  }


}

/*
** Used to pass information from the analyzer reader through to the
** callback routine.
*/
typedef struct analysisInfo analysisInfo;







>
>







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        }else if( (pTab = sqlite3LocateTable(pParse, 0, z, zDb))!=0 ){
          analyzeTable(pParse, pTab, 0);
        }
        sqlite3DbFree(db, z);
      }
    }   
  }
  v = sqlite3GetVdbe(pParse);
  if( v ) sqlite3VdbeAddOp0(v, OP_Expire);
}

/*
** Used to pass information from the analyzer reader through to the
** callback routine.
*/
typedef struct analysisInfo analysisInfo;
Changes to src/where.c.
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          if( (eOp & (WO_EQ|WO_ISNULL))!=0 ){
            testcase( eOp & WO_EQ );
            testcase( eOp & WO_ISNULL );
            rc = whereEqualScanEst(pParse, pBuilder, pExpr->pRight, &nOut);
          }else{
            rc = whereInScanEst(pParse, pBuilder, pExpr->x.pList, &nOut);
          }
          assert( rc!=SQLITE_OK || nOut>0 );
          if( rc==SQLITE_NOTFOUND ) rc = SQLITE_OK;
          if( rc!=SQLITE_OK ) break;          /* Jump out of the pTerm loop */
          if( nOut ){
            pNew->nOut = sqlite3LogEst(nOut);
            if( pNew->nOut>saved_nOut ) pNew->nOut = saved_nOut;
            pNew->nOut -= nIn;
          }







<







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          if( (eOp & (WO_EQ|WO_ISNULL))!=0 ){
            testcase( eOp & WO_EQ );
            testcase( eOp & WO_ISNULL );
            rc = whereEqualScanEst(pParse, pBuilder, pExpr->pRight, &nOut);
          }else{
            rc = whereInScanEst(pParse, pBuilder, pExpr->x.pList, &nOut);
          }

          if( rc==SQLITE_NOTFOUND ) rc = SQLITE_OK;
          if( rc!=SQLITE_OK ) break;          /* Jump out of the pTerm loop */
          if( nOut ){
            pNew->nOut = sqlite3LogEst(nOut);
            if( pNew->nOut>saved_nOut ) pNew->nOut = saved_nOut;
            pNew->nOut -= nIn;
          }
Changes to test/analyze6.test.
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  eqp {SELECT * FROM t201 WHERE y=5}
} {0 0 0 {SEARCH TABLE t201 USING INDEX sqlite_autoindex_t201_1 (y=?)}}
do_test analyze6-2.3 {
  eqp {SELECT * FROM t201 WHERE x=5}
} {0 0 0 {SEARCH TABLE t201 USING INTEGER PRIMARY KEY (rowid=?)}}
do_test analyze6-2.4 {
  execsql {
    INSERT INTO t201 VALUES(1,2,3);
    ANALYZE t201;
  }
  eqp {SELECT * FROM t201 WHERE z=5}
} {0 0 0 {SEARCH TABLE t201 USING INDEX t201z (z=?)}}
do_test analyze6-2.5 {
  eqp {SELECT * FROM t201 WHERE y=5}
} {0 0 0 {SEARCH TABLE t201 USING INDEX sqlite_autoindex_t201_1 (y=?)}}







|







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  eqp {SELECT * FROM t201 WHERE y=5}
} {0 0 0 {SEARCH TABLE t201 USING INDEX sqlite_autoindex_t201_1 (y=?)}}
do_test analyze6-2.3 {
  eqp {SELECT * FROM t201 WHERE x=5}
} {0 0 0 {SEARCH TABLE t201 USING INTEGER PRIMARY KEY (rowid=?)}}
do_test analyze6-2.4 {
  execsql {
    INSERT INTO t201 VALUES(1,2,3),(2,3,4),(3,4,5);
    ANALYZE t201;
  }
  eqp {SELECT * FROM t201 WHERE z=5}
} {0 0 0 {SEARCH TABLE t201 USING INDEX t201z (z=?)}}
do_test analyze6-2.5 {
  eqp {SELECT * FROM t201 WHERE y=5}
} {0 0 0 {SEARCH TABLE t201 USING INDEX sqlite_autoindex_t201_1 (y=?)}}