zAff = sqlite3DbStrDup(pParse->db, sqlite3IndexAffinityStr(v, pIdx));
  if( !zAff ){
    pParse->db->mallocFailed = 1;
  }

  /* Evaluate the equality constraints
  */
  assert( pIdx->nColumn>=nEq );
  for(j=0; j<nEq; j++){
    int r1;
    pTerm = pLoop->aLTerm[j];
    assert( pTerm!=0 );
    /* The following true for indices with redundant columns. 
    ** Ex: CREATE INDEX i1 ON t1(a,b,a); SELECT * FROM t1 WHERE a=0 AND b=0; */
    testcase( (pTerm->wtFlags & TERM_CODED)!=0 );
................................................................................
  if( nEq==0 && (pLoop->wsFlags & (WHERE_BTM_LIMIT|WHERE_TOP_LIMIT))==0 ){
    return 0;
  }
  sqlite3StrAccumInit(&txt, 0, 0, SQLITE_MAX_LENGTH);
  txt.db = db;
  sqlite3StrAccumAppend(&txt, " (", 2);
  for(i=0; i<nEq; i++){

    explainAppendTerm(&txt, i, aCol[aiColumn[i]].zName, "=");
  }

  j = i;
  if( pLoop->wsFlags&WHERE_BTM_LIMIT ){
    char *z = (j==pIndex->nColumn ) ? "rowid" : aCol[aiColumn[j]].zName;
    explainAppendTerm(&txt, i++, z, ">");
  }

  zAff = sqlite3DbStrDup(pParse->db, sqlite3IndexAffinityStr(v, pIdx));
  if( !zAff ){
    pParse->db->mallocFailed = 1;
  }

  /* Evaluate the equality constraints
  */
  assert( zAff==0 || strlen(zAff)>=nEq );
  for(j=0; j<nEq; j++){
    int r1;
    pTerm = pLoop->aLTerm[j];
    assert( pTerm!=0 );
    /* The following true for indices with redundant columns. 
    ** Ex: CREATE INDEX i1 ON t1(a,b,a); SELECT * FROM t1 WHERE a=0 AND b=0; */
    testcase( (pTerm->wtFlags & TERM_CODED)!=0 );
................................................................................
  if( nEq==0 && (pLoop->wsFlags & (WHERE_BTM_LIMIT|WHERE_TOP_LIMIT))==0 ){
    return 0;
  }
  sqlite3StrAccumInit(&txt, 0, 0, SQLITE_MAX_LENGTH);
  txt.db = db;
  sqlite3StrAccumAppend(&txt, " (", 2);
  for(i=0; i<nEq; i++){
    char *z = (i==pIndex->nColumn ) ? "rowid" : aCol[aiColumn[i]].zName;
    explainAppendTerm(&txt, i, z, "=");
  }

  j = i;
  if( pLoop->wsFlags&WHERE_BTM_LIMIT ){
    char *z = (j==pIndex->nColumn ) ? "rowid" : aCol[aiColumn[j]].zName;
    explainAppendTerm(&txt, i++, z, ">");
  }

#
#***********************************************************************
#
# $Id: indexedby.test,v 1.5 2009/03/22 20:36:19 drh Exp $

set testdir [file dirname $argv0]
source $testdir/tester.tcl


# Create a schema with some indexes.
#
do_test indexedby-1.1 {
  execsql {
    CREATE TABLE t1(a, b);
    CREATE INDEX i1 ON t1(a);
................................................................................
    CREATE TABLE t10(indexed INTEGER);
    INSERT INTO t10 VALUES(1);
    CREATE INDEX indexed ON t10(indexed);
    SELECT * FROM t10 indexed by indexed WHERE indexed>0
  }
} {1}















































finish_test

#
#***********************************************************************
#
# $Id: indexedby.test,v 1.5 2009/03/22 20:36:19 drh Exp $

set testdir [file dirname $argv0]
source $testdir/tester.tcl
set ::testprefix indexedby

# Create a schema with some indexes.
#
do_test indexedby-1.1 {
  execsql {
    CREATE TABLE t1(a, b);
    CREATE INDEX i1 ON t1(a);
................................................................................
    CREATE TABLE t10(indexed INTEGER);
    INSERT INTO t10 VALUES(1);
    CREATE INDEX indexed ON t10(indexed);
    SELECT * FROM t10 indexed by indexed WHERE indexed>0
  }
} {1}

#-------------------------------------------------------------------------
# Ensure that the rowid at the end of each index entry may be used
# for equality constraints in the same way as other indexed fields.
#
do_execsql_test 11.1 {
  CREATE TABLE x1(a, b TEXT);
  CREATE INDEX x1i ON x1(a, b);
  INSERT INTO x1 VALUES(1, 1);
  INSERT INTO x1 VALUES(1, 1);
  INSERT INTO x1 VALUES(1, 1);
  INSERT INTO x1 VALUES(1, 1);
}
do_execsql_test 11.2 {
  SELECT a,b,rowid FROM x1 INDEXED BY x1i WHERE a=1 AND b=1 AND rowid=3;
} {1 1 3}
do_execsql_test 11.3 {
  SELECT a,b,rowid FROM x1 INDEXED BY x1i WHERE a=1 AND b=1 AND rowid='3';
} {1 1 3}
do_execsql_test 11.4 {
  SELECT a,b,rowid FROM x1 INDEXED BY x1i WHERE a=1 AND b=1 AND rowid='3.0';
} {1 1 3}
do_eqp_test 11.5 {
  SELECT a,b,rowid FROM x1 INDEXED BY x1i WHERE a=1 AND b=1 AND rowid='3.0';
} {0 0 0 {SEARCH TABLE x1 USING COVERING INDEX x1i (a=? AND b=? AND rowid=?)}}

do_execsql_test 11.6 {
  CREATE TABLE x2(c INTEGER PRIMARY KEY, a, b TEXT);
  CREATE INDEX x2i ON x2(a, b);
  INSERT INTO x2 VALUES(1, 1, 1);
  INSERT INTO x2 VALUES(2, 1, 1);
  INSERT INTO x2 VALUES(3, 1, 1);
  INSERT INTO x2 VALUES(4, 1, 1);
}
do_execsql_test 11.7 {
  SELECT a,b,c FROM x2 INDEXED BY x2i WHERE a=1 AND b=1 AND c=3;
} {1 1 3}
do_execsql_test 11.8 {
  SELECT a,b,c FROM x2 INDEXED BY x2i WHERE a=1 AND b=1 AND c='3';
} {1 1 3}
do_execsql_test 11.9 {
  SELECT a,b,c FROM x2 INDEXED BY x2i WHERE a=1 AND b=1 AND c='3.0';
} {1 1 3}
do_eqp_test 11.10 {
  SELECT a,b,c FROM x2 INDEXED BY x2i WHERE a=1 AND b=1 AND c='3.0';
} {0 0 0 {SEARCH TABLE x2 USING COVERING INDEX x2i (a=? AND b=? AND rowid=?)}}

finish_test