# Check that the actual data returned by the $select query is the same
  # as the expected data calculated using [te_tbljoin] above.
  #
  te_dataset_eq_unordered e_select-2.2.1.$tn [
    te_read_sql db [string map [list %ss% "($subselect)"] $select]
  ] $te
}




















































finish_test

  # Check that the actual data returned by the $select query is the same
  # as the expected data calculated using [te_tbljoin] above.
  #
  te_dataset_eq_unordered e_select-2.2.1.$tn [
    te_read_sql db [string map [list %ss% "($subselect)"] $select]
  ] $te
}

#-------------------------------------------------------------------------
# The next block of tests - e_select-3.* - concentrate on verifying 
# statements made regarding WHERE clause processing.
#
drop_all_tables
do_execsql_test e_select-3.0 {
  CREATE TABLE x1(k, x, y, z);
  INSERT INTO x1 VALUES(1, 'relinquished', 'aphasia', 78.43);
  INSERT INTO x1 VALUES(2, X'A8E8D66F',    X'07CF',   -81);
  INSERT INTO x1 VALUES(3, -22,            -27.57,    NULL);
  INSERT INTO x1 VALUES(4, NULL,           'bygone',  'picky');
  INSERT INTO x1 VALUES(5, NULL,           96.28,     NULL);
  INSERT INTO x1 VALUES(6, 0,              1,         2);

  CREATE TABLE x2(k, x, y2);
  INSERT INTO x2 VALUES(1, 50, X'B82838');
  INSERT INTO x2 VALUES(5, 84.79, 65.88);
  INSERT INTO x2 VALUES(3, -22, X'0E1BE452A393');
  INSERT INTO x2 VALUES(7, 'mistrusted', 'standardized');
} {}

# EVIDENCE-OF: R-22873-49686 If a WHERE clause is specified, the WHERE
# expression is evaluated for each row in the input data and the result
# cast to a numeric value. All rows for which the WHERE clause
# expression evaluates to a NULL value or to zero (integer value 0 or
# real value 0.0) are excluded from the dataset before continuing.
#
do_execsql_test e_select-3.1.1 { SELECT k FROM x1 WHERE x }         {3}
do_execsql_test e_select-3.1.2 { SELECT k FROM x1 WHERE y }         {3 5 6}
do_execsql_test e_select-3.1.3 { SELECT k FROM x1 WHERE z }         {1 2 6}
do_execsql_test e_select-3.1.4 { SELECT k FROM x1 WHERE '1'||z    } {1 2 4 6}
do_execsql_test e_select-3.1.5 { SELECT k FROM x1 WHERE x IS NULL } {4 5}
do_execsql_test e_select-3.1.6 { SELECT k FROM x1 WHERE z - 78.43 } {2 4 6}

do_execsql_test e_select-3.2.1a {
  SELECT k FROM x1 LEFT JOIN x2 USING(k)
} {1 2 3 4 5 6}
do_execsql_test e_select-3.2.1b {
  SELECT k FROM x1 LEFT JOIN x2 USING(k) WHERE x2.k
} {1 3 5}
do_execsql_test e_select-3.2.2 {
  SELECT k FROM x1 LEFT JOIN x2 USING(k) WHERE x2.k IS NULL
} {2 4 6}

do_execsql_test e_select-3.2.3 {
  SELECT k FROM x1 NATURAL JOIN x2 WHERE x2.k
} {3}
do_execsql_test e_select-3.2.4 {
  SELECT k FROM x1 NATURAL JOIN x2 WHERE x2.k-3
} {}

finish_test