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third_party/sqlite/src/test/subquery.test

Index: third_party/sqlite/src/test/subquery.test
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+# 2005 January 19
+#
+# The author disclaims copyright to this source code.  In place of
+# a legal notice, here is a blessing:
+#
+#    May you do good and not evil.
+#    May you find forgiveness for yourself and forgive others.
+#    May you share freely, never taking more than you give.
+#
+#*************************************************************************
+# This file implements regression tests for SQLite library.  The
+# focus of this script is testing correlated subqueries
+#
+# $Id: subquery.test,v 1.17 2009/01/09 01:12:28 drh Exp $
+#
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+
+ifcapable !subquery {
+  finish_test
+  return
+}
+
+do_test subquery-1.1 {
+  execsql {
+    BEGIN;
+    CREATE TABLE t1(a,b);
+    INSERT INTO t1 VALUES(1,2);
+    INSERT INTO t1 VALUES(3,4);
+    INSERT INTO t1 VALUES(5,6);
+    INSERT INTO t1 VALUES(7,8);
+    CREATE TABLE t2(x,y);
+    INSERT INTO t2 VALUES(1,1);
+    INSERT INTO t2 VALUES(3,9);
+    INSERT INTO t2 VALUES(5,25);
+    INSERT INTO t2 VALUES(7,49);
+    COMMIT;
+  }
+  execsql {
+    SELECT a, (SELECT y FROM t2 WHERE x=a) FROM t1 WHERE b<8
+  }
+} {1 1 3 9 5 25}
+do_test subquery-1.2 {
+  execsql {
+    UPDATE t1 SET b=b+(SELECT y FROM t2 WHERE x=a);
+    SELECT * FROM t1;
+  }
+} {1 3 3 13 5 31 7 57}
+
+do_test subquery-1.3 {
+  execsql {
+    SELECT b FROM t1 WHERE EXISTS(SELECT * FROM t2 WHERE y=a)
+  }
+} {3}
+do_test subquery-1.4 {
+  execsql {
+    SELECT b FROM t1 WHERE NOT EXISTS(SELECT * FROM t2 WHERE y=a)
+  }
+} {13 31 57}
+
+# Simple tests to make sure correlated subqueries in WHERE clauses
+# are used by the query optimizer correctly.
+do_test subquery-1.5 {
+  execsql {
+    SELECT a, x FROM t1, t2 WHERE t1.a = (SELECT x);
+  }
+} {1 1 3 3 5 5 7 7}
+do_test subquery-1.6 {
+  execsql {
+    CREATE INDEX i1 ON t1(a);
+    SELECT a, x FROM t1, t2 WHERE t1.a = (SELECT x);
+  }
+} {1 1 3 3 5 5 7 7}
+do_test subquery-1.7 {
+  execsql {
+    SELECT a, x FROM t2, t1 WHERE t1.a = (SELECT x);
+  }
+} {1 1 3 3 5 5 7 7}
+
+# Try an aggregate in both the subquery and the parent query.
+do_test subquery-1.8 {
+  execsql {
+    SELECT count(*) FROM t1 WHERE a > (SELECT count(*) FROM t2);
+  }
+} {2}
+
+# Test a correlated subquery disables the "only open the index" optimization.
+do_test subquery-1.9.1 {
+  execsql {
+    SELECT (y*2)>b FROM t1, t2 WHERE a=x;
+  }
+} {0 1 1 1}
+do_test subquery-1.9.2 {
+  execsql {
+    SELECT a FROM t1 WHERE (SELECT (y*2)>b FROM t2 WHERE a=x); 
+  }
+} {3 5 7}
+
+# Test that the flattening optimization works with subquery expressions.
+do_test subquery-1.10.1 {
+  execsql {
+    SELECT (SELECT a), b FROM t1;
+  }
+} {1 3 3 13 5 31 7 57}
+do_test subquery-1.10.2 {
+  execsql {
+    SELECT * FROM (SELECT (SELECT a), b FROM t1);
+  }
+} {1 3 3 13 5 31 7 57}
+do_test subquery-1.10.3 {
+  execsql {
+    SELECT * FROM (SELECT (SELECT sum(a) FROM t1));
+  }
+} {16}
+do_test subquery-1.10.4 {
+  execsql {
+    CREATE TABLE t5 (val int, period text PRIMARY KEY);
+    INSERT INTO t5 VALUES(5, '2001-3');
+    INSERT INTO t5 VALUES(10, '2001-4');
+    INSERT INTO t5 VALUES(15, '2002-1');
+    INSERT INTO t5 VALUES(5, '2002-2');
+    INSERT INTO t5 VALUES(10, '2002-3');
+    INSERT INTO t5 VALUES(15, '2002-4');
+    INSERT INTO t5 VALUES(10, '2003-1');
+    INSERT INTO t5 VALUES(5, '2003-2');
+    INSERT INTO t5 VALUES(25, '2003-3');
+    INSERT INTO t5 VALUES(5, '2003-4');
+
+    SELECT period, vsum
+    FROM (SELECT 
+      a.period,
+      (select sum(val) from t5 where period between a.period and '2002-4') vsum
+      FROM t5 a where a.period between '2002-1' and '2002-4')
+    WHERE vsum < 45 ;
+  }
+} {2002-2 30 2002-3 25 2002-4 15}
+do_test subquery-1.10.5 {
+  execsql {
+    SELECT period, vsum from
+      (select a.period,
+      (select sum(val) from t5 where period between a.period and '2002-4') vsum
+    FROM t5 a where a.period between '2002-1' and '2002-4') 
+    WHERE vsum < 45 ;
+  }
+} {2002-2 30 2002-3 25 2002-4 15}
+do_test subquery-1.10.6 {
+  execsql {
+    DROP TABLE t5;
+  }
+} {}
+
+
+
+#------------------------------------------------------------------
+# The following test cases - subquery-2.* - are not logically
+# organized. They're here largely because they were failing during
+# one stage of development of sub-queries.
+#
+do_test subquery-2.1 {
+  execsql {
+    SELECT (SELECT 10);
+  }
+} {10}
+do_test subquery-2.2.1 {
+  execsql {
+    CREATE TABLE t3(a PRIMARY KEY, b);
+    INSERT INTO t3 VALUES(1, 2);
+    INSERT INTO t3 VALUES(3, 1);
+  }
+} {}
+do_test subquery-2.2.2 {
+  execsql {
+    SELECT * FROM t3 WHERE a IN (SELECT b FROM t3);
+  }
+} {1 2}
+do_test subquery-2.2.3 {
+  execsql {
+    DROP TABLE t3;
+  }
+} {}
+do_test subquery-2.3.1 {
+  execsql {
+    CREATE TABLE t3(a TEXT);
+    INSERT INTO t3 VALUES('10');
+  }
+} {}
+do_test subquery-2.3.2 {
+  execsql {
+    SELECT a IN (10.0, 20) FROM t3;
+  }
+} {0}
+do_test subquery-2.3.3 {
+  execsql {
+    DROP TABLE t3;
+  }
+} {}
+do_test subquery-2.4.1 {
+  execsql {
+    CREATE TABLE t3(a TEXT);
+    INSERT INTO t3 VALUES('XX');
+  }
+} {}
+do_test subquery-2.4.2 {
+  execsql {
+    SELECT count(*) FROM t3 WHERE a IN (SELECT 'XX')
+  }
+} {1}
+do_test subquery-2.4.3 {
+  execsql {
+    DROP TABLE t3;
+  }
+} {}
+do_test subquery-2.5.1 {
+  execsql {
+    CREATE TABLE t3(a INTEGER);
+    INSERT INTO t3 VALUES(10);
+
+    CREATE TABLE t4(x TEXT);
+    INSERT INTO t4 VALUES('10.0');
+  }
+} {}
+do_test subquery-2.5.2 {
+  # In the expr "x IN (SELECT a FROM t3)" the RHS of the IN operator
+  # has text affinity and the LHS has integer affinity.  The rule is
+  # that we try to convert both sides to an integer before doing the
+  # comparision.  Hence, the integer value 10 in t3 will compare equal
+  # to the string value '10.0' in t4 because the t4 value will be
+  # converted into an integer.
+  execsql {
+    SELECT * FROM t4 WHERE x IN (SELECT a FROM t3);
+  }
+} {10.0}
+do_test subquery-2.5.3.1 {
+  # The t4i index cannot be used to resolve the "x IN (...)" constraint
+  # because the constraint has integer affinity but t4i has text affinity.
+  execsql {
+    CREATE INDEX t4i ON t4(x);
+    SELECT * FROM t4 WHERE x IN (SELECT a FROM t3);
+  }
+} {10.0}
+do_test subquery-2.5.3.2 {
+  # Verify that the t4i index was not used in the previous query
+  set ::sqlite_query_plan
+} {t4 {}}
+do_test subquery-2.5.4 {
+  execsql {
+    DROP TABLE t3;
+    DROP TABLE t4;
+  }
+} {}
+
+#------------------------------------------------------------------
+# The following test cases - subquery-3.* - test tickets that
+# were raised during development of correlated subqueries.
+#
+
+# Ticket 1083
+ifcapable view {
+  do_test subquery-3.1 {
+    catchsql { DROP TABLE t1; }
+    catchsql { DROP TABLE t2; }
+    execsql {
+      CREATE TABLE t1(a,b);
+      INSERT INTO t1 VALUES(1,2);
+      CREATE VIEW v1 AS SELECT b FROM t1 WHERE a>0;
+      CREATE TABLE t2(p,q);
+      INSERT INTO t2 VALUES(2,9);
+      SELECT * FROM v1 WHERE EXISTS(SELECT * FROM t2 WHERE p=v1.b);
+    }
+  } {2}
+  do_test subquery-3.1.1 {
+    execsql {
+      SELECT * FROM v1 WHERE EXISTS(SELECT 1);
+    }
+  } {2}
+} else {
+  catchsql { DROP TABLE t1; }
+  catchsql { DROP TABLE t2; }
+  execsql {
+    CREATE TABLE t1(a,b);
+    INSERT INTO t1 VALUES(1,2);
+    CREATE TABLE t2(p,q);
+    INSERT INTO t2 VALUES(2,9);
+  }
+}
+
+# Ticket 1084
+do_test subquery-3.2 {
+  catchsql {
+    CREATE TABLE t1(a,b);
+    INSERT INTO t1 VALUES(1,2);
+  }
+  execsql {
+    SELECT (SELECT t1.a) FROM t1;
+  }
+} {1}
+
+# Test Cases subquery-3.3.* test correlated subqueries where the
+# parent query is an aggregate query. Ticket #1105 is an example
+# of such a query.
+#
+do_test subquery-3.3.1 {
+  execsql {
+    SELECT a, (SELECT b) FROM t1 GROUP BY a;
+  }
+} {1 2}
+do_test subquery-3.3.2 {
+  catchsql {DROP TABLE t2}
+  execsql {
+    CREATE TABLE t2(c, d);
+    INSERT INTO t2 VALUES(1, 'one');
+    INSERT INTO t2 VALUES(2, 'two');
+    SELECT a, (SELECT d FROM t2 WHERE a=c) FROM t1 GROUP BY a;
+  }
+} {1 one}
+do_test subquery-3.3.3 {
+  execsql {
+    INSERT INTO t1 VALUES(2, 4);
+    SELECT max(a), (SELECT d FROM t2 WHERE a=c) FROM t1;
+  }
+} {2 two}
+do_test subquery-3.3.4 {
+  execsql {
+    SELECT a, (SELECT (SELECT d FROM t2 WHERE a=c)) FROM t1 GROUP BY a;
+  }
+} {1 one 2 two}
+do_test subquery-3.3.5 {
+  execsql {
+    SELECT a, (SELECT count(*) FROM t2 WHERE a=c) FROM t1;
+  }
+} {1 1 2 1}
+
+#------------------------------------------------------------------
+# These tests - subquery-4.* - use the TCL statement cache to try 
+# and expose bugs to do with re-using statements that have been 
+# passed to sqlite3_reset().
+#
+# One problem was that VDBE memory cells were not being initialised
+# to NULL on the second and subsequent executions.
+#
+do_test subquery-4.1.1 {
+  execsql {
+    SELECT (SELECT a FROM t1);
+  }
+} {1}
+do_test subquery-4.2 {
+  execsql {
+    DELETE FROM t1;
+    SELECT (SELECT a FROM t1);
+  }
+} {{}}
+do_test subquery-4.2.1 {
+  execsql {
+    CREATE TABLE t3(a PRIMARY KEY);
+    INSERT INTO t3 VALUES(10);
+  }
+  execsql {INSERT INTO t3 VALUES((SELECT max(a) FROM t3)+1)}
+} {}
+do_test subquery-4.2.2 {
+  execsql {INSERT INTO t3 VALUES((SELECT max(a) FROM t3)+1)}
+} {}
+
+#------------------------------------------------------------------
+# The subquery-5.* tests make sure string literals in double-quotes
+# are handled efficiently.  Double-quote literals are first checked
+# to see if they match any column names.  If there is not column name
+# match then those literals are used a string constants.  When a
+# double-quoted string appears, we want to make sure that the search
+# for a matching column name did not cause an otherwise static subquery
+# to become a dynamic (correlated) subquery.
+#
+do_test subquery-5.1 {
+  proc callcntproc {n} {
+    incr ::callcnt
+    return $n
+  }
+  set callcnt 0
+  db function callcnt callcntproc
+  execsql {
+    CREATE TABLE t4(x,y);
+    INSERT INTO t4 VALUES('one',1);
+    INSERT INTO t4 VALUES('two',2);
+    INSERT INTO t4 VALUES('three',3);
+    INSERT INTO t4 VALUES('four',4);
+    CREATE TABLE t5(a,b);
+    INSERT INTO t5 VALUES(1,11);
+    INSERT INTO t5 VALUES(2,22);
+    INSERT INTO t5 VALUES(3,33);
+    INSERT INTO t5 VALUES(4,44);
+    SELECT b FROM t5 WHERE a IN 
+       (SELECT callcnt(y)+0 FROM t4 WHERE x="two")
+  }
+} {22}
+do_test subquery-5.2 {
+  # This is the key test.  The subquery should have only run once.  If
+  # The double-quoted identifier "two" were causing the subquery to be
+  # processed as a correlated subquery, then it would have run 4 times.
+  set callcnt
+} {1}
+
+
+# Ticket #1380.  Make sure correlated subqueries on an IN clause work
+# correctly when the left-hand side of the IN operator is constant.
+#
+do_test subquery-6.1 {
+  set callcnt 0
+  execsql {
+    SELECT x FROM t4 WHERE 1 IN (SELECT callcnt(count(*)) FROM t5 WHERE a=y)
+  }
+} {one two three four}
+do_test subquery-6.2 {
+  set callcnt
+} {4}
+do_test subquery-6.3 {
+  set callcnt 0
+  execsql {
+    SELECT x FROM t4 WHERE 1 IN (SELECT callcnt(count(*)) FROM t5 WHERE a=1)
+  }
+} {one two three four}
+do_test subquery-6.4 {
+  set callcnt
+} {1}
+
+if 0 {   #############  disable until we get #2652 fixed
+# Ticket #2652.  Allow aggregate functions of outer queries inside
+# a non-aggregate subquery.
+#
+do_test subquery-7.1 {
+  execsql {
+    CREATE TABLE t7(c7);
+    INSERT INTO t7 VALUES(1);
+    INSERT INTO t7 VALUES(2);
+    INSERT INTO t7 VALUES(3);
+    CREATE TABLE t8(c8);
+    INSERT INTO t8 VALUES(100);
+    INSERT INTO t8 VALUES(200);
+    INSERT INTO t8 VALUES(300);
+    CREATE TABLE t9(c9);
+    INSERT INTO t9 VALUES(10000);
+    INSERT INTO t9 VALUES(20000);
+    INSERT INTO t9 VALUES(30000);
+
+    SELECT (SELECT c7+c8 FROM t7) FROM t8;
+  }
+} {101 201 301}
+do_test subquery-7.2 {
+  execsql {
+    SELECT (SELECT max(c7)+c8 FROM t7) FROM t8;
+  }
+} {103 203 303}
+do_test subquery-7.3 {
+  execsql {
+    SELECT (SELECT c7+max(c8) FROM t8) FROM t7
+  }
+} {301}
+do_test subquery-7.4 {
+  execsql {
+    SELECT (SELECT max(c7)+max(c8) FROM t8) FROM t7
+  }
+} {303}
+do_test subquery-7.5 {
+  execsql {
+    SELECT (SELECT c8 FROM t8 WHERE rowid=max(c7)) FROM t7
+  }
+} {300}
+do_test subquery-7.6 {
+  execsql {
+    SELECT (SELECT (SELECT max(c7+c8+c9) FROM t9) FROM t8) FROM t7
+  }
+} {30101 30102 30103}
+do_test subquery-7.7 {
+  execsql {
+    SELECT (SELECT (SELECT c7+max(c8+c9) FROM t9) FROM t8) FROM t7
+  }
+} {30101 30102 30103}
+do_test subquery-7.8 {
+  execsql {
+    SELECT (SELECT (SELECT max(c7)+c8+c9 FROM t9) FROM t8) FROM t7
+  }
+} {10103}
+do_test subquery-7.9 {
+  execsql {
+    SELECT (SELECT (SELECT c7+max(c8)+c9 FROM t9) FROM t8) FROM t7
+  }
+} {10301 10302 10303}
+do_test subquery-7.10 {
+  execsql {
+    SELECT (SELECT (SELECT c7+c8+max(c9) FROM t9) FROM t8) FROM t7
+  }
+} {30101 30102 30103}
+do_test subquery-7.11 {
+  execsql {
+    SELECT (SELECT (SELECT max(c7)+max(c8)+max(c9) FROM t9) FROM t8) FROM t7
+  }
+} {30303}
+}  ;############# Disabled
+
+finish_test