3 # The author disclaims copyright to this source code. In place of
4 # a legal notice, here is a blessing:
6 # May you do good and not evil.
7 # May you find forgiveness for yourself and forgive others.
8 # May you share freely, never taking more than you give.
10 #***********************************************************************
11 # This file implements regression tests for SQLite library.
13 # This file is devoted to testing the sqlite3_next_stmt and
14 # sqlite3_stmt_readonly and sqlite3_stmt_busy interfaces.
16 # $Id: capi3d.test,v 1.2 2008/07/14 15:11:20 drh Exp $
19 set testdir [file dirname $argv0]
20 source $testdir/tester.tcl
22 # Create N prepared statements against database connection db
23 # and return a list of all the generated prepared statements.
25 proc make_prepared_statements {N} {
27 for {set i 0} {$i<$N} {incr i} {
28 set sql "SELECT $i FROM sqlite_master WHERE name LIKE '%$i%'"
30 set s [sqlite3_prepare_v2 db $sql -1 notused]
34 set sql [encoding convertto unicode $sql]\x00\x00
35 set s [sqlite3_prepare16 db $sql -1 notused]
37 set s [sqlite3_prepare db $sql -1 notused]
41 set s [sqlite3_prepare db $sql -1 notused]
50 # Scramble the $inlist into a random order.
52 proc scramble {inlist} {
55 lappend y [list [expr {rand()}] $x]
60 lappend outlist [lindex $x 1]
65 # Database initially has no prepared statements.
69 sqlite3_next_stmt db 0
72 # Run the following tests for between 1 and 100 prepared statements.
74 for {set i 1} {$i<=100} {incr i} {
75 set stmtlist [make_prepared_statements $i]
76 do_test capi3d-1.2.$i.1 {
77 set p [sqlite3_next_stmt db 0]
81 set p [sqlite3_next_stmt db $p]
85 do_test capi3-1.2.$i.2 {
86 foreach p [scramble $::stmtlist] {
89 sqlite3_next_stmt db 0
93 # Tests for the is-read-only interface.
95 proc test_is_readonly {testname sql truth} {
96 do_test $testname [format {
97 set DB [sqlite3_connection_pointer db]
98 set STMT [sqlite3_prepare $DB {%s} -1 TAIL]
99 set rc [sqlite3_stmt_readonly $STMT]
100 sqlite3_finalize $STMT
104 # EVIDENCE-OF: R-61212-30018 If prepared statement X is an EXPLAIN or
105 # EXPLAIN QUERY PLAN statement, then sqlite3_stmt_readonly(X) returns
106 # the same value as if the EXPLAIN or EXPLAIN QUERY PLAN prefix were
109 do_test $testname.explain [format {
110 set DB [sqlite3_connection_pointer db]
111 set STMT [sqlite3_prepare $DB {EXPLAIN %s} -1 TAIL]
112 set rc [sqlite3_stmt_readonly $STMT]
113 sqlite3_finalize $STMT
116 do_test $testname.eqp [format {
117 set DB [sqlite3_connection_pointer db]
118 set STMT [sqlite3_prepare $DB {EXPLAIN QUERY PLAN %s} -1 TAIL]
119 set rc [sqlite3_stmt_readonly $STMT]
120 sqlite3_finalize $STMT
125 # EVIDENCE-OF: R-23332-64992 The sqlite3_stmt_readonly(X) interface
126 # returns true (non-zero) if and only if the prepared statement X makes
127 # no direct changes to the content of the database file.
129 test_is_readonly capi3d-2.1 {SELECT * FROM sqlite_master} 1
130 test_is_readonly capi3d-2.2 {CREATE TABLE t1(x)} 0
131 db eval {CREATE TABLE t1(x)}
132 test_is_readonly capi3d-2.3 {INSERT INTO t1 VALUES(5)} 0
133 test_is_readonly capi3d-2.4 {UPDATE t1 SET x=x+1 WHERE x<0} 0
134 test_is_readonly capi3d-2.5 {SELECT * FROM t1} 1
136 test_is_readonly capi3d-2.6 {PRAGMA journal_mode=WAL} 0
137 test_is_readonly capi3d-2.7 {PRAGMA wal_checkpoint} 0
139 test_is_readonly capi3d-2.8 {PRAGMA application_id=1234} 0
140 test_is_readonly capi3d-2.9 {VACUUM} 0
141 test_is_readonly capi3d-2.10 {PRAGMA integrity_check} 1
143 sqlite3_stmt_readonly 0
147 # EVIDENCE-OF: R-04929-09147 This routine returns false if there is any
148 # possibility that the statement might change the database file.
150 # EVIDENCE-OF: R-13288-53765 A false return does not guarantee that the
151 # statement will change the database file.
153 # EVIDENCE-OF: R-22182-18548 For example, an UPDATE statement might have
154 # a WHERE clause that makes it a no-op, but the sqlite3_stmt_readonly()
155 # result would still be false.
157 # EVIDENCE-OF: R-50998-48593 Similarly, a CREATE TABLE IF NOT EXISTS
158 # statement is a read-only no-op if the table already exists, but
159 # sqlite3_stmt_readonly() still returns false for such a statement.
162 CREATE TABLE t2(a,b,c);
163 INSERT INTO t2 VALUES(1,2,3);
165 test_is_readonly capi3d-2.11 {UPDATE t2 SET a=a+1 WHERE false} 0
166 test_is_readonly capi3d-2.12 {CREATE TABLE IF NOT EXISTS t2(x,y)} 0
169 # EVIDENCE-OF: R-37014-01401 The ATTACH and DETACH statements also cause
170 # sqlite3_stmt_readonly() to return true since, while those statements
171 # change the configuration of a database connection, they do not make
172 # changes to the content of the database files on disk.
174 test_is_readonly capi3d-2.13 {ATTACH ':memory:' AS mem1} 1
175 db eval {ATTACH ':memory:' AS mem1}
176 test_is_readonly capi3d-2.14 {DETACH mem1} 1
177 db eval {DETACH mem1}
179 # EVIDENCE-OF: R-07474-04783 Transaction control statements such as
180 # BEGIN, COMMIT, ROLLBACK, SAVEPOINT, and RELEASE cause
181 # sqlite3_stmt_readonly() to return true, since the statements
182 # themselves do not actually modify the database but rather they control
183 # the timing of when other statements modify the database.
185 test_is_readonly capi3d-2.15 {BEGIN} 1
186 test_is_readonly capi3d-2.16 {COMMIT} 1
187 test_is_readonly capi3d-2.17 {SAVEPOINT one} 1
188 test_is_readonly capi3d-2.18 {RELEASE one} 1
190 # EVIDENCE-OF: R-36961-63052 The sqlite3_stmt_readonly() interface
191 # returns true for BEGIN since BEGIN merely sets internal flags, but the
192 # BEGIN IMMEDIATE and BEGIN EXCLUSIVE commands do touch the database and
193 # so sqlite3_stmt_readonly() returns false for those commands.
195 test_is_readonly capi3d-2.19 {BEGIN IMMEDIATE} 0
196 test_is_readonly capi3d-2.20 {BEGIN EXCLUSIVE} 0
198 # EVIDENCE-OF: R-21769-42523 For example, if an application defines a
199 # function "eval()" that calls sqlite3_exec(), then the following SQL
200 # statement would change the database file through side-effects: SELECT
201 # eval('DELETE FROM t1') FROM t2; But because the SELECT statement does
202 # not change the database file directly, sqlite3_stmt_readonly() would
205 proc evalsql {sql} {db eval $sql}
207 test_is_readonly capi3d-2.21 {SELECT eval('DELETE FROM t1') FROM t2} 1
209 # Tests for the is-explain interface.
211 proc test_is_explain {testname sql truth} {
212 do_test $testname [format {
213 set DB [sqlite3_connection_pointer db]
214 set STMT [sqlite3_prepare $DB {%s} -1 TAIL]
215 set rc [sqlite3_stmt_isexplain $STMT]
216 sqlite3_finalize $STMT
221 test_is_explain capi3d-2.51 {SELECT * FROM sqlite_master} 0
222 test_is_explain capi3d-2.52 { explain SELECT * FROM sqlite_master} 1
223 test_is_explain capi3d-2.53 { Explain Query Plan select * FROM sqlite_master} 2
225 sqlite3_stmt_isexplain 0
228 # Tests for sqlite3_stmt_busy
231 db eval {INSERT INTO t1 VALUES(6); INSERT INTO t1 VALUES(7);}
232 set STMT [sqlite3_prepare db {SELECT * FROM t1} -1 TAIL]
233 sqlite3_stmt_busy $STMT
237 sqlite3_stmt_busy $STMT
241 sqlite3_stmt_busy $STMT
245 sqlite3_stmt_busy $STMT
248 do_test capi3d-3.99 {
249 sqlite3_finalize $STMT
253 #--------------------------------------------------------------------------
254 # Test the sqlite3_stmt_busy() function with ROLLBACK statements.
258 do_execsql_test capi3d-4.1 {
259 CREATE TABLE t4(x,y);
263 do_test capi3d-4.2.1 {
264 set ::s1 [sqlite3_prepare_v2 db "ROLLBACK" -1 notused]
268 do_test capi3d-4.2.2 {
269 sqlite3_stmt_busy $::s1
272 do_catchsql_test capi3d-4.2.3 {
276 do_test capi3d-4.2.4 {
280 do_catchsql_test capi3d-4.2.5 {
284 do_test capi3d-4.2.6 {
285 sqlite3_finalize $::s1