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test/parser1.test
125 строк4 KB
drh
When attempting to optimize "expr AND false" to "false" and
01 июл 2025, 15:49
01 июл 2025, 15:49993c1b4
# 2014-08-24
#
# 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 details of the SQL language parser.
# 

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

do_catchsql_test parser1-1.1 {
  CREATE TABLE t1(
    a TEXT PRIMARY KEY,
    b TEXT,
    FOREIGN KEY(b COLLATE nocase DESC) REFERENCES t1(a COLLATE binary ASC)
  );
} {1 {syntax error after column name "b"}}


# Verify that a legacy schema in the sqlite_master file is allowed to have
# COLLATE, ASC, and DESC keywords on the id list of a FK constraint, and that
# those keywords are silently ignored.
#
sqlite3_db_config db DEFENSIVE 0
do_execsql_test parser1-1.2 {
  CREATE TABLE t1(
    a TEXT PRIMARY KEY,
    b TEXT,
    FOREIGN KEY(b) REFERENCES t1(a)
  );
  INSERT INTO t1 VALUES('abc',NULL),('xyz','abc');
  PRAGMA writable_schema=on;
  UPDATE sqlite_master SET sql='CREATE TABLE t1(
    a TEXT PRIMARY KEY,
    b TEXT,
    FOREIGN KEY(b COLLATE nocase) REFERENCES t1(a)
  )' WHERE name='t1';
  SELECT name FROM sqlite_master WHERE sql LIKE '%collate%';
} {t1}
sqlite3 db2 test.db
do_test parser1-1.3 {
  sqlite3 db2 test.db
  db2 eval {SELECT * FROM t1 ORDER BY 1}
} {abc {} xyz abc}
db2 close

do_execsql_test parser1-1.4 {
  UPDATE sqlite_master SET sql='CREATE TABLE t1(
    a TEXT PRIMARY KEY,
    b TEXT,
    FOREIGN KEY(b ASC) REFERENCES t1(a)
  )' WHERE name='t1';
  SELECT name FROM sqlite_master WHERE sql LIKE '%ASC%';
} {t1}
sqlite3 db2 test.db
do_test parser1-1.5 {
  sqlite3 db2 test.db
  db2 eval {SELECT * FROM t1 ORDER BY 1}
} {abc {} xyz abc}
db2 close

do_catchsql_test parser1-2.1 {
  WITH RECURSIVE
    c(x COLLATE binary) AS (VALUES(1) UNION SELECT x+1 FROM c WHERE x<5)
  SELECT x FROM c;
} {1 {syntax error after column name "x"}}
do_catchsql_test parser1-2.2 {
  WITH RECURSIVE
    c(x ASC) AS (VALUES(1) UNION SELECT x+1 FROM c WHERE x<5)
  SELECT x FROM c;
} {1 {syntax error after column name "x"}}

# Verify that the comma between multiple table constraints is
# optional.
#
# The missing comma is technically a syntax error.  But we have to support
# it because there might be legacy databases that omit the commas in their
# sqlite_master tables.
#
do_execsql_test parser1-3.1 {
  CREATE TABLE t300(id INTEGER PRIMARY KEY);
  CREATE TABLE t301(
    id INTEGER PRIMARY KEY,
    c1 INTEGER NOT NULL,
    c2 INTEGER NOT NULL,
    c3 BOOLEAN NOT NULL DEFAULT 0,
    FOREIGN KEY(c1) REFERENCES t300(id) ON DELETE CASCADE ON UPDATE RESTRICT
        /* no comma */
    FOREIGN KEY(c2) REFERENCES t300(id) ON DELETE CASCADE ON UPDATE RESTRICT
        /* no comma */
    UNIQUE(c1, c2)
  );
  PRAGMA foreign_key_list(t301);
} {0 0 t300 c2 id RESTRICT CASCADE NONE 1 0 t300 c1 id RESTRICT CASCADE NONE}

# 2025-07-01 https://sqlite.org/forum/forumpost/f4878de3e7dd4764
# Do not allow parse-time optimizations to omit aggregate functions,
# because doing so can change the meaning of the query.
#
unset -nocomplain zero
set zero [expr {0+0}]
do_execsql_test parser1-4.1 {
  DROP TABLE IF EXISTS t1;
  CREATE TABLE t1(x);
  SELECT max(x) AND $zero FROM t1;
} 0
do_execsql_test parser1-4.2 {
  SELECT max(x) AND 0 FROM t1;
} 0
do_execsql_test parser1-4.3 {
  SELECT max(x) IN () FROM t1;
} 0
do_execsql_test parser1-4.4 {
  SELECT max(x) NOT IN () FROM t1;
} 1


finish_test