test/subtype1.test - master - niceSOFT/sqlite

test/subtype1.test
116 строк3 KB
dan
When using an index on a CASE expression that may return a value with a subtype, avoid discarding any subtype.
15 май 2026, 22:44
15 май 2026, 22:4461d9f8f
# 2015-09-10
#
# 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 tests for sqlite3_value_subtype() and
# sqlite3_result_subtype() interfaces.
#

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

do_execsql_test subtype1-100 {
  SELECT test_getsubtype('hello');
} {0}
do_execsql_test subtype1-110 {
  SELECT test_getsubtype(test_setsubtype('hello',123));
} {123}
do_execsql_test subtype1-120 {
  SELECT typeof(test_setsubtype('hello',123));
} {text}
do_execsql_test subtype1-130 {
  SELECT test_setsubtype('hello',123);
} {hello}

# 2022-06-09
# https://sqlite.org/forum/forumpost/3d9caa45cbe38c78
#
# Avoid carrying subtypes through into a subquery that has been flattened
# or to which the outer WHERE clause has been pushed down.
#
reset_db
do_execsql_test subtype1-200 {
  CREATE TABLE t1(a); INSERT INTO t1 VALUES ('x');
  CREATE VIEW t2(b) AS SELECT json(TRUE);
  CREATE TABLE t3(b); INSERT INTO t3 VALUES(json(TRUE));
}
do_execsql_test subtype1-210 {
  SELECT * FROM t3, t1 WHERE NOT json_quote(b);
} {1 x}
do_execsql_test subtype1-220 {
  SELECT * FROM t2, t1 WHERE NOT json_quote(b);
} {1 x}
do_execsql_test subtype1-230 {
  WITH t4(a) AS MATERIALIZED (SELECT json(1)) SELECT subtype(a) FROM t4;
} {0}
do_execsql_test subtype1-231 {
  WITH t4(a) AS NOT MATERIALIZED (SELECT json(1)) SELECT subtype(a) FROM t4;
} {0}

# 2023-03-01
# https://sqlite.org/forum/forumpost/37dd14a538
# 
# Additional tests to show that subtypes do not traverse subquery boundaries.
#
do_execsql_test subtype1-300 {
  CREATE TABLE t0(c0);
  INSERT INTO t0 VALUES ('1');
  CREATE VIEW v0(c0) AS SELECT CASE WHEN 1 THEN json_patch('1', '1') END 
                        FROM t0 GROUP BY t0.c0;
  SELECT * FROM v0 WHERE json_quote(v0.c0) != '1';
} {1}
do_execsql_test subtype1-310 {
  SELECT *, json_quote(y) FROM (SELECT +json('1') AS y);
} {1 {"1"}}
do_execsql_test subtype1-320 {
  SELECT *, json_quote(y) FROM (SELECT +json('1') AS y)
   WHERE json_quote(y)='"1"';
} {1 {"1"}}

# 2024-11-26
# subtype survives if()
#
do_execsql_test subtype1-400 {
  WITH t400(id,j) AS (VALUES
    (1,'{a:{x:1,y:2},b:{x:3,y:4}}'),
    (2,'not json')
  )
  SELECT id, subtype(if(json_valid(j,6),j->'a')) FROM t400;
} {1 74 2 0}

#-------------------------------------------------------------------------
# Test that indexes on expressions do not alter subtypes.
#
reset_db
do_execsql_test subtype1-500 {
  CREATE TABLE t1(id, j);
  INSERT INTO t1 VALUES (1,'{a:{x:1,y:2},b:{x:3,y:4}}'), (2,'not json');
}

foreach {tn expr st} {
  510 "(CASE WHEN json_valid(j, 6) THEN j->'a' ELSE j END)"  74
  520 "+(CASE WHEN json_valid(j, 6) THEN j->'a' ELSE j END)" 74
  530 "-(CASE WHEN json_valid(j, 6) THEN j->'a' ELSE j END)" 0
  540 "if( json_valid(j, 6), j->'a' ) " 74
  550 "if( json_valid(j, 6), j->'a' ) COLLATE nocase" 74
  560 "CAST( if( json_valid(j, 6), j->'a' ) AS TEXT )" 74
} {
  do_execsql_test subtype1-$tn.1 "
    SELECT id, subtype( $expr ) FROM t1;
  " [list 1 $st 2 0]

  do_execsql_test subtype1-$tn.2 "
    DROP INDEX IF EXISTS i1;
    CREATE INDEX i1 ON t1( $expr );
    SELECT id, subtype( $expr ) FROM t1 INDEXED BY i1 ORDER BY id;
  " [list 1 $st 2 0]
}


finish_test