# 2017-12-16
#
# 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.
#
#*************************************************************************
#
# Test cases for the sqlite_offset() function.
#
# Some of the tests in this file depend on the exact placement of content
# within b-tree pages.  Such placement is at the implementations discretion,
# and so it is possible for results to change from one release to the next.
#
set testdir [file dirname $argv0]
source $testdir/tester.tcl
ifcapable !offset_sql_func {
  finish_test
  return
}
 
do_execsql_test func6-100 {
  PRAGMA page_size=4096;
  PRAGMA auto_vacuum=NONE;
  CREATE TABLE t1(a,b,c,d);
  WITH RECURSIVE c(x) AS (VALUES(1) UNION ALL SELECT x+1 FROM c WHERE x<100)
   INSERT INTO t1(a,b,c,d) SELECT printf('abc%03x',x), x, 1000-x, NULL FROM c;
  CREATE INDEX t1a ON t1(a);
  CREATE INDEX t1bc ON t1(b,c);
  CREATE TABLE t2(x TEXT PRIMARY KEY, y) WITHOUT ROWID;
  INSERT INTO t2(x,y) SELECT a, b FROM t1;
}
do_execsql_test func6-110 {
  SELECT a, sqlite_offset(d)/4096 + 1,
            sqlite_offset(d)%4096 FROM t1
   ORDER BY rowid LIMIT 2;
} {abc001 2 4084 abc002 2 4069}
do_execsql_test func6-120 {
  SELECT a, typeof(sqlite_offset(+a)) FROM t1
   ORDER BY rowid LIMIT 2;
} {abc001 null abc002 null}
do_execsql_test func6-130 {
  SELECT a, sqlite_offset(a)/4096+1, 
         sqlite_offset(a)%4096
   FROM t1
   ORDER BY a LIMIT 2;
} {abc001 3 4087 abc002 3 4076}
do_execsql_test func6-140 {
  SELECT a, sqlite_offset(d)/4096+1, 
         sqlite_offset(d)%4096
   FROM t1
   ORDER BY a LIMIT 2;
} {abc001 2 4084 abc002 2 4069}
do_execsql_test func6-150 {
  SELECT a,
         sqlite_offset(a)/4096+1, 
         sqlite_offset(a)%4096,
         sqlite_offset(d)/4096+1, 
         sqlite_offset(d)%4096
   FROM t1
   ORDER BY a LIMIT 2;
} {abc001 3 4087 2 4084 abc002 3 4076 2 4069}
do_execsql_test func6-160 {
  SELECT b,
         sqlite_offset(b)/4096+1, 
         sqlite_offset(b)%4096,
         sqlite_offset(c)/4096+1, 
         sqlite_offset(c)%4096,
         sqlite_offset(d)/4096+1, 
         sqlite_offset(d)%4096
   FROM t1
   ORDER BY b LIMIT 2;
} {1 4 4090 4 4090 2 4084 2 4 4081 4 4081 2 4069}
 
 
do_execsql_test func6-200 {
  SELECT y, sqlite_offset(y)/4096+1,
         sqlite_offset(y)%4096
   FROM t2
   ORDER BY x LIMIT 2;
} {1 5 4087 2 5 4076}
 
finish_test