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Do not allow RTree writes when a read cursor is active on the same virtual

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table, as the writes might rebalance and disrupt the read cursors.  Return
the new SQLITE_LOCKED_VTAB error code if this happens.

FossilOrigin-Name: d4ce66610851c825cb712f985216b63e015c753fdd5521f929c67ad18bfd7664
This commit is contained in:
drh
2018-05-24 22:31:01 +00:00
parent b9cd2c4536
commit c8c9cdd9dd
5 changed files with 45 additions and 18 deletions
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15
ext/rtree/rtree8.test
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@ -38,11 +38,20 @@ do_test rtree8-1.1.1 {
} {}
do_test rtree8-1.1.2 {
set res [list]
db eval { SELECT * FROM t1 } {
lappend res $x1 $x2
set rc [catch {
db eval { SELECT * FROM t1 } {
lappend res $x1 $x2
if {$id==3} { db eval { DELETE FROM t1 WHERE id>3 } }
}
} msg];
lappend rc $msg
set rc
} {1 {database table is locked}}
do_test rtree8-1.1.2b {
db eval { SELECT * FROM t1 ORDER BY +id } {
if {$id==3} { db eval { DELETE FROM t1 WHERE id>3 } }
}
set res
db eval {SELECT x1, x2 FROM t1}
} {1 3 2 4 3 5}
do_test rtree8-1.1.3 {
execsql { SELECT * FROM t1 }