thevar1able/ClickHouse
1
0
Fork 0
mirror of https://github.com/ClickHouse/ClickHouse.git synced 2024-11-21 23:21:59 +00:00
Code Issues Packages Projects Releases Wiki Activity

Fixed another case; added a test

Browse Source
This commit is contained in:
Alexey Milovidov 2019-08-10 20:08:14 +03:00
parent b133ea85b4
commit c80aeb0ef1
3 changed files with 9 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
dbms/src/Parsers/ExpressionListParsers.cpp
View File

@ -139,6 +139,7 @@ bool ParserLeftAssociativeBinaryOperatorList::parseImpl(Pos & pos, ASTPtr & node
{
bool first = true;
auto current_depth = pos.depth;
while (1)
{
if (first)
@ -190,10 +191,14 @@ bool ParserLeftAssociativeBinaryOperatorList::parseImpl(Pos & pos, ASTPtr & node
++pos;
}
/// Left associative operator chain is parsed as a tree: ((((1 + 1) + 1) + 1) + 1)...
/// We must account it's depth - otherwise we may end up with stack overflow later - on destruction of AST.
pos.increaseDepth();
node = function;
}
}
pos.depth = current_depth;
return true;
}

2
dbms/tests/queries/0_stateless/00984_parser_stack_overflow.reference
View File

@ -1,4 +1,6 @@
exceeded
exceeded
exceeded
exceeded
20002
1

2
dbms/tests/queries/0_stateless/00984_parser_stack_overflow.sh
View File

@ -7,6 +7,8 @@ CURDIR=$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)
perl -e 'print "(" x 10000' | $CLICKHOUSE_CURL -sS "$CLICKHOUSE_URL" --data-binary @- | grep -oF 'exceeded'
perl -e 'print "SELECT " . ("[" x 10000)' | $CLICKHOUSE_CURL -sS "$CLICKHOUSE_URL" --data-binary @- | grep -oF 'exceeded'
perl -e 'print "SELECT " . ("([" x 5000)' | $CLICKHOUSE_CURL -sS "$CLICKHOUSE_URL" --data-binary @- | grep -oF 'exceeded'
perl -e 'print "SELECT 1" . ("+1" x 10000)' | $CLICKHOUSE_CURL -sS "$CLICKHOUSE_URL" --data-binary @- | grep -oF 'exceeded'
# But this is Ok
perl -e 'print "SELECT 1" . (",1" x 10000)' | $CLICKHOUSE_CURL -sS "$CLICKHOUSE_URL" --data-binary @- | wc -c
perl -e 'print "SELECT 1" . (" OR 1" x 10000)' | $CLICKHOUSE_CURL -sS "$CLICKHOUSE_URL" --data-binary @-