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ddl: fix create hash partition table makes tidb OOM (#16194) #16219

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Apr 9, 2020
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ddl: fix create hash partition table makes tidb OOM (#16194) #16219

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ddl: fix create hash partition table makes tidb OOM (#16194)
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@tiancaiamao @sre-bot
tiancaiamao authored and sre-bot committed Apr 9, 2020
commit 2de5533a2005d3f54d19c96a49b35e4c3e25cbf1
11 changes: 11 additions & 0 deletions ddl/db_partition_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -292,6 +292,17 @@ func (s *testIntegrationSuite7) TestCreateTableWithHashPartition(c *C) {
store_id int
)
partition by hash( year(hired) ) partitions 4;`)

// This query makes tidb OOM without partition count check.
tk.MustGetErrCode(`CREATE TABLE employees (
id INT NOT NULL,
fname VARCHAR(30),
lname VARCHAR(30),
hired DATE NOT NULL DEFAULT '1970-01-01',
separated DATE NOT NULL DEFAULT '9999-12-31',
job_code INT,
store_id INT
) PARTITION BY HASH(store_id) PARTITIONS 102400000000;`, tmysql.ErrTooManyPartitions)
}

func (s *testIntegrationSuite10) TestCreateTableWithRangeColumnPartition(c *C) {
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4 changes: 4 additions & 0 deletions ddl/partition.go
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Expand Up @@ -122,6 +122,10 @@ func buildTablePartitionInfo(ctx sessionctx.Context, s *ast.CreateTableStmt) (*m
}

func buildHashPartitionDefinitions(ctx sessionctx.Context, s *ast.CreateTableStmt, pi *model.PartitionInfo) error {
if err := checkAddPartitionTooManyPartitions(pi.Num); err != nil {
return err
}

defs := make([]model.PartitionDefinition, pi.Num)
for i := 0; i < len(defs); i++ {
if len(s.Partition.Definitions) == 0 {
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