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https://issues.apache.org/jira/browse/CASSANDRA-13935?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16401439#comment-16401439
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Kurt Greaves commented on CASSANDRA-13935:
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Thanks Javier, change seems straightforward enough to me. I've kicked off unit
tests.
|[3.0|https://circleci.com/gh/kgreav/cassandra/142]|[3.11|https://circleci.com/gh/kgreav/cassandra/143]|[trunk|https://circleci.com/gh/kgreav/cassandra/144]|
> Indexes creation should have IF EXISTS on its String representation
> -------------------------------------------------------------------
>
> Key: CASSANDRA-13935
> URL: https://issues.apache.org/jira/browse/CASSANDRA-13935
> Project: Cassandra
> Issue Type: Bug
> Components: CQL, Secondary Indexes
> Environment: Ubuntu 16.04.2 LTS
> java version "1.8.0_144"
> Java(TM) SE Runtime Environment (build 1.8.0_144-b01)
> Java HotSpot(TM) 64-Bit Server VM (build 25.144-b01, mixed mode)
> Reporter: Javier Canillas
> Assignee: Javier Canillas
> Priority: Trivial
> Fix For: 3.11.x
>
> Attachments: 13935-3.0.txt, 13935-3.11.txt, 13935-trunk.txt
>
>
> I came across something that bothers me a lot. I'm using snapshots to backup
> data from my Cassandra cluster in case something really bad happens (like
> dropping a table or a keyspace).
> Exercising the recovery actions from those backups, I discover that the
> schema put on the file "schema.cql" as a result of the snapshot has the
> "CREATE IF NOT EXISTS" for the table, but not for the indexes.
> When restoring from snapshots, and relying on the execution of these schemas
> to build up the table structure, everything seems fine for tables without
> secondary indexes, but for the ones that make use of them, the execution of
> these statements fail miserably.
> Here I paste a generated schema.cql content for a table with indexes:
> CREATE TABLE IF NOT EXISTS keyspace1.table1 (
> id text PRIMARY KEY,
> content text,
> last_update_date date,
> last_update_date_time timestamp)
> WITH ID = f1045fc0-2f59-11e7-95ec-295c3c064920
> AND bloom_filter_fp_chance = 0.01
> AND dclocal_read_repair_chance = 0.1
> AND crc_check_chance = 1.0
> AND default_time_to_live = 8640000
> AND gc_grace_seconds = 864000
> AND min_index_interval = 128
> AND max_index_interval = 2048
> AND memtable_flush_period_in_ms = 0
> AND read_repair_chance = 0.0
> AND speculative_retry = '99PERCENTILE'
> AND caching = { 'keys': 'NONE', 'rows_per_partition': 'NONE' }
> AND compaction = { 'max_threshold': '32', 'min_threshold': '4',
> 'class': 'org.apache.cassandra.db.compaction.SizeTieredCompactionStrategy' }
> AND compression = { 'chunk_length_in_kb': '64', 'class':
> 'org.apache.cassandra.io.compress.LZ4Compressor' }
> AND cdc = false
> AND extensions = { };
> CREATE INDEX table1_last_update_date_idx ON keyspace1.table1
> (last_update_date);
> I think the last part should be:
> CREATE INDEX IF NOT EXISTS table1_last_update_date_idx ON keyspace1.table1
> (last_update_date);
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