Fix getting views for Hive metastore 2.3+ #24466
Merged
+46
−5
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On certain databases (e.g. Derby, Oracle) it uses
CLOB
and these databases disallow=
predicates overCLOB
values. At the same time, they allowLIKE
predicates over them.cherry-picked : trinodb/trino#833
Description
Added a new private method getPrestoViews(String databaseName):
a. First attempts = predicate on PRESTO_VIEW_FLAG.
b. If it fails, attempts LIKE predicate.
c. Stores successful attempts in metastoreKnownToSupportTableParamEqualsPredicate and metastoreKnownToSupportTableParamLikePredicate.
Motivation and Context
Hive 2.3 metastore
provides more space for table parameter values. On certain databases (e.g. Derby, Oracle) it usesCLOB
and these databases disallow=
predicates overCLOB values
. At the same time, they allowLIKE
predicates over them.This fixes
SHOW TABLES
and queries over information_schema.tables.Also, fixes #10735, nico-arianto/big-data-local#1.
Impact
Clob datatype issue resolved.
Test Plan
checked using presto-cli.
Contributor checklist
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