Vladimir Sitnikov created CALCITE-3673:
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Summary: ListTransientTable should not leave tables in the schema
Key: CALCITE-3673
URL: https://issues.apache.org/jira/browse/CALCITE-3673
Project: Calcite
Issue Type: New Feature
Components: core
Affects Versions: 1.21.0
Reporter: Vladimir Sitnikov
1) org.apache.calcite.schema.impl.ListTransientTable#scan adds itself to a
schema: root.getRootSchema().add(name, this); however, it misses cleanup, so it
looks like a memory leak
2) ListTransientTable is not implementable with EnumerableTableScan as
org.apache.calcite.tools.RelBuilder#transientScan(java.lang.String,
org.apache.calcite.rel.type.RelDataType) is using
org.apache.calcite.prepare.RelOptTableImpl#create(org.apache.calcite.plan.RelOptSchema,
org.apache.calcite.rel.type.RelDataType, org.apache.calcite.schema.Table,
com.google.common.collect.ImmutableList<java.lang.String>) which creates
RelOptTableImpl with NULL expressionFunction which means
org.apache.calcite.prepare.RelOptTableImpl#getExpression returns null
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