Istvan Toth created CALCITE-4138:
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Summary: Metadata operations via Avatica turn empty string args to
null
Key: CALCITE-4138
URL: https://issues.apache.org/jira/browse/CALCITE-4138
Project: Calcite
Issue Type: Bug
Components: avatica
Affects Versions: 1.17.0
Reporter: Istvan Toth
Assignee: Istvan Toth
DatabaseMetaData.getTables(), and some other functions have parameters
(catalog, schemaPattern), where null and empty String have different semantics.
The corresponding protobuf fields in Avatica are Strings, and the Avatica logic
turns those args to null.
This makes it impossible to filter on actual empty string values.
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