Apache Calcite

https://calcite.apache.org/

Apache Calcite is an industry-standard SQL parser, validator, and JDBC driver. It represents your query in relational algebra, transforms using planning rules, and optimizes according to a cost model. In addition, you can connect to third-party data sources, browse metadata, and optimize by pushing the computation to the data.

Supported databases:

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You can find Apache Calcite in these categories:

Apache Calcite in SQL Parsing Tools

https://calcite.apache.org/

Apache Calcite is an industry-standard SQL parser, validator, and JDBC driver. It represents your query in relational algebra, transforms using planning rules, and optimizes according to a cost model. In addition, you can connect to third-party data sources, browse metadata, and optimize by pushing the computation to the data.