ClickHouse / ClickHouse/clickhouse-java

[jdbc-v2] JDBC Escaping

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#2,352 1 comment 1 reaction 0 assignees View on GitHub
area:jdbc-insert bug jdbc-v2
Dominant language
Java
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Description

### Description
JDBC escaping allows to write portable (really not) SQL statements that can be run with different JDBC drivers to get same affect. For example, `{ts 2025-02-20}` should be interpreted by driver as native function like `toTimestamp()` and other drivers should do similar way.

Current JDBC implementation
- does escaping always but should be controlled by `com.clickhouse.jdbc.StatementImpl#setEscapeProcessing`
- should be true for both Statement and PreparedStatement with according tests
- lacks of documentation https://clickhouse.com/docs/integrations/language-clients/java/jdbc
- done after prepared statement is parsed but should before (to not confuse parser :-))

There is a good explanation of how JDBC escaping works https://jdbc.postgresql.org/documentation/escapes/.

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