[CALCITE-6436] JDBC adapter generates SQL missing parentheses when comparing 3 values with the same precedence like (a=b)=c

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.37.0
• Fix Version/s: 1.38.0
• Component/s: core
• Labels: pull-request-available
• Assignee: xiong duan
• Reporter: Ulrich Kramer
• Created: 13/Jun/24 15:27
• Updated: 17/Oct/24 22:41
• Resolved: 17/Oct/24 22:41

Description

Running the following unit test in JdbcAdapterTest fails with

@Test void testOperatorInWhere() {
    CalciteAssert.model(FoodmartSchema.FOODMART_MODEL)
        .query("select * from \"sales_fact_1997\" "
            + "where (\"product_id\" = 1) = ?")
        .consumesPreparedStatement(p -> p.setBoolean(1, true))
        .runs();
  }

Caused by: java.sql.SQLSyntaxErrorException: unexpected token: = : line: 3 in statement [SELECT *
FROM "foodmart"."sales_fact_1997"
WHERE "product_id" = 1 = ?

Issue Links

• links to: GitHub Pull Request #3841