fix(schema-compiler): use TO_TIMESTAMP_TZ for ISO 8601 with Z; keep index-friendly casts; add Oracle unit test

Author: Tankilevitch

packages/cubejs-schema-compiler/src/adapter/OracleQuery.ts

@@ -71,11 +71,14 @@ export class OracleQuery extends BaseQuery {
   }
 
   public dateTimeCast(value) {
-    return `to_date(:"${value}", 'YYYY-MM-DD"T"HH24:MI:SS"Z"')`;
+    // Use timezone-aware parsing for ISO 8601 with milliseconds and trailing 'Z', then cast to DATE
+    // to preserve index-friendly comparisons against DATE columns.
+    return `CAST(TO_TIMESTAMP_TZ(:"${value}", 'YYYY-MM-DD"T"HH24:MI:SS.FF"Z"') AS DATE)`;
   }
 
   public timeStampCast(value) {
-    return this.dateTimeCast(value);
+    // Return timezone-aware timestamp for TIMESTAMP comparisons
+    return `TO_TIMESTAMP_TZ(:"${value}", 'YYYY-MM-DD"T"HH24:MI:SS.FF"Z"')`;
   }
 
   public timeStampParam(timeDimension) {

packages/cubejs-schema-compiler/test/unit/oracle-query.test.ts

@@ -0,0 +1,56 @@
+import { OracleQuery } from '../../src/adapter/OracleQuery';
+import { prepareJsCompiler } from './PrepareCompiler';
+
+describe('OracleQuery', () => {
+  const { compiler, joinGraph, cubeEvaluator } = prepareJsCompiler(`
+    cube(\`visitors\`, {
+      sql: \`
+      select * from visitors
+      \`,
+
+      measures: {
+        count: {
+          type: 'count'
+        }
+      },
+
+      dimensions: {
+        id: {
+          sql: 'id',
+          type: 'number',
+          primaryKey: true
+        },
+        createdAt: {
+          type: 'time',
+          sql: 'created_at'
+        }
+      }
+    })
+    `, { adapter: 'oracle' });
+
+  it('uses to_date with seconds precision and preserves trailing Z', async () => {
+    await compiler.compile();
+
+    const query = new OracleQuery(
+      { joinGraph, cubeEvaluator, compiler },
+      {
+        measures: ['visitors.count'],
+        timeDimensions: [
+          {
+            dimension: 'visitors.createdAt',
+            dateRange: ['2024-02-01', '2024-02-02'],
+            granularity: 'day'
+          }
+        ],
+        timezone: 'UTC'
+      }
+    );
+
+    const [sql, params] = query.buildSqlAndParams();
+
+    expect(sql).toContain("CAST(TO_TIMESTAMP_TZ(:\"?\", 'YYYY-MM-DD\"T\"HH24:MI:SS.FF\"Z\"') AS DATE)");
+    expect(params).toEqual(['2024-02-01T00:00:00.000Z']);
+  });
+});
+
+