LakeShen commented on code in PR #3436:
URL: https://github.com/apache/calcite/pull/3436#discussion_r1334438219


##########
core/src/test/java/org/apache/calcite/test/JdbcTest.java:
##########
@@ -3119,6 +3125,96 @@ void testInnerJoinValues(String format) {
             "deptno=10; name=Sales; employees=[{100, 10, Bill, 10000.0, 1000}, 
{150, 10, Sebastian, 7000.0, null}]; location={-122, 38}");
   }
 
+  /** Test case for
+   * <a 
href="https://issues.apache.org/jira/browse/CALCITE-5984";>[CALCITE-5984]</a>
+   * Disabling trimming of unused fields via config and program. */
+  @Test void testJoinWithTrimmingDisabled() {
+    CalciteAssert.hr().query("select \"d\".\"name\" from \"hr\".\"depts\" as 
\"d\" \n"
+                + "  join \"hr\".\"emps\" as \"e\" on \"d\".\"deptno\" = 
\"e\".\"deptno\" \n")
+        .withHook(Hook.SQL2REL_CONVERTER_CONFIG_BUILDER,
+            (Consumer<Holder<Config>>) configHolder ->
+            configHolder.set(configHolder.get().withTrimUnusedFields(false)))
+        .withHook(Hook.PROGRAM,
+            (Consumer<Holder<Program>>)
+            programHolder -> programHolder
+                    .set(sequence(Programs.SUB_QUERY_PROGRAM, getProgram(), 
Programs.CALC_PROGRAM)))
+        .convertContains(""
+                + "LogicalProject(name=[$1])\n"
+                + "  LogicalJoin(condition=[=($0, $5)], joinType=[inner])\n"
+                + "    LogicalTableScan(table=[[hr, depts]])\n"
+                + "    LogicalTableScan(table=[[hr, emps]])\n"
+                + "");
+  }
+
+  /** Test case for
+   * <a 
href="https://issues.apache.org/jira/browse/CALCITE-5984";>[CALCITE-5984]</a>
+   * Disabling trimming of unused fields via config and program. */
+  @Test void testJoinWithTrimmingEnabledByConfig() {
+    CalciteAssert.hr().query("select \"d\".\"name\" from \"hr\".\"depts\" as 
\"d\" \n"
+                + "  join \"hr\".\"emps\" as \"e\" on \"d\".\"deptno\" = 
\"e\".\"deptno\" \n")
+        .withHook(Hook.SQL2REL_CONVERTER_CONFIG_BUILDER,
+            (Consumer<Holder<Config>>) configHolder ->
+            configHolder.set(configHolder.get().withTrimUnusedFields(true)))
+        .withHook(Hook.PROGRAM,
+            (Consumer<Holder<Program>>)
+            programHolder -> programHolder
+                    .set(sequence(Programs.SUB_QUERY_PROGRAM, getProgram(), 
Programs.CALC_PROGRAM)))
+        .convertContains(""
+                + "LogicalProject(name=[$1])\n"
+                + "  LogicalJoin(condition=[=($0, $2)], joinType=[inner])\n"
+                + "    LogicalProject(deptno=[$0], name=[$1])\n"
+                + "      LogicalTableScan(table=[[hr, depts]])\n"
+                + "    LogicalProject(deptno=[$1])\n"
+                + "      LogicalTableScan(table=[[hr, emps]])\n"
+                + "");
+  }
+
+  /** Test case for
+   * <a 
href="https://issues.apache.org/jira/browse/CALCITE-5984";>[CALCITE-5984]</a>
+   * Disabling trimming of unused fields via config and program. */
+  @Test void testJoinWithTrimmingEnabledByProgram() {
+    CalciteAssert.hr().query("select \"d\".\"name\" from \"hr\".\"depts\" as 
\"d\" \n"
+                + "  join \"hr\".\"emps\" as \"e\" on \"d\".\"deptno\" = 
\"e\".\"deptno\" \n")
+        .withHook(Hook.SQL2REL_CONVERTER_CONFIG_BUILDER,
+            (Consumer<Holder<Config>>) configHolder ->
+            configHolder.set(configHolder.get().withTrimUnusedFields(false)))
+        .withHook(Hook.PROGRAM,
+            (Consumer<Holder<Program>>)
+            programHolder -> programHolder
+                    .set(Programs.standard()))
+        .convertContains(""
+                + "LogicalProject(name=[$1])\n"
+                + "  LogicalJoin(condition=[=($0, $2)], joinType=[inner])\n"
+                + "    LogicalProject(deptno=[$0], name=[$1])\n"
+                + "      LogicalTableScan(table=[[hr, depts]])\n"
+                + "    LogicalProject(deptno=[$1])\n"
+                + "      LogicalTableScan(table=[[hr, emps]])\n"
+                + "");
+  }
+
+  /** Test case for
+   * <a 
href="https://issues.apache.org/jira/browse/CALCITE-5984";>[CALCITE-5984]</a>
+   * Disabling trimming of unused fields via config and program. */
+  @Test void testJoinWithTrimmingEnabledByProgramAndConfig() {
+    CalciteAssert.hr().query("select \"d\".\"name\" from \"hr\".\"depts\" as 
\"d\" \n"
+                + "  join \"hr\".\"emps\" as \"e\" on \"d\".\"deptno\" = 
\"e\".\"deptno\" \n")
+        .withHook(Hook.SQL2REL_CONVERTER_CONFIG_BUILDER,
+            (Consumer<Holder<Config>>) configHolder ->
+                
configHolder.set(configHolder.get().withTrimUnusedFields(true)))

Review Comment:
   I see the sql is same as above,the withTrimUnusedFields method has different 
parameters, but the plan is the same.
   
   Why did you use this SQL example?



##########
core/src/test/java/org/apache/calcite/test/JdbcTest.java:
##########
@@ -3119,6 +3125,96 @@ void testInnerJoinValues(String format) {
             "deptno=10; name=Sales; employees=[{100, 10, Bill, 10000.0, 1000}, 
{150, 10, Sebastian, 7000.0, null}]; location={-122, 38}");
   }
 
+  /** Test case for
+   * <a 
href="https://issues.apache.org/jira/browse/CALCITE-5984";>[CALCITE-5984]</a>
+   * Disabling trimming of unused fields via config and program. */
+  @Test void testJoinWithTrimmingDisabled() {
+    CalciteAssert.hr().query("select \"d\".\"name\" from \"hr\".\"depts\" as 
\"d\" \n"
+                + "  join \"hr\".\"emps\" as \"e\" on \"d\".\"deptno\" = 
\"e\".\"deptno\" \n")
+        .withHook(Hook.SQL2REL_CONVERTER_CONFIG_BUILDER,
+            (Consumer<Holder<Config>>) configHolder ->
+            configHolder.set(configHolder.get().withTrimUnusedFields(false)))
+        .withHook(Hook.PROGRAM,
+            (Consumer<Holder<Program>>)
+            programHolder -> programHolder
+                    .set(sequence(Programs.SUB_QUERY_PROGRAM, getProgram(), 
Programs.CALC_PROGRAM)))
+        .convertContains(""
+                + "LogicalProject(name=[$1])\n"
+                + "  LogicalJoin(condition=[=($0, $5)], joinType=[inner])\n"
+                + "    LogicalTableScan(table=[[hr, depts]])\n"
+                + "    LogicalTableScan(table=[[hr, emps]])\n"
+                + "");
+  }
+
+  /** Test case for
+   * <a 
href="https://issues.apache.org/jira/browse/CALCITE-5984";>[CALCITE-5984]</a>
+   * Disabling trimming of unused fields via config and program. */
+  @Test void testJoinWithTrimmingEnabledByConfig() {
+    CalciteAssert.hr().query("select \"d\".\"name\" from \"hr\".\"depts\" as 
\"d\" \n"
+                + "  join \"hr\".\"emps\" as \"e\" on \"d\".\"deptno\" = 
\"e\".\"deptno\" \n")
+        .withHook(Hook.SQL2REL_CONVERTER_CONFIG_BUILDER,
+            (Consumer<Holder<Config>>) configHolder ->
+            configHolder.set(configHolder.get().withTrimUnusedFields(true)))
+        .withHook(Hook.PROGRAM,
+            (Consumer<Holder<Program>>)
+            programHolder -> programHolder
+                    .set(sequence(Programs.SUB_QUERY_PROGRAM, getProgram(), 
Programs.CALC_PROGRAM)))
+        .convertContains(""
+                + "LogicalProject(name=[$1])\n"
+                + "  LogicalJoin(condition=[=($0, $2)], joinType=[inner])\n"
+                + "    LogicalProject(deptno=[$0], name=[$1])\n"
+                + "      LogicalTableScan(table=[[hr, depts]])\n"
+                + "    LogicalProject(deptno=[$1])\n"
+                + "      LogicalTableScan(table=[[hr, emps]])\n"
+                + "");
+  }
+
+  /** Test case for
+   * <a 
href="https://issues.apache.org/jira/browse/CALCITE-5984";>[CALCITE-5984]</a>
+   * Disabling trimming of unused fields via config and program. */
+  @Test void testJoinWithTrimmingEnabledByProgram() {
+    CalciteAssert.hr().query("select \"d\".\"name\" from \"hr\".\"depts\" as 
\"d\" \n"
+                + "  join \"hr\".\"emps\" as \"e\" on \"d\".\"deptno\" = 
\"e\".\"deptno\" \n")
+        .withHook(Hook.SQL2REL_CONVERTER_CONFIG_BUILDER,
+            (Consumer<Holder<Config>>) configHolder ->
+            configHolder.set(configHolder.get().withTrimUnusedFields(false)))
+        .withHook(Hook.PROGRAM,
+            (Consumer<Holder<Program>>)
+            programHolder -> programHolder
+                    .set(Programs.standard()))
+        .convertContains(""
+                + "LogicalProject(name=[$1])\n"
+                + "  LogicalJoin(condition=[=($0, $2)], joinType=[inner])\n"
+                + "    LogicalProject(deptno=[$0], name=[$1])\n"
+                + "      LogicalTableScan(table=[[hr, depts]])\n"
+                + "    LogicalProject(deptno=[$1])\n"
+                + "      LogicalTableScan(table=[[hr, emps]])\n"
+                + "");
+  }
+
+  /** Test case for
+   * <a 
href="https://issues.apache.org/jira/browse/CALCITE-5984";>[CALCITE-5984]</a>
+   * Disabling trimming of unused fields via config and program. */
+  @Test void testJoinWithTrimmingEnabledByProgramAndConfig() {
+    CalciteAssert.hr().query("select \"d\".\"name\" from \"hr\".\"depts\" as 
\"d\" \n"
+                + "  join \"hr\".\"emps\" as \"e\" on \"d\".\"deptno\" = 
\"e\".\"deptno\" \n")
+        .withHook(Hook.SQL2REL_CONVERTER_CONFIG_BUILDER,
+            (Consumer<Holder<Config>>) configHolder ->
+                
configHolder.set(configHolder.get().withTrimUnusedFields(true)))

Review Comment:
   I see the sql is same as above,the withTrimUnusedFields method has different 
parameters, but the plan is the same.
   
   Why did you use this SQL example?



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