Vladimir Sitnikov created CALCITE-486:
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Summary: Fast-path for EnumerableCalc in case of trivial program
Key: CALCITE-486
URL: https://issues.apache.org/jira/browse/CALCITE-486
Project: Calcite
Issue Type: Bug
Reporter: Vladimir Sitnikov
Assignee: Julian Hyde
It looks like in case when row type differs just in the column names,
enumerable is still processed.
{{JdbcTest.testInnerJoinValues}}
Note how input "VALUES" is passed through custom enumerable that has no meaning.
This should be optimized.
{code:java}
/* 5 */ final org.apache.calcite.linq4j.Enumerable _inputEnumerable =
org.apache.calcite.linq4j.Linq4j.asEnumerable(new Object[] {
/* 6 */ new Object[] {
/* 7 */ 10,
/* 8 */ "SameName"}});
...
/* 25 */ public Object current() {
/* 26 */ final Object[] current = (Object[])
inputEnumerator.current();
/* 27 */ return new Object[] {
/* 28 */ current[0],
/* 29 */ current[1]};
/* 30 */ }
{code}
Full code
{code:java}
/* 1 */ org.apache.calcite.DataContext root;
/* 2 */
/* 3 */ public org.apache.calcite.linq4j.Enumerable bind(final
org.apache.calcite.DataContext root0) {
/* 4 */ root = root0;
/* 5 */ final org.apache.calcite.linq4j.Enumerable _inputEnumerable =
org.apache.calcite.linq4j.Linq4j.asEnumerable(new Object[] {
/* 6 */ new Object[] {
/* 7 */ 10,
/* 8 */ "SameName"}});
/* 9 */ final org.apache.calcite.linq4j.AbstractEnumerable left = new
org.apache.calcite.linq4j.AbstractEnumerable(){
/* 10 */ public org.apache.calcite.linq4j.Enumerator enumerator() {
/* 11 */ return new org.apache.calcite.linq4j.Enumerator(){
/* 12 */ public final org.apache.calcite.linq4j.Enumerator
inputEnumerator = _inputEnumerable.enumerator();
/* 13 */ public void reset() {
/* 14 */ inputEnumerator.reset();
/* 15 */ }
/* 16 */
/* 17 */ public boolean moveNext() {
/* 18 */ return inputEnumerator.moveNext();
/* 19 */ }
/* 20 */
/* 21 */ public void close() {
/* 22 */ inputEnumerator.close();
/* 23 */ }
/* 24 */
/* 25 */ public Object current() {
/* 26 */ final Object[] current = (Object[])
inputEnumerator.current();
/* 27 */ return new Object[] {
/* 28 */ current[0],
/* 29 */ current[1]};
/* 30 */ }
/* 31 */
/* 32 */ };
/* 33 */ }
/* 34 */
/* 35 */ };
/* 36 */ final org.apache.calcite.linq4j.Enumerable _inputEnumerable0 =
left.join(org.apache.calcite.linq4j.Linq4j.asEnumerable(((org.apache.calcite.test.JdbcTest.LingualSchema)
((org.apache.calcite.adapter.java.ReflectiveSchema)
root.getRootSchema().getSubSchema("SALES").unwrap(org.apache.calcite.adapter.java.ReflectiveSchema.class)).getTarget()).EMPS),
new org.apache.calcite.linq4j.function.Function1() {
/* 37 */ public java.util.List apply(Object[] v1) {
/* 38 */ return java.util.Collections.EMPTY_LIST;
/* 39 */ }
/* 40 */ public Object apply(Object v1) {
/* 41 */ return apply(
/* 42 */ (Object[]) v1);
/* 43 */ }
/* 44 */ }
/* 45 */ , new org.apache.calcite.linq4j.function.Function1() {
/* 46 */ public java.util.List
apply(org.apache.calcite.test.JdbcTest.LingualEmp v1) {
/* 47 */ return java.util.Collections.EMPTY_LIST;
/* 48 */ }
/* 49 */ public Object apply(Object v1) {
/* 50 */ return apply(
/* 51 */ (org.apache.calcite.test.JdbcTest.LingualEmp) v1);
/* 52 */ }
/* 53 */ }
/* 54 */ , new org.apache.calcite.linq4j.function.Function2() {
/* 55 */ public Object[] apply(Object[] left,
org.apache.calcite.test.JdbcTest.LingualEmp right) {
/* 56 */ return new Object[] {
/* 57 */ left[0],
/* 58 */ left[1],
/* 59 */ right.EMPNO,
/* 60 */ right.DEPTNO};
/* 61 */ }
/* 62 */ public Object[] apply(Object left, Object right) {
/* 63 */ return apply(
/* 64 */ (Object[]) left,
/* 65 */ (org.apache.calcite.test.JdbcTest.LingualEmp) right);
/* 66 */ }
/* 67 */ }
/* 68 */ , null, false, false);
/* 69 */ final org.apache.calcite.linq4j.AbstractEnumerable child = new
org.apache.calcite.linq4j.AbstractEnumerable(){
/* 70 */ public org.apache.calcite.linq4j.Enumerator enumerator() {
/* 71 */ return new org.apache.calcite.linq4j.Enumerator(){
/* 72 */ public final org.apache.calcite.linq4j.Enumerator
inputEnumerator = _inputEnumerable0.enumerator();
/* 73 */ public void reset() {
/* 74 */ inputEnumerator.reset();
/* 75 */ }
/* 76 */
/* 77 */ public boolean moveNext() {
/* 78 */ while (inputEnumerator.moveNext()) {
/* 79 */ final Object[] current = (Object[])
inputEnumerator.current();
/* 80 */ if
(org.apache.calcite.runtime.SqlFunctions.toInt(current[3]) ==
org.apache.calcite.runtime.SqlFunctions.toInt(current[0]) &&
org.apache.calcite.runtime.SqlFunctions.eq(current[1] == null ? (String) null :
current[1].toString(), "SameName")) {
/* 81 */ return true;
/* 82 */ }
/* 83 */ }
/* 84 */ return false;
/* 85 */ }
/* 86 */
/* 87 */ public void close() {
/* 88 */ inputEnumerator.close();
/* 89 */ }
/* 90 */
/* 91 */ public Object current() {
/* 92 */ final Object[] current = (Object[])
inputEnumerator.current();
/* 93 */ return new Object[] {
/* 94 */ current[2],
/* 95 */ current[1]};
/* 96 */ }
/* 97 */
/* 98 */ };
/* 99 */ }
/* 100 */
/* 101 */ };
/* 102 */ return
child.distinct(org.apache.calcite.linq4j.function.Functions.arrayComparer());
/* 103 */ }
/* 104 */
/* 105 */
/* 106 */ public java.lang.reflect.Type getElementType() {
/* 107 */ return java.lang.Object[].class;
/* 108 */ }
/* 109 */
/* 110 */
{code}
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