more expressive tests for jdbcexecutor & sql-api

wayang-api/wayang-api-sql/src/main/java/org/apache/wayang/api/sql/calcite/converter/WayangProjectVisitor.java

@@ -19,14 +19,15 @@
 
 package org.apache.wayang.api.sql.calcite.converter;
 
-import org.apache.calcite.rel.core.Project;
 import org.apache.calcite.rex.RexNode;
 
 import org.apache.wayang.api.sql.calcite.converter.functions.ProjectMapFuncImpl;
 import org.apache.wayang.api.sql.calcite.rel.WayangProject;
 import org.apache.wayang.basic.data.Record;
+import org.apache.wayang.basic.function.ProjectionDescriptor;
 import org.apache.wayang.basic.operators.MapOperator;
 import org.apache.wayang.core.plan.wayangplan.Operator;
+import org.apache.wayang.core.types.BasicDataUnitType;
 
 import java.util.List;
 
@@ -39,14 +40,15 @@ public class WayangProjectVisitor extends WayangRelNodeVisitor<WayangProject> {
     Operator visit(final WayangProject wayangRelNode) {
         final Operator childOp = wayangRelConverter.convert(wayangRelNode.getInput(0));
 
-        /* Quick check */
-        final List<RexNode> projects = ((Project) wayangRelNode).getProjects();
+        final List<RexNode> projects = wayangRelNode.getProjects();
 
-        // TODO: create a map with specific dataset type
-        final MapOperator<Record, Record> projection = new MapOperator<>(
+        final ProjectionDescriptor<Record, Record> projectionDescriptor = new ProjectionDescriptor<>(
                 new ProjectMapFuncImpl(projects),
-                Record.class,
-                Record.class);
+                wayangRelNode.getRowType().getFieldNames(),
+                BasicDataUnitType.createBasic(Record.class),
+                BasicDataUnitType.createBasic(Record.class));
+
+        final MapOperator<Record, Record> projection = new MapOperator<>(projectionDescriptor);
 
         childOp.connectTo(0, projection, 0);
 

wayang-api/wayang-api-sql/src/main/java/org/apache/wayang/api/sql/calcite/converter/WayangTableScanVisitor.java

@@ -26,8 +26,11 @@
 import org.apache.wayang.api.sql.sources.fs.JavaCSVTableSource;
 import org.apache.wayang.core.plan.wayangplan.Operator;
 import org.apache.wayang.core.types.DataSetType;
+import org.apache.wayang.jdbc.operators.JdbcTableSource;
+import org.apache.wayang.jdbc.platform.JdbcPlatformTemplate;
 import org.apache.wayang.postgres.operators.PostgresTableSource;
 import org.apache.wayang.basic.data.Record;
+import org.apache.wayang.basic.operators.TableSource;
 
 import java.util.List;
 import java.util.stream.Collectors;
@@ -49,9 +52,7 @@ Operator visit(final WayangTableScan wayangRelNode) {
 
         if (tableSource.equals("postgres")) {
             return new PostgresTableSource(tableName, columnNames.toArray(String[]::new));
-        }
-
-        if (tableSource.equals("fs")) {
+        } else if (tableSource.equals("fs")) {
             final ModelParser modelParser;
             try {
                 modelParser = this.wayangRelConverter.getConfiguration() == null
@@ -72,7 +73,18 @@ Operator visit(final WayangTableScan wayangRelNode) {
             final char separator = modelParser.getSchemaDelimiter(tableSource);
 
             return new JavaCSVTableSource<>(url, DataSetType.createDefault(Record.class), fieldTypes, separator);
+        } else if (wayangRelNode.getTable().getQualifiedName().size() == 1) {
+            // we assume that it is coming from a test environement or in memory db.
+
+            return new JdbcTableSource(wayangRelNode.getTable().getQualifiedName().get(0), wayangRelNode.getRowType().getFieldNames().toArray(String[]::new)) {
+
+                @Override
+                public JdbcPlatformTemplate getPlatform() {
+                    throw new UnsupportedOperationException("Unimplemented method 'getPlatform'");
+                }
+            };
         } else
-            throw new RuntimeException("Source not supported");
+            throw new RuntimeException(
+                    "Source not supported, got: " + tableSource + ", expected either postgres or filesystem (fs).");
     }
 }

wayang-api/wayang-api-sql/src/main/java/org/apache/wayang/api/sql/calcite/converter/functions/CallTreeFactory.java

@@ -58,14 +58,14 @@ public default Node fromRexNode(final RexNode node) {
      * @return a serializable function of +, -, * or /
      * @throws UnsupportedOperationException on unrecognized {@link SqlKind}
      */
-    public SerializableFunction<List<Object>, Object> deriveOperation(SqlKind kind);
+    public SerializableFunction<List<Object>, Object> deriveOperation(final SqlKind kind);
 }
 
 interface Node extends Serializable {
     public Object evaluate(final Record rec);
 }
 
-class Call implements Node {
+final class Call implements Node {
     private final List<Node> operands;
     final SerializableFunction<List<Object>, Object> operation;
 
@@ -83,7 +83,7 @@ public Object evaluate(final Record rec) {
     }
 }
 
-class Literal implements Node {
+final class Literal implements Node {
     final Serializable value;
 
     Literal(final RexLiteral literal) {
@@ -109,7 +109,7 @@ public Object evaluate(final Record rec) {
     }
 }
 
-class InputRef implements Node {
+final class InputRef implements Node {
     private final int key;
 
     InputRef(final RexInputRef inputRef) {

wayang-api/wayang-api-sql/src/main/java/org/apache/wayang/api/sql/calcite/optimizer/Optimizer.java

@@ -211,11 +211,11 @@ public RelNode optimize(RelNode node, RelTraitSet requiredTraitSet, RuleSet rule
         );
     }
 
-    public WayangPlan convert(RelNode relNode) {
+    public static WayangPlan convert(RelNode relNode) {
         return convert(relNode, new ArrayList<>());
     }
 
-    public WayangPlan convert(RelNode relNode, Collection<Record> collector) {
+    public static WayangPlan convert(RelNode relNode, Collection<Record> collector) {
 
         LocalCallbackSink<Record> sink = LocalCallbackSink.createCollectingSink(collector, Record.class);
 
@@ -225,8 +225,7 @@ public WayangPlan convert(RelNode relNode, Collection<Record> collector) {
         return new WayangPlan(sink);
     }
 
-    public WayangPlan convertWithConfig(RelNode relNode, Configuration configuration, Collection<Record> collector) {
-
+    public static WayangPlan convertWithConfig(RelNode relNode, Configuration configuration, Collection<Record> collector) {
         LocalCallbackSink<Record> sink = LocalCallbackSink.createCollectingSink(collector, Record.class);
 
         Operator op = new WayangRelConverter(configuration).convert(relNode);

wayang-api/wayang-api-sql/src/main/java/org/apache/wayang/api/sql/calcite/rel/WayangTableScan.java

@@ -27,12 +27,12 @@
 import org.apache.calcite.rel.hint.RelHint;
 import org.apache.calcite.schema.Table;
 import org.apache.wayang.api.sql.calcite.convention.WayangConvention;
-import org.apache.wayang.api.sql.calcite.utils.ModelParser;
 
 import java.util.List;
 
 public class WayangTableScan extends TableScan implements WayangRel {
 
+    //TODO: fields are never queried, why?
     private final int[] fields;
 
     public WayangTableScan(RelOptCluster cluster,
@@ -83,11 +83,15 @@ public String toString() {
     }
 
     public String getQualifiedName() {
-        return table.getQualifiedName().get(1);
+        return table.getQualifiedName().size() == 1 
+            ? table.getQualifiedName().get(0) 
+            : table.getQualifiedName().get(1);
     }
 
     public String getTableName() {
-        return table.getQualifiedName().get(1);
+        return table.getQualifiedName().size() == 1 
+            ? table.getQualifiedName().get(0) 
+            : table.getQualifiedName().get(1);
     }
 
     public List<String> getColumnNames() {

wayang-api/wayang-api-sql/src/main/java/org/apache/wayang/api/sql/context/SqlContext.java

@@ -167,7 +167,7 @@ public static void main(final String[] args) throws Exception {
         PrintUtils.print("After translating logical intermediate plan", wayangRel);
 
         final Collection<Record> collector = new ArrayList<>();
-        final WayangPlan wayangPlan = optimizer.convertWithConfig(wayangRel, configuration, collector);
+        final WayangPlan wayangPlan = Optimizer.convertWithConfig(wayangRel, configuration, collector);
         collector.add(new Record(wayangRel.getRowType().getFieldNames().toArray()));
         context.execute(getJobName(), wayangPlan);
 
@@ -182,7 +182,6 @@ public static void main(final String[] args) throws Exception {
     }
 
     public Collection<Record> executeSql(final String sql) throws SqlParseException {
-
         final Properties configProperties = Optimizer.ConfigProperties.getDefaults();
         final RelDataTypeFactory relDataTypeFactory = new JavaTypeFactoryImpl();
 
@@ -216,7 +215,7 @@ public Collection<Record> executeSql(final String sql) throws SqlParseException
         PrintUtils.print("After translating logical intermediate plan", wayangRel);
 
         final Collection<Record> collector = new ArrayList<>();
-        final WayangPlan wayangPlan = optimizer.convert(wayangRel, collector);
+        final WayangPlan wayangPlan = Optimizer.convert(wayangRel, collector);
 
         this.execute(getJobName(), wayangPlan);