Github user jinfengni commented on a diff in the pull request:
https://github.com/apache/drill/pull/377#discussion_r53536497
--- Diff:
exec/java-exec/src/main/java/org/apache/drill/exec/planner/sql/DrillSqlOperator.java
---
@@ -18,69 +18,81 @@
package org.apache.drill.exec.planner.sql;
-import com.google.common.base.Preconditions;
-import org.apache.drill.common.types.TypeProtos.MajorType;
-import org.apache.drill.common.types.TypeProtos.MinorType;
+import com.google.common.collect.Lists;
+import com.google.common.collect.Sets;
+
+import java.util.List;
+import java.util.Set;
+
+import org.apache.calcite.avatica.util.TimeUnit;
+import org.apache.calcite.sql.SqlIntervalQualifier;
import org.apache.calcite.rel.type.RelDataType;
import org.apache.calcite.rel.type.RelDataTypeFactory;
-import org.apache.calcite.sql.SqlCall;
import org.apache.calcite.sql.SqlFunction;
import org.apache.calcite.sql.SqlFunctionCategory;
import org.apache.calcite.sql.SqlIdentifier;
import org.apache.calcite.sql.SqlOperatorBinding;
import org.apache.calcite.sql.parser.SqlParserPos;
import org.apache.calcite.sql.type.SqlTypeName;
-import org.apache.calcite.sql.validate.SqlValidator;
-import org.apache.calcite.sql.validate.SqlValidatorScope;
+
+import org.apache.drill.common.expression.DumbLogicalExpression;
+import org.apache.drill.common.expression.ExpressionPosition;
+import org.apache.drill.common.expression.FunctionCall;
+import org.apache.drill.common.expression.LogicalExpression;
+import org.apache.drill.common.types.TypeProtos.MajorType;
+import org.apache.drill.common.types.TypeProtos.MinorType;
+import org.apache.drill.common.types.Types;
+import
org.apache.drill.exec.expr.annotations.FunctionTemplate.NullHandling;
+import org.apache.drill.exec.expr.fn.DrillFuncHolder;
+import org.apache.drill.exec.planner.logical.DrillConstExecutor;
+import org.apache.drill.exec.resolver.FunctionResolver;
+import org.apache.drill.exec.resolver.FunctionResolverFactory;
public class DrillSqlOperator extends SqlFunction {
- static final org.slf4j.Logger logger =
org.slf4j.LoggerFactory.getLogger(DrillSqlOperator.class);
+ // static final org.slf4j.Logger logger =
org.slf4j.LoggerFactory.getLogger(DrillSqlOperator.class);
private static final MajorType NONE = MajorType.getDefaultInstance();
- private final MajorType returnType;
private final boolean isDeterministic;
+ private final List<DrillFuncHolder> functions;
+ @Deprecated
public DrillSqlOperator(String name, int argCount, boolean
isDeterministic) {
- this(name, argCount, MajorType.getDefaultInstance(), isDeterministic);
+ this(name, null, argCount, isDeterministic);
}
- public DrillSqlOperator(String name, int argCount, MajorType returnType,
boolean isDeterminisitic) {
- super(new SqlIdentifier(name, SqlParserPos.ZERO),
DynamicReturnType.INSTANCE, null, new Checker(argCount), null,
SqlFunctionCategory.USER_DEFINED_FUNCTION);
- this.returnType = Preconditions.checkNotNull(returnType);
- this.isDeterministic = isDeterminisitic;
+ public DrillSqlOperator(String name, int argCount, MajorType returnType,
boolean isDeterministic) {
+ super(new SqlIdentifier(name, SqlParserPos.ZERO),
+ null,
--- End diff --
Why do you pass null as SqlReturnTypeInference? Why do you put the logic
for returnTypeInference in a static method in TypeInferenceUtils? To sense, it
makes more sense to implement SqlReturnTypeInference for different
DrillSqlOperator. There could be a Drill general TypeInference for most of
drill functions, in addition to specific one ("concast", "decimal"). Will it
better to keep such logic in the TyepInferenceUtil?
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