morrySnow commented on code in PR #48537:
URL: https://github.com/apache/doris/pull/48537#discussion_r1998031718
##########
fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/generator/Explode.java:
##########
@@ -18,47 +18,71 @@
package org.apache.doris.nereids.trees.expressions.functions.generator;
import org.apache.doris.catalog.FunctionSignature;
+import org.apache.doris.nereids.exceptions.AnalysisException;
import org.apache.doris.nereids.trees.expressions.Expression;
import org.apache.doris.nereids.trees.expressions.functions.AlwaysNullable;
-import org.apache.doris.nereids.trees.expressions.shape.BinaryExpression;
+import
org.apache.doris.nereids.trees.expressions.functions.ExplicitlyCastableSignature;
import org.apache.doris.nereids.trees.expressions.visitor.ExpressionVisitor;
import org.apache.doris.nereids.types.ArrayType;
-import org.apache.doris.nereids.types.coercion.AnyDataType;
-import org.apache.doris.nereids.types.coercion.FollowToAnyDataType;
+import org.apache.doris.nereids.types.DataType;
+import org.apache.doris.nereids.types.NullType;
+import org.apache.doris.nereids.types.StructField;
+import org.apache.doris.nereids.types.StructType;
import com.google.common.base.Preconditions;
import com.google.common.collect.ImmutableList;
+import java.util.ArrayList;
import java.util.List;
/**
* explode([1, 2, 3]), generate 3 lines include 1, 2 and 3.
*/
Review Comment:
change this comment
##########
fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/generator/ExplodeOuter.java:
##########
Review Comment:
same as Explode
##########
fe/fe-core/src/main/java/org/apache/doris/nereids/parser/LogicalPlanBuilder.java:
##########
@@ -1694,7 +1694,13 @@ protected LogicalPlan withGenerate(LogicalPlan plan,
LateralViewContext ctx) {
// if later view explode map type, we need to add a project to convert
map to struct
String columnName = ctx.columnNames.get(0).getText();
List<String> expandColumnNames = Lists.newArrayList();
- if (ctx.columnNames.size() > 1) {
+
+ // explode can pass multiple columns
+ // then use struct to return the result of the expansion of multiple
columns.
+ String funcName = ctx.functionName.getText().toLowerCase();
+ if (ctx.columnNames.size() > 1 || (funcName.equals("explode")
+ || funcName.equals("explode_outer")
+ || funcName.equals("explode_variant_array"))) {
Review Comment:
add a function to
`org.apache.doris.catalog.BuiltinTableGeneratingFunctions`, this function
return a case insensitive list that include "explode", "explode_outer" and
"explode_variant_array"
##########
fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/generator/Explode.java:
##########
@@ -18,47 +18,71 @@
package org.apache.doris.nereids.trees.expressions.functions.generator;
import org.apache.doris.catalog.FunctionSignature;
+import org.apache.doris.nereids.exceptions.AnalysisException;
import org.apache.doris.nereids.trees.expressions.Expression;
import org.apache.doris.nereids.trees.expressions.functions.AlwaysNullable;
-import org.apache.doris.nereids.trees.expressions.shape.BinaryExpression;
+import
org.apache.doris.nereids.trees.expressions.functions.ExplicitlyCastableSignature;
import org.apache.doris.nereids.trees.expressions.visitor.ExpressionVisitor;
import org.apache.doris.nereids.types.ArrayType;
-import org.apache.doris.nereids.types.coercion.AnyDataType;
-import org.apache.doris.nereids.types.coercion.FollowToAnyDataType;
+import org.apache.doris.nereids.types.DataType;
+import org.apache.doris.nereids.types.NullType;
+import org.apache.doris.nereids.types.StructField;
+import org.apache.doris.nereids.types.StructType;
import com.google.common.base.Preconditions;
import com.google.common.collect.ImmutableList;
+import java.util.ArrayList;
import java.util.List;
/**
* explode([1, 2, 3]), generate 3 lines include 1, 2 and 3.
*/
-public class Explode extends TableGeneratingFunction implements
BinaryExpression, AlwaysNullable {
-
- public static final List<FunctionSignature> SIGNATURES = ImmutableList.of(
- FunctionSignature.ret(new
FollowToAnyDataType(0)).args(ArrayType.of(new AnyDataType(0)))
- );
+public class Explode extends TableGeneratingFunction implements
ExplicitlyCastableSignature, AlwaysNullable {
/**
- * constructor with 1 argument.
+ * constructor with one or more argument.
*/
- public Explode(Expression arg) {
- super("explode", arg);
+ public Explode(Expression[] args) {
+ super("explode", args);
}
/**
* withChildren.
*/
@Override
public Explode withChildren(List<Expression> children) {
- Preconditions.checkArgument(children.size() == 1);
- return new Explode(children.get(0));
+ Preconditions.checkArgument(!children.isEmpty());
+ return new Explode(children.toArray(new Expression[0]));
+ }
+
+ @Override
+ public void checkLegalityBeforeTypeCoercion() {
+ for (Expression child : children) {
+ if (!child.isNullLiteral() && !(child.getDataType() instanceof
ArrayType)) {
+ throw new AnalysisException("only support array type for
explode function but got "
+ + child.getDataType());
+ }
+ }
}
@Override
public List<FunctionSignature> getSignatures() {
- return SIGNATURES;
+ List<DataType> arguments = new ArrayList<>();
+ ImmutableList.Builder<StructField> structFields =
ImmutableList.builder();
+ for (int i = 0; i < children.size(); i++) {
+ if (children.get(i).isNullLiteral()) {
+ arguments.add(ArrayType.of(NullType.INSTANCE));
+ structFields.add(
+ new StructField("col" + (i + 1),
ArrayType.of(NullType.INSTANCE).getItemType(), true, ""));
Review Comment:
should check NullLiteral's DataType and process it with three situations:
- ArrayType
- NullType
- other types
##########
fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/generator/Explode.java:
##########
@@ -18,47 +18,71 @@
package org.apache.doris.nereids.trees.expressions.functions.generator;
import org.apache.doris.catalog.FunctionSignature;
+import org.apache.doris.nereids.exceptions.AnalysisException;
import org.apache.doris.nereids.trees.expressions.Expression;
import org.apache.doris.nereids.trees.expressions.functions.AlwaysNullable;
-import org.apache.doris.nereids.trees.expressions.shape.BinaryExpression;
+import
org.apache.doris.nereids.trees.expressions.functions.ExplicitlyCastableSignature;
import org.apache.doris.nereids.trees.expressions.visitor.ExpressionVisitor;
import org.apache.doris.nereids.types.ArrayType;
-import org.apache.doris.nereids.types.coercion.AnyDataType;
-import org.apache.doris.nereids.types.coercion.FollowToAnyDataType;
+import org.apache.doris.nereids.types.DataType;
+import org.apache.doris.nereids.types.NullType;
+import org.apache.doris.nereids.types.StructField;
+import org.apache.doris.nereids.types.StructType;
import com.google.common.base.Preconditions;
import com.google.common.collect.ImmutableList;
+import java.util.ArrayList;
import java.util.List;
/**
* explode([1, 2, 3]), generate 3 lines include 1, 2 and 3.
*/
-public class Explode extends TableGeneratingFunction implements
BinaryExpression, AlwaysNullable {
-
- public static final List<FunctionSignature> SIGNATURES = ImmutableList.of(
- FunctionSignature.ret(new
FollowToAnyDataType(0)).args(ArrayType.of(new AnyDataType(0)))
- );
+public class Explode extends TableGeneratingFunction implements
ExplicitlyCastableSignature, AlwaysNullable {
Review Comment:
just like create named struct, we should impl `CumstomSignature` and
`ComputePrecision` @amorynan
##########
fe/fe-core/src/main/java/org/apache/doris/nereids/parser/LogicalPlanBuilder.java:
##########
@@ -1694,7 +1694,13 @@ protected LogicalPlan withGenerate(LogicalPlan plan,
LateralViewContext ctx) {
// if later view explode map type, we need to add a project to convert
map to struct
String columnName = ctx.columnNames.get(0).getText();
List<String> expandColumnNames = Lists.newArrayList();
Review Comment:
```suggestion
List<String> expandColumnNames = ImmutableList.of();
```
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