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[BugFix] Fix partition resolve bug for materialized view (#34880)
Signed-off-by: shuming.li <ming.moriarty@gmail.com>
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165
fe/fe-core/src/main/java/com/starrocks/sql/analyzer/SlotRefResolver.java
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|---|---|---|
| @@ -0,0 +1,165 @@ | ||
| // Copyright 2021-present StarRocks, Inc. All rights reserved. | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // https://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
| package com.starrocks.sql.analyzer; | ||
|
|
||
| import com.starrocks.analysis.Expr; | ||
| import com.starrocks.analysis.SlotRef; | ||
| import com.starrocks.analysis.TableName; | ||
| import com.starrocks.sql.ast.AstVisitor; | ||
| import com.starrocks.sql.ast.FieldReference; | ||
| import com.starrocks.sql.ast.JoinRelation; | ||
| import com.starrocks.sql.ast.QueryStatement; | ||
| import com.starrocks.sql.ast.Relation; | ||
| import com.starrocks.sql.ast.SelectListItem; | ||
| import com.starrocks.sql.ast.SelectRelation; | ||
| import com.starrocks.sql.ast.SetOperationRelation; | ||
| import com.starrocks.sql.ast.SubqueryRelation; | ||
| import com.starrocks.sql.ast.TableRelation; | ||
| import com.starrocks.sql.ast.ValuesRelation; | ||
| import com.starrocks.sql.ast.ViewRelation; | ||
|
|
||
| /** | ||
| * Resolve the expression(eg: partition column expression) through join/sub-query/view/set operator fo find the slot ref | ||
| * which it comes from. | ||
| */ | ||
| public class SlotRefResolver { | ||
| private static final AstVisitor<Expr, Relation> EXPR_SHUTTLE = new AstVisitor<Expr, Relation>() { | ||
| @Override | ||
| public Expr visitExpression(Expr expr, Relation node) { | ||
| expr = expr.clone(); | ||
| for (int i = 0; i < expr.getChildren().size(); i++) { | ||
| Expr child = expr.getChild(i); | ||
| expr.setChild(i, child.accept(this, node)); | ||
| } | ||
| return expr; | ||
| } | ||
|
|
||
| @Override | ||
| public Expr visitSlot(SlotRef slotRef, Relation node) { | ||
| String tableName = slotRef.getTblNameWithoutAnalyzed().getTbl(); | ||
| if (node.getAlias() != null && !node.getAlias().getTbl().equalsIgnoreCase(tableName)) { | ||
| return slotRef; | ||
| } | ||
| return node.accept(SLOT_REF_RESOLVER, slotRef); | ||
| } | ||
|
|
||
| @Override | ||
| public Expr visitFieldReference(FieldReference fieldReference, Relation node) { | ||
| Field field = node.getScope().getRelationFields() | ||
| .getFieldByIndex(fieldReference.getFieldIndex()); | ||
| return new SlotRef(field.getRelationAlias(), field.getName()); | ||
| } | ||
| }; | ||
|
|
||
| private static final AstVisitor<Expr, SlotRef> SLOT_REF_RESOLVER = new AstVisitor<Expr, SlotRef>() { | ||
| @Override | ||
| public Expr visitSelect(SelectRelation node, SlotRef slot) { | ||
| for (SelectListItem selectListItem : node.getSelectList().getItems()) { | ||
| TableName tableName = slot.getTblNameWithoutAnalyzed(); | ||
| if (selectListItem.getAlias() == null) { | ||
| if (selectListItem.getExpr() instanceof SlotRef) { | ||
| SlotRef result = (SlotRef) selectListItem.getExpr(); | ||
| if (result.getColumnName().equalsIgnoreCase(slot.getColumnName()) | ||
| && (tableName == null || tableName.equals(result.getTblNameWithoutAnalyzed()))) { | ||
| return selectListItem.getExpr().accept(EXPR_SHUTTLE, node.getRelation()); | ||
| } | ||
| } | ||
| } else { | ||
| if (tableName != null && tableName.isFullyQualified()) { | ||
| continue; | ||
| } | ||
| if (selectListItem.getAlias().equalsIgnoreCase(slot.getColumnName())) { | ||
| return selectListItem.getExpr().accept(EXPR_SHUTTLE, node.getRelation()); | ||
| } | ||
| } | ||
| } | ||
| return node.getRelation().accept(this, slot); | ||
| } | ||
|
|
||
| @Override | ||
| public Expr visitSubquery(SubqueryRelation node, SlotRef slot) { | ||
| String tableName = slot.getTblNameWithoutAnalyzed().getTbl(); | ||
| if (!node.getAlias().getTbl().equalsIgnoreCase(tableName)) { | ||
| return null; | ||
| } | ||
| slot = (SlotRef) slot.clone(); | ||
| slot.setTblName(null); //clear table name here, not check it inside | ||
| return node.getQueryStatement().getQueryRelation().accept(this, slot); | ||
| } | ||
|
|
||
| @Override | ||
| public Expr visitTable(TableRelation node, SlotRef slot) { | ||
| TableName tableName = slot.getTblNameWithoutAnalyzed(); | ||
| if (node.getName().equals(tableName)) { | ||
| return slot; | ||
| } | ||
| if (tableName != null && !node.getResolveTableName().equals(tableName)) { | ||
| return null; | ||
| } | ||
| slot = (SlotRef) slot.clone(); | ||
| slot.setTblName(node.getName()); | ||
| return slot; | ||
| } | ||
|
|
||
| @Override | ||
| public Expr visitView(ViewRelation node, SlotRef slot) { | ||
| TableName tableName = slot.getTblNameWithoutAnalyzed(); | ||
| if (tableName != null && !node.getResolveTableName().equals(tableName)) { | ||
| return null; | ||
| } | ||
| slot = (SlotRef) slot.clone(); | ||
| slot.setTblName(null); //clear table name here, not check it inside | ||
| return node.getQueryStatement().getQueryRelation().accept(this, slot); | ||
| } | ||
|
|
||
| @Override | ||
| public Expr visitJoin(JoinRelation node, SlotRef slot) { | ||
| Relation leftRelation = node.getLeft(); | ||
| Expr leftExpr = leftRelation.accept(this, slot); | ||
| if (leftExpr != null) { | ||
| return leftExpr; | ||
| } | ||
| Relation rightRelation = node.getRight(); | ||
| Expr rightExpr = rightRelation.accept(this, slot); | ||
| if (rightExpr != null) { | ||
| return rightExpr; | ||
| } | ||
| return null; | ||
| } | ||
|
|
||
| @Override | ||
| public Expr visitSetOp(SetOperationRelation node, SlotRef slot) { | ||
| for (Relation relation : node.getRelations()) { | ||
| Expr resolved = relation.accept(this, slot); | ||
| if (resolved != null) { | ||
| return resolved; | ||
| } | ||
| } | ||
| return null; | ||
| } | ||
|
|
||
| @Override | ||
| public SlotRef visitValues(ValuesRelation node, SlotRef slot) { | ||
| return null; | ||
| } | ||
| }; | ||
|
|
||
| /** | ||
| * Resolve the expression through join/sub-query/view/set operator fo find the slot ref | ||
| * which it comes from. | ||
| */ | ||
| public static Expr resolveExpr(Expr expr, QueryStatement queryStatement) { | ||
| return expr.accept(EXPR_SHUTTLE, queryStatement.getQueryRelation()); | ||
| } | ||
| } |
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