| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 |
| * |
| * http://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 org.apache.drill.exec.planner.sql.parser; |
| |
| import java.util.List; |
| |
| import org.apache.calcite.sql.SqlCall; |
| import org.apache.calcite.sql.SqlKind; |
| import org.apache.calcite.sql.SqlLiteral; |
| import org.apache.calcite.sql.SqlNode; |
| import org.apache.calcite.sql.SqlNodeList; |
| import org.apache.calcite.sql.SqlNumericLiteral; |
| import org.apache.calcite.sql.SqlOperator; |
| import org.apache.calcite.sql.SqlSpecialOperator; |
| import org.apache.calcite.sql.SqlWriter; |
| import org.apache.calcite.sql.parser.SqlParserPos; |
| import org.apache.drill.exec.planner.sql.handlers.AbstractSqlHandler; |
| import org.apache.drill.exec.planner.sql.handlers.AnalyzeTableHandler; |
| import org.apache.drill.exec.planner.sql.handlers.SqlHandlerConfig; |
| import org.apache.drill.exec.util.Pointer; |
| |
| import org.apache.drill.shaded.guava.com.google.common.base.Preconditions; |
| import org.apache.drill.shaded.guava.com.google.common.collect.ImmutableList; |
| import org.apache.drill.shaded.guava.com.google.common.collect.Lists; |
| |
| /** |
| * SQL tree for ANALYZE statement. |
| */ |
| public class SqlAnalyzeTable extends DrillSqlCall { |
| public static final SqlSpecialOperator OPERATOR = new SqlSpecialOperator("ANALYZE_TABLE", SqlKind.OTHER_DDL) { |
| public SqlCall createCall(SqlLiteral functionQualifier, SqlParserPos pos, SqlNode... operands) { |
| Preconditions.checkArgument(operands.length == 4, "SqlAnalyzeTable.createCall() has to get 4 operands!"); |
| return new SqlAnalyzeTable(pos, operands[0], (SqlLiteral) operands[1], |
| (SqlNodeList) operands[2], (SqlNumericLiteral) operands[3] |
| ); |
| } |
| }; |
| |
| private final SqlNode tableRef; |
| private final SqlLiteral estimate; |
| private final SqlNodeList fieldList; |
| private final SqlNumericLiteral samplePercent; |
| |
| public SqlAnalyzeTable(SqlParserPos pos, SqlNode tableRef, SqlLiteral estimate, |
| SqlNodeList fieldList, SqlNumericLiteral samplePercent) { |
| super(pos); |
| this.tableRef = tableRef; |
| this.estimate = estimate; |
| this.fieldList = fieldList; |
| this.samplePercent = samplePercent; |
| } |
| |
| @Override |
| public SqlOperator getOperator() { |
| return OPERATOR; |
| } |
| |
| @Override |
| public List<SqlNode> getOperandList() { |
| final List<SqlNode> operands = Lists.newArrayListWithCapacity(4); |
| operands.add(tableRef); |
| operands.add(estimate); |
| operands.add(fieldList); |
| operands.add(samplePercent); |
| return operands; |
| } |
| |
| @Override |
| public void unparse(SqlWriter writer, int leftPrec, int rightPrec) { |
| writer.keyword("ANALYZE"); |
| writer.keyword("TABLE"); |
| tableRef.unparse(writer, leftPrec, rightPrec); |
| writer.keyword(estimate.booleanValue() ? "ESTIMATE" : "COMPUTE"); |
| writer.keyword("STATISTICS"); |
| |
| if (fieldList != null && fieldList.size() > 0) { |
| writer.keyword("("); |
| fieldList.get(0).unparse(writer, leftPrec, rightPrec); |
| for (int i = 1; i < fieldList.size(); i++) { |
| writer.keyword(","); |
| fieldList.get(i).unparse(writer, leftPrec, rightPrec); |
| } |
| writer.keyword(")"); |
| } |
| writer.keyword("SAMPLE"); |
| samplePercent.unparse(writer, leftPrec, rightPrec); |
| writer.keyword("PERCENT"); |
| } |
| |
| @Override |
| public AbstractSqlHandler getSqlHandler(SqlHandlerConfig config, Pointer<String> textPlan) { |
| return new AnalyzeTableHandler(config, textPlan); |
| } |
| |
| @Override |
| public AbstractSqlHandler getSqlHandler(SqlHandlerConfig config) { |
| return getSqlHandler(config, null); |
| } |
| |
| public SqlNode getTableRef() { |
| return tableRef; |
| } |
| |
| public List<String> getFieldNames() { |
| if (fieldList == null) { |
| return ImmutableList.of(); |
| } |
| |
| List<String> columnNames = Lists.newArrayList(); |
| for (SqlNode node : fieldList.getList()) { |
| columnNames.add(node.toString()); |
| } |
| return columnNames; |
| } |
| |
| public SqlNodeList getFieldList() { |
| return fieldList; |
| } |
| |
| public boolean getEstimate() { |
| return estimate.booleanValue(); |
| } |
| |
| public int getSamplePercent() { |
| return samplePercent.intValue(true); |
| } |
| } |