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20 | 20 |
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21 | 21 | package com.dtstack.flink.sql.parser;
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22 | 22 |
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23 |
| -import org.apache.calcite.config.Lex; |
24 |
| -import org.apache.calcite.sql.SqlBasicCall; |
25 | 23 | import org.apache.calcite.sql.SqlInsert;
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26 | 24 | import org.apache.calcite.sql.SqlJoin;
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27 | 25 | import org.apache.calcite.sql.SqlKind;
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28 |
| -import org.apache.calcite.sql.SqlMatchRecognize; |
29 | 26 | import org.apache.calcite.sql.SqlNode;
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30 |
| -import org.apache.calcite.sql.SqlOrderBy; |
31 | 27 | import org.apache.calcite.sql.SqlSelect;
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32 |
| -import org.apache.calcite.sql.parser.SqlParseException; |
33 |
| -import org.apache.calcite.sql.parser.SqlParser; |
| 28 | +import org.apache.calcite.sql.SqlNodeList; |
| 29 | +import org.apache.calcite.sql.SqlBasicCall; |
| 30 | +import org.apache.calcite.sql.SqlMatchRecognize; |
| 31 | +import org.apache.calcite.sql.SqlOrderBy; |
| 32 | +import org.apache.calcite.sql.SqlIdentifier; |
| 33 | +import org.apache.calcite.sql.SqlAsOperator; |
| 34 | +import org.apache.calcite.sql.parser.SqlParserPos; |
34 | 35 | import org.apache.commons.lang3.StringUtils;
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35 | 36 | import com.google.common.collect.Lists;
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36 | 37 | import org.apache.flink.table.calcite.FlinkPlannerImpl;
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49 | 50 |
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50 | 51 | public class InsertSqlParser implements IParser {
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51 | 52 |
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| 53 | + // 用来标识当前解析节点的上一层节点是否为 insert 节点 |
| 54 | + private static Boolean parentIsInsert = false; |
| 55 | + |
52 | 56 | @Override
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53 | 57 | public boolean verify(String sql) {
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54 | 58 | return StringUtils.isNotBlank(sql) && sql.trim().toLowerCase().startsWith("insert");
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@@ -78,13 +82,19 @@ private static void parseNode(SqlNode sqlNode, SqlParseResult sqlParseResult){
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78 | 82 | SqlNode sqlTarget = ((SqlInsert)sqlNode).getTargetTable();
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79 | 83 | SqlNode sqlSource = ((SqlInsert)sqlNode).getSource();
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80 | 84 | sqlParseResult.addTargetTable(sqlTarget.toString());
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| 85 | + parentIsInsert = true; |
81 | 86 | parseNode(sqlSource, sqlParseResult);
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82 | 87 | break;
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83 | 88 | case SELECT:
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84 |
| - SqlNode sqlFrom = ((SqlSelect)sqlNode).getFrom(); |
85 |
| - if(sqlFrom.getKind() == IDENTIFIER){ |
| 89 | + SqlSelect sqlSelect = (SqlSelect) sqlNode; |
| 90 | + if (parentIsInsert) { |
| 91 | + rebuildSelectNode(sqlSelect.getSelectList(), sqlSelect); |
| 92 | + } |
| 93 | + SqlNode sqlFrom = ((SqlSelect) sqlNode).getFrom(); |
| 94 | + if (sqlFrom.getKind() == IDENTIFIER) { |
86 | 95 | sqlParseResult.addSourceTable(sqlFrom.toString());
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87 |
| - }else{ |
| 96 | + } else { |
| 97 | + parentIsInsert = false; |
88 | 98 | parseNode(sqlFrom, sqlParseResult);
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89 | 99 | }
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90 | 100 | break;
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@@ -141,6 +151,42 @@ private static void parseNode(SqlNode sqlNode, SqlParseResult sqlParseResult){
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141 | 151 | }
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142 | 152 | }
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143 | 153 |
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| 154 | + /** |
| 155 | + * 将第一层 select 中的 sqlNode 转化为 AsNode,解决字段名冲突问题 |
| 156 | + * @param selectList select Node 的 select 字段 |
| 157 | + * @param sqlSelect 第一层解析出来的 selectNode |
| 158 | + */ |
| 159 | + private static void rebuildSelectNode(SqlNodeList selectList, SqlSelect sqlSelect) { |
| 160 | + SqlNodeList sqlNodes = new SqlNodeList(selectList.getParserPosition()); |
| 161 | + |
| 162 | + for (int index = 0; index < selectList.size(); index++) { |
| 163 | + if (selectList.get(index).getKind().equals(SqlKind.AS)) { |
| 164 | + sqlNodes.add(selectList.get(index)); |
| 165 | + continue; |
| 166 | + } |
| 167 | + sqlNodes.add(transformToAsNode(selectList.get(index))); |
| 168 | + } |
| 169 | + sqlSelect.setSelectList(sqlNodes); |
| 170 | + } |
| 171 | + |
| 172 | + /** |
| 173 | + * 将 sqlNode 转化为 AsNode |
| 174 | + * @param sqlNode 需要转化的 sqlNode |
| 175 | + * @return 重新构造的 AsNode |
| 176 | + */ |
| 177 | + public static SqlBasicCall transformToAsNode(SqlNode sqlNode) { |
| 178 | + String asName = ""; |
| 179 | + SqlParserPos pos = new SqlParserPos(sqlNode.getParserPosition().getLineNum(), |
| 180 | + sqlNode.getParserPosition().getEndColumnNum()); |
| 181 | + if (sqlNode.getKind().equals(SqlKind.IDENTIFIER)) { |
| 182 | + asName = ((SqlIdentifier) sqlNode).names.get(1); |
| 183 | + } |
| 184 | + SqlNode[] operands = new SqlNode[2]; |
| 185 | + operands[0] = sqlNode; |
| 186 | + operands[1] = new SqlIdentifier(asName, null, pos); |
| 187 | + return new SqlBasicCall(new SqlAsOperator(), operands, pos); |
| 188 | + } |
| 189 | + |
144 | 190 | public static class SqlParseResult {
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145 | 191 |
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146 | 192 | private List<String> sourceTableList = Lists.newArrayList();
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