|
16 | 16 | * limitations under the License. |
17 | 17 | */ |
18 | 18 |
|
19 | | - |
20 | 19 |
|
21 | 20 | package com.dtstack.flink.sql.parser; |
22 | 21 |
|
23 | | -import org.apache.calcite.config.Lex; |
24 | | -import org.apache.calcite.sql.SqlBasicCall; |
25 | 22 | import org.apache.calcite.sql.SqlInsert; |
26 | 23 | import org.apache.calcite.sql.SqlJoin; |
27 | 24 | import org.apache.calcite.sql.SqlKind; |
28 | | -import org.apache.calcite.sql.SqlMatchRecognize; |
29 | 25 | import org.apache.calcite.sql.SqlNode; |
30 | | -import org.apache.calcite.sql.SqlOrderBy; |
31 | 26 | import org.apache.calcite.sql.SqlSelect; |
32 | | -import org.apache.calcite.sql.parser.SqlParseException; |
33 | | -import org.apache.calcite.sql.parser.SqlParser; |
| 27 | +import org.apache.calcite.sql.SqlNodeList; |
| 28 | +import org.apache.calcite.sql.SqlBasicCall; |
| 29 | +import org.apache.calcite.sql.SqlMatchRecognize; |
| 30 | +import org.apache.calcite.sql.SqlOrderBy; |
| 31 | +import org.apache.calcite.sql.SqlIdentifier; |
| 32 | +import org.apache.calcite.sql.SqlAsOperator; |
| 33 | +import org.apache.calcite.sql.parser.SqlParserPos; |
34 | 34 | import org.apache.commons.lang3.StringUtils; |
35 | 35 | import com.google.common.collect.Lists; |
36 | 36 | import org.apache.flink.table.calcite.FlinkPlannerImpl; |
|
49 | 49 |
|
50 | 50 | public class InsertSqlParser implements IParser { |
51 | 51 |
|
| 52 | + // 用来标识当前解析节点的上一层节点是否为 insert 节点 |
| 53 | + private static Boolean parentIsInsert = false; |
| 54 | + |
52 | 55 | @Override |
53 | 56 | public boolean verify(String sql) { |
54 | 57 | return StringUtils.isNotBlank(sql) && sql.trim().toLowerCase().startsWith("insert"); |
@@ -78,13 +81,19 @@ private static void parseNode(SqlNode sqlNode, SqlParseResult sqlParseResult){ |
78 | 81 | SqlNode sqlTarget = ((SqlInsert)sqlNode).getTargetTable(); |
79 | 82 | SqlNode sqlSource = ((SqlInsert)sqlNode).getSource(); |
80 | 83 | sqlParseResult.addTargetTable(sqlTarget.toString()); |
| 84 | + parentIsInsert = true; |
81 | 85 | parseNode(sqlSource, sqlParseResult); |
82 | 86 | break; |
83 | 87 | case SELECT: |
84 | | - SqlNode sqlFrom = ((SqlSelect)sqlNode).getFrom(); |
85 | | - if(sqlFrom.getKind() == IDENTIFIER){ |
| 88 | + SqlSelect sqlSelect = (SqlSelect) sqlNode; |
| 89 | + if (parentIsInsert) { |
| 90 | + rebuildSelectNode(sqlSelect.getSelectList(), sqlSelect); |
| 91 | + } |
| 92 | + SqlNode sqlFrom = ((SqlSelect) sqlNode).getFrom(); |
| 93 | + if (sqlFrom.getKind() == IDENTIFIER) { |
86 | 94 | sqlParseResult.addSourceTable(sqlFrom.toString()); |
87 | | - }else{ |
| 95 | + } else { |
| 96 | + parentIsInsert = false; |
88 | 97 | parseNode(sqlFrom, sqlParseResult); |
89 | 98 | } |
90 | 99 | break; |
@@ -141,6 +150,44 @@ private static void parseNode(SqlNode sqlNode, SqlParseResult sqlParseResult){ |
141 | 150 | } |
142 | 151 | } |
143 | 152 |
|
| 153 | + /** |
| 154 | + * 将第一层 select 中的 sqlNode 转化为 AsNode,解决字段名冲突问题 |
| 155 | + * 仅对 table.xx 这种类型的字段进行替换 |
| 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 | + || ((SqlIdentifier) selectList.get(index)).names.size() == 1) { |
| 165 | + sqlNodes.add(selectList.get(index)); |
| 166 | + continue; |
| 167 | + } |
| 168 | + sqlNodes.add(transformToAsNode(selectList.get(index))); |
| 169 | + } |
| 170 | + sqlSelect.setSelectList(sqlNodes); |
| 171 | + } |
| 172 | + |
| 173 | + /** |
| 174 | + * 将 sqlNode 转化为 AsNode |
| 175 | + * @param sqlNode 需要转化的 sqlNode |
| 176 | + * @return 重新构造的 AsNode |
| 177 | + */ |
| 178 | + public static SqlBasicCall transformToAsNode(SqlNode sqlNode) { |
| 179 | + String asName = ""; |
| 180 | + SqlParserPos pos = new SqlParserPos(sqlNode.getParserPosition().getLineNum(), |
| 181 | + sqlNode.getParserPosition().getEndColumnNum()); |
| 182 | + if (sqlNode.getKind().equals(SqlKind.IDENTIFIER)) { |
| 183 | + asName = ((SqlIdentifier) sqlNode).names.get(1); |
| 184 | + } |
| 185 | + SqlNode[] operands = new SqlNode[2]; |
| 186 | + operands[0] = sqlNode; |
| 187 | + operands[1] = new SqlIdentifier(asName, null, pos); |
| 188 | + return new SqlBasicCall(new SqlAsOperator(), operands, pos); |
| 189 | + } |
| 190 | + |
144 | 191 | public static class SqlParseResult { |
145 | 192 |
|
146 | 193 | private List<String> sourceTableList = Lists.newArrayList(); |
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