Github user maryannxue commented on a diff in the pull request:
https://github.com/apache/phoenix/pull/212#discussion_r81201783
--- Diff:
phoenix-core/src/main/java/org/apache/phoenix/calcite/CalciteUtils.java ---
@@ -1036,4 +1048,40 @@ public Void visitCall(RexCall call) {
return null;
}
}
+
+ public static Object convertLiteral(SqlLiteral literal,
PhoenixRelImplementor implementor) {
+ try {
+ final SchemaPlus rootSchema =
Frameworks.createRootSchema(true);
+ final FrameworkConfig config = Frameworks.newConfigBuilder()
+ .parserConfig(SqlParser.Config.DEFAULT)
+ .defaultSchema(rootSchema).build();
+ Planner planner = Frameworks.getPlanner(config);
+
+ SqlParserPos POS = SqlParserPos.ZERO;
+ final SqlNodeList selectList =
+ new SqlNodeList(
+ Collections.singletonList(literal),
+ SqlParserPos.ZERO);
+
+
+ String sql = new SqlSelect(POS, SqlNodeList.EMPTY, selectList,
null, null, null, null,
+ SqlNodeList.EMPTY, null, null, null).toString();
+ SqlNode sqlNode = planner.parse(sql);
+ sqlNode = planner.validate(sqlNode);
+ Project proj = (Project) (planner.rel(sqlNode).rel);
--- End diff --
Probably better to add an "assert" here to ensure the rel object is of
Project class before casting it. Similarly, assert that this Project has only
one expression for the following statement.
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