Github user maryannxue commented on a diff in the pull request:
https://github.com/apache/phoenix/pull/212#discussion_r81202889
--- 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);
+ RexNode rex = proj.getChildExps().get(0);
+
+ Expression e = CalciteUtils.toExpression(rex, implementor);
+ ImmutableBytesWritable ptr = new ImmutableBytesWritable();
+ e = ExpressionUtil.getConstantExpression(e, ptr);
+ Object ret = e.getDataType().toObject(ptr);
+ if(ret instanceof NlsString){
+ ret = ((NlsString) ret).toString();
+ }
+ return ret;
+ }
+ catch (Exception e){
+ throw new RuntimeException("Could not convert literal to its
object type: " + e);
--- End diff --
Normally you don't append the Exception itself to the end of the error
message. You message should include the exact SqlLiteral it failed to convert
and add the original Exception as inner exception.
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