vdiravka commented on a change in pull request #1527: DRILL-4456: Fix Hive
translate UDF
URL: https://github.com/apache/drill/pull/1527#discussion_r231862125
##########
File path:
exec/java-exec/src/main/java/org/apache/drill/exec/planner/sql/DrillConvertletTable.java
##########
@@ -61,13 +69,36 @@
}
};
+ // Custom convertlet to avoid rewriting TIMESTAMP_DIFF by Calcite.
+ private static final SqlRexConvertlet TIMESTAMP_DIFF_CONVERTLET = (cx, call)
-> {
+ SqlLiteral unitLiteral = call.operand(0);
+ SqlIntervalQualifier qualifier =
+ new SqlIntervalQualifier(unitLiteral.symbolValue(TimeUnit.class),
null, SqlParserPos.ZERO);
+
+ List<RexNode> operands = Arrays.asList(
+ cx.convertExpression(qualifier),
+ cx.convertExpression(call.operand(1)),
+ cx.convertExpression(call.operand(2)));
+
+ RelDataTypeFactory typeFactory = cx.getTypeFactory();
+
+ RelDataType returnType = typeFactory.createTypeWithNullability(
+ typeFactory.createSqlType(SqlTypeName.BIGINT),
+ cx.getValidator().getValidatedNodeType(call.operand(1)).isNullable()
+ ||
cx.getValidator().getValidatedNodeType(call.operand(2)).isNullable());
+
+ return cx.getRexBuilder().makeCall(returnType,
+ SqlStdOperatorTable.TIMESTAMP_DIFF, operands);
+ };
+
static {
// Use custom convertlet for EXTRACT function
map.put(SqlStdOperatorTable.EXTRACT, DrillExtractConvertlet.INSTANCE);
// SQRT needs it's own convertlet because calcite overrides it to POWER(x,
0.5)
// which is not suitable for Infinity value case
map.put(SqlStdOperatorTable.SQRT, SQRT_CONVERTLET);
map.put(SqlStdOperatorTable.COALESCE, COALESCE_CONVERTLET);
+ map.put(SqlStdOperatorTable.TIMESTAMP_DIFF, TIMESTAMP_DIFF_CONVERTLET);
Review comment:
move the the string to the end of the block, since it is a last added
`SqlFunction`
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