arina-ielchiieva commented on a change in pull request #1666: DRILL-7058:
Refresh command to support subset of columns
URL: https://github.com/apache/drill/pull/1666#discussion_r261613770
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File path: exec/java-exec/src/main/codegen/includes/parserImpls.ftl
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@@ -464,22 +464,30 @@ SqlNode SqlDropSchema(SqlParserPos pos) :
/**
* Parse refresh table metadata statement.
- * REFRESH TABLE METADATA tblname
+ * REFRESH TABLE METADATA [COLUMNS ((field1, field2,..) | NONE)] tblname
*/
SqlNode SqlRefreshMetadata() :
{
SqlParserPos pos;
SqlIdentifier tblName;
- SqlNodeList fieldList;
+ SqlNodeList fieldList = null;
SqlNode query;
+ boolean allColumns = true;
}
{
<REFRESH> { pos = getPos(); }
<TABLE>
<METADATA>
+ [
+ <COLUMNS> { allColumns = false; }
+ ( fieldList = ParseRequiredFieldList("Table")
+ |
+ <NONE>
Review comment:
Do we need `NONE` here? I think if columns keyword is present list of
columns is required.
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