maropu commented on a change in pull request #32858:
URL: https://github.com/apache/spark/pull/32858#discussion_r649659422
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File path:
sql/catalyst/src/main/antlr4/org/apache/spark/sql/catalyst/parser/SqlBase.g4
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@@ -930,7 +930,7 @@ complexColTypeList
;
complexColType
- : identifier ':' dataType (NOT NULL)? commentSpec?
+ : identifier ':'? dataType (NOT NULL)? commentSpec?
Review comment:
Could you update the SQL doc?
https://github.com/apache/spark/blame/master/docs/sql-ref-datatypes.md#L197
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File path: docs/sql-ref-datatypes.md
##########
@@ -194,7 +194,7 @@ The following table shows the type names as well as aliases
used in Spark SQL pa
|**DecimalType**|DECIMAL, DEC, NUMERIC|
|**CalendarIntervalType**|INTERVAL|
|**ArrayType**|ARRAY\<element_type>|
-|**StructType**|STRUCT<field1_name: field1_type, field2_name: field2_type,
...>|
+|**StructType**|STRUCT<field1_name field1_type, field2_name field2_type, ...>|
Review comment:
Instead of removing `:`, how about writing `Note that : is optional`
like
https://github.com/apache/spark/blame/master/docs/sql-ref-datatypes.md#L172 ?
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