jcralmeida commented on a change in pull request #11982:
URL: https://github.com/apache/arrow/pull/11982#discussion_r774482622
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File path: format/FlightSql.proto
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@@ -867,6 +867,45 @@ enum SqlSupportsConvert {
SQL_CONVERT_VARCHAR = 19;
}
+/*
+ * Represents a request to retrieve information about data type supported ona
Flight SQL enabled backend.
+ * Used in the command member of FlightDescriptor for the following RPC calls:
+ * - GetSchema: return the schema of the query.
+ * - GetFlightInfo: execute the catalog metadata request.
+ *
+ * The returned schema will be:
+ * <
+ * type_name: utf8 not null,
+ * data_type: int not null,
+ * column_size: int,
+ * literal_prefix: utf8,
+ * literal_suffix: utf8,
+ * create_params: utf8
+ * nullable: int not null,
+ * case_sensitive: bool null,
+ * searchable: int not null,
+ * unsigned_attribute: bool,
+ * fixed_prec_scale: bool null,
+ * auto_increment: bool,
+ * local_type_name: utf8,
+ * minimum_scale: int,
+ * maximum_scale: int,
+ * sql_data_type: int not null,
+ * sql_datetime_sub: int,
+ * num_prec_radix: int,
+ * interval_precision. int
+ * >
+ * The returned data should be ordered by data_type and then by type_name.
+ */
+message CommandGetTypeInfo {
+ option (experimental) = true;
+
+ /*
+ * Specifies the data type to search for the info.
+ */
+ optional int32 data_type = 1;
Review comment:
This is a value that can be passed through the client. We've added it
thinking in the implementation with the ODBC since the call SQLGetTypeInfo
receives a parameter to filter for a specific data type. The JDBC call doesn't
receive any parameter that's why we made it optional
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