fix(influxdb): merge compat query series and quote explicit columns

crates/dbx-core/src/sql_dialect/table_select.rs

@@ -608,14 +608,21 @@ pub(super) fn build_select_columns(
             .collect::<Vec<_>>()
             .join(", ");
     }
-    if !matches!(database_type, Some(DatabaseType::Hive | DatabaseType::Kyuubi | DatabaseType::Impala)) {
+    if !matches!(
+        database_type,
+        Some(DatabaseType::Hive | DatabaseType::Kyuubi | DatabaseType::Impala | DatabaseType::InfluxDb)
+    ) {
         return "*".to_string();
     }
     columns
         .iter()
         .map(|column| {
             let ident = quote_table_identifier(database_type, column);
-            format!("{ident} AS {ident}")
+            if database_type == Some(DatabaseType::Hive) {
+                format!("{ident} AS {ident}")
+            } else {
+                ident
+            }
         })
         .collect::<Vec<_>>()
         .join(", ")
@@ -770,6 +777,22 @@ mod tests {
         }
     }
 
+    #[test]
+    fn influxdb_table_select_quotes_explicit_columns() {
+        // InfluxQL needs double-quoted identifiers and only permits ORDER BY on
+        // the time column; explicit column lists must not fall back to "*".
+        assert_eq!(
+            build_table_data_select_sql(TableDataSelectSqlOptions {
+                database_type: Some(DatabaseType::InfluxDb),
+                database: Some("monitor".to_string()),
+                table_name: "cpu".to_string(),
+                columns: vec!["time".to_string(), "host".to_string(), "value".to_string()],
+                ..Default::default()
+            }),
+            "SELECT \"time\", \"host\", \"value\" FROM \"cpu\" ORDER BY time DESC LIMIT 100;"
+        );
+    }
+
     #[test]
     fn databricks_table_select_uses_backtick_identifiers() {
         assert_eq!(

crates/dbx-core/src/sql_dialect/tests.rs

@@ -492,7 +492,7 @@ fn builds_table_data_where_and_schema_queries() {
             include_row_id: false,
             ..Default::default()
         }),
-        "SELECT `id` AS `id`, `name` AS `name` FROM `dbx_demo`.`connection_test` ORDER BY 1 LIMIT 2 OFFSET 1;"
+        "SELECT `id`, `name` FROM `dbx_demo`.`connection_test` ORDER BY 1 LIMIT 2 OFFSET 1;"
     );
     assert_eq!(
         build_table_data_select_sql(TableDataSelectSqlOptions {