fix: resolve optimization issue for extended query

Cargo.lock

@@ -9619,8 +9619,7 @@ dependencies = [
 [[package]]
 name = "pgwire"
 version = "0.38.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "89d5e5a60d3f6e40c91f6a2a7f8d09665e636272bd5611977253559b6651aabb"
+source = "git+https://github.com/sunng87/pgwire?rev=26ee9805c433bc56262c6075b8c12f9c9e132364#26ee9805c433bc56262c6075b8c12f9c9e132364"
 dependencies = [
  "async-trait",
  "base64 0.22.1",

Cargo.toml

@@ -345,6 +345,7 @@ datafusion-datasource = { git = "https://github.com/GreptimeTeam/datafusion.git"
 datafusion-sql = { git = "https://github.com/GreptimeTeam/datafusion.git", rev = "02b82535e0160c4545667f36a03e1ff9d1d2e51f" }
 datafusion-substrait = { git = "https://github.com/GreptimeTeam/datafusion.git", rev = "02b82535e0160c4545667f36a03e1ff9d1d2e51f" }
 sqlparser = { git = "https://github.com/GreptimeTeam/sqlparser-rs.git", rev = "2aefa08a8d69c96eec2d6d6703598a009bba6e4c" }                           # on branch v0.61.x
+pgwire = { git = "https://github.com/sunng87/pgwire", rev = "26ee9805c433bc56262c6075b8c12f9c9e132364" }
 
 [profile.release]
 debug = 1

src/query/src/datafusion.rs

@@ -444,32 +444,17 @@ impl QueryEngine for DatafusionQueryEngine {
     async fn describe(
         &self,
         plan: LogicalPlan,
-        query_ctx: QueryContextRef,
+        _query_ctx: QueryContextRef,
     ) -> Result<DescribeResult> {
-        let ctx = self.engine_context(query_ctx);
-        if let Ok(optimised_plan) = self.optimize(&ctx, &plan) {
-            let schema = optimised_plan
-                .schema()
-                .clone()
-                .try_into()
-                .context(ConvertSchemaSnafu)?;
-            Ok(DescribeResult {
-                schema,
-                logical_plan: optimised_plan,
-            })
-        } else {
-            // Table's like those in information_schema cannot be optimized when
-            // it contains parameters. So we fallback to original plans.
-            let schema = plan
-                .schema()
-                .clone()
-                .try_into()
-                .context(ConvertSchemaSnafu)?;
-            Ok(DescribeResult {
-                schema,
-                logical_plan: plan,
-            })
-        }
+        let schema = plan
+            .schema()
+            .clone()
+            .try_into()
+            .context(ConvertSchemaSnafu)?;
+        Ok(DescribeResult {
+            schema,
+            logical_plan: plan,
+        })
     }
 
     async fn execute(&self, plan: LogicalPlan, query_ctx: QueryContextRef) -> Result<Output> {