fix: correctly open table when distributed datanode restart (#576)

Co-authored-by: luofucong <luofucong@greptime.com>

src/api/src/column_def.rs

@@ -0,0 +1,38 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+use datatypes::schema::{ColumnDefaultConstraint, ColumnSchema};
+use snafu::ResultExt;
+
+use crate::error::{self, Result};
+use crate::helper::ColumnDataTypeWrapper;
+use crate::v1::ColumnDef;
+
+impl ColumnDef {
+    pub fn try_as_column_schema(&self) -> Result<ColumnSchema> {
+        let data_type = ColumnDataTypeWrapper::try_new(self.datatype)?;
+
+        let constraint = match &self.default_constraint {
+            None => None,
+            Some(v) => Some(
+                ColumnDefaultConstraint::try_from(&v[..])
+                    .context(error::ConvertColumnDefaultConstraintSnafu { column: &self.name })?,
+            ),
+        };
+
+        ColumnSchema::new(&self.name, data_type.into(), self.is_nullable)
+            .with_default_constraint(constraint)
+            .context(error::InvalidColumnDefaultConstraintSnafu { column: &self.name })
+    }
+}

src/api/src/error.rs

@@ -33,6 +33,28 @@ pub enum Error {
         from: ConcreteDataType,
         backtrace: Backtrace,
     },
+
+    #[snafu(display(
+        "Failed to convert column default constraint, column: {}, source: {}",
+        column,
+        source
+    ))]
+    ConvertColumnDefaultConstraint {
+        column: String,
+        #[snafu(backtrace)]
+        source: datatypes::error::Error,
+    },
+
+    #[snafu(display(
+        "Invalid column default constraint, column: {}, source: {}",
+        column,
+        source
+    ))]
+    InvalidColumnDefaultConstraint {
+        column: String,
+        #[snafu(backtrace)]
+        source: datatypes::error::Error,
+    },
 }
 
 impl ErrorExt for Error {
@@ -40,6 +62,8 @@ impl ErrorExt for Error {
         match self {
             Error::UnknownColumnDataType { .. } => StatusCode::InvalidArguments,
             Error::IntoColumnDataType { .. } => StatusCode::Unexpected,
+            Error::ConvertColumnDefaultConstraint { source, .. }
+            | Error::InvalidColumnDefaultConstraint { source, .. } => source.status_code(),
         }
     }
     fn backtrace_opt(&self) -> Option<&Backtrace> {

src/api/src/lib.rs

@@ -12,6 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+mod column_def;
 pub mod error;
 pub mod helper;
 pub mod prometheus;