feat: Show View

Author: wszhdshys

src/binder/mod.rs

@@ -15,9 +15,9 @@ pub mod expr;
 mod insert;
 mod select;
 mod show_table;
+mod show_view;
 mod truncate;
 mod update;
-mod show_view;
 
 use sqlparser::ast::{Ident, ObjectName, ObjectType, SetExpr, Statement};
 use std::collections::{BTreeMap, HashMap, HashSet};
@@ -415,9 +415,9 @@ impl<'a, 'b, T: Transaction, A: AsRef<[(&'static str, DataValue)]>> Binder<'a, '
                 let value = variable[0].value.clone();
                 match &value[..] {
                     "views" => self.bind_show_views()?,
-                    _ => return Err(DatabaseError::UnsupportedStmt(stmt.to_string()))
+                    _ => return Err(DatabaseError::UnsupportedStmt(stmt.to_string())),
                 }
-            },
+            }
             Statement::Copy {
                 source,
                 to,

src/execution/dql/mod.rs

@@ -10,10 +10,10 @@ pub(crate) mod limit;
 pub(crate) mod projection;
 pub(crate) mod seq_scan;
 pub(crate) mod show_table;
+pub(crate) mod show_view;
 pub(crate) mod sort;
 pub(crate) mod union;
 pub(crate) mod values;
-pub(crate) mod show_view;
 
 #[cfg(test)]
 pub(crate) mod test {

src/execution/dql/show_view.rs

@@ -1,18 +1,18 @@
+use crate::catalog::view::View;
 use crate::catalog::TableMeta;
 use crate::execution::{Executor, ReadExecutor};
 use crate::storage::{StatisticsMetaCache, TableCache, Transaction, ViewCache};
 use crate::throw;
 use crate::types::tuple::Tuple;
 use crate::types::value::{DataValue, Utf8Type};
 use sqlparser::ast::CharLengthUnits;
-use crate::catalog::view::View;
 
 pub struct ShowViews;
 
 impl<'a, T: Transaction + 'a> ReadExecutor<'a, T> for ShowViews {
     fn execute(
         self,
-        (TableCache,_,_): (&'a TableCache, &'a ViewCache, &'a StatisticsMetaCache),
+        (TableCache, _, _): (&'a TableCache, &'a ViewCache, &'a StatisticsMetaCache),
         transaction: *mut T,
     ) -> Executor<'a> {
         Box::new(

src/execution/mod.rs

@@ -32,6 +32,7 @@ use crate::execution::dql::limit::Limit;
 use crate::execution::dql::projection::Projection;
 use crate::execution::dql::seq_scan::SeqScan;
 use crate::execution::dql::show_table::ShowTables;
+use crate::execution::dql::show_view::ShowViews;
 use crate::execution::dql::sort::Sort;
 use crate::execution::dql::union::Union;
 use crate::execution::dql::values::Values;
@@ -42,7 +43,6 @@ use crate::storage::{StatisticsMetaCache, TableCache, Transaction, ViewCache};
 use crate::types::index::IndexInfo;
 use crate::types::tuple::Tuple;
 use std::ops::Coroutine;
-use crate::execution::dql::show_view::ShowViews;
 
 pub type Executor<'a> =
     Box<dyn Coroutine<Yield = Result<Tuple, DatabaseError>, Return = ()> + 'a + Unpin>;

src/storage/mod.rs

@@ -16,13 +16,13 @@ use crate::types::value::DataValue;
 use crate::types::{ColumnId, LogicalType};
 use crate::utils::lru::SharedLruCache;
 use itertools::Itertools;
+use sqlparser::keywords::NULL;
 use std::collections::Bound;
 use std::io::Cursor;
 use std::mem;
 use std::ops::SubAssign;
 use std::sync::Arc;
 use std::vec::IntoIter;
-use sqlparser::keywords::NULL;
 use ulid::Generator;
 
 pub(crate) type StatisticsMetaCache = SharedLruCache<(TableName, IndexId), StatisticsMeta>;