feat: add duckdb "INSTALL" and "LOAD" (apache#1127)

Co-authored-by: Andrew Lamb <andrew@nerdnetworks.org>

Author: universalmind303

src/ast/mod.rs

@@ -1537,6 +1537,20 @@ pub enum Statement {
         /// Only for mysql
         priority: Option<MysqlInsertPriority>,
     },
+    /// ```sql
+    /// INSTALL
+    /// ```
+    Install {
+        /// Only for DuckDB
+        extension_name: Ident,
+    },
+    /// ```sql
+    /// LOAD
+    /// ```
+    Load {
+        /// Only for DuckDB
+        extension_name: Ident,
+    },
     // TODO: Support ROW FORMAT
     Directory {
         overwrite: bool,
@@ -2637,6 +2651,13 @@ impl fmt::Display for Statement {
 
                 Ok(())
             }
+            Statement::Install {
+                extension_name: name,
+            } => write!(f, "INSTALL {name}"),
+
+            Statement::Load {
+                extension_name: name,
+            } => write!(f, "LOAD {name}"),
 
             Statement::Call(function) => write!(f, "CALL {function}"),
 

src/keywords.rs

@@ -351,6 +351,7 @@ define_keywords!(
     INPUTFORMAT,
     INSENSITIVE,
     INSERT,
+    INSTALL,
     INT,
     INT2,
     INT4,
@@ -390,6 +391,7 @@ define_keywords!(
     LIMIT,
     LISTAGG,
     LN,
+    LOAD,
     LOCAL,
     LOCALTIME,
     LOCALTIMESTAMP,

src/parser/mod.rs

@@ -516,6 +516,15 @@ impl<'a> Parser<'a> {
                 Keyword::MERGE => Ok(self.parse_merge()?),
                 // `PRAGMA` is sqlite specific https://www.sqlite.org/pragma.html
                 Keyword::PRAGMA => Ok(self.parse_pragma()?),
+                // `INSTALL` is duckdb specific https://duckdb.org/docs/extensions/overview
+                Keyword::INSTALL if dialect_of!(self is DuckDbDialect | GenericDialect) => {
+                    Ok(self.parse_install()?)
+                }
+                // `LOAD` is duckdb specific https://duckdb.org/docs/extensions/overview
+                Keyword::LOAD if dialect_of!(self is DuckDbDialect | GenericDialect) => {
+                    Ok(self.parse_load()?)
+                }
+
                 _ => self.expected("an SQL statement", next_token),
             },
             Token::LParen => {
@@ -8791,6 +8800,19 @@ impl<'a> Parser<'a> {
         }
     }
 
+    /// `INSTALL [extension_name]`
+    pub fn parse_install(&mut self) -> Result<Statement, ParserError> {
+        let extension_name = self.parse_identifier(false)?;
+
+        Ok(Statement::Install { extension_name })
+    }
+
+    /// `LOAD [extension_name]`
+    pub fn parse_load(&mut self) -> Result<Statement, ParserError> {
+        let extension_name = self.parse_identifier(false)?;
+        Ok(Statement::Load { extension_name })
+    }
+
     /// ```sql
     /// CREATE [ { TEMPORARY | TEMP } ] SEQUENCE [ IF NOT EXISTS ] <sequence_name>
     /// ```

tests/sqlparser_duckdb.rs

@@ -216,3 +216,31 @@ fn test_select_union_by_name() {
         assert_eq!(ast.body, expected);
     }
 }
+
+#[test]
+fn test_duckdb_install() {
+    let stmt = duckdb().verified_stmt("INSTALL tpch");
+    assert_eq!(
+        stmt,
+        Statement::Install {
+            extension_name: Ident {
+                value: "tpch".to_string(),
+                quote_style: None
+            }
+        }
+    );
+}
+
+#[test]
+fn test_duckdb_load_extension() {
+    let stmt = duckdb().verified_stmt("LOAD my_extension");
+    assert_eq!(
+        Statement::Load {
+            extension_name: Ident {
+                value: "my_extension".to_string(),
+                quote_style: None
+            }
+        },
+        stmt
+    );
+}