Parse DECIMAL and DEC aliases for NUMERIC type

Author: benesch

src/sqlparser.rs

@@ -1214,7 +1214,7 @@ impl Parser {
                     }
                 }
                 "BYTEA" => Ok(SQLType::Bytea),
-                "NUMERIC" => {
+                "NUMERIC" | "DECIMAL" | "DEC" => {
                     let (precision, scale) = self.parse_optional_precision_scale()?;
                     Ok(SQLType::Decimal(precision, scale))
                 }

tests/sqlparser_common.rs

@@ -695,6 +695,18 @@ fn parse_cast() {
         "SELECT CAST(id AS BIGINT) FROM customer",
         "SELECT CAST(id AS bigint) FROM customer",
     );
+
+    verified_stmt("SELECT CAST(id AS numeric) FROM customer");
+
+    one_statement_parses_to(
+        "SELECT CAST(id AS dec) FROM customer",
+        "SELECT CAST(id AS numeric) FROM customer",
+    );
+
+    one_statement_parses_to(
+        "SELECT CAST(id AS decimal) FROM customer",
+        "SELECT CAST(id AS numeric) FROM customer",
+    );
 }
 
 #[test]