Support DOUBLE data types with precision for Mysql (#1611)

Author: artorias1024

src/ast/data_type.rs

@@ -254,7 +254,7 @@ pub enum DataType {
     /// [postgresql]: https://www.postgresql.org/docs/15/datatype.html
     Float8,
     /// Double
-    Double,
+    Double(ExactNumberInfo),
     /// Double PRECISION e.g. [standard], [postgresql]
     ///
     /// [standard]: https://jakewheat.github.io/sql-overview/sql-2016-foundation-grammar.html#approximate-numeric-type
@@ -508,7 +508,7 @@ impl fmt::Display for DataType {
             DataType::Float4 => write!(f, "FLOAT4"),
             DataType::Float32 => write!(f, "Float32"),
             DataType::Float64 => write!(f, "FLOAT64"),
-            DataType::Double => write!(f, "DOUBLE"),
+            DataType::Double(info) => write!(f, "DOUBLE{info}"),
             DataType::Float8 => write!(f, "FLOAT8"),
             DataType::DoublePrecision => write!(f, "DOUBLE PRECISION"),
             DataType::Bool => write!(f, "BOOL"),

src/parser/mod.rs

@@ -8115,7 +8115,9 @@ impl<'a> Parser<'a> {
                     if self.parse_keyword(Keyword::PRECISION) {
                         Ok(DataType::DoublePrecision)
                     } else {
-                        Ok(DataType::Double)
+                        Ok(DataType::Double(
+                            self.parse_exact_number_optional_precision_scale()?,
+                        ))
                     }
                 }
                 Keyword::TINYINT => {

tests/sqlparser_common.rs

@@ -3009,7 +3009,7 @@ fn parse_create_table() {
                     },
                     ColumnDef {
                         name: "lat".into(),
-                        data_type: DataType::Double,
+                        data_type: DataType::Double(ExactNumberInfo::None),
                         collation: None,
                         options: vec![ColumnOptionDef {
                             name: None,
@@ -3018,7 +3018,7 @@ fn parse_create_table() {
                     },
                     ColumnDef {
                         name: "lng".into(),
-                        data_type: DataType::Double,
+                        data_type: DataType::Double(ExactNumberInfo::None),
                         collation: None,
                         options: vec![],
                     },
@@ -3198,7 +3198,7 @@ fn parse_create_table_with_constraint_characteristics() {
                     },
                     ColumnDef {
                         name: "lat".into(),
-                        data_type: DataType::Double,
+                        data_type: DataType::Double(ExactNumberInfo::None),
                         collation: None,
                         options: vec![ColumnOptionDef {
                             name: None,
@@ -3207,7 +3207,7 @@ fn parse_create_table_with_constraint_characteristics() {
                     },
                     ColumnDef {
                         name: "lng".into(),
-                        data_type: DataType::Double,
+                        data_type: DataType::Double(ExactNumberInfo::None),
                         collation: None,
                         options: vec![],
                     },
@@ -3838,7 +3838,7 @@ fn parse_create_external_table() {
                     },
                     ColumnDef {
                         name: "lat".into(),
-                        data_type: DataType::Double,
+                        data_type: DataType::Double(ExactNumberInfo::None),
                         collation: None,
                         options: vec![ColumnOptionDef {
                             name: None,
@@ -3847,7 +3847,7 @@ fn parse_create_external_table() {
                     },
                     ColumnDef {
                         name: "lng".into(),
-                        data_type: DataType::Double,
+                        data_type: DataType::Double(ExactNumberInfo::None),
                         collation: None,
                         options: vec![],
                     },

tests/sqlparser_mysql.rs

@@ -3022,3 +3022,13 @@ fn parse_longblob_type() {
 fn parse_begin_without_transaction() {
     mysql().verified_stmt("BEGIN");
 }
+
+#[test]
+fn parse_double_precision() {
+    mysql().verified_stmt("CREATE TABLE foo (bar DOUBLE)");
+    mysql().verified_stmt("CREATE TABLE foo (bar DOUBLE(11,0))");
+    mysql().one_statement_parses_to(
+        "CREATE TABLE foo (bar DOUBLE(11, 0))",
+        "CREATE TABLE foo (bar DOUBLE(11,0))",
+    );
+}