Add support for SRID column attribute for GEOMETRY types

Author: atavakoliyext

ast.go

@@ -1388,6 +1388,8 @@ type ColumnType struct {
 	Unsigned BoolVal
 	Zerofill BoolVal
 	Scale    *SQLVal
+	// SRID is an optional spatial reference identifier for spatial column types.
+	SRID *SQLVal
 
 	// Text field options
 	Charset string
@@ -1434,6 +1436,9 @@ func (ct *ColumnType) Format(buf *TrackedBuffer) {
 	if ct.Zerofill {
 		opts = append(opts, keywordStrings[ZEROFILL])
 	}
+	if ct.SRID != nil {
+		opts = append(opts, keywordStrings[SRID], String(ct.SRID))
+	}
 	if ct.Charset != "" {
 		opts = append(opts, keywordStrings[CHARACTER], keywordStrings[SET], ct.Charset)
 	}

parse_test.go

@@ -2504,6 +2504,19 @@ func TestCreateTable(t *testing.T) {
 		}
 	}
 
+	validSpatialSRIDDDL := []string{
+		"create table tbl_geo_a (col_a point srid 4326 not null, spatial index idx_geo_a (col_a))",
+		"create table tbl_geo_b (col_a geometry srid 0, col_b linestring srid 3857, col_c multipolygon)",
+		"alter table tbl_geo_c add column col_a point srid 4326",
+		"alter table tbl_geo_d modify column col_a multipoint srid 4326 not null",
+	}
+	for _, sql := range validSpatialSRIDDDL {
+		tree, err := Parse(sql)
+		if tree == nil || err != nil {
+			t.Errorf("Parse unexpectedly rejected spatial SRID DDL %s: %v", sql, err)
+		}
+	}
+
 	sql := "create table t garbage"
 	if _, err := Parse(sql); err == nil {
 		t.Errorf("Parse unexpectedly accepted input %s", sql)
@@ -2853,6 +2866,19 @@ func TestCreateTable(t *testing.T) {
 		}
 	}
 
+	invalidSpatialSRIDSQL := []string{
+		"create table tbl_geo_bad1 (col_a point srid)",
+		"create table tbl_geo_bad2 (col_a point srid '4326')",
+		"alter table tbl_geo_bad3 add column col_a linestring srid",
+		"alter table tbl_geo_bad4 modify column col_a geometry srid ident_srid",
+	}
+	for _, sql := range invalidSpatialSRIDSQL {
+		tree, err := Parse(sql)
+		if tree != nil || err == nil {
+			t.Errorf("Parse unexpectedly accepted input %s", sql)
+		}
+	}
+
 	invalidColumnAttributeDupSQL := []string{
 		"alter table tbl_attr_bad1 add column col_a int default 1 default 2",
 		"alter table tbl_attr_bad2 add column col_a int null not null",