BatchInsert parentheses issue fix (#1327)

* BatchInsert parentheses issue #1326

* BatchInsert backticks issue tests #1329

conn_batch.go

@@ -33,7 +33,7 @@ import (
 	"github.com/ClickHouse/clickhouse-go/v2/lib/proto"
 )
 
-var insertMatch = regexp.MustCompile(`(?i)(INSERT\s+INTO\s+\S+(?:\s*\([^()]*(?:\([^()]*\)[^()]*)*\))?)(?:\s*VALUES)?`)
+var insertMatch = regexp.MustCompile(`(?i)(INSERT\s+INTO\s+[^( ]+(?:\s*\([^()]*(?:\([^()]*\)[^()]*)*\))?)(?:\s*VALUES)?`)
 var columnMatch = regexp.MustCompile(`INSERT INTO .+\s\((?P<Columns>.+)\)$`)
 
 func (c *connect) prepareBatch(ctx context.Context, query string, opts driver.PrepareBatchOptions, release func(*connect, error), acquire func(context.Context) (*connect, error)) (driver.Batch, error) {

tests/issues/1280_test.go

@@ -2,6 +2,7 @@ package issues
 
 import (
 	"context"
+	"fmt"
 	"testing"
 
 	"github.com/ClickHouse/clickhouse-go/v2"
@@ -17,9 +18,11 @@ func Test1280(t *testing.T) {
 		}, nil, &clickhouse.Compression{
 			Method: clickhouse.CompressionLZ4,
 		})
+		env, errEnv = clickhouse_tests.GetTestEnvironment(testSet)
 	)
 	ctx := context.Background()
 	require.NoError(t, err)
+	require.NoError(t, errEnv)
 
 	ddl := "CREATE TABLE values (`id` Int32, `values` Int32) Engine = Memory"
 	require.NoError(t, conn.Exec(ctx, ddl))
@@ -37,6 +40,15 @@ func Test1280(t *testing.T) {
 		{
 			input: "INSERT INTO values (`values`) values",
 		},
+		{
+			input: "INSERT INTO values(values)",
+		},
+		{
+			input: "INSERT INTO `values`(values)",
+		},
+		{
+			input: fmt.Sprintf("INSERT INTO `%s`.`values`(values)", env.Database),
+		},
 	}
 
 	for i, tc := range testCases1 {
@@ -76,6 +88,15 @@ func Test1280(t *testing.T) {
 					 values
 					  (id,values) values (1,2)`,
 		},
+		{
+			input: `INSERT INTO values(id, values) values (1,2)`,
+		},
+		{
+			input: fmt.Sprintf("INSERT INTO `%s`.`values`(id, values)", env.Database),
+		},
+		{
+			input: fmt.Sprintf("INSERT INTO `%s`.`values`", env.Database),
+		},
 	}
 
 	for i, tc := range testCases2 {