diff --git a/ast/meta.go b/ast/meta.go
index 48323ffd86c1c75c9adb8ea281aeb71770e91c77..9015087ea713d8e666df2df300a6768e2eb5bb2a 100644
--- a/ast/meta.go
+++ b/ast/meta.go
@@ -297,8 +297,11 @@ func FindEQColsInWhere(node sqlparser.SQLNode) []*common.Column {
 				}
 
 			default:
-				if _, ok := eqOperators[node.Operator]; ok {
-					newCols = FindColumn(node)
+				switch node.Left.(type) {
+				case *sqlparser.ColName:
+					if _, ok := eqOperators[node.Operator]; ok {
+						newCols = FindColumn(node)
+					}
 				}
 			}
 
diff --git a/ast/meta_test.go b/ast/meta_test.go
index cc685b2202555564a0fdef32f015d635dc50eafa..653491d16919b8fd2cd28c441b31ddcb517b1e9b 100644
--- a/ast/meta_test.go
+++ b/ast/meta_test.go
@@ -85,7 +85,10 @@ func TestGetParseTableWithStmt(t *testing.T) {
 
 func TestFindCondition(t *testing.T) {
 	common.Log.Debug("Entering function: %s", common.GetFunctionName())
-	for _, sql := range common.TestSQLs {
+	sqls := []string{
+		`SELECT * FROM film WHERE length % 20 = 4;`,
+	}
+	for _, sql := range append(sqls, common.TestSQLs...) {
 		fmt.Println(sql)
 		stmt, err := sqlparser.Parse(sql)
 		// pretty.Println(stmt)
diff --git a/doc/install.md b/doc/install.md
index a649dd309509b9bb53831cb950727fe375e8a1ea..c808263eb47de5639d52b9dfcb14737ea63a1957 100644
--- a/doc/install.md
+++ b/doc/install.md
@@ -14,7 +14,7 @@ chmod a+x soar
 
 一般依赖
 
-* Go 1.10+
+* Go 1.12+
 * git
 
 高级依赖（仅面向开发人员）