refactor: add build method in condition (#170)

Signed-off-by: ZhangJian He <[email protected]>

Author: ZhangJian He

opengemini/query_builder.go

@@ -71,7 +71,7 @@ func (q *QueryBuilder) Build() *Query {
 			if i > 0 {
 				commandBuilder.WriteString(", ")
 			}
-			commandBuilder.WriteString(q.buildExpression(expr))
+			commandBuilder.WriteString(expr.build())
 		}
 	} else {
 		commandBuilder.WriteString("SELECT *")
@@ -90,7 +90,7 @@ func (q *QueryBuilder) Build() *Query {
 	// Build the WHERE part
 	if q.where != nil {
 		commandBuilder.WriteString(" WHERE ")
-		commandBuilder.WriteString(q.buildCondition(q.where))
+		commandBuilder.WriteString(q.where.build())
 	}
 
 	// Build the GROUP BY part
@@ -100,7 +100,7 @@ func (q *QueryBuilder) Build() *Query {
 			if i > 0 {
 				commandBuilder.WriteString(", ")
 			}
-			commandBuilder.WriteString(q.buildExpression(expr))
+			commandBuilder.WriteString(expr.build())
 		}
 	}
 
@@ -130,22 +130,3 @@ func (q *QueryBuilder) Build() *Query {
 		Command: commandBuilder.String(),
 	}
 }
-
-func (q *QueryBuilder) buildExpression(expr Expression) string {
-	return expr.build()
-}
-
-func (q *QueryBuilder) buildCondition(cond Condition) string {
-	switch c := cond.(type) {
-	case *ComparisonCondition:
-		return fmt.Sprintf(`"%s" %s '%v'`, c.Column, c.Operator, c.Value)
-	case *CompositeCondition:
-		var parts []string
-		for _, condition := range c.Conditions {
-			parts = append(parts, q.buildCondition(condition))
-		}
-		return fmt.Sprintf("(%s)", strings.Join(parts, fmt.Sprintf(" %s ", c.LogicalOperator)))
-	default:
-		return ""
-	}
-}

opengemini/query_builder_test.go

@@ -61,7 +61,7 @@ func TestQueryBuilderSelectWhereCondition(t *testing.T) {
 
 	query := qb.From("h2o_feet").Where(condition).Build()
 
-	expectedQuery := `SELECT * FROM "h2o_feet" WHERE "water_level" > '8'`
+	expectedQuery := `SELECT * FROM "h2o_feet" WHERE "water_level" > 8`
 
 	require.Equal(t, expectedQuery, query.Command)
 }
@@ -79,7 +79,7 @@ func TestQueryBuilderSelectWithComplexWhereCondition(t *testing.T) {
 
 	query := qb.Select(NewFieldExpression("water_level")).From("h2o_feet").Where(finalCondition).Build()
 
-	expectedQuery := `SELECT "water_level" FROM "h2o_feet" WHERE ("location" <> 'santa_monica' AND ("water_level" < '-0.57' OR "water_level" > '9.95'))`
+	expectedQuery := `SELECT "water_level" FROM "h2o_feet" WHERE ("location" <> 'santa_monica' AND ("water_level" < -0.57 OR "water_level" > 9.95))`
 
 	require.Equal(t, expectedQuery, query.Command)
 }

opengemini/query_condition.go

@@ -1,13 +1,29 @@
 package opengemini
 
-type Condition interface{}
+import (
+	"fmt"
+	"strings"
+)
+
+type Condition interface {
+	build() string
+}
 
 type ComparisonCondition struct {
 	Column   string
 	Operator ComparisonOperator
 	Value    interface{}
 }
 
+func (c *ComparisonCondition) build() string {
+	switch c.Value.(type) {
+	case string:
+		return fmt.Sprintf(`"%s" %s '%v'`, c.Column, c.Operator, c.Value)
+	default:
+		return fmt.Sprintf(`"%s" %s %v`, c.Column, c.Operator, c.Value)
+	}
+}
+
 func NewComparisonCondition(column string, operator ComparisonOperator, value interface{}) *ComparisonCondition {
 	return &ComparisonCondition{
 		Column:   column,
@@ -21,6 +37,14 @@ type CompositeCondition struct {
 	Conditions      []Condition
 }
 
+func (c *CompositeCondition) build() string {
+	var parts []string
+	for _, condition := range c.Conditions {
+		parts = append(parts, condition.build())
+	}
+	return fmt.Sprintf("(%s)", strings.Join(parts, fmt.Sprintf(" %s ", c.LogicalOperator)))
+}
+
 func NewCompositeCondition(logicalOperator LogicalOperator, conditions ...Condition) *CompositeCondition {
 	return &CompositeCondition{
 		LogicalOperator: logicalOperator,