Implement UPPER/LOWER; minor Fixes

parsers/models.go

@@ -89,6 +89,8 @@ const (
 	FunctionCallIndexOf      FunctionCallType = "IndexOf"
 	FunctionCallToString     FunctionCallType = "ToString"
 	FunctionCallIn           FunctionCallType = "In"
+	FunctionCallUpper        FunctionCallType = "Upper"
+	FunctionCallLower        FunctionCallType = "Lower"
 )
 
 type FunctionCall struct {

parsers/nosql/nosql.peg

@@ -312,6 +312,16 @@ StringFunctions <- StringEqualsExpression
     / ToStringExpression
     / ConcatExpression
     / ThreeArgumentStringFunctionExpression
+    / UpperExpression
+    / LowerExpression
+
+UpperExpression <- "UPPER"i ws "(" ex:SelectItem ")" {
+    return parsers.FunctionCall{Type: parsers.FunctionCallUpper, Arguments: []interface{}{ex}}, nil
+}
+
+LowerExpression <- "LOWER"i ws "(" ex:SelectItem ")" {
+    return parsers.FunctionCall{Type: parsers.FunctionCallLower, Arguments: []interface{}{ex}}, nil
+}
 
 StringEqualsExpression <- StringEquals ws "(" ws ex1:SelectItem ws "," ws ex2:SelectItem ws ignoreCase:("," ws boolean:SelectItem { return boolean, nil })? ")" {
     return parsers.FunctionCall{Type: parsers.FunctionCallStringEquals, Arguments: []interface{}{ex1, ex2, ignoreCase}}, nil

parsers/nosql/nosql_string_functions_test.go

@@ -288,4 +288,52 @@ func Test_Execute_StringFunctions(t *testing.T) {
 			},
 		)
 	})
+
+	t.Run("Should parse function UPPER()", func(t *testing.T) {
+		testQueryParse(
+			t,
+			`SELECT UPPER(c.id) FROM c`,
+			parsers.SelectStmt{
+				SelectItems: []parsers.SelectItem{
+					{
+						Type: parsers.SelectItemTypeFunctionCall,
+						Value: parsers.FunctionCall{
+							Type: parsers.FunctionCallUpper,
+							Arguments: []interface{}{
+								parsers.SelectItem{
+									Path: []string{"c", "id"},
+									Type: parsers.SelectItemTypeField,
+								},
+							},
+						},
+					},
+				},
+				Table: parsers.Table{Value: "c"},
+			},
+		)
+	})
+
+	t.Run("Should parse function LOWER()", func(t *testing.T) {
+		testQueryParse(
+			t,
+			`SELECT LOWER(c.id) FROM c`,
+			parsers.SelectStmt{
+				SelectItems: []parsers.SelectItem{
+					{
+						Type: parsers.SelectItemTypeFunctionCall,
+						Value: parsers.FunctionCall{
+							Type: parsers.FunctionCallLower,
+							Arguments: []interface{}{
+								parsers.SelectItem{
+									Path: []string{"c", "id"},
+									Type: parsers.SelectItemTypeField,
+								},
+							},
+						},
+					},
+				},
+				Table: parsers.Table{Value: "c"},
+			},
+		)
+	})
 }