fixes

SQL_FEATURE_PLAN.md

@@ -303,7 +303,10 @@ SQL Query Flow:
 ## Success Metrics
 
 *   **Feature Completeness:** Support for all specified DDL/DML operations
-*   **Performance:** Query latency < 100ms for simple selects, < 1s for complex joins
+*   **Performance:** 
+    *   **Simple SELECT queries**: < 100ms latency for single-table queries with up to 3 WHERE predicates on ≤ 100K records
+    *   **Complex queries**: < 1s latency for queries involving aggregations (COUNT, SUM, MAX, MIN) on ≤ 1M records
+    *   **Time-range queries**: < 500ms for timestamp-based filtering on ≤ 500K records within 24-hour windows
 *   **Scalability:** Handle topics with millions of messages efficiently
 *   **Reliability:** 99.9% success rate for valid SQL operations
 *   **Usability:** Intuitive SQL interface matching standard database expectations

weed/command/db.go

@@ -10,7 +10,6 @@ import (
 	"syscall"
 	"time"
 
-	"github.com/seaweedfs/seaweedfs/weed/glog"
 	"github.com/seaweedfs/seaweedfs/weed/server/postgres"
 	"github.com/seaweedfs/seaweedfs/weed/util"
 )
@@ -363,7 +362,7 @@ func validatePortNumber(port int) error {
 		return fmt.Errorf("port number must be between 1 and 65535, got %d", port)
 	}
 	if port < 1024 {
-		glog.Warningf("port number %d may require root privileges", port)
+		fmt.Fprintf(os.Stderr, "Warning: port number %d may require root privileges\n", port)
 	}
 	return nil
 }

weed/command/sql.go

@@ -36,14 +36,12 @@ func splitSQLStatements(query string) []string {
 
 		// Handle single-line comments (-- comment)
 		if char == '-' && i+1 < len(runes) && runes[i+1] == '-' {
-			// Include the entire comment in the current statement
+			// Skip the entire comment without including it in any statement
 			for i < len(runes) && runes[i] != '\n' && runes[i] != '\r' {
-				current.WriteRune(runes[i])
 				i++
 			}
-			// Include the newline if present
+			// Skip the newline if present
 			if i < len(runes) {
-				current.WriteRune(runes[i])
 				i++
 			}
 			continue
@@ -51,20 +49,15 @@ func splitSQLStatements(query string) []string {
 
 				// Handle multi-line comments (/* comment */)
 		if char == '/' && i+1 < len(runes) && runes[i+1] == '*' {
-			current.WriteRune(char) // Include the /*
+			// Skip the /* opening
 			i++
-			if i < len(runes) {
-				current.WriteRune(runes[i])
 			i++
-			}
 			
-			// Skip to end of comment or end of input
+			// Skip to end of comment or end of input without including content
 			for i < len(runes) {
-				current.WriteRune(runes[i])
 				if runes[i] == '*' && i+1 < len(runes) && runes[i+1] == '/' {
-					i++
+					i++ // Skip the *
-					current.WriteRune(runes[i]) // Include the */
+					i++ // Skip the /
-					i++
 					break
 				}
 				i++

weed/command/sql_test.go

@@ -44,22 +44,22 @@ func TestSplitSQLStatements(t *testing.T) {
 		{
 			name:     "Single line comment",
 			input:    "SELECT * FROM users; -- This is a comment\nSELECT * FROM orders;",
-			expected: []string{"SELECT * FROM users", "-- This is a comment\nSELECT * FROM orders"},
+			expected: []string{"SELECT * FROM users", "SELECT * FROM orders"},
 		},
 		{
 			name:     "Single line comment with semicolon",
 			input:    "SELECT * FROM users; -- Comment with; semicolon\nSELECT * FROM orders;",
-			expected: []string{"SELECT * FROM users", "-- Comment with; semicolon\nSELECT * FROM orders"},
+			expected: []string{"SELECT * FROM users", "SELECT * FROM orders"},
 		},
 		{
 			name:     "Multi-line comment",
 			input:    "SELECT * FROM users; /* Multi-line\ncomment */ SELECT * FROM orders;",
-			expected: []string{"SELECT * FROM users", "/* Multi-line\ncomment */ SELECT * FROM orders"},
+			expected: []string{"SELECT * FROM users", "SELECT * FROM orders"},
 		},
 		{
 			name:     "Multi-line comment with semicolon",
 			input:    "SELECT * FROM users; /* Comment with; semicolon */ SELECT * FROM orders;",
-			expected: []string{"SELECT * FROM users", "/* Comment with; semicolon */ SELECT * FROM orders"},
+			expected: []string{"SELECT * FROM users", "SELECT * FROM orders"},
 		},
 		{
 			name: "Complex mixed case",
@@ -68,9 +68,7 @@ func TestSplitSQLStatements(t *testing.T) {
 			INSERT INTO users VALUES ('name''s value', "id""field");`,
 			expected: []string{
 				`SELECT 'test;string', "quoted;id" FROM users`,
-				`-- Comment; here
+				`INSERT INTO users VALUES ('name''s value', "id""field")`,
-			/* Another; comment */ 
-			INSERT INTO users VALUES ('name''s value', "id""field")`,
 			},
 		},
 		{
@@ -119,7 +117,7 @@ func TestSplitSQLStatements_EdgeCases(t *testing.T) {
 		{
 			name:     "Nested comments are not supported but handled gracefully",
 			input:    "SELECT * FROM users; /* Outer /* inner */ comment */ SELECT * FROM orders;",
-			expected: []string{"SELECT * FROM users", "/* Outer /* inner */ comment */ SELECT * FROM orders"},
+			expected: []string{"SELECT * FROM users", "comment */ SELECT * FROM orders"},
 		},
 		{
 			name:     "Unterminated string (malformed SQL)",
@@ -129,7 +127,7 @@ func TestSplitSQLStatements_EdgeCases(t *testing.T) {
 		{
 			name:     "Unterminated comment (malformed SQL)",
 			input:    "SELECT * FROM users; /* unterminated comment",
-			expected: []string{"SELECT * FROM users", "/* unterminated comment"},
+			expected: []string{"SELECT * FROM users"},
 		},
 		{
 			name:     "Multiple semicolons in quotes",