fix: MySQL TABLE statement translation (#349)

Author: fanyang01

backend/executor.go

@@ -170,9 +170,12 @@ func (b *DuckBuilder) executeQuery(ctx *sql.Context, n sql.Node, conn *stdsql.Co
 	)
 
 	// Translate the MySQL query to a DuckDB query
-	switch n.(type) {
+	switch n := n.(type) {
 	case *plan.ShowTables:
 		duckSQL = ctx.Query()
+	case *plan.ResolvedTable:
+		// SQLGlot cannot translate MySQL's `TABLE t` into DuckDB's `FROM t` - it produces `"table" AS t` instead. 
+		duckSQL = `FROM ` + catalog.ConnectIdentifiersANSI(n.Database().Name(), n.Name())
 	default:
 		duckSQL, err = transpiler.TranslateWithSQLGlot(ctx.Query())
 	}

test/bats/mysql/table_statement.bats

@@ -0,0 +1,28 @@
+#!/usr/bin/env bats
+bats_require_minimum_version 1.5.0
+
+load helper
+
+setup_file() {
+    mysql_exec_stdin <<-'EOF'
+    CREATE DATABASE table_statement_test;
+    USE table_statement_test;
+    CREATE TABLE t (id INT, name VARCHAR(255));
+    INSERT INTO t VALUES (1, 'test1'), (2, 'test2');
+EOF
+}
+
+teardown_file() {
+    mysql_exec_stdin <<-'EOF'
+    DROP DATABASE IF EXISTS table_statement_test;
+EOF
+}
+
+@test "TABLE statement should return all rows from the table" {
+    run -0 mysql_exec_stdin <<-'EOF'
+    USE table_statement_test;
+    TABLE t;
+EOF
+    [ "${lines[0]}" = "1	test1" ]
+    [ "${lines[1]}" = "2	test2" ]
+}