I fixed the error but now i'm receiving this error:
Program received signal SIGSEGV, Segmentation fault.
0x0000000000626412 in php_trim (c=0x7ffff7fe0a50 "restaurant_mailQueue.executionTime", len=34, what=<optimized out>, what_len=<optimized out>, return_value=<optimized out>, mode=<optimized out>)
at /build/php5-6hC5Fj/php5-5.6.20+dfsg/ext/standard/string.c:831
831 in /build/php5-6hC5Fj/php5-5.6.20+dfsg/ext/standard/string.c
Backtrace:
#0 0x0000000000626412 in php_trim (c=0x7ffff7fdc720 "restaurant_mailQueue.executionTime", len=34, what=<optimized out>, what_len=<optimized out>, return_value=<optimized out>, mode=<optimized out>)
at /build/php5-6hC5Fj/php5-5.6.20+dfsg/ext/standard/string.c:831
#1 0x00007fffed200a68 in zephir_fast_trim () from /usr/lib/php5/20131226/phalcon.so
#2 0x00007fffed405b0d in zim_Phalcon_Db_Dialect_escape () from /usr/lib/php5/20131226/phalcon.so
#3 0x00000000006cb4ab in dtrace_execute_internal (execute_data_ptr=<optimized out>, fci=<optimized out>, return_value_used=<optimized out>) at /build/php5-6hC5Fj/php5-5.6.20+dfsg/Zend/zend_dtrace.c:97
#4 0x00007fffed20b0e1 in zephir_call_user_function () from /usr/lib/php5/20131226/phalcon.so
#5 0x00007fffed221a2f in zephir_call_class_method_aparams () from /usr/lib/php5/20131226/phalcon.so
#6 0x00007fffed2da6d6 in zim_Phalcon_Db_Dialect_prepareQualified () from /usr/lib/php5/20131226/phalcon.so
#7 0x00000000006cb4ab in dtrace_execute_internal (execute_data_ptr=<optimized out>, fci=<optimized out>, return_value_used=<optimized out>) at /build/php5-6hC5Fj/php5-5.6.20+dfsg/Zend/zend_dtrace.c:97
#8 0x00007fffed20b0e1 in zephir_call_user_function () from /usr/lib/php5/20131226/phalcon.so
#9 0x00007fffed221a2f in zephir_call_class_method_aparams () from /usr/lib/php5/20131226/phalcon.so
#10 0x00007fffed26dbd2 in zim_Phalcon_Db_Dialect_getSqlExpressionQualified () from /usr/lib/php5/20131226/phalcon.so
#11 0x00000000006cb4ab in dtrace_execute_internal (execute_data_ptr=<optimized out>, fci=<optimized out>, return_value_used=<optimized out>) at /build/php5-6hC5Fj/php5-5.6.20+dfsg/Zend/zend_dtrace.c:97
#12 0x00007fffed20b0e1 in zephir_call_user_function () from /usr/lib/php5/20131226/phalcon.so
#13 0x00007fffed221a2f in zephir_call_class_method_aparams () from /usr/lib/php5/20131226/phalcon.so
#14 0x00007fffed307566 in zim_Phalcon_Db_Dialect_getSqlExpression () from /usr/lib/php5/20131226/phalcon.so
#15 0x00000000006cb4ab in dtrace_execute_internal (execute_data_ptr=<optimized out>, fci=<optimized out>, return_value_used=<optimized out>) at /build/php5-6hC5Fj/php5-5.6.20+dfsg/Zend/zend_dtrace.c:97
#16 0x00007fffed20b0e1 in zephir_call_user_function () from /usr/lib/php5/20131226/phalcon.so
#17 0x00007fffed221a2f in zephir_call_class_method_aparams () from /usr/lib/php5/20131226/phalcon.so
#18 0x00007fffed2d5dbb in zim_Phalcon_Db_Dialect_getSqlExpressionBinaryOperations () from /usr/lib/php5/20131226/phalcon.so
#19 0x00000000006cb4ab in dtrace_execute_internal (execute_data_ptr=<optimized out>, fci=<optimized out>, return_value_used=<optimized out>) at /build/php5-6hC5Fj/php5-5.6.20+dfsg/Zend/zend_dtrace.c:97
#20 0x00007fffed20b0e1 in zephir_call_user_function () from /usr/lib/php5/20131226/phalcon.so
#21 0x00007fffed221a2f in zephir_call_class_method_aparams () from /usr/lib/php5/20131226/phalcon.so
#22 0x00007fffed307d13 in zim_Phalcon_Db_Dialect_getSqlExpression () from /usr/lib/php5/20131226/phalcon.so
#23 0x00000000006cb4ab in dtrace_execute_internal (execute_data_ptr=<optimized out>, fci=<optimized out>, return_value_used=<optimized out>) at /build/php5-6hC5Fj/php5-5.6.20+dfsg/Zend/zend_dtrace.c:97
#24 0x00007fffed20b0e1 in zephir_call_user_function () from /usr/lib/php5/20131226/phalcon.so
#25 0x00007fffed221a2f in zephir_call_class_method_aparams () from /usr/lib/php5/20131226/phalcon.so
#26 0x00007fffed2d5dbb in zim_Phalcon_Db_Dialect_getSqlExpressionBinaryOperations () from /usr/lib/php5/20131226/phalcon.so
#27 0x00000000006cb4ab in dtrace_execute_internal (execute_data_ptr=<optimized out>, fci=<optimized out>, return_value_used=<optimized out>) at /build/php5-6hC5Fj/php5-5.6.20+dfsg/Zend/zend_dtrace.c:97
#28 0x00007fffed20b0e1 in zephir_call_user_function () from /usr/lib/php5/20131226/phalcon.so
#29 0x00007fffed221a2f in zephir_call_class_method_aparams () from /usr/lib/php5/20131226/phalcon.so
#30 0x00007fffed307d13 in zim_Phalcon_Db_Dialect_getSqlExpression () from /usr/lib/php5/20131226/phalcon.so
#31 0x00000000006cb4ab in dtrace_execute_internal (execute_data_ptr=<optimized out>, fci=<optimized out>, return_value_used=<optimized out>) at /build/php5-6hC5Fj/php5-5.6.20+dfsg/Zend/zend_dtrace.c:97
#32 0x00007fffed20b0e1 in zephir_call_user_function () from /usr/lib/php5/20131226/phalcon.so
#33 0x00007fffed221a2f in zephir_call_class_method_aparams () from /usr/lib/php5/20131226/phalcon.so
#34 0x00007fffed2d5cfa in zim_Phalcon_Db_Dialect_getSqlExpressionBinaryOperations () from /usr/lib/php5/20131226/phalcon.so
#35 0x00000000006cb4ab in dtrace_execute_internal (execute_data_ptr=<optimized out>, fci=<optimized out>, return_value_used=<optimized out>) at /build/php5-6hC5Fj/php5-5.6.20+dfsg/Zend/zend_dtrace.c:97
#36 0x00007fffed20b0e1 in zephir_call_user_function () from /usr/lib/php5/20131226/phalcon.so