Sandbox

SELECT 
  SQL_CALC_FOUND_ROWS (
    CASE WHEN products.parent_product_id <> 0 THEN products.parent_product_id ELSE products.product_id END
  ) AS product_id, 
  descr1.product as product, 
  companies.company as company_name, 
  companies.ec_rfq_whatsapp_number, 
  companies.ec_rfq_bht, 
  companies.ec_rfq_phone_number, 
  companies.ec_rfq_bhf, 
  GROUP_CONCAT(
    products.product_id 
    ORDER BY 
      products.parent_product_id ASC, 
      products.product_id ASC
  ) AS product_ids, 
  GROUP_CONCAT(
    products.product_type 
    ORDER BY 
      products.parent_product_id ASC, 
      products.product_id ASC
  ) AS product_types, 
  GROUP_CONCAT(
    products.parent_product_id 
    ORDER BY 
      products.parent_product_id ASC, 
      products.product_id ASC
  ) AS parent_product_ids, 
  products.product_type, 
  products.parent_product_id, 
  cscart_ec_table_booking_system.booking_type as booking_type 
FROM 
  cscart_products as products 
  LEFT JOIN cscart_product_descriptions as descr1 ON descr1.product_id = products.product_id 
  AND descr1.lang_code = 'en' 
  LEFT JOIN cscart_product_prices as prices ON prices.product_id = products.product_id 
  AND prices.lower_limit = 1 
  LEFT JOIN cscart_companies AS companies ON companies.company_id = products.company_id 
  INNER JOIN cscart_products_categories as products_categories ON products_categories.product_id = products.product_id 
  INNER JOIN cscart_categories ON cscart_categories.category_id = products_categories.category_id 
  AND (
    cscart_categories.usergroup_ids = '' 
    OR FIND_IN_SET(
      0, cscart_categories.usergroup_ids
    ) 
    OR FIND_IN_SET(
      1, cscart_categories.usergroup_ids
    )
  ) 
  AND cscart_categories.status IN ('A', 'H') 
  AND cscart_categories.storefront_id IN (0, 1) 
  LEFT JOIN cscart_ec_table_booking_system ON cscart_ec_table_booking_system.product_id = products.product_id 
  LEFT JOIN cscart_product_popularity as popularity ON popularity.product_id = products.product_id 
WHERE 
  1 
  AND cscart_categories.category_id IN (
    3532, 
    3535, 
    3539, 
    3549, 
    3632, 
    3641, 
    3647, 
    3652, 
    3655, 
    3663, 
    3671, 
    3856, 
    3865, 
    3882, 
    3889, 
    3894, 
    3906, 
    3909, 
    3916, 
    3921, 
    3926, 
    3929, 
    3941, 
    3675, 
    3680, 
    3682, 
    3688, 
    3689, 
    3692, 
    3695, 
    3698, 
    3703, 
    3707, 
    3711, 
    3719, 
    3725, 
    3730, 
    3734, 
    3744, 
    3755, 
    3763, 
    3769, 
    3782, 
    3791, 
    3799, 
    3802, 
    3809, 
    3814, 
    3818, 
    3822, 
    3826, 
    3834, 
    3838, 
    3844, 
    3849, 
    4290, 
    4403, 
    4666, 
    5018, 
    5115, 
    5254, 
    5329, 
    5410, 
    5471, 
    5580, 
    5658, 
    5886, 
    6069, 
    6370, 
    6573, 
    6881, 
    7235, 
    7397, 
    7654, 
    3552, 
    3569, 
    3572, 
    3599, 
    3638, 
    3609, 
    3620, 
    3629, 
    3656, 
    3670, 
    3681, 
    3701, 
    3721, 
    3748, 
    3776, 
    3795, 
    3829, 
    3880, 
    3910, 
    3931, 
    3951, 
    3987, 
    4137, 
    4295, 
    5062, 
    5357, 
    5513, 
    5566, 
    5613, 
    5680, 
    5754, 
    5966, 
    6065, 
    6248, 
    6475, 
    6547, 
    6643, 
    6856, 
    7160, 
    7228, 
    7296, 
    7465, 
    7631, 
    7671, 
    7722, 
    7780, 
    8220, 
    8301, 
    8347, 
    8367, 
    8449, 
    8452, 
    8465, 
    8466, 
    8467, 
    9014, 
    8396, 
    8416, 
    8420, 
    9011, 
    9013, 
    6316, 
    6482, 
    6630, 
    9531, 
    9536, 
    3546, 
    3567, 
    3586, 
    3597, 
    3603, 
    3613, 
    3618, 
    3738, 
    3750, 
    3767, 
    3770, 
    3800, 
    3548, 
    3560, 
    3583, 
    3601, 
    3614, 
    3621, 
    3624, 
    3636, 
    3650, 
    3654, 
    3662, 
    3668, 
    3960, 
    3965, 
    3984, 
    3985, 
    3986, 
    3989, 
    3995, 
    5330, 
    5402, 
    5803, 
    6050, 
    6238, 
    6564, 
    6656, 
    6797, 
    6927, 
    7134, 
    9537, 
    3604, 
    3784, 
    3967, 
    3988, 
    3996, 
    5286, 
    3815, 
    5403, 
    5423, 
    5433, 
    3817, 
    7784, 
    7970, 
    3607, 
    3610, 
    3825, 
    3827, 
    3612, 
    3617, 
    3864, 
    3867, 
    7835, 
    7916, 
    3870, 
    3872, 
    3898, 
    3900, 
    3901, 
    3903, 
    3911, 
    3912, 
    3915, 
    3917, 
    3933, 
    3934, 
    3935, 
    3936, 
    3952, 
    3953, 
    3619, 
    3830, 
    3841, 
    3847, 
    3852, 
    3625, 
    3955, 
    3957, 
    3992, 
    3993, 
    3994, 
    3626, 
    3677, 
    3678, 
    3683, 
    3687, 
    3696, 
    3706, 
    3717, 
    3731, 
    3737, 
    3745, 
    3754, 
    3765, 
    3774, 
    3781, 
    3789, 
    3798, 
    3804, 
    3813, 
    3823, 
    3828, 
    3836, 
    3840, 
    3846, 
    3853, 
    3861, 
    3875, 
    3892, 
    3895, 
    3908, 
    3920, 
    3927, 
    3937, 
    3942, 
    3956, 
    3961, 
    3969, 
    3997, 
    4728, 
    4748, 
    4759, 
    3806, 
    3820, 
    3835, 
    3843, 
    3850, 
    3858, 
    3868, 
    3876, 
    3884, 
    3891, 
    3893, 
    3902, 
    3907, 
    3914, 
    3923, 
    3928, 
    3940, 
    3947, 
    4810, 
    4828, 
    4851, 
    4877, 
    4897, 
    4923, 
    4942, 
    4963, 
    4990, 
    9532, 
    5637, 
    5677, 
    5746, 
    5787, 
    5844, 
    5892, 
    5952, 
    6055, 
    6201, 
    6272, 
    6430, 
    6501, 
    6583, 
    6698, 
    6743, 
    6784, 
    9529, 
    9530, 
    3540, 
    3557, 
    3563, 
    3593, 
    3598, 
    3602, 
    3606, 
    3611, 
    3615, 
    3622, 
    3627, 
    3630, 
    3635, 
    3643, 
    3646, 
    3649, 
    3653, 
    3657, 
    3661, 
    3665, 
    3667, 
    3672, 
    3674, 
    3676, 
    3679, 
    3684, 
    3686, 
    3690, 
    3694, 
    3699, 
    3704, 
    3713, 
    3720, 
    3736, 
    3746, 
    3752, 
    3760, 
    3764, 
    3773, 
    3779, 
    3783, 
    3790, 
    3591, 
    3631, 
    3633, 
    3639, 
    3640, 
    3644, 
    3990, 
    3991, 
    3645, 
    9367, 
    9368, 
    9414, 
    9415, 
    9416, 
    9417, 
    9533, 
    9534, 
    9535
  ) 
  AND companies.status IN ('A') 
  AND products.company_id IN (
    1, 
    25, 
    34, 
    35, 
    36, 
    37, 
    38, 
    39, 
    40, 
    41, 
    42, 
    43, 
    44, 
    45, 
    46, 
    47, 
    48, 
    49, 
    50, 
    51, 
    52, 
    53, 
    54, 
    55, 
    56, 
    57, 
    58, 
    59, 
    60, 
    61, 
    62, 
    63, 
    64, 
    65, 
    66, 
    67, 
    68, 
    69, 
    70, 
    71, 
    72, 
    73, 
    74, 
    75, 
    76, 
    77, 
    78, 
    79, 
    81, 
    82, 
    83, 
    84, 
    85, 
    86, 
    87, 
    88, 
    89, 
    90, 
    91, 
    92, 
    93, 
    94, 
    95, 
    96, 
    97, 
    98, 
    99, 
    100, 
    101, 
    102, 
    103, 
    104, 
    105, 
    106, 
    108, 
    109, 
    110, 
    111, 
    122, 
    123, 
    124, 
    125, 
    126, 
    127, 
    128, 
    129, 
    130, 
    131, 
    132, 
    134, 
    135, 
    136, 
    137, 
    138, 
    139, 
    140, 
    141, 
    142, 
    143, 
    144, 
    145, 
    146, 
    148, 
    150, 
    152, 
    153, 
    154, 
    155, 
    156, 
    157, 
    158, 
    159, 
    160, 
    161, 
    162, 
    163, 
    164, 
    165, 
    166, 
    167, 
    168, 
    169, 
    170, 
    171, 
    172, 
    173, 
    174, 
    175, 
    176, 
    177, 
    178, 
    179, 
    180, 
    181, 
    182, 
    183, 
    184, 
    185, 
    186, 
    187, 
    188, 
    189, 
    190, 
    191, 
    192, 
    193, 
    194, 
    196, 
    197, 
    198, 
    199, 
    200, 
    202, 
    203, 
    204, 
    205, 
    206, 
    207, 
    208, 
    210, 
    211, 
    212, 
    213, 
    214, 
    215, 
    216, 
    217, 
    218, 
    219, 
    220, 
    221, 
    222, 
    223, 
    224, 
    225, 
    226, 
    227, 
    228, 
    229, 
    230, 
    231, 
    232, 
    233, 
    234, 
    235, 
    236, 
    237, 
    238, 
    239, 
    240, 
    241, 
    242, 
    243, 
    244, 
    245, 
    246, 
    247, 
    248, 
    249, 
    250, 
    251, 
    252, 
    253, 
    254, 
    255, 
    256, 
    257, 
    259, 
    260, 
    261, 
    262, 
    263, 
    264, 
    266, 
    268, 
    269, 
    271, 
    272, 
    273, 
    276, 
    277, 
    278, 
    279, 
    280, 
    281, 
    282, 
    284, 
    285, 
    286, 
    287, 
    288, 
    289, 
    290, 
    291, 
    292, 
    293, 
    294, 
    295, 
    296, 
    297, 
    298, 
    299, 
    300, 
    301, 
    302, 
    303, 
    304, 
    305, 
    306, 
    307, 
    308, 
    309, 
    310, 
    311, 
    312, 
    313, 
    314, 
    315, 
    316, 
    317, 
    318, 
    319, 
    321, 
    322, 
    323, 
    324, 
    325, 
    326, 
    327, 
    328, 
    329, 
    330, 
    331, 
    332, 
    333, 
    334, 
    335, 
    336, 
    337, 
    338, 
    339, 
    340, 
    341, 
    342, 
    343, 
    344, 
    345, 
    346, 
    347, 
    348, 
    349, 
    350, 
    351, 
    352, 
    353, 
    354, 
    355, 
    356, 
    357, 
    358, 
    359, 
    360, 
    361, 
    362, 
    363, 
    364, 
    365, 
    366, 
    367, 
    368, 
    369, 
    370, 
    371, 
    372, 
    373, 
    374, 
    377, 
    378, 
    379, 
    380, 
    381, 
    382, 
    383, 
    384, 
    385, 
    387, 
    388, 
    389, 
    391, 
    392, 
    393, 
    394, 
    395, 
    396, 
    397, 
    398, 
    400, 
    401, 
    402, 
    403, 
    404, 
    405, 
    406, 
    407, 
    408, 
    409, 
    410, 
    411, 
    414, 
    415, 
    416, 
    417, 
    418, 
    419, 
    420, 
    421, 
    422, 
    423, 
    424, 
    425, 
    426, 
    427, 
    428, 
    429, 
    430, 
    431, 
    432, 
    433, 
    434, 
    435, 
    436, 
    439, 
    440, 
    443, 
    445, 
    447, 
    448, 
    449, 
    450, 
    451, 
    452, 
    454, 
    455, 
    457, 
    458, 
    459, 
    460, 
    461, 
    462, 
    463, 
    465, 
    466, 
    467, 
    468, 
    469, 
    470, 
    471, 
    472, 
    473, 
    474, 
    476, 
    478, 
    479, 
    480, 
    481, 
    482, 
    483, 
    484, 
    485, 
    486, 
    487, 
    488, 
    489, 
    491, 
    492, 
    493, 
    494, 
    495, 
    496, 
    497, 
    498, 
    501, 
    503, 
    504, 
    505, 
    507, 
    508, 
    509, 
    510, 
    511, 
    512, 
    513, 
    514, 
    515, 
    516, 
    518, 
    519, 
    520, 
    522, 
    524, 
    525, 
    526, 
    527, 
    528, 
    531, 
    532, 
    533, 
    535, 
    537, 
    539, 
    540, 
    541, 
    542, 
    543, 
    545, 
    546, 
    547, 
    548, 
    549, 
    550, 
    551, 
    553, 
    554, 
    556, 
    557, 
    558, 
    559, 
    560, 
    561, 
    562, 
    563, 
    564, 
    566, 
    567, 
    568, 
    569, 
    575, 
    576, 
    577, 
    579, 
    580, 
    582, 
    583, 
    585, 
    586, 
    587, 
    588, 
    590, 
    591, 
    592, 
    593, 
    594, 
    595, 
    596, 
    597, 
    598, 
    600, 
    602, 
    603, 
    604, 
    606, 
    607, 
    609, 
    610, 
    611, 
    613, 
    618, 
    620, 
    621, 
    622, 
    623, 
    624, 
    625, 
    626, 
    627, 
    628, 
    629, 
    630, 
    631, 
    632, 
    633, 
    634, 
    635, 
    636, 
    637, 
    639, 
    641, 
    642, 
    643, 
    644, 
    646, 
    647, 
    649, 
    655, 
    660, 
    661, 
    662, 
    663, 
    665, 
    668, 
    669, 
    670, 
    671, 
    672, 
    673, 
    674, 
    675, 
    676, 
    678, 
    679, 
    680, 
    681, 
    682, 
    685, 
    686, 
    687, 
    688, 
    689, 
    690, 
    691, 
    692, 
    693, 
    694, 
    695, 
    696, 
    697, 
    707, 
    719, 
    0
  ) 
  AND products.company_id = 707 
  AND products.status IN ('A') 
  AND products.free_shipping = 'Y' 
  AND (
    products.usergroup_ids = '' 
    OR FIND_IN_SET(0, products.usergroup_ids) 
    OR FIND_IN_SET(1, products.usergroup_ids)
  ) 
  AND products.status IN ('A') 
  AND prices.usergroup_id IN (0, 0, 1) 
  AND products.company_id = 707 
GROUP BY 
  product_id 
ORDER BY 
  popularity.total desc, 
  products.product_id ASC

Query time 0.07228

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "5298.81"
    },
    "ordering_operation": {
      "using_filesort": true,
      "grouping_operation": {
        "using_temporary_table": true,
        "using_filesort": true,
        "buffer_result": {
          "using_temporary_table": true,
          "nested_loop": [
            {
              "table": {
                "table_name": "companies",
                "access_type": "const",
                "possible_keys": [
                  "PRIMARY"
                ],
                "key": "PRIMARY",
                "used_key_parts": [
                  "company_id"
                ],
                "key_length": "4",
                "ref": [
                  "const"
                ],
                "rows_examined_per_scan": 1,
                "rows_produced_per_join": 1,
                "filtered": "100.00",
                "cost_info": {
                  "read_cost": "0.00",
                  "eval_cost": "0.20",
                  "prefix_cost": "0.00",
                  "data_read_per_join": "9K"
                },
                "used_columns": [
                  "company_id",
                  "status",
                  "company",
                  "ec_rfq_whatsapp_number",
                  "ec_rfq_phone_number",
                  "ec_rfq_bhf",
                  "ec_rfq_bht"
                ]
              }
            },
            {
              "table": {
                "table_name": "cscart_categories",
                "access_type": "range",
                "possible_keys": [
                  "PRIMARY",
                  "c_status",
                  "p_category_id"
                ],
                "key": "PRIMARY",
                "used_key_parts": [
                  "category_id"
                ],
                "key_length": "3",
                "rows_examined_per_scan": 379,
                "rows_produced_per_join": 15,
                "filtered": "4.00",
                "cost_info": {
                  "read_cost": "529.24",
                  "eval_cost": "3.03",
                  "prefix_cost": "532.27",
                  "data_read_per_join": "89K"
                },
                "used_columns": [
                  "category_id",
                  "usergroup_ids",
                  "status",
                  "storefront_id"
                ],
                "attached_condition": "((`webmarco`.`cscart_categories`.`category_id` in (3532,3535,3539,3549,3632,3641,3647,3652,3655,3663,3671,3856,3865,3882,3889,3894,3906,3909,3916,3921,3926,3929,3941,3675,3680,3682,3688,3689,3692,3695,3698,3703,3707,3711,3719,3725,3730,3734,3744,3755,3763,3769,3782,3791,3799,3802,3809,3814,3818,3822,3826,3834,3838,3844,3849,4290,4403,4666,5018,5115,5254,5329,5410,5471,5580,5658,5886,6069,6370,6573,6881,7235,7397,7654,3552,3569,3572,3599,3638,3609,3620,3629,3656,3670,3681,3701,3721,3748,3776,3795,3829,3880,3910,3931,3951,3987,4137,4295,5062,5357,5513,5566,5613,5680,5754,5966,6065,6248,6475,6547,6643,6856,7160,7228,7296,7465,7631,7671,7722,7780,8220,8301,8347,8367,8449,8452,8465,8466,8467,9014,8396,8416,8420,9011,9013,6316,6482,6630,9531,9536,3546,3567,3586,3597,3603,3613,3618,3738,3750,3767,3770,3800,3548,3560,3583,3601,3614,3621,3624,3636,3650,3654,3662,3668,3960,3965,3984,3985,3986,3989,3995,5330,5402,5803,6050,6238,6564,6656,6797,6927,7134,9537,3604,3784,3967,3988,3996,5286,3815,5403,5423,5433,3817,7784,7970,3607,3610,3825,3827,3612,3617,3864,3867,7835,7916,3870,3872,3898,3900,3901,3903,3911,3912,3915,3917,3933,3934,3935,3936,3952,3953,3619,3830,3841,3847,3852,3625,3955,3957,3992,3993,3994,3626,3677,3678,3683,3687,3696,3706,3717,3731,3737,3745,3754,3765,3774,3781,3789,3798,3804,3813,3823,3828,3836,3840,3846,3853,3861,3875,3892,3895,3908,3920,3927,3937,3942,3956,3961,3969,3997,4728,4748,4759,3806,3820,3835,3843,3850,3858,3868,3876,3884,3891,3893,3902,3907,3914,3923,3928,3940,3947,4810,4828,4851,4877,4897,4923,4942,4963,4990,9532,5637,5677,5746,5787,5844,5892,5952,6055,6201,6272,6430,6501,6583,6698,6743,6784,9529,9530,3540,3557,3563,3593,3598,3602,3606,3611,3615,3622,3627,3630,3635,3643,3646,3649,3653,3657,3661,3665,3667,3672,3674,3676,3679,3684,3686,3690,3694,3699,3704,3713,3720,3736,3746,3752,3760,3764,3773,3779,3783,3790,3591,3631,3633,3639,3640,3644,3990,3991,3645,9367,9368,9414,9415,9416,9417,9533,9534,9535)) and ((`webmarco`.`cscart_categories`.`usergroup_ids` = '') or find_in_set(0,`webmarco`.`cscart_categories`.`usergroup_ids`) or find_in_set(1,`webmarco`.`cscart_categories`.`usergroup_ids`)) and (`webmarco`.`cscart_categories`.`status` in ('A','H')) and (`webmarco`.`cscart_categories`.`storefront_id` in (0,1)))"
              }
            },
            {
              "table": {
                "table_name": "products_categories",
                "access_type": "ref",
                "possible_keys": [
                  "PRIMARY",
                  "pt"
                ],
                "key": "PRIMARY",
                "used_key_parts": [
                  "category_id"
                ],
                "key_length": "3",
                "ref": [
                  "webmarco.cscart_categories.category_id"
                ],
                "rows_examined_per_scan": 179,
                "rows_produced_per_join": 2720,
                "filtered": "100.00",
                "using_index": true,
                "cost_info": {
                  "read_cost": "19.12",
                  "eval_cost": "544.12",
                  "prefix_cost": "1095.51",
                  "data_read_per_join": "42K"
                },
                "used_columns": [
                  "product_id",
                  "category_id"
                ]
              }
            },
            {
              "table": {
                "table_name": "prices",
                "access_type": "ref",
                "possible_keys": [
                  "usergroup",
                  "product_id",
                  "lower_limit",
                  "usergroup_id"
                ],
                "key": "usergroup",
                "used_key_parts": [
                  "product_id"
                ],
                "key_length": "3",
                "ref": [
                  "webmarco.products_categories.product_id"
                ],
                "rows_examined_per_scan": 1,
                "rows_produced_per_join": 680,
                "filtered": "25.00",
                "using_index": true,
                "cost_info": {
                  "read_cost": "2720.58",
                  "eval_cost": "136.03",
                  "prefix_cost": "4360.21",
                  "data_read_per_join": "42K"
                },
                "used_columns": [
                  "product_id",
                  "lower_limit",
                  "usergroup_id"
                ],
                "attached_condition": "((`webmarco`.`prices`.`lower_limit` = 1) and (`webmarco`.`prices`.`usergroup_id` in (0,0,1)))"
              }
            },
            {
              "table": {
                "table_name": "products",
                "access_type": "eq_ref",
                "possible_keys": [
                  "PRIMARY",
                  "status",
                  "idx_parent_product_id"
                ],
                "key": "PRIMARY",
                "used_key_parts": [
                  "product_id"
                ],
                "key_length": "3",
                "ref": [
                  "webmarco.products_categories.product_id"
                ],
                "rows_examined_per_scan": 1,
                "rows_produced_per_join": 34,
                "filtered": "5.00",
                "cost_info": {
                  "read_cost": "680.15",
                  "eval_cost": "6.80",
                  "prefix_cost": "5176.39",
                  "data_read_per_join": "265K"
                },
                "used_columns": [
                  "product_id",
                  "product_type",
                  "status",
                  "company_id",
                  "usergroup_ids",
                  "free_shipping",
                  "parent_product_id"
                ],
                "attached_condition": "((`webmarco`.`products`.`company_id` = 707) and (`webmarco`.`products`.`status` = 'A') and (`webmarco`.`products`.`free_shipping` = 'Y') and ((`webmarco`.`products`.`usergroup_ids` = '') or find_in_set(0,`webmarco`.`products`.`usergroup_ids`) or find_in_set(1,`webmarco`.`products`.`usergroup_ids`)))"
              }
            },
            {
              "table": {
                "table_name": "cscart_ec_table_booking_system",
                "access_type": "eq_ref",
                "possible_keys": [
                  "PRIMARY"
                ],
                "key": "PRIMARY",
                "used_key_parts": [
                  "product_id"
                ],
                "key_length": "4",
                "ref": [
                  "webmarco.products_categories.product_id"
                ],
                "rows_examined_per_scan": 1,
                "rows_produced_per_join": 34,
                "filtered": "100.00",
                "cost_info": {
                  "read_cost": "34.01",
                  "eval_cost": "6.80",
                  "prefix_cost": "5217.20",
                  "data_read_per_join": "5K"
                },
                "used_columns": [
                  "product_id",
                  "booking_type"
                ],
                "attached_condition": "<if>(is_not_null_compl(cscart_ec_table_booking_system), (`webmarco`.`cscart_ec_table_booking_system`.`product_id` = `webmarco`.`products_categories`.`product_id`), true)"
              }
            },
            {
              "table": {
                "table_name": "popularity",
                "access_type": "eq_ref",
                "possible_keys": [
                  "PRIMARY",
                  "total"
                ],
                "key": "PRIMARY",
                "used_key_parts": [
                  "product_id"
                ],
                "key_length": "3",
                "ref": [
                  "webmarco.products_categories.product_id"
                ],
                "rows_examined_per_scan": 1,
                "rows_produced_per_join": 34,
                "filtered": "100.00",
                "cost_info": {
                  "read_cost": "34.01",
                  "eval_cost": "6.80",
                  "prefix_cost": "5258.01",
                  "data_read_per_join": "1K"
                },
                "used_columns": [
                  "product_id",
                  "total"
                ]
              }
            },
            {
              "table": {
                "table_name": "descr1",
                "access_type": "eq_ref",
                "possible_keys": [
                  "PRIMARY",
                  "product_id"
                ],
                "key": "PRIMARY",
                "used_key_parts": [
                  "product_id",
                  "lang_code"
                ],
                "key_length": "9",
                "ref": [
                  "webmarco.products_categories.product_id",
                  "const"
                ],
                "rows_examined_per_scan": 1,
                "rows_produced_per_join": 34,
                "filtered": "100.00",
                "cost_info": {
                  "read_cost": "34.01",
                  "eval_cost": "6.80",
                  "prefix_cost": "5298.81",
                  "data_read_per_join": "232K"
                },
                "used_columns": [
                  "product_id",
                  "lang_code",
                  "product"
                ]
              }
            }
          ]
        }
      }
    }
  }
}