230 lines
7.2 KiB
JSON
230 lines
7.2 KiB
JSON
{
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"role": "dimension",
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"time": {
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"range": null,
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"column": null,
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"has_gaps": null,
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"granularity": "unknown"
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},
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"grain": [
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"service_point_id"
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],
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"table": "data-ge.water_meter_info",
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"columns": [
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{
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"name": "supply_office",
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"dtype": "string",
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"stats": {
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"max": null,
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"min": null,
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"std": null,
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"mean": null,
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"skewness": null
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},
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"comment": "非空；11 个枚举值（GE 约束）",
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"enumish": true,
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"null_rate": 0.0,
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"top_values": [],
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"semantic_type": "dimension",
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"distinct_count": 11,
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"distinct_ratio": 0.03666666666666667,
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"pk_candidate_score": 0.05,
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"metric_candidate_score": 0.0
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},
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{
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"name": "station",
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"dtype": "string",
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"stats": {
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"max": null,
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"min": null,
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"std": null,
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"mean": null,
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"skewness": null
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},
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"comment": "非空；36 个枚举值（GE 约束）",
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"enumish": true,
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"null_rate": 0.0,
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"top_values": [],
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"semantic_type": "dimension",
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"distinct_count": 36,
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"distinct_ratio": 0.12,
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"pk_candidate_score": 0.1,
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"metric_candidate_score": 0.0
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},
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{
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"name": "district",
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"dtype": "string",
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"stats": {
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"max": null,
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"min": null,
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"std": null,
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"mean": null,
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"skewness": null
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},
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"comment": "非空；13 个枚举值（GE 约束）",
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"enumish": true,
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"null_rate": 0.0,
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"top_values": [],
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"semantic_type": "dimension",
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"distinct_count": 13,
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"distinct_ratio": 0.043333333333333335,
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"pk_candidate_score": 0.05,
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"metric_candidate_score": 0.0
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},
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{
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"name": "meter_diameter",
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"dtype": "string",
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"stats": {
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"max": null,
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"min": null,
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"std": null,
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"mean": null,
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"skewness": null
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},
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"comment": "非空；8 个枚举值（GE 约束）",
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"enumish": true,
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"null_rate": 0.0,
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"top_values": [],
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"semantic_type": "dimension",
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"distinct_count": 8,
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"distinct_ratio": 0.02666666666666667,
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"pk_candidate_score": 0.03,
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"metric_candidate_score": 0.0
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},
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{
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"name": "meter_status",
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"dtype": "string",
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"stats": {
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"max": null,
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"min": null,
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"std": null,
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"mean": null,
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"skewness": null
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},
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"comment": "非空；单一取值（\"有效\"）",
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"enumish": true,
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"null_rate": 0.0,
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"top_values": [],
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"semantic_type": "dimension",
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"distinct_count": 1,
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"distinct_ratio": 0.0033333333333333335,
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"pk_candidate_score": 0.0,
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"metric_candidate_score": 0.0
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},
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{
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"name": "meter_subtype",
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"dtype": "string",
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"stats": {
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"max": null,
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"min": null,
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"std": null,
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"mean": null,
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"skewness": null
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},
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"comment": "非空；9 个枚举值（GE 约束）",
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"enumish": true,
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"null_rate": 0.0,
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"top_values": [],
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"semantic_type": "dimension",
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"distinct_count": 9,
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"distinct_ratio": 0.03,
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"pk_candidate_score": 0.03,
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"metric_candidate_score": 0.0
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},
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{
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"name": "meter_type",
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"dtype": "string",
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"stats": {
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"max": null,
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"min": null,
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"std": null,
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"mean": null,
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"skewness": null
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},
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"comment": "非空；5 个枚举值（GE 约束）",
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"enumish": true,
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"null_rate": 0.0,
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"top_values": [],
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"semantic_type": "dimension",
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"distinct_count": 5,
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"distinct_ratio": 0.016666666666666666,
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"pk_candidate_score": 0.02,
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"metric_candidate_score": 0.0
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},
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{
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"name": "installation_position",
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"dtype": "string",
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"stats": {
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"max": null,
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"min": null,
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"std": null,
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"mean": null,
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"skewness": null
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},
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"comment": "非空；4 个枚举值（GE 约束）",
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"enumish": true,
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"null_rate": 0.0,
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"top_values": [],
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"semantic_type": "dimension",
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"distinct_count": 4,
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"distinct_ratio": 0.013333333333333334,
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"pk_candidate_score": 0.02,
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"metric_candidate_score": 0.0
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},
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{
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"name": "service_point_id",
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"dtype": "unknown",
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"stats": {
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"max": null,
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"min": null,
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"std": null,
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"mean": null,
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"skewness": null
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},
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"comment": "命名指示标识列；未提供唯一性或非空验证",
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"enumish": null,
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"null_rate": null,
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"top_values": [],
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"semantic_type": "id",
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"distinct_count": null,
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"distinct_ratio": null,
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"pk_candidate_score": 0.6,
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"metric_candidate_score": 0.05
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},
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{
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"name": "account_id",
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"dtype": "unknown",
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"stats": {
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"max": null,
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"min": null,
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"std": null,
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"mean": null,
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"skewness": null
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},
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"comment": "命名指示账户标识；未提供唯一性或非空验证",
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"enumish": null,
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"null_rate": null,
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"top_values": [],
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"semantic_type": "id",
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"distinct_count": null,
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"distinct_ratio": null,
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"pk_candidate_score": 0.5,
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"metric_candidate_score": 0.05
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}
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],
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"quality": {
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"warning_hints": [
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"以下列未设置非空校验：service_point_id, account_id（空值情况未知）",
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"未识别到时间列"
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],
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"failed_expectations": []
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},
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"row_count": 300,
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"fk_candidates": [],
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"confidence_notes": [
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"role 判定为 dimension：表内列均为枚举/分类或ID，未发现数值型度量或时间列；34/34 期望均为分类枚举/非空与去重比例。",
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"grain 猜测为 service_point_id：仅依据命名启发式，缺少唯一性与非空度量佐证（置信度较低）。",
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"未识别时间列：列名与期望均未涉及日期/时间，也无最小/最大时间范围可推断。"
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],
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"primary_key_candidates": []
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} |