postgres表创建 | 易学教程

-- ----------------------------
-- Table structure for tb_143a7f37a7f04d6fae334f198ed6a474
-- ----------------------------
DROP TABLE IF EXISTS "public"."tb_111a7f37a7f04d6fae334f198ed6a474" cascade;   
CREATE TABLE "public"."tb_111a7f37a7f04d6fae334f198ed6a474" (
  "current_phase_a" float8,
  "current_phase_b" float8,
  "current_phase_c" float8,
  "voltage_phase_a" float8,
  "voltage_phase_b" float8,
  "voltage_phase_c" float8,
  "voltage_line_ab" float8,
  "voltage_line_bc" float8,
  "voltage_line_ca" float8,
  "active_power_a" float8,
  "active_power_b" float8,
  "active_power_c" float8,
  "reactive_power_a" float8,
  "reactive_power_b" float8,
  "reactive_power_c" float8,
  "apparent_power_a" float8,
  "apparent_power_b" float8,
  "apparent_power_c" float8,
  "active_kw_a" float8,
  "active_kw_b" float8,
  "active_kw_c" float8,
  "reactive_kw_a" float8,
  "reactive_kw_b" float8,
  "reactive_kw_c" float8,
  "apparent_kw_a" float8,
  "apparent_kw_b" float8,
  "apparent_kw_c" float8,
  "power_factor_a" float8,
  "power_factor_b" float8,
  "power_factor_c" float8,
  "signal_frequency_a" float8,
  "signal_frequency_b" float8,
  "signal_frequency_c" float8,
  "total_active_power" float8,
  "total_reactive_power" float8,
  "total_apparent_power" float8,
  "total_active_kw" float8,
  "total_reactive_kw" float8,
  "total_apparent_kw" float8,
  "total_power_factor" float8,
  "device_uuid" uuid,
  "timestamp" timestamptz(6) NOT NULL
)
;
SELECT create_hypertable('tb_111a7f37a7f04d6fae334f198ed6a474', 'timestamp');
-- ----------------------------
-- Records of tb_143a7f37a7f04d6fae334f198ed6a474
-- ----------------------------
-- ----------------------------
-- Indexes structure for table tb_143a7f37a7f04d6fae334f198ed6a474
-- ----------------------------
CREATE INDEX "tb_143a7f37a7f04d6fae334f198ed6a474_timestamp_idx" ON "public"."tb_111a7f37a7f04d6fae334f198ed6a474" USING btree (
  "timestamp" "pg_catalog"."timestamptz_ops" DESC NULLS FIRST
);

-- ----------------------------
-- Triggers structure for table tb_143a7f37a7f04d6fae334f198ed6a474
-- ----------------------------
CREATE TRIGGER "ts_insert_blocker" BEFORE INSERT ON "public"."tb_111a7f37a7f04d6fae334f198ed6a474"
FOR EACH ROW
EXECUTE PROCEDURE "_timescaledb_internal"."insert_blocker"();

cascade 删除表级联

SELECT create_hypertable('tb_111a7f37a7f04d6fae334f198ed6a474', 'timestamp'); 创建超表，使用 create_hypertable 函数将postgres标准表转化为 hypertablecreate_hypertable 有两个参数，第一个参数是表名，第二个参数是分区列，一般为 TIMESTAMPTZ类型
（hypertable 是 timescaledb 抽象的一张表，让用户操作 hypertable 就像操作 postgres的普通表一样，在内部，timescaledb 自动将hypertable 分割成块， timescaledb 会自动操作和管理 hypertable 的分区表。这对于用户来说是透明的）

create_hypertable可以自动创建索引和触发器

来源：https://www.cnblogs.com/weidaijie/p/11726576.html

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