这条语句会查询 pg_catalog.pg_attribute 表,并结合 pg_catalog.pg_attrdef 表来获取列的详细信息,包括列名、数据类型、是否允许为空以及默认值等。 使用pg_dump 工具(导出表结构)**: 如果需要导出整个数据库的表结构,可以使用 pg_dump 工具,并指定 --schema-only 选项来仅导出表结构。例如: bash pg_dump...
2. 查看所有表的详细信息 如果需要查看表的更详细信息,比如表的所有列、数据类型等,可以使用系统表pg_catalog.pg_description和pg_catalog.pg_attribute。下面是一个示例代码: SELECTc.relnameAStable_name,a.attnameAScolumn_name,format_type(a.atttypid,a.atttypmod)ASdata_typeFROMpg_catalog.pg_class cJOIN...
pg_catalog.string_to_array(pg_catalog.textin( pg_catalog.int2vectorout(i.indkey)),' ')::int[] AS indkey FROM pg_catalog.pg_index i JOIN pg_catalog.pg_class ci ON ci.oid = i.indexrelid WHERE ci.relam=(SELECT oid FROM pg_am WHERE amname = 'btree') AND ci.relpages > 0 ) ...
RETURNS "pg_catalog"."void" AS $BODY$ DECLARE loop_index integer; BEGIN loop_index=1; END; $BODY$ LANGUAGE plpgsql VOLATILE COST 100 (二)函数调用 select ods.find_table_by_column_and_schema(10); (三) 输入参数 CREATE OR REPLACE FUNCTION ods.find_table_by_column_and_schema(in_param_sch...
"area_code_work"varchar(20) COLLATE "pg_catalog"."default", "degree"varchar(40) COLLATE "pg_catalog"."default", "employ_num" int4, "employ_ratio" numeric(20,2), "create_time"timestamp(6)DEFAULTpg_systimestamp(), "update_time"timestamp(6)DEFAULTpg_systimestamp(),CONSTRAINT"m_hz_cy...
"eqp_name" varchar(256) COLLATE "pg_catalog"."default", "eqp_spoffice" varchar(64) COLLATE "pg_catalog"."default", "eqp_place" varchar(192) COLLATE "pg_catalog"."default", "priority" int4, "cleared" int4 DEFAULT 0, "day_id" varchar(2) NOT NULL ...
在PostgreSQL 中,删除表的操作日志(也称为删除表的记录)不会被保存在单独的日志文件中。相反,删除表的操作会被记录在 PostgreSQL 的系统表中,例如 pg_catalog.pg_stat_activity、pg_catalog.pg_stat_user_tables、pg_catalog.pg_stat_all_tables 等系统表中。您可以通过查询这些系统表来查看有关删除表操作的相关...
Catalog定义在pg_statistic.h中: 代码语言:javascript 复制 /* --- * pg_statistic definition. cpp turns this into * typedef struct FormData_pg_statistic * --- */CATALOG(pg_statistic,2619,StatisticRelationId){/* These fields form the unique key for the entry: */Oid starelid;/* relation cont...
视图"pg_catalog.pg_stat_all_tables"栏位|类型|校对规则|可空的|预设|存储|描述---+---+---+---+---+---+---relid|oid|||plain|schemaname|name|||plain|relname|name|||plain|seq_scan|bigint|||plain|seq_tup_read|bigint|||plain|idx_scan|bigint|||plain|idx_tup_fetch|bigint|||pl...
FROM pg_catalog.pg_database d ORDER BY CASEWHENpg_catalog.has_database_privilege(d.datname,'CONNECT')THENpg_catalog.pg_database_size(d.datname)ELSE NULL END DESC--nulls first LIMIT20 1. 2. 3. 4. 5. 6. 7. 8. 9. 10.