Sql espace其中OID=pg_my_temp_schema（））您的测试有几个弱点。正确的测试应该是table\u schema，比如'pg\\u temp\\u%'或者更严格的测试：table\u schema~'^pg\u temp\ud+$'@Pet

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espace其中OID=pg_my_temp_schema（））您的测试有几个弱点。正确的测试应该是

table\u schema，比如'pg\\u temp\\u%'

或者更严格的测试：

table\u schema~'^pg\u temp\ud+$'

@PeterKrauss如果您试图在9.4以上版本的postgres上使用to\u regclass函数，您将得到该错误。必须有9.4+如果存在。。。如果不存在。。没有[]

public
company1
company2
company3
...
companynn

search_path='company3,public'

select isSpecific('company3','tablenotincompany3schema')

select isSpecific('company3','tableincompany3schema')

SELECT EXISTS(
    SELECT * 
    FROM information_schema.tables 
    WHERE 
      table_schema = 'company3' AND 
      table_name = 'tableincompany3schema'
);

SELECT 'schema_name.table_name'::regclass

SELECT to_regclass('schema_name.table_name');

/**
 * From my old SwissKnife Lib to your SwissKnife. License CC0.
 * Check and normalize to array the free-parameter relation-name.
 * Options: (name); (name,schema), ("schema.name"). Ignores schema2 in ("schema.name",schema2).
 */
CREATE FUNCTION relname_to_array(text,text default NULL) RETURNS text[] AS $f$
     SELECT array[n.nspname::text, c.relname::text]
     FROM   pg_catalog.pg_class c JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace,
            regexp_split_to_array($1,'\.') t(x) -- not work with quoted names
     WHERE  CASE
              WHEN COALESCE(x[2],'')>'' THEN n.nspname = x[1]      AND c.relname = x[2]
              WHEN $2 IS NULL THEN           n.nspname = 'public'  AND c.relname = $1
              ELSE                           n.nspname = $2        AND c.relname = $1
            END
$f$ language SQL IMMUTABLE;

CREATE FUNCTION relname_exists(text,text default NULL) RETURNS boolean AS $wrap$
  SELECT EXISTS (SELECT relname_to_array($1,$2))
$wrap$ language SQL IMMUTABLE;

CREATE FUNCTION relname_normalized(text,text default NULL,boolean DEFAULT true) RETURNS text AS $wrap$
  SELECT COALESCE(array_to_string(relname_to_array($1,$2), '.'), CASE WHEN $3 THEN '' ELSE NULL END)
$wrap$ language SQL IMMUTABLE;