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copied!<p>Might be this: <a href="http://www.sqlfiddle.com/#!1/d41d8/364" rel="noreferrer">http://www.sqlfiddle.com/#!1/d41d8/364</a></p> <pre><code>select translate(string_to_array(x.*::text,',')::text,'()','')::text[] from pg_tables as x </code></pre> <p>How it works (inside-out), 5 steps:</p> <p>1st:</p> <pre><code>select x.*::text from pg_tables as x; </code></pre> <p>Sample Output:</p> <pre><code>| X | ---------------------------------------------------------------- | (pg_catalog,pg_statistic,postgres,,t,f,f) | | (pg_catalog,pg_type,postgres,,t,f,f) | </code></pre> <p>2nd:</p> <pre><code>select string_to_array(x.*::text,',') from pg_tables as x; </code></pre> <p>Sample Output:</p> <pre><code>| STRING_TO_ARRAY | --------------------------------------------- | (pg_catalog,pg_statistic,postgres,,t,f,f) | | (pg_catalog,pg_type,postgres,,t,f,f) | </code></pre> <p>3rd:</p> <pre><code>select string_to_array(x.*::text,',')::text from pg_tables as x; </code></pre> <p>Sample Output:</p> <pre><code>| STRING_TO_ARRAY | ------------------------------------------------- | {(pg_catalog,pg_statistic,postgres,"",t,f,f)} | | {(pg_catalog,pg_type,postgres,"",t,f,f)} | </code></pre> <p>4th:</p> <pre><code>select translate( string_to_array(x.*::text,',')::text, '()', '') from pg_tables as x </code></pre> <p>Sample Output:</p> <pre><code>| TRANSLATE | ----------------------------------------------- | {pg_catalog,pg_statistic,postgres,"",t,f,f} | | {pg_catalog,pg_type,postgres,"",t,f,f} | </code></pre> <p>Finally:</p> <pre><code>select translate( string_to_array(x.*::text,',')::text, '()', '')::text[] from pg_tables as x </code></pre> <p>Sample Output:</p> <pre><code>| TRANSLATE | ------------------------------------------- | pg_catalog,pg_statistic,postgres,,t,f,f | | pg_catalog,pg_type,postgres,,t,f,f | </code></pre> <p>Live test: <a href="http://www.sqlfiddle.com/#!1/d41d8/373" rel="noreferrer">http://www.sqlfiddle.com/#!1/d41d8/373</a></p> <p>To prove that it works:</p> <pre><code>with a as ( select translate( string_to_array(x.*::text,',')::text, '()', '')::text[] as colArray from pg_tables as x ) select row_number() over(), unnest(colArray) from a; </code></pre> <p>Sample output:</p> <pre><code>| ROW_NUMBER | UNNEST | ---------------------------------------- | 1 | pg_catalog | | 1 | pg_statistic | | 1 | postgres | | 1 | | | 1 | t | | 1 | f | | 1 | f | | 2 | pg_catalog | | 2 | pg_type | | 2 | postgres | | 2 | | | 2 | t | | 2 | f | | 2 | f | </code></pre>

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