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descpartxx.sql

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+-- Copyright 2018 Tanel Poder. All rights reserved. More info at http://tanelpoder.com
+-- Licensed under the Apache License, Version 2.0. See LICENSE.txt for terms & conditions.
+
+-- descxx.sql requires the display_raw function which is included in the comment section below.
+-- the display_raw function is taken from Greg Rahn's blog as I'm too lazy to write one myself
+--     http://structureddata.org/2007/10/16/how-to-display-high_valuelow_value-columns-from-user_tab_col_statistics/
+--
+
+COL column_id       HEAD "Col#"         FOR A4
+COL column_name     HEAD "Column Name"  FOR A30
+COL nullable        HEAD "Null?"        FOR A10
+COL data_type       HEAD "Type"         FOR A25 WORD_WRAP
+COL num_distinct    HEAD "# distinct"   FOR 999999999999999
+COL density         HEAD "Density"      FOR 9.99999999999
+COL num_nulls       HEAD "# nulls"      FOR 999999999999999
+COL histogram       HEAD "Histogram"    FOR A10 TRUNCATE
+COL num_buckets     HEAD "# buckets"    FOR 999999
+COL low_value       HEAD "Low Value"    FOR A32
+COL high_value      HEAD "High Value"   FOR A32
+
+WITH
+    FUNCTION display_raw(rawval RAW, type VARCHAR2)
+    RETURN VARCHAR2
+    IS 
+        cn  NUMBER;
+        cv  VARCHAR2(128);
+        cd  DATE;
+        cnv NVARCHAR2(128);
+        cr  ROWID;
+        cc  CHAR(128);
+    BEGIN
+        IF (type = 'NUMBER') THEN
+            dbms_stats.convert_raw_value(rawval, cn);
+            RETURN to_char(cn);
+        ELSIF (type = 'VARCHAR2' OR type = 'CHAR') THEN
+            dbms_stats.convert_raw_value(rawval, cv);
+            RETURN to_char(cv);
+        ELSIF (type = 'DATE') THEN
+            dbms_stats.convert_raw_value(rawval, cd);
+            RETURN to_char(cd);
+        ELSIF (type = 'NVARCHAR2') THEN
+            dbms_stats.convert_raw_value(rawval, cnv);
+            RETURN to_char(cnv);
+        ELSIF (type = 'ROWID') THEN
+            dbms_stats.convert_raw_value(rawval, cr);
+            RETURN to_char(cr);
+        ELSIF (type = 'VARCHAR2') THEN
+            dbms_stats.convert_raw_value(rawval, cc);
+            RETURN to_char(cc);
+        ELSE
+            RETURN 'UNKNOWN DATATYPE';
+        END IF;
+    END;
+SELECT
+      cs.partition_name 
+    , CASE WHEN tc.hidden_column = 'YES' THEN 'H' ELSE ' ' END || LPAD(column_id, 3) AS column_id
+    , tc.column_name
+    , CASE WHEN nullable = 'N' THEN 'NOT NULL' ELSE NULL END AS nullable
+    , data_type || CASE 
+                    WHEN data_type = 'NUMBER' THEN '(' || data_precision || ',' || data_scale || ')'
+                    ELSE '(' || data_length || ')'
+                    END AS data_type
+    , cs.num_distinct
+    , cs.density
+    , cs.num_nulls
+    , CASE WHEN cs.histogram = 'NONE' THEN null ELSE cs.histogram END AS histogram
+    , cs.num_buckets
+    , display_raw(cs.low_value, data_type) AS low_value 
+    , display_raw(cs.high_value, data_type) AS high_value
+FROM dba_tab_cols tc,
+     dba_part_col_statistics cs
+WHERE
+    tc.owner = cs.owner (+)
+AND tc.table_name = cs.table_name (+)
+AND tc.column_name = cs.column_name (+)
+AND upper(tc.table_name) LIKE
+                        upper(CASE
+                                WHEN INSTR('&1','.') > 0 THEN
+                                    SUBSTR('&1',INSTR('&1','.')+1)
+                                ELSE
+                                    '&1'
+                                END
+                             )
+    AND tc.owner LIKE
+                CASE WHEN INSTR('&1','.') > 0 THEN
+                    UPPER(SUBSTR('&1',1,INSTR('&1','.')-1))
+                ELSE
+                    user
+                END
+    AND UPPER(cs.partition_name) LIKE UPPER('&2')
+ORDER BY
+    tc.owner, tc.table_name, tc.column_id,
+    cs.partition_name
+/