94 lines
2.8 KiB
SQL
94 lines
2.8 KiB
SQL
-- descxx.sql requires the display_raw function which is included in the comment section below.
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-- the display_raw function is taken from Greg Rahn's blog as I'm too lazy to write one myself
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-- http://structureddata.org/2007/10/16/how-to-display-high_valuelow_value-columns-from-user_tab_col_statistics/
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--
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--create or replace function display_raw (rawval raw, type varchar2)
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--return varchar2
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--is
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-- cn number;
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-- cv varchar2(32);
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-- cd date;
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-- cnv nvarchar2(32);
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-- cr rowid;
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-- cc char(32);
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--begin
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-- if (type = 'NUMBER') then
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-- dbms_stats.convert_raw_value(rawval, cn);
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-- return to_char(cn);
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-- elsif (type = 'VARCHAR2') then
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-- dbms_stats.convert_raw_value(rawval, cv);
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-- return to_char(cv);
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-- elsif (type = 'DATE') then
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-- dbms_stats.convert_raw_value(rawval, cd);
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-- return to_char(cd);
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-- elsif (type = 'NVARCHAR2') then
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-- dbms_stats.convert_raw_value(rawval, cnv);
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-- return to_char(cnv);
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-- elsif (type = 'ROWID') then
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-- dbms_stats.convert_raw_value(rawval, cr);
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-- return to_char(cnv);
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-- elsif (type = 'CHAR') then
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-- dbms_stats.convert_raw_value(rawval, cc);
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-- return to_char(cc);
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-- else
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-- return 'UNKNOWN DATATYPE';
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-- end if;
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--end;
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--/
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--
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-- grant execute on display_raw to public;
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-- create public synonym display_raw for display_raw;
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COL desc_column_id HEAD "Col#" FOR A4
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COL desc_column_name HEAD "Column Name" FOR A30
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COL desc_data_type HEAD "Type" FOR A25 WORD_WRAP
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COL desc_nullable HEAD "Null?" FOR A10
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COL desc_low_value HEAD "Low Value" FOR A32
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COL desc_high_value HEAD "High Value" FOR A32
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COL desc_density HEAD "Density" FOR 9.99999999999
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-- prompt eXtended describe of &1
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SELECT
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CASE WHEN hidden_column = 'YES' THEN 'H' ELSE ' ' END||
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LPAD(column_id,3) desc_column_id,
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column_name desc_column_name,
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CASE WHEN nullable = 'N' THEN 'NOT NULL' ELSE NULL END AS desc_nullable,
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data_type||CASE
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-- WHEN data_type = 'NUMBER' THEN '('||data_precision||CASE WHEN data_scale = 0 THEN NULL ELSE ','||data_scale END||')'
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WHEN data_type = 'NUMBER' THEN '('||data_precision||','||data_scale||')'
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ELSE '('||data_length||')'
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END AS desc_data_type,
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-- data_default,
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num_distinct,
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density desc_density,
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num_nulls,
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CASE WHEN histogram = 'NONE' THEN null ELSE histogram END histogram,
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num_buckets,
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display_raw(low_value, data_type) desc_low_value,
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display_raw(high_value, data_type) desc_high_value
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FROM
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dba_tab_cols
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WHERE
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upper(table_name) LIKE
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upper(CASE
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WHEN INSTR('&1','.') > 0 THEN
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SUBSTR('&1',INSTR('&1','.')+1)
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ELSE
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'&1'
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END
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)
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AND owner LIKE
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CASE WHEN INSTR('&1','.') > 0 THEN
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UPPER(SUBSTR('&1',1,INSTR('&1','.')-1))
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ELSE
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user
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END
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ORDER BY
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column_id ASC
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/
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