--创建测试表
DROP TABLE IF EXISTS aaa;
CREATE TABLE aaa (
a NUMERIC(18, 8),
b varchar2(10),
c INT,
d largeint,
e CLOB,
f DATE,
g TIMESTAMP(6),
h NUMERIC(20, 10),
PRIMARY KEY (a, b)
);
CREATE UNIQUE INDEX idx_aaa ON aaa (c, d);
COMMENT ON TABLE aaa IS '表aaa的注释';
COMMENT ON COLUMN aaa.a IS '字段a的注释';
COMMENT ON COLUMN aaa.b IS '字段b的注释';
COMMENT ON COLUMN aaa.c IS '字段c的注释';
COMMENT ON COLUMN aaa.d IS '字段d的注释';
COMMENT ON COLUMN aaa.e IS '字段e的注释';
COMMENT ON COLUMN aaa.f IS '字段f的注释';
COMMENT ON COLUMN aaa.g IS '字段g的注释';
COMMENT ON COLUMN aaa.h IS '字段h的注释';
1. 获取字段详细信息
SQL语句
SELECT a.schema_name, a.object_name AS table_name, b.column_name, b.sql_data_type AS data_type, b.column_size AS data_length
, b.column_precision AS data_precision, b.nullable, b.column_number AS column_id, b.column_scale AS data_scale
, CASE
WHEN c.column_name IS NOT NULL THEN 'Y'
ELSE 'N'
END AS is_pk
, CASE
WHEN g.column_name IS NOT NULL THEN 'Y'
ELSE 'N'
END AS is_unique
, h.text AS comments
FROM "_MD_".objects a
INNER JOIN "_MD_".columns b ON a.object_uid = b.object_uid
LEFT JOIN "_MD_".keys c
ON b.object_uid = c.object_uid
AND b.column_name = c.column_name
LEFT JOIN (SELECT d.base_table_uid, rtrim(f.column_name,'@') AS column_name
FROM "_MD_".indexes d
INNER JOIN "_MD_".objects e ON d.index_uid = e.object_uid
INNER JOIN "_MD_".columns f ON e.object_uid = f.object_uid
WHERE d.is_unique = 1
AND f.column_name <> 'SYSKEY') g
ON a.object_uid = g.base_table_uid
AND b.column_name = g.column_name
LEFT JOIN "_MD_".text h
ON b.object_uid = h.text_uid
AND b.column_number = h.sub_id
AND h.text_type = 12
WHERE a.schema_name NOT LIKE '|_BACKUP|_%%|_' ESCAPE '|'
AND a.schema_name NOT IN ('_MD_', '_PRIVMGR_MD_', '_REPOS_', '_LIBMGR_')
AND a.object_type IN ('BT')
AND a.object_name NOT IN ('SB_HISTOGRAMS', 'SB_HISTOGRAM_INTERVALS', 'SB_PERSISTENT_SAMPLES')
AND b.column_name <> 'SYSKEY'
AND a.schema_name = 'SEABASE'
AND a.object_name = 'AAA'
;
样例输出
SCHEMA_NAME
TABLE_NAME
COLUMN_NAME
DATA_TYPE
DATA_LENGTH
DATA_PRECISION
NULLABLE
COLUMN_ID
DATA_SCALE
IS_PK
IS_UNIQUE
COMMENTS
SEABASE
AAA
A
SIGNED LARGEINT
8
18
0
0
8
Y
Y
字段a的注释
SEABASE
AAA
H
SIGNED NUMERIC
10
20
1
7
10
N
N
字段h的注释
SEABASE
AAA
G
DATETIME
11
0
1
6
6
N
N
字段g的注释
SEABASE
AAA
F
DATETIME
4
0
1
5
0
N
N
字段f的注释
SEABASE
AAA
E
CLOB
1024
1
1
4
1073741824
N
N
字段e的注释
SEABASE
AAA
D
SIGNED LARGEINT
8
0
1
3
0
N
Y
字段d的注释
SEABASE
AAA
C
SIGNED INTEGER
4
0
1
2
0
N
Y
字段c的注释
SEABASE
AAA
B
VARCHAR
10
0
0
1
0
Y
Y
字段b的注释
2. 获取主键字段信息
SQL语句
SELECT a.schema_name, a.object_name AS table_name, b.column_name
, CASE
WHEN c.column_name IS NOT NULL THEN 'Y'
ELSE 'N'
END AS is_pk
FROM "_MD_".objects a
INNER JOIN "_MD_".columns b ON a.object_uid = b.object_uid
LEFT JOIN "_MD_".keys c
ON b.object_uid = c.object_uid
AND b.column_name = c.column_name
WHERE a.schema_name NOT LIKE '|_BACKUP|_%%|_' ESCAPE '|'
AND a.schema_name NOT IN ('_MD_', '_PRIVMGR_MD_', '_REPOS_', '_LIBMGR_')
AND a.object_type IN ('BT')
AND a.object_name NOT IN ('SB_HISTOGRAMS', 'SB_HISTOGRAM_INTERVALS', 'SB_PERSISTENT_SAMPLES')
AND b.column_name <> 'SYSKEY'
AND c.column_name IS NOT NULL
AND a.schema_name = 'SEABASE'
AND a.object_name = 'AAA'
;
样例输出
SCHEMA_NAME
TABLE_NAME
COLUMN_NAME
IS_PK
SEABASE
AAA
A
Y
SEABASE
AAA
B
Y
3. 获取固定表名所在的schema
SQL语句
SELECT a.schema_name
FROM "_MD_".objects a
WHERE a.object_name = 'AAA'
;
样例输出
SCHEMA_NAME
SEABASE
4. 获取指定shema名称
SQL语句
SELECT distinct a.schema_name
FROM "_MD_".objects a
WHERE a.schema_name = 'V7DEV'
;
样例输出
SCHEMA_NAME
V7DEV
5. 获取固定表名的字段是否唯一信息
SQL语句
SELECT a.schema_name, a.object_name AS table_name, b.column_name
, CASE
WHEN instr(g.column_list, b.column_name) > 0 THEN 'Y'
ELSE 'N'
END AS is_unique
FROM "_MD_".objects a
INNER JOIN "_MD_".columns b ON a.object_uid = b.object_uid
LEFT JOIN "_MD_".keys c
ON b.object_uid = c.object_uid
AND b.column_name = c.column_name
LEFT JOIN seabase.tbl_column_list g
ON a.object_uid = g.base_table_uid
WHERE a.schema_name NOT LIKE '|_BACKUP|_%%|_' ESCAPE '|'
AND a.schema_name NOT IN ('_MD_', '_PRIVMGR_MD_', '_REPOS_', '_LIBMGR_')
AND a.object_type IN ('BT')
AND a.object_name NOT IN ('SB_HISTOGRAMS', 'SB_HISTOGRAM_INTERVALS', 'SB_PERSISTENT_SAMPLES')
AND b.column_name <> 'SYSKEY'
AND a.schema_name = 'SEABASE'
AND a.object_name = 'AAA'
;
样例输出
SCHEMA_NAME
TABLE_NAME
COLUMN_NAME
IS_UNIQUE
SEABASE
AAA
A
Y
SEABASE
AAA
B
Y
SEABASE
AAA
C
Y
SEABASE
AAA
D
Y
SEABASE
AAA
E
N
SEABASE
AAA
F
N
SEABASE
AAA
G
N
SEABASE
AAA
H
N
6. 获取固定schema下所有表的行数
SQL语句
--创建函数,用于统计固定表名的行数
CREATE OR REPLACE FUNCTION count_rows(table_name varchar2(200),
schema_name varchar2(200)
) RETURN (rowcount INT)
AS
DECLARE
rowcount number;
stmt varchar2(2000);
BEGIN
if schema_name is null then
stmt := 'select count(*) from "' || table_name || '"';
else
stmt := 'select count(*) from "' || schema_name || '"."' || table_name || '"';
end if;
PREPARE s1 FROM stmt;
execute s1 into rowcount;
return rowcount;
END;
/
SELECT a.schema_name, a.object_name AS table_name, seabase.count_rows(a.object_name, a.schema_name) AS rowcount
FROM "_MD_".objects a
WHERE a.object_name NOT IN ('SB_HISTOGRAMS', 'SB_HISTOGRAM_INTERVALS', 'SB_PERSISTENT_SAMPLES')
AND a.object_name NOT LIKE 'LOBDescChunks%'
AND a.object_name NOT LIKE 'LOBMD%'
AND a.object_name NOT LIKE 'LOBDescHandle%'
AND a.object_type IN ('BT')
AND a.schema_name = 'SEABASE'
;
--字段拼接不考虑顺序
SELECT a.schema_name, a.object_name AS table_name, pivot(b.column_name, MAX LENGTH 10240) AS column_list
FROM "_MD_".objects a
INNER JOIN "_MD_".columns b ON a.object_uid = b.object_uid
WHERE a.schema_name NOT LIKE '|_BACKUP|_%%|_' ESCAPE '|'
AND a.schema_name NOT IN ('_MD_', '_PRIVMGR_MD_', '_REPOS_', '_LIBMGR_')
AND a.object_type IN ('BT')
AND a.object_name NOT IN ('SB_HISTOGRAMS', 'SB_HISTOGRAM_INTERVALS', 'SB_PERSISTENT_SAMPLES')
AND b.column_name <> 'SYSKEY'
AND a.schema_name = 'SEABASE'
AND a.object_name = 'AAA'
GROUP BY 1,2
;
--字段拼接考虑顺序
SELECT a.schema_name, a.object_name AS table_name, pivot(b.column_name, MAX LENGTH 10240, ORDER BY (b.column_number)) AS column_list
FROM "_MD_".objects a
INNER JOIN "_MD_".columns b ON a.object_uid = b.object_uid
WHERE a.schema_name NOT LIKE '|_BACKUP|_%%|_' ESCAPE '|'
AND a.schema_name NOT IN ('_MD_', '_PRIVMGR_MD_', '_REPOS_', '_LIBMGR_')
AND a.object_type IN ('BT')
AND a.object_name NOT IN ('SB_HISTOGRAMS', 'SB_HISTOGRAM_INTERVALS', 'SB_PERSISTENT_SAMPLES')
AND b.column_name <> 'SYSKEY'
AND a.schema_name = 'SEABASE'
AND a.object_name = 'AAA'
GROUP BY 1,2
;