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DatabaseMetaData_GetColumns.sql
84 lines (83 loc) · 3.13 KB
/
DatabaseMetaData_GetColumns.sql
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/*
* Copyright 2019 Google LLC
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
SELECT TABLE_CATALOG AS TABLE_CAT, TABLE_SCHEMA AS TABLE_SCHEM, TABLE_NAME, COLUMN_NAME,
CASE
WHEN SPANNER_TYPE LIKE 'ARRAY%' THEN 2003
WHEN SPANNER_TYPE = 'BOOL' THEN 16
WHEN SPANNER_TYPE LIKE 'BYTES%' THEN -2
WHEN SPANNER_TYPE = 'DATE' THEN 91
WHEN SPANNER_TYPE = 'FLOAT64' THEN 8
WHEN SPANNER_TYPE = 'INT64' THEN -5
WHEN SPANNER_TYPE = 'NUMERIC' THEN 2
WHEN SPANNER_TYPE LIKE 'STRING%' THEN -9
WHEN SPANNER_TYPE = 'TIMESTAMP' THEN 93
END AS DATA_TYPE,
SPANNER_TYPE AS TYPE_NAME,
CASE
WHEN STRPOS(SPANNER_TYPE, '(')=0 THEN
CASE
WHEN SPANNER_TYPE = 'INT64' OR SPANNER_TYPE = 'ARRAY<INT64>' THEN 19
WHEN SPANNER_TYPE = 'NUMERIC' OR SPANNER_TYPE = 'ARRAY<NUMERIC>' THEN 15
WHEN SPANNER_TYPE = 'FLOAT64' OR SPANNER_TYPE = 'ARRAY<FLOAT64>' THEN 15
WHEN SPANNER_TYPE = 'BOOL' OR SPANNER_TYPE = 'ARRAY<BOOL>' THEN NULL
WHEN SPANNER_TYPE = 'DATE' OR SPANNER_TYPE = 'ARRAY<DATE>' THEN 10
WHEN SPANNER_TYPE = 'TIMESTAMP' OR SPANNER_TYPE = 'ARRAY<TIMESTAMP>' THEN 35
ELSE 0
END
ELSE CAST(REPLACE(SUBSTR(SPANNER_TYPE, STRPOS(SPANNER_TYPE, '(')+1, STRPOS(SPANNER_TYPE, ')')-STRPOS(SPANNER_TYPE, '(')-1), 'MAX', CASE WHEN UPPER(SPANNER_TYPE) LIKE '%STRING%' THEN '2621440' ELSE '10485760' END) AS INT64)
END AS COLUMN_SIZE,
0 AS BUFFER_LENGTH,
CASE
WHEN SPANNER_TYPE LIKE '%FLOAT64%' THEN 16
ELSE NULL
END AS DECIMAL_DIGITS,
CASE
WHEN SPANNER_TYPE LIKE '%INT64%' THEN 10
WHEN SPANNER_TYPE LIKE '%NUMERIC%' THEN 10
WHEN SPANNER_TYPE LIKE '%FLOAT64%' THEN 2
ELSE NULL
END AS NUM_PREC_RADIX,
CASE
WHEN IS_NULLABLE = 'YES' THEN 1
WHEN IS_NULLABLE = 'NO' THEN 0
ELSE 2
END AS NULLABLE,
NULL AS REMARKS,
NULL AS COLUMN_DEF,
0 AS SQL_DATA_TYPE,
0 AS SQL_DATETIME_SUB,
CASE
WHEN (SPANNER_TYPE LIKE 'STRING%' OR SPANNER_TYPE LIKE 'ARRAY<STRING%') THEN
cast(replace(substr(spanner_type, strpos(spanner_type, '(')+1, strpos(spanner_type,')')-strpos(spanner_type, '(')-1), 'MAX', '2621440') as INT64)
ELSE NULL
END AS CHAR_OCTET_LENGTH,
ORDINAL_POSITION,
IS_NULLABLE,
NULL AS SCOPE_CATALOG,
NULL AS SCOPE_SCHEMA,
NULL AS SCOPE_TABLE,
NULL AS SOURCE_DATA_TYPE,
'NO' AS IS_AUTOINCREMENT,
CASE
WHEN (IS_GENERATED = 'NEVER') THEN 'NO'
ELSE 'YES'
END AS IS_GENERATEDCOLUMN
FROM INFORMATION_SCHEMA.COLUMNS C
WHERE UPPER(C.TABLE_CATALOG) LIKE ?
AND UPPER(C.TABLE_SCHEMA) LIKE ?
AND UPPER(C.TABLE_NAME) LIKE ?
AND UPPER(C.COLUMN_NAME) LIKE ?
ORDER BY TABLE_CATALOG, TABLE_SCHEMA, TABLE_NAME, ORDINAL_POSITION