Sudip Mukherjee created DRILL-4294:
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Summary: InfoSchema is not returning column metadata if the query
contains escape character
Key: DRILL-4294
URL: https://issues.apache.org/jira/browse/DRILL-4294
Project: Apache Drill
Issue Type: Bug
Affects Versions: Future, 1.4.0
Reporter: Sudip Mukherjee
Below Query returns noting where escape character is "\\":
SELECT TABLE_CATALOG, TABLE_SCHEMA, TABLE_NAME, COLUMN_NAME, CASE DATA_TYPE
WHEN 'ANY', 'MAP' THEN 'CHARACTER VARYING' ELSE DATA_TYPE END as DATA_TYPE,
CASE DATA_TYPE WHEN 'ANY', 'MAP' THEN 'CHARACTER VARYING' ELSE DATA_TYPE END as
DATA_TYPE_NAME, CASE DATA_TYPE WHEN 'BINARY' THEN
CHARACTER_MAXIMUM_LENGTH WHEN 'CHARACTER VARYING' THEN
CHARACTER_MAXIMUM_LENGTH WHEN 'CHARACTER' THEN
CHARACTER_MAXIMUM_LENGTH WHEN 'DATE' THEN DATETIME_PRECISION
WHEN 'INTERVAL' THEN INTERVAL_PRECISION WHEN 'VARCHAR' THEN
CHARACTER_MAXIMUM_LENGTH WHEN 'VARBINARY' THEN
CHARACTER_MAXIMUM_LENGTH ELSE NUMERIC_PRECISION END as
COLUMN_SIZE, NUMERIC_SCALE as DECIMAL_DIGITS, CASE DATA_TYPE
WHEN 'CHARACTER VARYING' THEN CHARACTER_MAXIMUM_LENGTH
WHEN 'CHARACTER' THEN CHARACTER_MAXIMUM_LENGTH WHEN 'VARCHAR' THEN
CHARACTER_MAXIMUM_LENGTH ELSE 9 END as BUFFER_LENGTH,
NUMERIC_PRECISION_RADIX, IS_NULLABLE as NULLABLE, 12 as
REMARKS, 13 as COLUMN_DEF, 14 as SQL_DATA_TYPE, 15 as
SQL_DATETIME_SUB, CHARACTER_MAXIMUM_LENGTH as CHAR_OCTET_LENGTH,
ORDINAL_POSITION, IS_NULLABLE, 18 as USER_DATA_TYPE FROM
INFORMATION_SCHEMA.COLUMNS WHERE TABLE_CATALOG LIKE 'DRILL' ESCAPE '\' AND
TABLE_SCHEMA LIKE 'dfs.tmp' ESCAPE '\' AND TABLE_NAME LIKE 'app\_client\_view'
ESCAPE '\' ORDER BY TABLE_CATALOG, TABLE_SCHEMA, TABLE_NAME, ORDINAL_POSITION,
COLUMN_NAME
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