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# name: test/sql/copy/csv/test_header_only.test
# description: Test CSV Parser on an header only CSV file
# group: [csv]
statement ok
PRAGMA enable_verification
query I
SELECT columns from sniff_csv('{DATA_DIR}/csv/header_only.csv', header=True, ignore_errors=True)
----
[{'name': abs_file_name, 'type': VARCHAR}]
query I
SELECT abs_file_name FROM read_csv('{DATA_DIR}/csv/header_only.csv', header=True, ignore_errors=True)
----
query I
SELECT REGEXP_MATCHES(abs_file_name, 'foo')
FROM ( SELECT abs_file_name FROM read_csv('{DATA_DIR}/csv/header_only.csv', header=True, ignore_errors=True))
----
query I
SELECT REGEXP_MATCHES(abs_file_name, 'foo')
FROM ( SELECT abs_file_name FROM read_csv(['{DATA_DIR}/csv/header_only.csv','{DATA_DIR}/csv/header_only.csv'], header=True, ignore_errors=True))
----
statement error
SELECT REGEXP_MATCHES(abs_file_name, 'foo')
FROM ( SELECT abs_file_name FROM read_csv(['{DATA_DIR}/csv/header_only.csv','{DATA_DIR}/csv/bool.csv','{DATA_DIR}/csv/header_only.csv'], header=True, ignore_errors=True))
----
No function matches the given name and argument types 'regexp_matches(BOOLEAN, STRING_LITERAL)'. You might need to add explicit type casts.
# Try to replace column type
query I
SELECT columns from sniff_csv('{DATA_DIR}/csv/header_only.csv', types = ['INTEGER'])
----
[{'name': abs_file_name, 'type': INTEGER}]
query I
SELECT columns from sniff_csv('{DATA_DIR}/csv/header_only.csv', types = {'abs_file_name':'INTEGER'})
----
[{'name': abs_file_name, 'type': INTEGER}]
statement ok
CREATE TABLE T AS from read_csv('{DATA_DIR}/csv/header_only.csv',types = ['INTEGER'])
query IIIIII
DESCRIBE T
----
abs_file_name INTEGER YES NULL NULL NULL
statement ok
CREATE OR REPLACE TABLE T AS from read_csv('{DATA_DIR}/csv/header_only.csv', types = {'abs_file_name':'INTEGER'})
query IIIIII
DESCRIBE T
----
abs_file_name INTEGER YES NULL NULL NULL
# Now with two columns
query I
SELECT columns from sniff_csv('{DATA_DIR}/csv/header_only_2.csv', types = ['INTEGER'])
----
[{'name': foo, 'type': INTEGER}, {'name': bar, 'type': VARCHAR}]
query I
SELECT columns from sniff_csv('{DATA_DIR}/csv/header_only_2.csv', types = {'foo':'INTEGER'})
----
[{'name': foo, 'type': INTEGER}, {'name': bar, 'type': VARCHAR}]
# This is clearly wrong
query I
SELECT columns from sniff_csv('{DATA_DIR}/csv/header_only_2.csv', types = {'bar':'INTEGER'})
----
[{'name': foo, 'type': VARCHAR}, {'name': bar, 'type': INTEGER}]
statement ok
CREATE OR REPLACE TABLE T AS from read_csv('{DATA_DIR}/csv/header_only_2.csv', types = ['INTEGER'])
query IIIIII
DESCRIBE T
----
foo INTEGER YES NULL NULL NULL
bar VARCHAR YES NULL NULL NULL
statement ok
CREATE OR REPLACE TABLE T AS from read_csv('{DATA_DIR}/csv/header_only_2.csv', types = {'foo':'INTEGER'})
query IIIIII
DESCRIBE T
----
foo INTEGER YES NULL NULL NULL
bar VARCHAR YES NULL NULL NULL
statement ok
CREATE OR REPLACE TABLE T AS from read_csv('{DATA_DIR}/csv/header_only_2.csv', types = {'bar':'INTEGER'})
query IIIIII
DESCRIBE T
----
foo VARCHAR YES NULL NULL NULL
bar INTEGER YES NULL NULL NULL
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