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3b9d2deb67
Convert the remaining string-category input functions (bpcharin, varcharin, byteain) to the new style. Discussion: https://postgr.es/m/3038346.1671060258@sss.pgh.pa.us
94 lines
1.9 KiB
SQL
94 lines
1.9 KiB
SQL
--
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-- CHAR
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--
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-- Per SQL standard, CHAR means character(1), that is a varlena type
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-- with a constraint restricting it to one character (not byte)
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SELECT char 'c' = char 'c' AS true;
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--
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-- Build a table for testing
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-- (This temporarily hides the table created in test_setup.sql)
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--
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CREATE TEMP TABLE CHAR_TBL(f1 char);
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INSERT INTO CHAR_TBL (f1) VALUES ('a');
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INSERT INTO CHAR_TBL (f1) VALUES ('A');
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-- any of the following three input formats are acceptable
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INSERT INTO CHAR_TBL (f1) VALUES ('1');
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INSERT INTO CHAR_TBL (f1) VALUES (2);
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INSERT INTO CHAR_TBL (f1) VALUES ('3');
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-- zero-length char
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INSERT INTO CHAR_TBL (f1) VALUES ('');
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-- try char's of greater than 1 length
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INSERT INTO CHAR_TBL (f1) VALUES ('cd');
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INSERT INTO CHAR_TBL (f1) VALUES ('c ');
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SELECT * FROM CHAR_TBL;
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SELECT c.*
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FROM CHAR_TBL c
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WHERE c.f1 <> 'a';
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SELECT c.*
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FROM CHAR_TBL c
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WHERE c.f1 = 'a';
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SELECT c.*
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FROM CHAR_TBL c
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WHERE c.f1 < 'a';
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SELECT c.*
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FROM CHAR_TBL c
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WHERE c.f1 <= 'a';
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SELECT c.*
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FROM CHAR_TBL c
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WHERE c.f1 > 'a';
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SELECT c.*
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FROM CHAR_TBL c
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WHERE c.f1 >= 'a';
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DROP TABLE CHAR_TBL;
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--
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-- Now test longer arrays of char
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--
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-- This char_tbl was already created and filled in test_setup.sql.
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-- Here we just try to insert bad values.
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--
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INSERT INTO CHAR_TBL (f1) VALUES ('abcde');
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SELECT * FROM CHAR_TBL;
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-- Also try it with non-error-throwing API
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SELECT pg_input_is_valid('abcd ', 'char(4)');
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SELECT pg_input_is_valid('abcde', 'char(4)');
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SELECT pg_input_error_message('abcde', 'char(4)');
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--
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-- Also test "char", which is an ad-hoc one-byte type. It can only
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-- really store ASCII characters, but we allow high-bit-set characters
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-- to be accessed via bytea-like escapes.
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--
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SELECT 'a'::"char";
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SELECT '\101'::"char";
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SELECT '\377'::"char";
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SELECT 'a'::"char"::text;
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SELECT '\377'::"char"::text;
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SELECT '\000'::"char"::text;
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SELECT 'a'::text::"char";
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SELECT '\377'::text::"char";
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SELECT ''::text::"char";
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