552 lines
17 KiB
Plaintext
552 lines
17 KiB
Plaintext
--
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-- BIT types
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--
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--
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-- Build tables for testing
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--
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CREATE TABLE BIT_TABLE(b BIT(11));
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INSERT INTO BIT_TABLE VALUES (B'10'); -- too short
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ERROR: bit string length 2 does not match type bit(11)
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INSERT INTO BIT_TABLE VALUES (B'00000000000');
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INSERT INTO BIT_TABLE VALUES (B'11011000000');
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INSERT INTO BIT_TABLE VALUES (B'01010101010');
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INSERT INTO BIT_TABLE VALUES (B'101011111010'); -- too long
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ERROR: bit string length 12 does not match type bit(11)
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--INSERT INTO BIT_TABLE VALUES ('X554');
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--INSERT INTO BIT_TABLE VALUES ('X555');
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SELECT * FROM BIT_TABLE;
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b
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-------------
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00000000000
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11011000000
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01010101010
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(3 rows)
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CREATE TABLE VARBIT_TABLE(v BIT VARYING(11));
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INSERT INTO VARBIT_TABLE VALUES (B'');
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INSERT INTO VARBIT_TABLE VALUES (B'0');
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INSERT INTO VARBIT_TABLE VALUES (B'010101');
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INSERT INTO VARBIT_TABLE VALUES (B'01010101010');
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INSERT INTO VARBIT_TABLE VALUES (B'101011111010'); -- too long
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ERROR: bit string too long for type bit varying(11)
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--INSERT INTO VARBIT_TABLE VALUES ('X554');
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--INSERT INTO VARBIT_TABLE VALUES ('X555');
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SELECT * FROM VARBIT_TABLE;
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v
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-------------
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0
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010101
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01010101010
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(4 rows)
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-- Concatenation
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SELECT v, b, (v || b) AS concat
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FROM BIT_TABLE, VARBIT_TABLE
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ORDER BY 3;
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v | b | concat
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-------------+-------------+------------------------
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| 00000000000 | 00000000000
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0 | 00000000000 | 000000000000
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0 | 01010101010 | 001010101010
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010101 | 00000000000 | 01010100000000000
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| 01010101010 | 01010101010
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01010101010 | 00000000000 | 0101010101000000000000
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01010101010 | 01010101010 | 0101010101001010101010
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010101 | 01010101010 | 01010101010101010
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01010101010 | 11011000000 | 0101010101011011000000
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010101 | 11011000000 | 01010111011000000
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0 | 11011000000 | 011011000000
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| 11011000000 | 11011000000
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(12 rows)
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-- Length
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SELECT b, length(b) AS lb
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FROM BIT_TABLE;
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b | lb
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-------------+----
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00000000000 | 11
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11011000000 | 11
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01010101010 | 11
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(3 rows)
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SELECT v, length(v) AS lv
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FROM VARBIT_TABLE;
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v | lv
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-------------+----
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| 0
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0 | 1
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010101 | 6
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01010101010 | 11
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(4 rows)
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-- Substring
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SELECT b,
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SUBSTRING(b FROM 2 FOR 4) AS sub_2_4,
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SUBSTRING(b FROM 7 FOR 13) AS sub_7_13,
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SUBSTRING(b FROM 6) AS sub_6
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FROM BIT_TABLE;
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b | sub_2_4 | sub_7_13 | sub_6
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-------------+---------+----------+--------
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00000000000 | 0000 | 00000 | 000000
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11011000000 | 1011 | 00000 | 000000
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01010101010 | 1010 | 01010 | 101010
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(3 rows)
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SELECT v,
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SUBSTRING(v FROM 2 FOR 4) AS sub_2_4,
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SUBSTRING(v FROM 7 FOR 13) AS sub_7_13,
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SUBSTRING(v FROM 6) AS sub_6
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FROM VARBIT_TABLE;
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v | sub_2_4 | sub_7_13 | sub_6
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-------------+---------+----------+--------
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| | |
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0 | | |
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010101 | 1010 | | 1
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01010101010 | 1010 | 01010 | 101010
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(4 rows)
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--- Bit operations
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DROP TABLE varbit_table;
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CREATE TABLE varbit_table (a BIT VARYING(16), b BIT VARYING(16));
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COPY varbit_table FROM stdin;
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SELECT a, b, ~a AS "~ a", a & b AS "a & b",
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a | b AS "a | b", a # b AS "a # b" FROM varbit_table;
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a | b | ~ a | a & b | a | b | a # b
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------------------+------------------+------------------+------------------+------------------+------------------
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00001111 | 00010000 | 11110000 | 00000000 | 00011111 | 00011111
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00011111 | 00010001 | 11100000 | 00010001 | 00011111 | 00001110
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00101111 | 00010010 | 11010000 | 00000010 | 00111111 | 00111101
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00111111 | 00010011 | 11000000 | 00010011 | 00111111 | 00101100
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10001111 | 00000100 | 01110000 | 00000100 | 10001111 | 10001011
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0000000000001111 | 0000000000010000 | 1111111111110000 | 0000000000000000 | 0000000000011111 | 0000000000011111
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0000000100100011 | 1111111111111111 | 1111111011011100 | 0000000100100011 | 1111111111111111 | 1111111011011100
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0010010001101000 | 0010010001101000 | 1101101110010111 | 0010010001101000 | 0010010001101000 | 0000000000000000
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1111101001010000 | 0000010110101111 | 0000010110101111 | 0000000000000000 | 1111111111111111 | 1111111111111111
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0001001000110100 | 1111111111110101 | 1110110111001011 | 0001001000110100 | 1111111111110101 | 1110110111000001
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(10 rows)
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SELECT a,b,a<b AS "a<b",a<=b AS "a<=b",a=b AS "a=b",
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a>=b AS "a>=b",a>b AS "a>b",a<>b AS "a<>b" FROM varbit_table;
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a | b | a<b | a<=b | a=b | a>=b | a>b | a<>b
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------------------+------------------+-----+------+-----+------+-----+------
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00001111 | 00010000 | t | t | f | f | f | t
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00011111 | 00010001 | f | f | f | t | t | t
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00101111 | 00010010 | f | f | f | t | t | t
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00111111 | 00010011 | f | f | f | t | t | t
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10001111 | 00000100 | f | f | f | t | t | t
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0000000000001111 | 0000000000010000 | t | t | f | f | f | t
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0000000100100011 | 1111111111111111 | t | t | f | f | f | t
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0010010001101000 | 0010010001101000 | f | t | t | t | f | f
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1111101001010000 | 0000010110101111 | f | f | f | t | t | t
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0001001000110100 | 1111111111110101 | t | t | f | f | f | t
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(10 rows)
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SELECT a,a<<4 AS "a<<4",b,b>>2 AS "b>>2" FROM varbit_table;
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a | a<<4 | b | b>>2
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------------------+------------------+------------------+------------------
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00001111 | 11110000 | 00010000 | 00000100
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00011111 | 11110000 | 00010001 | 00000100
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00101111 | 11110000 | 00010010 | 00000100
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00111111 | 11110000 | 00010011 | 00000100
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10001111 | 11110000 | 00000100 | 00000001
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0000000000001111 | 0000000011110000 | 0000000000010000 | 0000000000000100
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0000000100100011 | 0001001000110000 | 1111111111111111 | 0011111111111111
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0010010001101000 | 0100011010000000 | 0010010001101000 | 0000100100011010
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1111101001010000 | 1010010100000000 | 0000010110101111 | 0000000101101011
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0001001000110100 | 0010001101000000 | 1111111111110101 | 0011111111111101
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(10 rows)
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DROP TABLE varbit_table;
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--- Bit operations
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DROP TABLE bit_table;
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CREATE TABLE bit_table (a BIT(16), b BIT(16));
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COPY bit_table FROM stdin;
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SELECT a,b,~a AS "~ a",a & b AS "a & b",
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a|b AS "a | b", a # b AS "a # b" FROM bit_table;
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a | b | ~ a | a & b | a | b | a # b
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------------------+------------------+------------------+------------------+------------------+------------------
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0000111100000000 | 0001000000000000 | 1111000011111111 | 0000000000000000 | 0001111100000000 | 0001111100000000
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0001111100000000 | 0001000100000000 | 1110000011111111 | 0001000100000000 | 0001111100000000 | 0000111000000000
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0010111100000000 | 0001001000000000 | 1101000011111111 | 0000001000000000 | 0011111100000000 | 0011110100000000
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0011111100000000 | 0001001100000000 | 1100000011111111 | 0001001100000000 | 0011111100000000 | 0010110000000000
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1000111100000000 | 0000010000000000 | 0111000011111111 | 0000010000000000 | 1000111100000000 | 1000101100000000
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0000000000001111 | 0000000000010000 | 1111111111110000 | 0000000000000000 | 0000000000011111 | 0000000000011111
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0000000100100011 | 1111111111111111 | 1111111011011100 | 0000000100100011 | 1111111111111111 | 1111111011011100
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0010010001101000 | 0010010001101000 | 1101101110010111 | 0010010001101000 | 0010010001101000 | 0000000000000000
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1111101001010000 | 0000010110101111 | 0000010110101111 | 0000000000000000 | 1111111111111111 | 1111111111111111
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0001001000110100 | 1111111111110101 | 1110110111001011 | 0001001000110100 | 1111111111110101 | 1110110111000001
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(10 rows)
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SELECT a,b,a<b AS "a<b",a<=b AS "a<=b",a=b AS "a=b",
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a>=b AS "a>=b",a>b AS "a>b",a<>b AS "a<>b" FROM bit_table;
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a | b | a<b | a<=b | a=b | a>=b | a>b | a<>b
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------------------+------------------+-----+------+-----+------+-----+------
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0000111100000000 | 0001000000000000 | t | t | f | f | f | t
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0001111100000000 | 0001000100000000 | f | f | f | t | t | t
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0010111100000000 | 0001001000000000 | f | f | f | t | t | t
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0011111100000000 | 0001001100000000 | f | f | f | t | t | t
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1000111100000000 | 0000010000000000 | f | f | f | t | t | t
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0000000000001111 | 0000000000010000 | t | t | f | f | f | t
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0000000100100011 | 1111111111111111 | t | t | f | f | f | t
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0010010001101000 | 0010010001101000 | f | t | t | t | f | f
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1111101001010000 | 0000010110101111 | f | f | f | t | t | t
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0001001000110100 | 1111111111110101 | t | t | f | f | f | t
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(10 rows)
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SELECT a,a<<4 AS "a<<4",b,b>>2 AS "b>>2" FROM bit_table;
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a | a<<4 | b | b>>2
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------------------+------------------+------------------+------------------
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0000111100000000 | 1111000000000000 | 0001000000000000 | 0000010000000000
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0001111100000000 | 1111000000000000 | 0001000100000000 | 0000010001000000
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0010111100000000 | 1111000000000000 | 0001001000000000 | 0000010010000000
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0011111100000000 | 1111000000000000 | 0001001100000000 | 0000010011000000
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1000111100000000 | 1111000000000000 | 0000010000000000 | 0000000100000000
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0000000000001111 | 0000000011110000 | 0000000000010000 | 0000000000000100
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0000000100100011 | 0001001000110000 | 1111111111111111 | 0011111111111111
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0010010001101000 | 0100011010000000 | 0010010001101000 | 0000100100011010
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1111101001010000 | 1010010100000000 | 0000010110101111 | 0000000101101011
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0001001000110100 | 0010001101000000 | 1111111111110101 | 0011111111111101
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(10 rows)
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DROP TABLE bit_table;
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-- The following should fail
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select B'001' & B'10';
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ERROR: cannot AND bit strings of different sizes
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select B'0111' | B'011';
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ERROR: cannot OR bit strings of different sizes
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select B'0010' # B'011101';
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ERROR: cannot XOR bit strings of different sizes
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-- More position tests, checking all the boundary cases
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SELECT POSITION(B'1010' IN B'0000101'); -- 0
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position
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----------
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0
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(1 row)
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SELECT POSITION(B'1010' IN B'00001010'); -- 5
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position
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----------
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5
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(1 row)
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SELECT POSITION(B'1010' IN B'00000101'); -- 0
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position
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----------
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0
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(1 row)
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SELECT POSITION(B'1010' IN B'000001010'); -- 6
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position
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----------
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6
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(1 row)
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SELECT POSITION(B'' IN B'00001010'); -- 1
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position
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----------
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1
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(1 row)
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SELECT POSITION(B'0' IN B''); -- 0
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position
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----------
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0
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(1 row)
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SELECT POSITION(B'' IN B''); -- 0
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position
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----------
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0
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(1 row)
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SELECT POSITION(B'101101' IN B'001011011011011000'); -- 3
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position
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----------
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3
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(1 row)
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SELECT POSITION(B'10110110' IN B'001011011011010'); -- 3
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position
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----------
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3
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(1 row)
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SELECT POSITION(B'1011011011011' IN B'001011011011011'); -- 3
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position
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----------
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3
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(1 row)
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SELECT POSITION(B'1011011011011' IN B'00001011011011011'); -- 5
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position
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----------
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5
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(1 row)
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SELECT POSITION(B'11101011' IN B'11101011'); -- 1
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position
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----------
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1
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(1 row)
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SELECT POSITION(B'11101011' IN B'011101011'); -- 2
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position
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----------
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2
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(1 row)
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SELECT POSITION(B'11101011' IN B'00011101011'); -- 4
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position
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----------
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4
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(1 row)
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SELECT POSITION(B'11101011' IN B'0000011101011'); -- 6
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position
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----------
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6
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(1 row)
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SELECT POSITION(B'111010110' IN B'111010110'); -- 1
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position
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----------
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1
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(1 row)
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SELECT POSITION(B'111010110' IN B'0111010110'); -- 2
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position
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----------
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2
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(1 row)
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SELECT POSITION(B'111010110' IN B'000111010110'); -- 4
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position
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----------
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4
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(1 row)
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SELECT POSITION(B'111010110' IN B'00000111010110'); -- 6
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position
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----------
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6
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(1 row)
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SELECT POSITION(B'111010110' IN B'11101011'); -- 0
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position
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----------
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0
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(1 row)
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SELECT POSITION(B'111010110' IN B'011101011'); -- 0
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position
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----------
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0
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(1 row)
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SELECT POSITION(B'111010110' IN B'00011101011'); -- 0
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position
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----------
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0
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(1 row)
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SELECT POSITION(B'111010110' IN B'0000011101011'); -- 0
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position
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----------
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0
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(1 row)
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SELECT POSITION(B'111010110' IN B'111010110'); -- 1
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position
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----------
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1
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(1 row)
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SELECT POSITION(B'111010110' IN B'0111010110'); -- 2
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position
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----------
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2
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(1 row)
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SELECT POSITION(B'111010110' IN B'000111010110'); -- 4
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position
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----------
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4
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(1 row)
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SELECT POSITION(B'111010110' IN B'00000111010110'); -- 6
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position
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----------
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6
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(1 row)
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SELECT POSITION(B'111010110' IN B'000001110101111101011'); -- 0
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position
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----------
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0
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(1 row)
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SELECT POSITION(B'111010110' IN B'0000001110101111101011'); -- 0
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position
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----------
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0
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(1 row)
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SELECT POSITION(B'111010110' IN B'000000001110101111101011'); -- 0
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position
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----------
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0
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(1 row)
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SELECT POSITION(B'111010110' IN B'00000000001110101111101011'); -- 0
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position
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----------
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0
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(1 row)
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SELECT POSITION(B'111010110' IN B'0000011101011111010110'); -- 14
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position
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----------
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14
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(1 row)
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SELECT POSITION(B'111010110' IN B'00000011101011111010110'); -- 15
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position
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----------
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15
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(1 row)
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SELECT POSITION(B'111010110' IN B'0000000011101011111010110'); -- 17
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position
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----------
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17
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(1 row)
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SELECT POSITION(B'111010110' IN B'000000000011101011111010110'); -- 19
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position
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----------
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19
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(1 row)
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SELECT POSITION(B'000000000011101011111010110' IN B'000000000011101011111010110'); -- 1
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position
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----------
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1
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(1 row)
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SELECT POSITION(B'00000000011101011111010110' IN B'000000000011101011111010110'); -- 2
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position
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----------
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2
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(1 row)
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SELECT POSITION(B'0000000000011101011111010110' IN B'000000000011101011111010110'); -- 0
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position
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----------
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0
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(1 row)
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-- Shifting
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CREATE TABLE BIT_SHIFT_TABLE(b BIT(16));
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INSERT INTO BIT_SHIFT_TABLE VALUES (B'1101100000000000');
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INSERT INTO BIT_SHIFT_TABLE SELECT b>>1 FROM BIT_SHIFT_TABLE;
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INSERT INTO BIT_SHIFT_TABLE SELECT b>>2 FROM BIT_SHIFT_TABLE;
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INSERT INTO BIT_SHIFT_TABLE SELECT b>>4 FROM BIT_SHIFT_TABLE;
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INSERT INTO BIT_SHIFT_TABLE SELECT b>>8 FROM BIT_SHIFT_TABLE;
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SELECT POSITION(B'1101' IN b),
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POSITION(B'11011' IN b),
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b
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FROM BIT_SHIFT_TABLE ;
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position | position | b
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----------+----------+------------------
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1 | 1 | 1101100000000000
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2 | 2 | 0110110000000000
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3 | 3 | 0011011000000000
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4 | 4 | 0001101100000000
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5 | 5 | 0000110110000000
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6 | 6 | 0000011011000000
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7 | 7 | 0000001101100000
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8 | 8 | 0000000110110000
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9 | 9 | 0000000011011000
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10 | 10 | 0000000001101100
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11 | 11 | 0000000000110110
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12 | 12 | 0000000000011011
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13 | 0 | 0000000000001101
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0 | 0 | 0000000000000110
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0 | 0 | 0000000000000011
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0 | 0 | 0000000000000001
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(16 rows)
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CREATE TABLE VARBIT_SHIFT_TABLE(v BIT VARYING(20));
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INSERT INTO VARBIT_SHIFT_TABLE VALUES (B'11011');
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INSERT INTO VARBIT_SHIFT_TABLE SELECT CAST(v || B'0' AS BIT VARYING(6)) >>1 FROM VARBIT_SHIFT_TABLE;
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INSERT INTO VARBIT_SHIFT_TABLE SELECT CAST(v || B'00' AS BIT VARYING(8)) >>2 FROM VARBIT_SHIFT_TABLE;
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INSERT INTO VARBIT_SHIFT_TABLE SELECT CAST(v || B'0000' AS BIT VARYING(12)) >>4 FROM VARBIT_SHIFT_TABLE;
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INSERT INTO VARBIT_SHIFT_TABLE SELECT CAST(v || B'00000000' AS BIT VARYING(20)) >>8 FROM VARBIT_SHIFT_TABLE;
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SELECT POSITION(B'1101' IN v),
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POSITION(B'11011' IN v),
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v
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FROM VARBIT_SHIFT_TABLE ;
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position | position | v
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----------+----------+----------------------
|
|
1 | 1 | 11011
|
|
2 | 2 | 011011
|
|
3 | 3 | 0011011
|
|
4 | 4 | 00011011
|
|
5 | 5 | 000011011
|
|
6 | 6 | 0000011011
|
|
7 | 7 | 00000011011
|
|
8 | 8 | 000000011011
|
|
9 | 9 | 0000000011011
|
|
10 | 10 | 00000000011011
|
|
11 | 11 | 000000000011011
|
|
12 | 12 | 0000000000011011
|
|
13 | 13 | 00000000000011011
|
|
14 | 14 | 000000000000011011
|
|
15 | 15 | 0000000000000011011
|
|
16 | 16 | 00000000000000011011
|
|
(16 rows)
|
|
|
|
DROP TABLE BIT_SHIFT_TABLE;
|
|
DROP TABLE VARBIT_SHIFT_TABLE;
|
|
-- Get/Set bit
|
|
SELECT get_bit(B'0101011000100', 10);
|
|
get_bit
|
|
---------
|
|
1
|
|
(1 row)
|
|
|
|
SELECT set_bit(B'0101011000100100', 15, 1);
|
|
set_bit
|
|
------------------
|
|
0101011000100101
|
|
(1 row)
|
|
|
|
SELECT set_bit(B'0101011000100100', 16, 1); -- fail
|
|
ERROR: bit index 16 out of valid range (0..15)
|
|
-- Overlay
|
|
SELECT overlay(B'0101011100' placing '001' from 2 for 3);
|
|
overlay
|
|
------------
|
|
0001011100
|
|
(1 row)
|
|
|
|
SELECT overlay(B'0101011100' placing '101' from 6);
|
|
overlay
|
|
------------
|
|
0101010100
|
|
(1 row)
|
|
|
|
SELECT overlay(B'0101011100' placing '001' from 11);
|
|
overlay
|
|
---------------
|
|
0101011100001
|
|
(1 row)
|
|
|
|
SELECT overlay(B'0101011100' placing '001' from 20);
|
|
overlay
|
|
---------------
|
|
0101011100001
|
|
(1 row)
|
|
|