-- -- BIT types -- -- -- Build tables for testing -- CREATE TABLE BIT_TABLE(b BIT(11)); INSERT INTO BIT_TABLE VALUES (B'10'); -- too short INSERT INTO BIT_TABLE VALUES (B'00000000000'); INSERT INTO BIT_TABLE VALUES (B'11011000000'); INSERT INTO BIT_TABLE VALUES (B'01010101010'); INSERT INTO BIT_TABLE VALUES (B'101011111010'); -- too long --INSERT INTO BIT_TABLE VALUES ('X554'); --INSERT INTO BIT_TABLE VALUES ('X555'); SELECT * FROM BIT_TABLE; CREATE TABLE VARBIT_TABLE(v BIT VARYING(11)); INSERT INTO VARBIT_TABLE VALUES (B''); INSERT INTO VARBIT_TABLE VALUES (B'0'); INSERT INTO VARBIT_TABLE VALUES (B'010101'); INSERT INTO VARBIT_TABLE VALUES (B'01010101010'); INSERT INTO VARBIT_TABLE VALUES (B'101011111010'); -- too long --INSERT INTO VARBIT_TABLE VALUES ('X554'); --INSERT INTO VARBIT_TABLE VALUES ('X555'); SELECT * FROM VARBIT_TABLE; -- Concatenation SELECT v, b, (v || b) AS concat FROM BIT_TABLE, VARBIT_TABLE ORDER BY 3; -- Length SELECT b, length(b) AS lb FROM BIT_TABLE; SELECT v, length(v) AS lv FROM VARBIT_TABLE; -- Substring SELECT b, SUBSTRING(b FROM 2 FOR 4) AS sub_2_4, SUBSTRING(b FROM 7 FOR 13) AS sub_7_13, SUBSTRING(b FROM 6) AS sub_6 FROM BIT_TABLE; SELECT v, SUBSTRING(v FROM 2 FOR 4) AS sub_2_4, SUBSTRING(v FROM 7 FOR 13) AS sub_7_13, SUBSTRING(v FROM 6) AS sub_6 FROM VARBIT_TABLE; --- Bit operations DROP TABLE varbit_table; CREATE TABLE varbit_table (a BIT VARYING(16), b BIT VARYING(16)); COPY varbit_table FROM stdin; X0F X10 X1F X11 X2F X12 X3F X13 X8F X04 X000F X0010 X0123 XFFFF X2468 X2468 XFA50 X05AF X1234 XFFF5 \. SELECT a, b, ~a AS "~ a", a & b AS "a & b", a | b AS "a | b", a # b AS "a # b" FROM varbit_table; SELECT a,b,a=b AS "a>=b",a>b AS "a>b",a<>b AS "a<>b" FROM varbit_table; SELECT a,a<<4 AS "a<<4",b,b>>2 AS "b>>2" FROM varbit_table; DROP TABLE varbit_table; --- Bit operations DROP TABLE bit_table; CREATE TABLE bit_table (a BIT(16), b BIT(16)); COPY bit_table FROM stdin; X0F00 X1000 X1F00 X1100 X2F00 X1200 X3F00 X1300 X8F00 X0400 X000F X0010 X0123 XFFFF X2468 X2468 XFA50 X05AF X1234 XFFF5 \. SELECT a,b,~a AS "~ a",a & b AS "a & b", a|b AS "a | b", a # b AS "a # b" FROM bit_table; SELECT a,b,a=b AS "a>=b",a>b AS "a>b",a<>b AS "a<>b" FROM bit_table; SELECT a,a<<4 AS "a<<4",b,b>>2 AS "b>>2" FROM bit_table; DROP TABLE bit_table; -- The following should fail select B'001' & B'10'; select B'0111' | B'011'; select B'0010' # B'011101'; -- More position tests, checking all the boundary cases SELECT POSITION(B'1010' IN B'0000101'); -- 0 SELECT POSITION(B'1010' IN B'00001010'); -- 5 SELECT POSITION(B'1010' IN B'00000101'); -- 0 SELECT POSITION(B'1010' IN B'000001010'); -- 6 SELECT POSITION(B'' IN B'00001010'); -- 1 SELECT POSITION(B'0' IN B''); -- 0 SELECT POSITION(B'' IN B''); -- 0 SELECT POSITION(B'101101' IN B'001011011011011000'); -- 3 SELECT POSITION(B'10110110' IN B'001011011011010'); -- 3 SELECT POSITION(B'1011011011011' IN B'001011011011011'); -- 3 SELECT POSITION(B'1011011011011' IN B'00001011011011011'); -- 5 SELECT POSITION(B'11101011' IN B'11101011'); -- 1 SELECT POSITION(B'11101011' IN B'011101011'); -- 2 SELECT POSITION(B'11101011' IN B'00011101011'); -- 4 SELECT POSITION(B'11101011' IN B'0000011101011'); -- 6 SELECT POSITION(B'111010110' IN B'111010110'); -- 1 SELECT POSITION(B'111010110' IN B'0111010110'); -- 2 SELECT POSITION(B'111010110' IN B'000111010110'); -- 4 SELECT POSITION(B'111010110' IN B'00000111010110'); -- 6 SELECT POSITION(B'111010110' IN B'11101011'); -- 0 SELECT POSITION(B'111010110' IN B'011101011'); -- 0 SELECT POSITION(B'111010110' IN B'00011101011'); -- 0 SELECT POSITION(B'111010110' IN B'0000011101011'); -- 0 SELECT POSITION(B'111010110' IN B'111010110'); -- 1 SELECT POSITION(B'111010110' IN B'0111010110'); -- 2 SELECT POSITION(B'111010110' IN B'000111010110'); -- 4 SELECT POSITION(B'111010110' IN B'00000111010110'); -- 6 SELECT POSITION(B'111010110' IN B'000001110101111101011'); -- 0 SELECT POSITION(B'111010110' IN B'0000001110101111101011'); -- 0 SELECT POSITION(B'111010110' IN B'000000001110101111101011'); -- 0 SELECT POSITION(B'111010110' IN B'00000000001110101111101011'); -- 0 SELECT POSITION(B'111010110' IN B'0000011101011111010110'); -- 14 SELECT POSITION(B'111010110' IN B'00000011101011111010110'); -- 15 SELECT POSITION(B'111010110' IN B'0000000011101011111010110'); -- 17 SELECT POSITION(B'111010110' IN B'000000000011101011111010110'); -- 19 SELECT POSITION(B'000000000011101011111010110' IN B'000000000011101011111010110'); -- 1 SELECT POSITION(B'00000000011101011111010110' IN B'000000000011101011111010110'); -- 2 SELECT POSITION(B'0000000000011101011111010110' IN B'000000000011101011111010110'); -- 0 -- Shifting CREATE TABLE BIT_SHIFT_TABLE(b BIT(16)); INSERT INTO BIT_SHIFT_TABLE VALUES (B'1101100000000000'); INSERT INTO BIT_SHIFT_TABLE SELECT b>>1 FROM BIT_SHIFT_TABLE; INSERT INTO BIT_SHIFT_TABLE SELECT b>>2 FROM BIT_SHIFT_TABLE; INSERT INTO BIT_SHIFT_TABLE SELECT b>>4 FROM BIT_SHIFT_TABLE; INSERT INTO BIT_SHIFT_TABLE SELECT b>>8 FROM BIT_SHIFT_TABLE; SELECT POSITION(B'1101' IN b), POSITION(B'11011' IN b), b FROM BIT_SHIFT_TABLE ; SELECT b, b >> 1 AS bsr, b << 1 AS bsl FROM BIT_SHIFT_TABLE ; SELECT b, b >> 8 AS bsr8, b << 8 AS bsl8 FROM BIT_SHIFT_TABLE ; SELECT b::bit(15), b::bit(15) >> 1 AS bsr, b::bit(15) << 1 AS bsl FROM BIT_SHIFT_TABLE ; SELECT b::bit(15), b::bit(15) >> 8 AS bsr8, b::bit(15) << 8 AS bsl8 FROM BIT_SHIFT_TABLE ; CREATE TABLE VARBIT_SHIFT_TABLE(v BIT VARYING(20)); INSERT INTO VARBIT_SHIFT_TABLE VALUES (B'11011'); INSERT INTO VARBIT_SHIFT_TABLE SELECT CAST(v || B'0' AS BIT VARYING(6)) >>1 FROM VARBIT_SHIFT_TABLE; INSERT INTO VARBIT_SHIFT_TABLE SELECT CAST(v || B'00' AS BIT VARYING(8)) >>2 FROM VARBIT_SHIFT_TABLE; INSERT INTO VARBIT_SHIFT_TABLE SELECT CAST(v || B'0000' AS BIT VARYING(12)) >>4 FROM VARBIT_SHIFT_TABLE; INSERT INTO VARBIT_SHIFT_TABLE SELECT CAST(v || B'00000000' AS BIT VARYING(20)) >>8 FROM VARBIT_SHIFT_TABLE; SELECT POSITION(B'1101' IN v), POSITION(B'11011' IN v), v FROM VARBIT_SHIFT_TABLE ; SELECT v, v >> 1 AS vsr, v << 1 AS vsl FROM VARBIT_SHIFT_TABLE ; SELECT v, v >> 8 AS vsr8, v << 8 AS vsl8 FROM VARBIT_SHIFT_TABLE ; DROP TABLE BIT_SHIFT_TABLE; DROP TABLE VARBIT_SHIFT_TABLE; -- Get/Set bit SELECT get_bit(B'0101011000100', 10); SELECT set_bit(B'0101011000100100', 15, 1); SELECT set_bit(B'0101011000100100', 16, 1); -- fail -- Overlay SELECT overlay(B'0101011100' placing '001' from 2 for 3); SELECT overlay(B'0101011100' placing '101' from 6); SELECT overlay(B'0101011100' placing '001' from 11); SELECT overlay(B'0101011100' placing '001' from 20); -- This table is intentionally left around to exercise pg_dump/pg_upgrade CREATE TABLE bit_defaults( b1 bit(4) DEFAULT '1001', b2 bit(4) DEFAULT B'0101', b3 bit varying(5) DEFAULT '1001', b4 bit varying(5) DEFAULT B'0101' ); \d bit_defaults INSERT INTO bit_defaults DEFAULT VALUES; TABLE bit_defaults;