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| - | ====== Appendix ====== | ||
| - | |||
| - | [[dev:appendix:home|Appendix]] -> [[dev:appendix:reference:home|Reference]] -> **[[dev:appendix:reference:datatypes|Omnidex Datatypes]]** | ||
| - | |||
| - | ===== Omnidex Datatypes ===== | ||
| - | |||
| - | Omnidex supports a wide variety of datatypes, including standard ANSI datatypes, Omnidex-specific datatypes and RDBMS-specific datatypes. | ||
| - | |||
| - | ==== Standard Datatypes ==== | ||
| - | |||
| - | Omnidex supports the following standard datatypes: | ||
| - | |||
| - | ^Datatype ^Class ^Description ^ | ||
| - | |CHARACTER(//n//) |STRING |Space-filled character string of //n// characters | | ||
| - | |CHAR(//n//) |STRING |Synonym for CHARACTER(//n//) | | ||
| - | |C STRING(//n//) |STRING |Null-terminated character string of //n// characters | | ||
| - | |VARCHAR(//n//)* |STRING |String of max //n// characters, with length variable | | ||
| - | |CLOB(//n//)* |STRING |Character large object of max //n// characters, with length variable | | ||
| - | |[SIGNED] TINYINT |NUMERIC |1-byte, signed integer ( -128 to 127 ) | | ||
| - | |UNSIGNED TINYINT |NUMERIC |1-byte, unsigned integer ( 0 to 255 ) | | ||
| - | |[SIGNED] SMALLINT |NUMERIC |2-byte, signed integer ( -32768 to 32767 ) | | ||
| - | |UNSIGNED SMALLINT |NUMERIC |2-byte, unsigned integer ( 0 to 65535 ) | | ||
| - | |[SIGNED] INTEGER |NUMERIC |4-byte, signed integer ( 2147483648 to 2147483647 ) | | ||
| - | |UNSIGNED INTEGER |NUMERIC |4-byte, unsigned integer ( 0 to 4294967295 ) | | ||
| - | |[SIGNED] BIGINT |NUMERIC |8-byte, signed integer ( %%-2^63 to 2^63-1%% ) | | ||
| - | |UNSIGNED BIGINT |NUMERIC |8-byte, unsigned integer ( %%0 to 2^64-1%% ) | | ||
| - | |FLOAT |NUMERIC |IEEE four-byte, single-precision floating point | | ||
| - | |DOUBLE |NUMERIC |IEEE eight-byte, double-precision floating point | | ||
| - | |ANSI DATE |DATE |10-byte ANSI date | | ||
| - | |ANSI TIME |DATE |11-byte ANSI time | | ||
| - | |ANSI DATETIME |DATE |24-byte ANSI datetime | | ||
| - | |ASCII DATE |DATE |8-byte ASCII date ( YYYYMMDD ) | | ||
| - | |ASCII DATE(6) |DATE |6-byte ASCII date ( YYMMDD ) | | ||
| - | |C DATETIME |DATE |8-byte integer based on the C time() routine | | ||
| - | |ODBC DATE |DATE |6-byte ODBC proprietary date | | ||
| - | |ODBC TIME |DATE |6-byte ODBC proprietary time | | ||
| - | |ODBC DATETIME |DATE |6-byte ODBC proprietary datetime | | ||
| - | |ORACLE DATE |DATE |7-byte Oracle proprietary date | | ||
| - | |ORACLE TIME |DATE |7-byte Oracle proprietary time | | ||
| - | |ORACLE DATETIME |DATE |7-byte Oracle proprietary datetime | | ||
| - | |OMNIDEX DATE(//n//) |DATE |Omnidex proprietary date supporting //n// digits of YYYYMMDD | | ||
| - | |OMNIDEX TIME(//n//) |DATE |Omnidex proprietary time supporting //n// digits of HHMMSSNN | | ||
| - | |OMNIDEX DATETIME(//n//)|DATE |Omnidex proprietary datetime supporting //n// digits of YYYYMMDDHHMMSSNN | | ||
| - | |* Omnidex recommends use of the CHARACTER and C STRING datatypes rather than VARCHAR and CLOB due to the requirement of a length variable. ||| | ||
| - | |||
| - | ==== National Character Datatypes ==== | ||
| - | |||
| - | Omnidex also provides partial support for National Character Datatypes (sometimes called | ||
| - | Unicode datatypes or wide characters). The Omnidex SQL Engine will process these | ||
| - | datatypes, but the Omnidex Indexing Engine will only index the lower 8 bits of these | ||
| - | datatypes. | ||
| - | |||
| - | ^Datatype ^Class ^Description ^ | ||
| - | |NATIONAL CHARACTER(//n//) |STRING |Space-filled character string of //n// characters | | ||
| - | |NATIONAL CHAR(//n//) |STRING |Synonym for CHARACTER(//n//) | | ||
| - | |NATIONAL C STRING(//n//) |STRING |Null-terminated character string of //n// characters | | ||
| - | |NATIONAL VARCHAR(//n//)* |STRING |String of max //n// characters, with length variable | | ||
| - | |NATIONAL CLOB(//n//)* |STRING |Character large object of max //n// characters, with length variable | | ||
| - | | * Omnidex recommends use of the NATIONAL CHARACTER and NATIONAL C STRING datatypes rather than NATIONAL VARCHAR and NATIONAL CLOB due to the requirement of a length variable. ||| | ||
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