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<div id="projectbrief">A C++ DAL/ORM code generation framework</div>
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<h1>WSqlDataType Namespace Reference</h1> </div>
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<p><a class="el" href="namespace_w_sql_data_type.html" title="WSqlDataType namespace - flags for supported SQL data types.">WSqlDataType</a> namespace - flags for supported SQL data types.
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<a href="#_details">More...</a></p>
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<hr/><a name="_details"></a><h2>Detailed Description</h2>
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<div class="textblock"><p><a class="el" href="namespace_w_sql_data_type.html" title="WSqlDataType namespace - flags for supported SQL data types.">WSqlDataType</a> namespace - flags for supported SQL data types. </p>
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<p>This is a container for type flags and convenience functions for the supported SQL datatypes.</p>
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<p>These are the ANSI SQl standard types supported by WSQL - these will be mapped to native C++ data types in ORM class generation. For example a TINYINT column will declared as a member of type "short", a VARCHAR or TEXT as type std::string, a DECIMAL to a double, etc. The following is a list of the types with specifications - Implementers of drivers should use this as a guide for translating types for a particular DBMS.</p>
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<p>Writers of drivers should translate any proprietary or other data types specific to the DBMS of the driver to these types. Most DBMS metadata is returned in a string identifier of one of these types and can usually be mapped conveniently by using the functions toString(type) or toType(string).</p>
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<p>See the following for more information on the specific data types: </p>
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<div class="fragment"><pre class="fragment"> Note: these types are modeled after the MySQL data types (which seemed the broadest
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and closest to ANSI standard). I include these notes <span class="keywordflow">for</span> reference only - they are
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<span class="keywordflow">for</span> determining how types will be converted..(todo)
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<a class="code" href="namespace_w_sql_1_1_w_sql_data_type.html#aa234580d74e3dfc10946a4ec8e317d11a2fa7f6e8be4f3f438461f01e8aacd76e">TINYINT</a> - A very small integer that can be <span class="keywordtype">signed</span> or <span class="keywordtype">unsigned</span>. If <span class="keywordtype">signed</span>, the
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allowable range is from -128 to 127. If <span class="keywordtype">unsigned</span>, the allowable range is from 0
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to 255. You can specify a width of up to 4 digits.
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<a class="code" href="namespace_w_sql_1_1_w_sql_data_type.html#aa234580d74e3dfc10946a4ec8e317d11a185153956d8bff78e071637d75518049">SMALLINT</a> - A small integer that can be <span class="keywordtype">signed</span> or <span class="keywordtype">unsigned</span>. If <span class="keywordtype">signed</span>, the
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allowable range is from -32768 to 32767. If <span class="keywordtype">unsigned</span>, the allowable range is
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from 0 to 65535. You can specify a width of up to 5 digits.
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<a class="code" href="namespace_w_sql_1_1_w_sql_data_type.html#aa234580d74e3dfc10946a4ec8e317d11a5cd5fddf9f96a63b0e8fbab168793348">MEDIUMINT</a> - A medium-sized integer that can be <span class="keywordtype">signed</span> or <span class="keywordtype">unsigned</span>. If <span class="keywordtype">signed</span>,
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the allowable range is from -8388608 to 8388607. If <span class="keywordtype">unsigned</span>, the allowable
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range is from 0 to 16777215. You can specify a width of up to 9 digits.
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<a class="code" href="namespace_w_sql_1_1_w_sql_data_type.html#aa234580d74e3dfc10946a4ec8e317d11afc4d0f8755ce336f16e9ecc467c29175">INT</a> - A normal-sized integer that can be <span class="keywordtype">signed</span> or <span class="keywordtype">unsigned</span>. If <span class="keywordtype">signed</span>, the
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allowable range is from -2147483648 to 2147483647. If <span class="keywordtype">unsigned</span>, the allowable
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range is from 0 to 4294967295. You can specify a width of up to 11 digits.
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<a class="code" href="namespace_w_sql_1_1_w_sql_data_type.html#aa234580d74e3dfc10946a4ec8e317d11a18d7620211cfa3ba63be7f081fc0c181">BIGINT</a> - A large integer that can be <span class="keywordtype">signed</span> or <span class="keywordtype">unsigned</span>. If <span class="keywordtype">signed</span>, the
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allowable range is from -9223372036854775808 to 9223372036854775807. If
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<span class="keywordtype">unsigned</span>, the allowable range is from 0 to 18446744073709551615. You can specify
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a width of up to 11 digits.
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<a class="code" href="namespace_w_sql_1_1_w_sql_data_type.html#aa234580d74e3dfc10946a4ec8e317d11a82673be233e9f7a52bbb9e94f1ea526a">FLOAT</a>(M,D) - A floating-point number that cannot be <span class="keywordtype">unsigned</span>. You can define the
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display length (M) and the number of decimals (D). This is not required and will
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default to 10,2, where 2 is the number of decimals and 10 is the total number of
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digits (including decimals). Decimal precision can go to 24 places for a <a class="code" href="namespace_w_sql_1_1_w_sql_data_type.html#aa234580d74e3dfc10946a4ec8e317d11a82673be233e9f7a52bbb9e94f1ea526a">FLOAT</a>.
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<a class="code" href="namespace_w_sql_1_1_w_sql_data_type.html#aa234580d74e3dfc10946a4ec8e317d11ad9d614c9575a0891342c3171fc2772e5">DOUBLE</a>(M,D) - A <span class="keywordtype">double</span> precision floating-point number that cannot be <span class="keywordtype">unsigned</span>.
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You can define the display length (M) and the number of decimals (D). This is
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not required and will default to 16,4, where 4 is the number of decimals.
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Decimal precision can go to 53 places for a <a class="code" href="namespace_w_sql_1_1_w_sql_data_type.html#aa234580d74e3dfc10946a4ec8e317d11ad9d614c9575a0891342c3171fc2772e5">DOUBLE</a>. REAL is a synonym for
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<a class="code" href="namespace_w_sql_1_1_w_sql_data_type.html#aa234580d74e3dfc10946a4ec8e317d11ad9d614c9575a0891342c3171fc2772e5">DOUBLE</a>.
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<a class="code" href="namespace_w_sql_1_1_w_sql_data_type.html#aa234580d74e3dfc10946a4ec8e317d11aead2d4157138ca0913950d5efb1a2ca6">DECIMAL</a>(M,D) - An unpacked floating-point number that cannot be <span class="keywordtype">unsigned</span>. In
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unpacked decimals, each decimal corresponds to one byte. Defining the display
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length (M) and the number of decimals (D) is required. NUMERIC is a synonym for
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<a class="code" href="namespace_w_sql_1_1_w_sql_data_type.html#aa234580d74e3dfc10946a4ec8e317d11aead2d4157138ca0913950d5efb1a2ca6">DECIMAL</a>.
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Date and Time Types:
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<a class="code" href="namespace_w_sql_1_1_w_sql_data_type.html#aa234580d74e3dfc10946a4ec8e317d11a2c6b3641a625bd3ff903a2c247b26517">DATE</a> - A date in YYYY-MM-DD format, between 1000-01-01 and 9999-12-31. For
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example, December 30th, 1973 would be stored as 1973-12-30.
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<a class="code" href="namespace_w_sql_1_1_w_sql_data_type.html#aa234580d74e3dfc10946a4ec8e317d11abd11772d96be90ace717e22ba24bc71e">DATETIME</a> - A date and time combination in YYYY-MM-DD HH:MM:SS format, between
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1000-01-01 00:00:00 and 9999-12-31 23:59:59. For example, 3:30 in the afternoon
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on December 30th, 1973 would be stored as 1973-12-30 15:30:00.
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<a class="code" href="namespace_w_sql_1_1_w_sql_data_type.html#aa234580d74e3dfc10946a4ec8e317d11ab5c547c63dba19815e88b2cca05f4e32">TIMESTAMP</a> - A timestamp between midnight, January 1, 1970 and sometime in 2037.
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This looks like the previous <a class="code" href="namespace_w_sql_1_1_w_sql_data_type.html#aa234580d74e3dfc10946a4ec8e317d11abd11772d96be90ace717e22ba24bc71e">DATETIME</a> format, only without the hyphens between
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numbers; 3:30 in the afternoon on December 30th, 1973 would be stored as
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19731230153000 ( YYYYMMDDHHMMSS ).
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<a class="code" href="namespace_w_sql_1_1_w_sql_data_type.html#aa234580d74e3dfc10946a4ec8e317d11a1e863429b29d2e90ff60f8251017baef">TIME</a> - Stores the time in HH:MM:SS format.
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<a class="code" href="namespace_w_sql_1_1_w_sql_data_type.html#aa234580d74e3dfc10946a4ec8e317d11a8f6410ee01071f02a1d75259e4a4120c">YEAR</a>(M) - Stores a year in 2-digit or 4-digit format. If the length is specified
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as 2 (for example <a class="code" href="namespace_w_sql_1_1_w_sql_data_type.html#aa234580d74e3dfc10946a4ec8e317d11a8f6410ee01071f02a1d75259e4a4120c">YEAR</a>(2)), YEAR can be 1970 to 2069 (70 to 69). If the length
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is specified as 4, YEAR can be 1901 to 2155. The default length is 4.
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String Types:
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<a class="code" href="namespace_w_sql_1_1_w_sql_data_type.html#aa234580d74e3dfc10946a4ec8e317d11af83d87e0848372230d82996d24f6a0ce">CHAR</a>(M) - A fixed-length <span class="keywordtype">string</span> between 1 and 255 characters in length (for
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example <a class="code" href="namespace_w_sql_1_1_w_sql_data_type.html#aa234580d74e3dfc10946a4ec8e317d11af83d87e0848372230d82996d24f6a0ce">CHAR</a>(5)), right-padded with spaces to the specified length when stored.
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Defining a length is not required, but the default is 1.
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<a class="code" href="namespace_w_sql_1_1_w_sql_data_type.html#aa234580d74e3dfc10946a4ec8e317d11ad02611db29673467c36fbd4d267dccf8">VARCHAR</a>(M) - A variable-length <span class="keywordtype">string</span> between 1 and 255 characters in length;
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for example <a class="code" href="namespace_w_sql_1_1_w_sql_data_type.html#aa234580d74e3dfc10946a4ec8e317d11ad02611db29673467c36fbd4d267dccf8">VARCHAR</a>(25). You must define a length when creating a <a class="code" href="namespace_w_sql_1_1_w_sql_data_type.html#aa234580d74e3dfc10946a4ec8e317d11ad02611db29673467c36fbd4d267dccf8">VARCHAR</a> field.
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<a class="code" href="namespace_w_sql_1_1_w_sql_data_type.html#aa234580d74e3dfc10946a4ec8e317d11a79b1e3c78a2aae4000205a6340120066">BLOB</a> or <a class="code" href="namespace_w_sql_1_1_w_sql_data_type.html#aa234580d74e3dfc10946a4ec8e317d11ad0523af90d4025e99f05182cac18863e">TEXT</a> - A field with a maximum length of 65535 characters. BLOBs are
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"Binary Large Objects" and are used to store large amounts of binary data, such
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as images or other types of files. Fields defined as <a class="code" href="namespace_w_sql_1_1_w_sql_data_type.html#aa234580d74e3dfc10946a4ec8e317d11ad0523af90d4025e99f05182cac18863e">TEXT</a> also hold large
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amounts of data; the difference between the two is that sorts and comparisons on
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stored data are case sensitive on BLOBs and are not case sensitive in <a class="code" href="namespace_w_sql_1_1_w_sql_data_type.html#aa234580d74e3dfc10946a4ec8e317d11ad0523af90d4025e99f05182cac18863e">TEXT</a>
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fields. You do not specify a length with <a class="code" href="namespace_w_sql_1_1_w_sql_data_type.html#aa234580d74e3dfc10946a4ec8e317d11a79b1e3c78a2aae4000205a6340120066">BLOB</a> or <a class="code" href="namespace_w_sql_1_1_w_sql_data_type.html#aa234580d74e3dfc10946a4ec8e317d11ad0523af90d4025e99f05182cac18863e">TEXT</a>.
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TINYBLOB or <a class="code" href="namespace_w_sql_1_1_w_sql_data_type.html#aa234580d74e3dfc10946a4ec8e317d11a229e9a69a403ad69b83e3ffcc6cafbab">TINYTEXT</a> - A <a class="code" href="namespace_w_sql_1_1_w_sql_data_type.html#aa234580d74e3dfc10946a4ec8e317d11a79b1e3c78a2aae4000205a6340120066">BLOB</a> or <a class="code" href="namespace_w_sql_1_1_w_sql_data_type.html#aa234580d74e3dfc10946a4ec8e317d11ad0523af90d4025e99f05182cac18863e">TEXT</a> column with a maximum length of 255
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characters. You do not specify a length with TINYBLOB or <a class="code" href="namespace_w_sql_1_1_w_sql_data_type.html#aa234580d74e3dfc10946a4ec8e317d11a229e9a69a403ad69b83e3ffcc6cafbab">TINYTEXT</a>.
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MEDIUMBLOB or <a class="code" href="namespace_w_sql_1_1_w_sql_data_type.html#aa234580d74e3dfc10946a4ec8e317d11a3ec0265b0cd32336a8cc6927706a97d6">MEDIUMTEXT</a> - A <a class="code" href="namespace_w_sql_1_1_w_sql_data_type.html#aa234580d74e3dfc10946a4ec8e317d11a79b1e3c78a2aae4000205a6340120066">BLOB</a> or <a class="code" href="namespace_w_sql_1_1_w_sql_data_type.html#aa234580d74e3dfc10946a4ec8e317d11ad0523af90d4025e99f05182cac18863e">TEXT</a> column with a maximum length of
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16777215 characters. You do not specify a length with MEDIUMBLOB or <a class="code" href="namespace_w_sql_1_1_w_sql_data_type.html#aa234580d74e3dfc10946a4ec8e317d11a3ec0265b0cd32336a8cc6927706a97d6">MEDIUMTEXT</a>.
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LONGBLOB or <a class="code" href="namespace_w_sql_1_1_w_sql_data_type.html#aa234580d74e3dfc10946a4ec8e317d11a4c4198e10fa328e23de4cccfac355eef">LONGTEXT</a> - A <a class="code" href="namespace_w_sql_1_1_w_sql_data_type.html#aa234580d74e3dfc10946a4ec8e317d11a79b1e3c78a2aae4000205a6340120066">BLOB</a> or <a class="code" href="namespace_w_sql_1_1_w_sql_data_type.html#aa234580d74e3dfc10946a4ec8e317d11ad0523af90d4025e99f05182cac18863e">TEXT</a> column with a maximum length of 4294967295
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characters. You do not specify a length with LONGBLOB or <a class="code" href="namespace_w_sql_1_1_w_sql_data_type.html#aa234580d74e3dfc10946a4ec8e317d11a4c4198e10fa328e23de4cccfac355eef">LONGTEXT</a>.
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<a class="code" href="namespace_w_sql_1_1_w_sql_data_type.html#aa234580d74e3dfc10946a4ec8e317d11a693d7d1d546702a3efaa1e0df104e1eb">ENUM</a> - An enumeration, which is a fancy term for list. When defining an <a class="code" href="namespace_w_sql_1_1_w_sql_data_type.html#aa234580d74e3dfc10946a4ec8e317d11a693d7d1d546702a3efaa1e0df104e1eb">ENUM</a>,
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you are creating a list of items from which the value must be selected (or it
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can be NULL). For example, if you wanted your field to contain "A" or "B" or
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"C", you would define your ENUM as ENUM ('A', 'B', 'C') and only those values
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(or NULL) could ever populate that field.
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</pre></div> </div></div>
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<hr class="footer"/><address class="footer"><small>Generated on Mon Oct 31 2011 12:57:17 for WORM by 
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<img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.7.3 </small></address>
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