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Overview
Comment: | Minor changes to the 'Expressions' section of lang.in. |
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Downloads: | Tarball | ZIP archive |
Timelines: | family | ancestors | descendants | both | trunk |
Files: | files | file ages | folders |
SHA1: |
8ddf5c33ed54bb02d580243d5a94d25d |
User & Date: | dan 2010-07-17 18:42:53.000 |
Context
2010-07-21
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16:11 | Update news, change log, and testing statistics prior to the release. (check-in: cc4bcb6790 user: drh tags: trunk) | |
2010-07-17
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18:42 | Minor changes to the 'Expressions' section of lang.in. (check-in: 8ddf5c33ed user: dan tags: trunk) | |
15:42 | Note in the docs that "+ NULL" is NULL. (check-in: 29da1fe525 user: dan tags: trunk) | |
Changes
Changes to pages/lang.in.
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1246 1247 1248 1249 1250 1251 1252 | <blockquote><pre> <font color="#2c2cf0"><big>|| * / % + - << >> & | < <= > >= | | | 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 | <blockquote><pre> <font color="#2c2cf0"><big>|| * / % + - << >> & | < <= > >= = == != <> </big>IS IS NOT IN LIKE GLOB MATCH REGEXP AND OR</font> </pre></blockquote>)^ <p>^(Supported unary prefix operators are these:</p> <blockquote><pre> |
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1277 1278 1279 1280 1281 1282 1283 | <tcl> hd_puts "[Operator =] or [Operator ==]. ^The non-equals operator can be either [Operator !=] or [Operator {<>}]. ^The [Operator ||] operator is \"concatenate\" - it joins together the two strings of its operands. | | | | | | > > > > > | | | 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 | <tcl> hd_puts "[Operator =] or [Operator ==]. ^The non-equals operator can be either [Operator !=] or [Operator {<>}]. ^The [Operator ||] operator is \"concatenate\" - it joins together the two strings of its operands. ^The operator [Operator %] outputs the value of its left operand modulo its right operand.</p> <p>^The result of any binary operator is either a numeric value or NULL, except for the [Operator ||] concatenation operator which always evaluates to either NULL or a text value.</p>" hd_fragment {isisnot} {IS operator} {IS NOT operator} hd_puts "<p>^The [Operator IS] and [Operator {IS NOT}] operators work like [Operator =] and [Operator !=] except when one or both of the operands are NULL. ^In this case, if both operands are NULL, then the IS operator evaluates to 1 (true) and the IS NOT operator evaluates to 0 (false). ^If one operand is NULL and the other is not, then the IS operator evaluates to 0 (false) and the IS NOT operator is 1 (true). ^It is not possible for an IS or IS NOT expression to evaluate to NULL. ^Operators [Operator IS] and [Operator {IS NOT}] have the same precedence as [Operator =]." <tcl>hd_fragment litvalue {literal value}</tcl> <h3>Literal Values</h3> <p> ^A literal value is a constant of some kind. ^Literal values may be integers, floating point numbers, strings, BLOBs, or NULLs. |
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