Package org.openrdf.sail.rdbms.algebra.base

Examples of org.openrdf.sail.rdbms.algebra.base.SqlExpr

68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
  @Override
  public void meet(SqlAnd node)
    throws RuntimeException
  {
    super.meet(node);
    SqlExpr left = node.getLeftArg();
    SqlExpr right = node.getRightArg();
    if (left instanceof FalseValue || right instanceof FalseValue) {
      replace(node, new FalseValue());
    }
    else if (left instanceof TrueValue && right instanceof TrueValue) {
      replace(node, new TrueValue());
    }
    else if (left instanceof TrueValue) {
      replace(node, right.clone());
    }
    else if (right instanceof TrueValue) {
      replace(node, left.clone());
    }
    else if (right instanceof SqlNull || left instanceof SqlNull) {
View Full Code Here
140
141
142
143
144
145
146
147
148
149
150
  @Override
  public void meet(SqlCompare node)
    throws RuntimeException
  {
    super.meet(node);
    SqlExpr left = node.getLeftArg();
    SqlExpr right = node.getRightArg();
    if (left instanceof SqlNull || right instanceof SqlNull) {
      replace(node, new SqlNull());
    }
  }
View Full Code Here
152
153
154
155
156
157
158
159
160
161
162
163
  @Override
  public void meet(SqlConcat node)
    throws RuntimeException
  {
    super.meet(node);
    SqlExpr left = node.getLeftArg();
    SqlExpr right = node.getRightArg();
    if (left instanceof StringValue && right instanceof StringValue) {
      StringValue l = (StringValue)left;
      StringValue r = (StringValue)right;
      replace(node, new StringValue(l.getValue() + r.getValue()));
    }
View Full Code Here
166
167
168
169
170
171
172
173
174
175
176
177
  @Override
  public void meet(SqlEq node)
    throws RuntimeException
  {
    super.meet(node);
    SqlExpr left = node.getLeftArg();
    SqlExpr right = node.getRightArg();
    if (left instanceof SqlNull || right instanceof SqlNull) {
      replace(node, new SqlNull());
    }
    else if (left instanceof SqlConstant<?> && right instanceof SqlConstant<?>) {
      SqlConstant<?> l = (SqlConstant<?>)left;
View Full Code Here
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
  @Override
  public void meet(SqlIsNull node)
    throws RuntimeException
  {
    super.meet(node);
    SqlExpr arg = node.getArg();
    if (arg instanceof SqlNull) {
      replace(node, new TrueValue());
    }
    else if (arg instanceof SqlConstant<?>) {
      replace(node, new FalseValue());
    }
    else if (arg instanceof SqlCase) {
      SqlExpr rep = null;
      SqlExpr prev = null;
      SqlCase scase = (SqlCase)arg;
      for (Entry entry : scase.getEntries()) {
        SqlExpr condition = entry.getCondition();
        if (rep == null) {
          rep = and(condition.clone(), isNull(entry.getResult().clone()));
          prev = not(condition.clone());
        }
        else {
          rep = or(rep, and(and(prev.clone(), condition.clone()), isNull(entry.getResult().clone())));
          prev = and(prev, not(condition.clone()));
        }
      }
      replace(node, or(rep, prev.clone()));
    }
  }
View Full Code Here
234
235
236
237
238
239
240
241
242
243
244
  @Override
  public void meet(SqlNot node)
    throws RuntimeException
  {
    super.meet(node);
    SqlExpr arg = node.getArg();
    if (arg instanceof TrueValue) {
      replace(node, new FalseValue());
    }
    else if (arg instanceof FalseValue) {
      replace(node, new TrueValue());
View Full Code Here
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
  @Override
  public void meet(SqlOr node)
    throws RuntimeException
  {
    super.meet(node);
    SqlExpr left = node.getLeftArg();
    SqlExpr right = node.getRightArg();
    if (left instanceof TrueValue || right instanceof TrueValue) {
      replace(node, new TrueValue());
    }
    else if (left instanceof FalseValue && right instanceof FalseValue) {
      replace(node, new FalseValue());
    }
    else if (left instanceof FalseValue) {
      replace(node, right.clone());
    }
    else if (right instanceof FalseValue) {
      replace(node, left.clone());
    }
    else if (right instanceof SqlNull && andAllTheWay(node)) {
      replace(node, left.clone());
    }
    else if (left instanceof SqlNull && andAllTheWay(node)) {
      replace(node, right.clone());
    }
    else if (right instanceof SqlNull && left instanceof SqlNull) {
      replace(node, new SqlNull());
    }
    else if (left instanceof SqlNull && right instanceof SqlOr) {
      SqlOr r = (SqlOr)right;
      SqlExpr rleft = r.getLeftArg();
      SqlExpr rright = r.getRightArg();
      if (rleft instanceof SqlNull || rright instanceof SqlNull) {
        replace(node, right.clone());
      }
    }
    else if (right instanceof SqlNull && left instanceof SqlOr) {
      SqlOr l = (SqlOr)left;
      SqlExpr lleft = l.getLeftArg();
      SqlExpr lright = l.getRightArg();
      if (lleft instanceof SqlNull || lright instanceof SqlNull) {
        replace(node, left.clone());
      }
    }
    else if (right instanceof SqlNull && left instanceof SqlAnd) {
      // value IS NOT NULL AND value = ? OR NULL
      // -> value = ?
      SqlAnd l = (SqlAnd)left;
      SqlExpr lleft = l.getLeftArg();
      SqlExpr lright = l.getRightArg();
      SqlExpr isNotNull = arg(arg(lleft, SqlNot.class), SqlIsNull.class);
      SqlExpr isNotEq = other(lright, isNotNull, SqlEq.class);
      if (isNotEq instanceof SqlConstant) {
        replace(node, lright);
      }
    }
  }
View Full Code Here
339
340
341
342
343
344
345
346
347
348
349
350
351
352
  }

  private SqlExpr other(SqlExpr node, SqlExpr compare, Class<? extends BinarySqlOperator> type) {
    if (type.isInstance(node)) {
      BinarySqlOperator cast = type.cast(node);
      SqlExpr left = cast.getLeftArg();
      SqlExpr right = cast.getRightArg();
      if (left.equals(compare))
        return right;
      if (right.equals(compare))
        return left;
    }
    return null;
  }
View Full Code Here
34
35
36
37
38
39
40
41
42
43
44
45
46
  @Override
  public void meet(SqlRegex node)
    throws RuntimeException
  {
    super.meet(node);
    SqlExpr flags = node.getFlagsArg();
    if (!(flags instanceof SqlNull)) {
      SqlExpr pattern = node.getPatternArg();
      SqlExpr prefix = concat(str("(?"), flags, str(")"));
      pattern.replaceWith(concat(prefix, pattern.clone()));
      node.setFlagsArg(null);
    }
  }
View Full Code Here
48
49
50
51
52
53
54
55
56
57
58
  private SqlExpr str(String string) {
    return new StringValue(string);
  }

  private SqlExpr concat(SqlExpr... exprs) {
    SqlExpr concat = null;
    for (SqlExpr expr : exprs) {
      if (concat == null) {
        concat = expr;
      }
      else {
View Full Code Here
TOP

Related Classes of org.openrdf.sail.rdbms.algebra.base.SqlExpr

  • org.openrdf.sail.rdbms.algebra.factories.BooleanExprFactory
  • org.openrdf.sail.rdbms.algebra.factories.NumericExprFactory
  • org.openrdf.sail.rdbms.evaluation.QueryBuilder
  • org.openrdf.sail.rdbms.optimizers.SelectQueryOptimizer
  • org.openrdf.sail.rdbms.optimizers.SqlConstantOptimizer
  • org.openrdf.sail.rdbms.postgresql.PgSqlRegexFlagsInliner
    • Copyright © 2018 www.massapicom. All rights reserved.
    All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.