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Overview
Comment:Avoid unnecessary calls to sqlite3GetCollSeq() for a small performance gain.
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SHA3-256: 503ba172e4c32e288abf006fc5cb53fd2b0313c4ee4c526c2d9c4c21b7178f2d
User & Date: drh 2017-07-06 02:49:26
Context
2017-07-06
03:06
Small size reduction in findCollSeqEntry(). check-in: 55ecd303 user: drh tags: trunk
02:49
Avoid unnecessary calls to sqlite3GetCollSeq() for a small performance gain. check-in: 503ba172 user: drh tags: trunk
01:28
Slightly more compact implementation of the byte-code generator for the COMMIT and ROLLBACK commands. check-in: 4da663d9 user: drh tags: trunk
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Changes to src/callback.c.

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**
** If required, this routine calls the 'collation needed' callback to
** request a definition of the collating sequence. If this doesn't work, 
** an equivalent collating sequence that uses a text encoding different
** from the main database is substituted, if one is available.
*/
int sqlite3CheckCollSeq(Parse *pParse, CollSeq *pColl){
  if( pColl ){
    const char *zName = pColl->zName;
    sqlite3 *db = pParse->db;
    CollSeq *p = sqlite3GetCollSeq(pParse, ENC(db), pColl, zName);
    if( !p ){
      return SQLITE_ERROR;
    }
    assert( p==pColl );







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**
** If required, this routine calls the 'collation needed' callback to
** request a definition of the collating sequence. If this doesn't work, 
** an equivalent collating sequence that uses a text encoding different
** from the main database is substituted, if one is available.
*/
int sqlite3CheckCollSeq(Parse *pParse, CollSeq *pColl){
  if( pColl && pColl->xCmp==0 ){
    const char *zName = pColl->zName;
    sqlite3 *db = pParse->db;
    CollSeq *p = sqlite3GetCollSeq(pParse, ENC(db), pColl, zName);
    if( !p ){
      return SQLITE_ERROR;
    }
    assert( p==pColl );