SQLite

      sqlite3VdbeVerifyAbortable(v, onError);
      sqlite3ExprIfTrue(pParse, pExpr, allOk, SQLITE_JUMPIFNULL);
      if( onError==OE_Ignore ){
        sqlite3VdbeGoto(v, ignoreDest);
      }else{
        char *zName = pCheck->a[i].zName;
        if( zName==0 ) zName = pTab->zName;
        if( onError==OE_Replace ) onError = OE_Abort; /* IMP: R-26383-51744 */
        sqlite3HaltConstraint(pParse, SQLITE_CONSTRAINT_CHECK,
                              onError, zName, P4_TRANSIENT,
                              P5_ConstraintCheck);
      }
      sqlite3VdbeResolveLabel(v, allOk);
    }
    pParse->iSelfTab = 0;

*/
static int numberOfCachePages(PCache *p){
  if( p->szCache>=0 ){
    /* IMPLEMENTATION-OF: R-42059-47211 If the argument N is positive then the
    ** suggested cache size is set to N. */
    return p->szCache;
  }else{
    /* IMPLEMANTATION-OF: R-59858-46238 If the argument N is negative, then the
    ** number of cache pages is adjusted to be a number of pages that would
    ** use approximately abs(N*1024) bytes of memory based on the current
    ** page size. */
    return (int)((-1024*(i64)p->szCache)/(p->szPage+p->szExtra));
  }
}

/*************************************************** General Interfaces ******
**
** Initialize and shutdown the page cache subsystem. Neither of these 

do_execsql_test cast-7.12 {
  SELECT '' - 1;
} {-1}

# 2019-06-10
# https://www.sqlite.org/src/info/dd6bffbfb6e61db9
#
# EVIDENCE-OF: R-55084-10555 Casting a TEXT or BLOB value into NUMERIC

# yields either an INTEGER or a REAL result.

#
do_execsql_test cast-7.20 {
  DROP TABLE IF EXISTS t0;
  CREATE TABLE t0 (c0 TEXT);
  INSERT INTO t0(c0) VALUES ('1.0');
  SELECT CAST(c0 AS NUMERIC) FROM t0;
} {1}

  CAST(-9223372036854775809.0 AS INT)
} integer -9223372036854775808
do_expr_test e_expr-31.2.4 { 
  CAST(9223372036854775809.0 AS INT)
} integer 9223372036854775807


# EVIDENCE-OF: R-55084-10555 Casting a TEXT or BLOB value into NUMERIC
# yields either an INTEGER or a REAL result.
#
# EVIDENCE-OF: R-48945-04866 If the input text looks like an integer
# (there is no decimal point nor exponent) and the value is small enough
# to fit in a 64-bit signed integer, then the result will be INTEGER.
#
# EVIDENCE-OF: R-47045-23194 Input text that looks like floating point
# (there is a decimal point and/or an exponent) and the text describes a
# value that can be losslessly converted back and forth between IEEE 754
# 64-bit float and a 51-bit signed integer, then the result is INTEGER.
#
do_expr_test e_expr-32.1.1 { CAST('45'   AS NUMERIC)  } integer 45
do_expr_test e_expr-32.1.2 { CAST('45.0' AS NUMERIC)  } integer 45
do_expr_test e_expr-32.1.3 { CAST('45.2' AS NUMERIC)  } real 45.2
do_expr_test e_expr-32.1.4 { CAST('11abc' AS NUMERIC) } integer 11
do_expr_test e_expr-32.1.5 { CAST('11.1abc' AS NUMERIC) } real 11.1
do_expr_test e_expr-32.1.6 {CAST( '9.223372036e14' AS NUMERIC)} integer  922337203600000
do_expr_test e_expr-32.1.7 {CAST('-9.223372036e14' AS NUMERIC)} integer -922337203600000
do_expr_test e_expr-32.1.8 {CAST( '9.223372036e15' AS NUMERIC)} real     9223372036000000.0
do_expr_test e_expr-32.1.9 {CAST('-9.223372036e15' AS NUMERIC)} real    -9223372036000000.0


# EVIDENCE-OF: R-50300-26941 Any text input that describes a value
# outside the range of a 64-bit signed integer yields a REAL result.
#
do_expr_test e_expr-32.1.20 { CAST('9223372036854775807' AS numeric) } \
   integer 9223372036854775807
do_expr_test e_expr-32.1.21 { CAST('9223372036854775808' AS numeric) } \
   real 9.22337203685478e+18
do_expr_test e_expr-32.1.22 { CAST('-9223372036854775808' AS numeric) } \
   integer -9223372036854775808
do_expr_test e_expr-32.1.23 { CAST('-9223372036854775809' AS numeric) } \
   real -9.22337203685478e+18

# EVIDENCE-OF: R-30347-18702 Casting a REAL or INTEGER value to NUMERIC
# is a no-op, even if a real value could be losslessly converted to an
# integer.
#
do_expr_test e_expr-32.2.1 { CAST(13.0 AS NUMERIC) } real 13.0
do_expr_test e_expr-32.2.2 { CAST(13.5 AS NUMERIC) } real 13.5