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SQLITE3_SQL(3)             Library Functions Manual             SQLITE3_SQL(3)

NAME
     sqlite3_sql, sqlite3_expanded_sql, sqlite3_normalized_sql - Retrieving
     Statement SQL

SYNOPSIS
     const char *
     sqlite3_sql(sqlite3_stmt *pStmt);

     char *
     sqlite3_expanded_sql(sqlite3_stmt *pStmt);

     const char *
     sqlite3_normalized_sql(sqlite3_stmt *pStmt);

DESCRIPTION
     The sqlite3_sql(P) interface returns a pointer to a copy of the UTF-8 SQL
     text used to create prepared statement P if P was created by
     sqlite3_prepare_v2(), sqlite3_prepare_v3(), sqlite3_prepare16_v2(), or
     sqlite3_prepare16_v3().  The sqlite3_expanded_sql(P) interface returns a
     pointer to a UTF-8 string containing the SQL text of prepared statement P
     with bound parameters expanded.  The sqlite3_normalized_sql(P) interface
     returns a pointer to a UTF-8 string containing the normalized SQL text of
     prepared statement P.  The semantics used to normalize a SQL statement
     are unspecified and subject to change.  At a minimum, literal values will
     be replaced with suitable placeholders.

     For example, if a prepared statement is created using the SQL text
     "SELECT $abc,:xyz" and if parameter $abc is bound to integer 2345 and
     parameter :xyz is unbound, then sqlite3_sql() will return the original
     string, "SELECT $abc,:xyz" but sqlite3_expanded_sql() will return "SELECT
     2345,NULL".

     The sqlite3_expanded_sql() interface returns NULL if insufficient memory
     is available to hold the result, or if the result would exceed the the
     maximum string length determined by the SQLITE_LIMIT_LENGTH.

     The SQLITE_TRACE_SIZE_LIMIT compile-time option limits the size of bound
     parameter expansions.  The SQLITE_OMIT_TRACE compile-time option causes
     sqlite3_expanded_sql() to always return NULL.

     The strings returned by sqlite3_sql(P) and sqlite3_normalized_sql(P) are
     managed by SQLite and are automatically freed when the prepared statement
     is finalized.  The string returned by sqlite3_expanded_sql(P), on the
     other hand, is obtained from sqlite3_malloc() and must be free by the
     application by passing it to sqlite3_free().

SEE ALSO
     sqlite3_stmt(3), sqlite3_malloc(3), sqlite3_prepare(3),
     SQLITE_LIMIT_LENGTH(3)

NetBSD 8.99.34                 December 19, 2018                NetBSD 8.99.34